./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e1ff0e6 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/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -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 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-15 01:13:57,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 01:13:57,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 01:13:57,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 01:13:57,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 01:13:57,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 01:13:57,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 01:13:57,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 01:13:57,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 01:13:57,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 01:13:57,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 01:13:57,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 01:13:57,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 01:13:57,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 01:13:57,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 01:13:57,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 01:13:57,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 01:13:57,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 01:13:57,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 01:13:57,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 01:13:57,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 01:13:57,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 01:13:57,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 01:13:57,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 01:13:57,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 01:13:57,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 01:13:57,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 01:13:57,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 01:13:57,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 01:13:57,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 01:13:57,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 01:13:57,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 01:13:57,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 01:13:57,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 01:13:57,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 01:13:57,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 01:13:57,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 01:13:57,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 01:13:57,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 01:13:57,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 01:13:57,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 01:13:57,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 01:13:57,959 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 01:13:57,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 01:13:57,960 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 01:13:57,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 01:13:57,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 01:13:57,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 01:13:57,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 01:13:57,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 01:13:57,963 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 01:13:57,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 01:13:57,964 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 01:13:57,964 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 01:13:57,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 01:13:57,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 01:13:57,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 01:13:57,965 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 01:13:57,965 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 01:13:57,965 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 01:13:57,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 01:13:57,966 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 01:13:57,966 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 01:13:57,966 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 01:13:57,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 01:13:57,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 01:13:57,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 01:13:57,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 01:13:57,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 01:13:57,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 01:13:57,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 01:13:57,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 01:13:57,969 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 01:13:57,969 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 01:13:57,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 01:13:57,969 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 01:13:57,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2023-02-15 01:13:58,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 01:13:58,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 01:13:58,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 01:13:58,254 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 01:13:58,254 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 01:13:58,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2023-02-15 01:13:59,414 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 01:13:59,571 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 01:13:59,571 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2023-02-15 01:13:59,575 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/366f74c95/26c5627855d14af781d67a01ff416b56/FLAG6b6d23833 [2023-02-15 01:13:59,586 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/366f74c95/26c5627855d14af781d67a01ff416b56 [2023-02-15 01:13:59,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 01:13:59,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 01:13:59,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 01:13:59,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 01:13:59,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 01:13:59,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:13:59" (1/1) ... [2023-02-15 01:13:59,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4127f570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:59, skipping insertion in model container [2023-02-15 01:13:59,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:13:59" (1/1) ... [2023-02-15 01:13:59,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 01:13:59,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 01:13:59,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 01:13:59,729 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 01:13:59,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 01:13:59,755 INFO L208 MainTranslator]: Completed translation [2023-02-15 01:13:59,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:59 WrapperNode [2023-02-15 01:13:59,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 01:13:59,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 01:13:59,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 01:13:59,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 01:13:59,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:59" (1/1) ... [2023-02-15 01:13:59,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:59" (1/1) ... [2023-02-15 01:13:59,782 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2023-02-15 01:13:59,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 01:13:59,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 01:13:59,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 01:13:59,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 01:13:59,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:59" (1/1) ... [2023-02-15 01:13:59,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:59" (1/1) ... [2023-02-15 01:13:59,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:59" (1/1) ... [2023-02-15 01:13:59,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:59" (1/1) ... [2023-02-15 01:13:59,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:59" (1/1) ... [2023-02-15 01:13:59,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:59" (1/1) ... [2023-02-15 01:13:59,800 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:59" (1/1) ... [2023-02-15 01:13:59,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:59" (1/1) ... [2023-02-15 01:13:59,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 01:13:59,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 01:13:59,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 01:13:59,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 01:13:59,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:59" (1/1) ... [2023-02-15 01:13:59,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 01:13:59,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:13:59,837 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 01:13:59,839 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 01:13:59,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 01:13:59,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 01:13:59,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 01:13:59,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 01:13:59,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 01:13:59,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 01:13:59,937 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 01:13:59,939 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 01:14:00,107 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 01:14:00,112 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 01:14:00,112 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 01:14:00,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:14:00 BoogieIcfgContainer [2023-02-15 01:14:00,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 01:14:00,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 01:14:00,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 01:14:00,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 01:14:00,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:13:59" (1/3) ... [2023-02-15 01:14:00,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1199ff2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:14:00, skipping insertion in model container [2023-02-15 01:14:00,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:13:59" (2/3) ... [2023-02-15 01:14:00,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1199ff2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:14:00, skipping insertion in model container [2023-02-15 01:14:00,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:14:00" (3/3) ... [2023-02-15 01:14:00,121 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2023-02-15 01:14:00,137 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 01:14:00,137 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-15 01:14:00,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 01:14:00,222 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;@16a2c000, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 01:14:00,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-15 01:14:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 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 01:14:00,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-15 01:14:00,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:00,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-15 01:14:00,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:00,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:00,258 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2023-02-15 01:14:00,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:00,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228983569] [2023-02-15 01:14:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:00,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:00,517 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 01:14:00,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:00,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228983569] [2023-02-15 01:14:00,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228983569] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:14:00,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:14:00,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:14:00,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348663777] [2023-02-15 01:14:00,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:14:00,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:14:00,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:00,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:14:00,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:14:00,567 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 01:14:00,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:00,621 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-02-15 01:14:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:14:00,624 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-02-15 01:14:00,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:00,631 INFO L225 Difference]: With dead ends: 59 [2023-02-15 01:14:00,632 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 01:14:00,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 01:14:00,636 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:00,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:14:00,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 01:14:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2023-02-15 01:14:00,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 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 01:14:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-02-15 01:14:00,663 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2023-02-15 01:14:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:00,664 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-02-15 01:14:00,664 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), 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 01:14:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-02-15 01:14:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 01:14:00,665 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:00,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 01:14:00,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 01:14:00,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:00,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:00,667 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2023-02-15 01:14:00,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:00,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257183537] [2023-02-15 01:14:00,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:00,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:00,718 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 01:14:00,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:00,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257183537] [2023-02-15 01:14:00,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257183537] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:14:00,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:14:00,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:14:00,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084614295] [2023-02-15 01:14:00,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:14:00,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:14:00,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:00,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:14:00,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:14:00,723 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:00,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:00,771 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-02-15 01:14:00,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:14:00,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-15 01:14:00,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:00,773 INFO L225 Difference]: With dead ends: 58 [2023-02-15 01:14:00,773 INFO L226 Difference]: Without dead ends: 58 [2023-02-15 01:14:00,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 01:14:00,775 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:00,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:14:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-15 01:14:00,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2023-02-15 01:14:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 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 01:14:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-15 01:14:00,787 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2023-02-15 01:14:00,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:00,787 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-15 01:14:00,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:00,788 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-15 01:14:00,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 01:14:00,788 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:00,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 01:14:00,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 01:14:00,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:00,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:00,790 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2023-02-15 01:14:00,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:00,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146752592] [2023-02-15 01:14:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:00,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:00,926 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 01:14:00,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:00,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146752592] [2023-02-15 01:14:00,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146752592] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:14:00,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:14:00,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:14:00,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660108545] [2023-02-15 01:14:00,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:14:00,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:14:00,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:00,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:14:00,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:14:00,930 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:00,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:00,973 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-02-15 01:14:00,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:14:00,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-15 01:14:00,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:00,976 INFO L225 Difference]: With dead ends: 32 [2023-02-15 01:14:00,976 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 01:14:00,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 01:14:00,980 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:00,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:14:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 01:14:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-15 01:14:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-02-15 01:14:00,989 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2023-02-15 01:14:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:00,990 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-02-15 01:14:00,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:00,990 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-02-15 01:14:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 01:14:00,991 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:00,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 01:14:00,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 01:14:00,992 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:00,996 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2023-02-15 01:14:00,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:00,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731552131] [2023-02-15 01:14:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:00,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:01,109 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 01:14:01,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:01,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731552131] [2023-02-15 01:14:01,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731552131] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:14:01,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:14:01,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:14:01,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699529194] [2023-02-15 01:14:01,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:14:01,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:14:01,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:01,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:14:01,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:14:01,113 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:01,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:01,186 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-02-15 01:14:01,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 01:14:01,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-15 01:14:01,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:01,187 INFO L225 Difference]: With dead ends: 55 [2023-02-15 01:14:01,187 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 01:14:01,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 01:14:01,189 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:01,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:14:01,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 01:14:01,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2023-02-15 01:14:01,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 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 01:14:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-15 01:14:01,199 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2023-02-15 01:14:01,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:01,199 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-15 01:14:01,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:01,200 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-15 01:14:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 01:14:01,202 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:01,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:01,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 01:14:01,202 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:01,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:01,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2023-02-15 01:14:01,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:01,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252160646] [2023-02-15 01:14:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:01,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:01,291 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 01:14:01,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:01,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252160646] [2023-02-15 01:14:01,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252160646] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:14:01,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:14:01,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:14:01,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392656225] [2023-02-15 01:14:01,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:14:01,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:14:01,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:01,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:14:01,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:14:01,294 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 01:14:01,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:01,343 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2023-02-15 01:14:01,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:14:01,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2023-02-15 01:14:01,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:01,344 INFO L225 Difference]: With dead ends: 60 [2023-02-15 01:14:01,344 INFO L226 Difference]: Without dead ends: 60 [2023-02-15 01:14:01,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 01:14:01,346 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:01,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:14:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-15 01:14:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2023-02-15 01:14:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 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 01:14:01,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-02-15 01:14:01,350 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2023-02-15 01:14:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:01,350 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-02-15 01:14:01,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 01:14:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-02-15 01:14:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 01:14:01,351 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:01,351 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:01,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 01:14:01,351 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:01,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:01,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2023-02-15 01:14:01,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:01,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946622039] [2023-02-15 01:14:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:01,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:14:01,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:01,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946622039] [2023-02-15 01:14:01,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946622039] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:01,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81432409] [2023-02-15 01:14:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:01,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:01,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:01,439 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 01:14:01,441 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 01:14:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:01,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 01:14:01,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:14:01,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:14:01,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81432409] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:01,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:01,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-02-15 01:14:01,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522741301] [2023-02-15 01:14:01,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:01,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:14:01,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:01,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:14:01,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:14:01,638 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 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 01:14:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:01,738 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2023-02-15 01:14:01,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:14:01,738 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 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 10 [2023-02-15 01:14:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:01,740 INFO L225 Difference]: With dead ends: 130 [2023-02-15 01:14:01,741 INFO L226 Difference]: Without dead ends: 130 [2023-02-15 01:14:01,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:14:01,742 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 164 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:01,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 145 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:14:01,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-15 01:14:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2023-02-15 01:14:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 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 01:14:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2023-02-15 01:14:01,749 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2023-02-15 01:14:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:01,749 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2023-02-15 01:14:01,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 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 01:14:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2023-02-15 01:14:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 01:14:01,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:01,750 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:01,758 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 01:14:01,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-15 01:14:01,956 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:01,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:01,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2023-02-15 01:14:01,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:01,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460683800] [2023-02-15 01:14:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:01,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:14:02,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:02,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460683800] [2023-02-15 01:14:02,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460683800] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:02,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865145442] [2023-02-15 01:14:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:02,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:02,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:02,117 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 01:14:02,142 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 01:14:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:02,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 01:14:02,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:02,232 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:14:02,232 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-15 01:14:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:14:02,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:14:02,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865145442] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:02,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:02,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-15 01:14:02,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534973833] [2023-02-15 01:14:02,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:02,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 01:14:02,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:02,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 01:14:02,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:14:02,397 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 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 01:14:02,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:02,605 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2023-02-15 01:14:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 01:14:02,605 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 01:14:02,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:02,610 INFO L225 Difference]: With dead ends: 129 [2023-02-15 01:14:02,610 INFO L226 Difference]: Without dead ends: 129 [2023-02-15 01:14:02,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-02-15 01:14:02,613 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 351 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:02,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 99 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:14:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-15 01:14:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2023-02-15 01:14:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-02-15 01:14:02,633 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2023-02-15 01:14:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:02,634 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-02-15 01:14:02,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 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 01:14:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-02-15 01:14:02,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 01:14:02,635 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:02,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:02,641 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 01:14:02,841 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,SelfDestructingSolverStorable6 [2023-02-15 01:14:02,841 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:02,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:02,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2023-02-15 01:14:02,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:02,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382503590] [2023-02-15 01:14:02,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:02,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:14:02,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:02,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382503590] [2023-02-15 01:14:02,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382503590] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:02,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286789489] [2023-02-15 01:14:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:02,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:02,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:02,901 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 01:14:02,925 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 01:14:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:02,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 01:14:02,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:14:03,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:14:03,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286789489] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:03,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:03,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-15 01:14:03,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102913089] [2023-02-15 01:14:03,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:03,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 01:14:03,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:03,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 01:14:03,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:14:03,047 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 01:14:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:03,184 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2023-02-15 01:14:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 01:14:03,185 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 12 [2023-02-15 01:14:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:03,185 INFO L225 Difference]: With dead ends: 88 [2023-02-15 01:14:03,185 INFO L226 Difference]: Without dead ends: 88 [2023-02-15 01:14:03,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-02-15 01:14:03,186 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:03,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 52 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:14:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-15 01:14:03,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2023-02-15 01:14:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 47 states have internal predecessors, (53), 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 01:14:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-02-15 01:14:03,190 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2023-02-15 01:14:03,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:03,190 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-02-15 01:14:03,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 01:14:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-02-15 01:14:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 01:14:03,191 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:03,191 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:03,204 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 01:14:03,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:03,398 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:03,398 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2023-02-15 01:14:03,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:03,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893529638] [2023-02-15 01:14:03,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:03,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 01:14:03,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:03,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893529638] [2023-02-15 01:14:03,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893529638] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:14:03,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:14:03,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:14:03,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431218582] [2023-02-15 01:14:03,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:14:03,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 01:14:03,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:03,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 01:14:03,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:14:03,514 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:03,532 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2023-02-15 01:14:03,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:14:03,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-15 01:14:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:03,533 INFO L225 Difference]: With dead ends: 46 [2023-02-15 01:14:03,533 INFO L226 Difference]: Without dead ends: 46 [2023-02-15 01:14:03,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 01:14:03,536 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:03,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:14:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-15 01:14:03,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-02-15 01:14:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 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 01:14:03,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-02-15 01:14:03,547 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2023-02-15 01:14:03,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:03,548 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-02-15 01:14:03,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:03,548 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-02-15 01:14:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 01:14:03,549 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:03,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:03,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 01:14:03,549 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:03,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:03,550 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2023-02-15 01:14:03,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:03,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049415612] [2023-02-15 01:14:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:03,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 01:14:03,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:03,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049415612] [2023-02-15 01:14:03,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049415612] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:14:03,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:14:03,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 01:14:03,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191291658] [2023-02-15 01:14:03,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:14:03,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:14:03,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:14:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:14:03,680 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:03,709 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2023-02-15 01:14:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:14:03,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-15 01:14:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:03,711 INFO L225 Difference]: With dead ends: 76 [2023-02-15 01:14:03,711 INFO L226 Difference]: Without dead ends: 76 [2023-02-15 01:14:03,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:14:03,712 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:03,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 46 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:14:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-15 01:14:03,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2023-02-15 01:14:03,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 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 01:14:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2023-02-15 01:14:03,727 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2023-02-15 01:14:03,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:03,727 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2023-02-15 01:14:03,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:03,729 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2023-02-15 01:14:03,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 01:14:03,730 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:03,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:03,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 01:14:03,731 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:03,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:03,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2023-02-15 01:14:03,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:03,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551265900] [2023-02-15 01:14:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:03,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 01:14:03,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:03,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551265900] [2023-02-15 01:14:03,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551265900] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:03,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634243338] [2023-02-15 01:14:03,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:03,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:03,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:03,821 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 01:14:03,845 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 01:14:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:03,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 01:14:03,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 01:14:03,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:04,023 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 23 treesize of output 19 [2023-02-15 01:14:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 01:14:04,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634243338] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:04,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:04,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-15 01:14:04,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470707166] [2023-02-15 01:14:04,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:04,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 01:14:04,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:04,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 01:14:04,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:14:04,082 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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 01:14:04,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:04,162 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2023-02-15 01:14:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 01:14:04,163 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 01:14:04,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:04,163 INFO L225 Difference]: With dead ends: 80 [2023-02-15 01:14:04,163 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 01:14:04,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 01:14:04,164 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:04,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 41 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:14:04,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 01:14:04,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2023-02-15 01:14:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 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 01:14:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2023-02-15 01:14:04,167 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2023-02-15 01:14:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:04,167 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2023-02-15 01:14:04,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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 01:14:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2023-02-15 01:14:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 01:14:04,168 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:04,168 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2023-02-15 01:14:04,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 01:14:04,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:04,374 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:04,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:04,375 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2023-02-15 01:14:04,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:04,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811100731] [2023-02-15 01:14:04,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:04,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:14:04,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:04,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811100731] [2023-02-15 01:14:04,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811100731] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:04,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158591190] [2023-02-15 01:14:04,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 01:14:04,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:04,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:04,481 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 01:14:04,509 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 01:14:04,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 01:14:04,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:14:04,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 01:14:04,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 01:14:04,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:14:04,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158591190] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:14:04,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:14:04,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-02-15 01:14:04,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120117465] [2023-02-15 01:14:04,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:14:04,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:14:04,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:04,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:14:04,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:14:04,627 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 01:14:04,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:04,707 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2023-02-15 01:14:04,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:14:04,707 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 25 [2023-02-15 01:14:04,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:04,708 INFO L225 Difference]: With dead ends: 86 [2023-02-15 01:14:04,708 INFO L226 Difference]: Without dead ends: 86 [2023-02-15 01:14:04,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-02-15 01:14:04,709 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 98 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:04,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 44 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:14:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-15 01:14:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2023-02-15 01:14:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 states have internal predecessors, (66), 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 01:14:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2023-02-15 01:14:04,715 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2023-02-15 01:14:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:04,717 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2023-02-15 01:14:04,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 01:14:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2023-02-15 01:14:04,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 01:14:04,720 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:04,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:04,729 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 01:14:04,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 01:14:04,929 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:04,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:04,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2023-02-15 01:14:04,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:04,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516930597] [2023-02-15 01:14:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:04,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 01:14:05,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:05,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516930597] [2023-02-15 01:14:05,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516930597] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:05,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106452090] [2023-02-15 01:14:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:05,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:05,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:05,018 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 01:14:05,020 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 01:14:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:05,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 01:14:05,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:14:05,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:14:05,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106452090] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:05,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:05,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-02-15 01:14:05,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940168499] [2023-02-15 01:14:05,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:05,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 01:14:05,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:05,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 01:14:05,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:14:05,210 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:05,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:05,391 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2023-02-15 01:14:05,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 01:14:05,392 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-15 01:14:05,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:05,393 INFO L225 Difference]: With dead ends: 152 [2023-02-15 01:14:05,393 INFO L226 Difference]: Without dead ends: 152 [2023-02-15 01:14:05,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2023-02-15 01:14:05,394 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 134 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:05,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 112 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:14:05,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-15 01:14:05,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2023-02-15 01:14:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.2109375) internal successors, (155), 132 states have internal predecessors, (155), 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 01:14:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2023-02-15 01:14:05,398 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 26 [2023-02-15 01:14:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:05,398 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2023-02-15 01:14:05,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:05,398 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2023-02-15 01:14:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 01:14:05,399 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:05,399 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:05,405 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 01:14:05,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:05,605 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:05,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:05,605 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2023-02-15 01:14:05,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:05,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205414738] [2023-02-15 01:14:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:05,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 01:14:05,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:05,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205414738] [2023-02-15 01:14:05,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205414738] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:05,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007336020] [2023-02-15 01:14:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:05,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:05,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:05,778 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 01:14:05,804 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 01:14:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:05,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 01:14:05,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 01:14:05,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 01:14:06,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007336020] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:06,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:06,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-02-15 01:14:06,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286116271] [2023-02-15 01:14:06,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:06,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 01:14:06,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:06,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 01:14:06,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-02-15 01:14:06,017 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 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 01:14:06,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:06,196 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2023-02-15 01:14:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 01:14:06,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 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 34 [2023-02-15 01:14:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:06,197 INFO L225 Difference]: With dead ends: 136 [2023-02-15 01:14:06,197 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 01:14:06,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2023-02-15 01:14:06,198 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:06,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 75 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:14:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 01:14:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2023-02-15 01:14:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.1875) internal successors, (152), 132 states have internal predecessors, (152), 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 01:14:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2023-02-15 01:14:06,217 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 34 [2023-02-15 01:14:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:06,217 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2023-02-15 01:14:06,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 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 01:14:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2023-02-15 01:14:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 01:14:06,220 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:06,221 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:06,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 01:14:06,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:06,426 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:06,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:06,427 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2023-02-15 01:14:06,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:06,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218630514] [2023-02-15 01:14:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:06,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 01:14:06,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:06,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218630514] [2023-02-15 01:14:06,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218630514] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:06,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359791136] [2023-02-15 01:14:06,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 01:14:06,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:06,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:06,674 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 01:14:06,676 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 01:14:06,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 01:14:06,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:14:06,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 01:14:06,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:06,778 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:14:06,779 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-15 01:14:06,792 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 10 treesize of output 8 [2023-02-15 01:14:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 01:14:07,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 01:14:07,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359791136] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:07,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:07,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 10 [2023-02-15 01:14:07,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083977996] [2023-02-15 01:14:07,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:07,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 01:14:07,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:07,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 01:14:07,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-15 01:14:07,202 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 states have internal predecessors, (70), 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 01:14:07,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:07,279 INFO L93 Difference]: Finished difference Result 165 states and 180 transitions. [2023-02-15 01:14:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:14:07,280 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 states have internal predecessors, (70), 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 39 [2023-02-15 01:14:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:07,282 INFO L225 Difference]: With dead ends: 165 [2023-02-15 01:14:07,282 INFO L226 Difference]: Without dead ends: 165 [2023-02-15 01:14:07,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-02-15 01:14:07,284 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 53 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:07,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 84 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:14:07,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-15 01:14:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2023-02-15 01:14:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.1688311688311688) internal successors, (180), 158 states have internal predecessors, (180), 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 01:14:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2023-02-15 01:14:07,288 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 39 [2023-02-15 01:14:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:07,288 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2023-02-15 01:14:07,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 states have internal predecessors, (70), 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 01:14:07,288 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2023-02-15 01:14:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 01:14:07,290 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:07,291 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:07,304 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 01:14:07,497 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,SelfDestructingSolverStorable14 [2023-02-15 01:14:07,497 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:07,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:07,498 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2023-02-15 01:14:07,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:07,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124002562] [2023-02-15 01:14:07,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:07,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 01:14:07,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:07,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124002562] [2023-02-15 01:14:07,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124002562] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:07,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33059857] [2023-02-15 01:14:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:07,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:07,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:07,684 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 01:14:07,693 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 01:14:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:07,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 01:14:07,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 01:14:07,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 01:14:07,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33059857] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:07,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:07,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 16 [2023-02-15 01:14:07,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827438889] [2023-02-15 01:14:07,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:07,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 01:14:07,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:07,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 01:14:07,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-02-15 01:14:07,934 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 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 01:14:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:08,166 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2023-02-15 01:14:08,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 01:14:08,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 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 42 [2023-02-15 01:14:08,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:08,167 INFO L225 Difference]: With dead ends: 159 [2023-02-15 01:14:08,167 INFO L226 Difference]: Without dead ends: 159 [2023-02-15 01:14:08,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-02-15 01:14:08,168 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 160 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:08,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 93 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:14:08,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-15 01:14:08,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2023-02-15 01:14:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.1496598639455782) internal successors, (169), 151 states have internal predecessors, (169), 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 01:14:08,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 169 transitions. [2023-02-15 01:14:08,171 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 169 transitions. Word has length 42 [2023-02-15 01:14:08,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:08,172 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 169 transitions. [2023-02-15 01:14:08,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 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 01:14:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 169 transitions. [2023-02-15 01:14:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 01:14:08,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:08,173 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2023-02-15 01:14:08,181 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 01:14:08,373 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,SelfDestructingSolverStorable15 [2023-02-15 01:14:08,373 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:08,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:08,374 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2023-02-15 01:14:08,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:08,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736856770] [2023-02-15 01:14:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:08,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 117 proven. 102 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 01:14:08,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:08,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736856770] [2023-02-15 01:14:08,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736856770] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:08,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150684160] [2023-02-15 01:14:08,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 01:14:08,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:08,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:08,619 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 01:14:08,621 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 01:14:08,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 01:14:08,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:14:08,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 01:14:08,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 01:14:08,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 01:14:09,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150684160] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:09,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:09,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 20 [2023-02-15 01:14:09,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166367288] [2023-02-15 01:14:09,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:09,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 01:14:09,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 01:14:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-02-15 01:14:09,007 INFO L87 Difference]: Start difference. First operand 152 states and 169 transitions. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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 01:14:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:09,606 INFO L93 Difference]: Finished difference Result 312 states and 328 transitions. [2023-02-15 01:14:09,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 01:14:09,607 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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 64 [2023-02-15 01:14:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:09,608 INFO L225 Difference]: With dead ends: 312 [2023-02-15 01:14:09,608 INFO L226 Difference]: Without dead ends: 312 [2023-02-15 01:14:09,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=1381, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 01:14:09,609 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 532 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:09,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 150 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:14:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-02-15 01:14:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 207. [2023-02-15 01:14:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.113861386138614) internal successors, (225), 206 states have internal predecessors, (225), 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 01:14:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 225 transitions. [2023-02-15 01:14:09,615 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 225 transitions. Word has length 64 [2023-02-15 01:14:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:09,615 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 225 transitions. [2023-02-15 01:14:09,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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 01:14:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 225 transitions. [2023-02-15 01:14:09,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-15 01:14:09,616 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:09,617 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-15 01:14:09,625 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 01:14:09,822 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,SelfDestructingSolverStorable16 [2023-02-15 01:14:09,823 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:09,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:09,823 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2023-02-15 01:14:09,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:09,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862144155] [2023-02-15 01:14:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:09,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 01:14:10,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:10,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862144155] [2023-02-15 01:14:10,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862144155] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:10,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608602284] [2023-02-15 01:14:10,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 01:14:10,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:10,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:10,021 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 01:14:10,025 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 01:14:10,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 01:14:10,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:14:10,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 01:14:10,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 01:14:10,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 01:14:10,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608602284] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:10,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:10,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-02-15 01:14:10,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077909983] [2023-02-15 01:14:10,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:10,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 01:14:10,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:10,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 01:14:10,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-02-15 01:14:10,279 INFO L87 Difference]: Start difference. First operand 207 states and 225 transitions. Second operand has 13 states, 12 states have (on average 5.25) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:10,610 INFO L93 Difference]: Finished difference Result 492 states and 574 transitions. [2023-02-15 01:14:10,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 01:14:10,610 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.25) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-02-15 01:14:10,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:10,612 INFO L225 Difference]: With dead ends: 492 [2023-02-15 01:14:10,612 INFO L226 Difference]: Without dead ends: 492 [2023-02-15 01:14:10,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2023-02-15 01:14:10,613 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 456 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:10,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 309 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:14:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-02-15 01:14:10,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 265. [2023-02-15 01:14:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.1730769230769231) internal successors, (305), 264 states have internal predecessors, (305), 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 01:14:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 305 transitions. [2023-02-15 01:14:10,620 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 305 transitions. Word has length 91 [2023-02-15 01:14:10,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:10,620 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 305 transitions. [2023-02-15 01:14:10,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.25) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:14:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 305 transitions. [2023-02-15 01:14:10,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-15 01:14:10,621 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:10,621 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:10,630 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 01:14:10,828 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,SelfDestructingSolverStorable17 [2023-02-15 01:14:10,828 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:10,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1874012467, now seen corresponding path program 2 times [2023-02-15 01:14:10,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:10,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651358419] [2023-02-15 01:14:10,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:10,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 256 proven. 77 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-15 01:14:11,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:11,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651358419] [2023-02-15 01:14:11,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651358419] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:11,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612598341] [2023-02-15 01:14:11,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 01:14:11,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:11,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:11,129 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 01:14:11,157 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 01:14:11,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 01:14:11,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:14:11,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 01:14:11,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:11,835 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_350 Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_16| Int) (v_ArrVal_349 Int) (v_ArrVal_348 Int) (|v_ULTIMATE.start_main_~#b~0#1.base_21| Int)) (and (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_21| v_ArrVal_350) |v_ULTIMATE.start_main_~#mask~0#1.base_16| v_ArrVal_349) |v_ULTIMATE.start_main_~#b~0#1.base_21| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_16| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_21| v_ArrVal_348) |v_ULTIMATE.start_main_~#mask~0#1.base_16|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_21|) 0))) is different from true [2023-02-15 01:14:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2023-02-15 01:14:11,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:14:11,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612598341] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:14:11,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:14:11,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2023-02-15 01:14:11,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856261684] [2023-02-15 01:14:11,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:14:11,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:14:11,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:11,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:14:11,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-02-15 01:14:11,838 INFO L87 Difference]: Start difference. First operand 265 states and 305 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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 01:14:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:11,855 INFO L93 Difference]: Finished difference Result 266 states and 305 transitions. [2023-02-15 01:14:11,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:14:11,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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 92 [2023-02-15 01:14:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:11,857 INFO L225 Difference]: With dead ends: 266 [2023-02-15 01:14:11,857 INFO L226 Difference]: Without dead ends: 264 [2023-02-15 01:14:11,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-02-15 01:14:11,858 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:11,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2023-02-15 01:14:11,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-02-15 01:14:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2023-02-15 01:14:11,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.1583011583011582) internal successors, (300), 263 states have internal predecessors, (300), 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 01:14:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 300 transitions. [2023-02-15 01:14:11,862 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 300 transitions. Word has length 92 [2023-02-15 01:14:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:11,862 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 300 transitions. [2023-02-15 01:14:11,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 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 01:14:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 300 transitions. [2023-02-15 01:14:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-15 01:14:11,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:11,863 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-15 01:14:11,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 01:14:12,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:12,077 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:12,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2023-02-15 01:14:12,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:12,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93943414] [2023-02-15 01:14:12,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:12,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 01:14:12,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:12,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93943414] [2023-02-15 01:14:12,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93943414] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:12,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581514817] [2023-02-15 01:14:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:12,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:12,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:12,449 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:14:12,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 01:14:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:12,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 01:14:12,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:12,587 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:14:12,588 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-15 01:14:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 01:14:12,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:13,289 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 01:14:13,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581514817] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:13,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:13,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-02-15 01:14:13,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756030298] [2023-02-15 01:14:13,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:13,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 01:14:13,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:13,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 01:14:13,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-15 01:14:13,291 INFO L87 Difference]: Start difference. First operand 264 states and 300 transitions. Second operand has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 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 01:14:13,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:13,866 INFO L93 Difference]: Finished difference Result 481 states and 526 transitions. [2023-02-15 01:14:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 01:14:13,867 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 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 92 [2023-02-15 01:14:13,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:13,869 INFO L225 Difference]: With dead ends: 481 [2023-02-15 01:14:13,869 INFO L226 Difference]: Without dead ends: 481 [2023-02-15 01:14:13,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2023-02-15 01:14:13,870 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 458 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:13,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 215 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:14:13,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2023-02-15 01:14:13,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 266. [2023-02-15 01:14:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.1187739463601531) internal successors, (292), 265 states have internal predecessors, (292), 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 01:14:13,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 292 transitions. [2023-02-15 01:14:13,877 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 292 transitions. Word has length 92 [2023-02-15 01:14:13,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:13,878 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 292 transitions. [2023-02-15 01:14:13,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 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 01:14:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 292 transitions. [2023-02-15 01:14:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-15 01:14:13,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:13,879 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:13,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 01:14:14,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-02-15 01:14:14,085 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:14,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:14,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2035033164, now seen corresponding path program 1 times [2023-02-15 01:14:14,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:14,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439737347] [2023-02-15 01:14:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:14,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 256 proven. 77 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 01:14:14,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:14,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439737347] [2023-02-15 01:14:14,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439737347] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:14,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682799372] [2023-02-15 01:14:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:14,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:14,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:14,377 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:14:14,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 01:14:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:14,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 01:14:14,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 210 proven. 106 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 01:14:14,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 210 proven. 106 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 01:14:14,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682799372] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:14,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:14,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 21 [2023-02-15 01:14:14,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124324465] [2023-02-15 01:14:14,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:14,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 01:14:14,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:14,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 01:14:14,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-02-15 01:14:14,726 INFO L87 Difference]: Start difference. First operand 266 states and 292 transitions. Second operand has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 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 01:14:15,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:15,183 INFO L93 Difference]: Finished difference Result 210 states and 228 transitions. [2023-02-15 01:14:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 01:14:15,183 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 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 93 [2023-02-15 01:14:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:15,184 INFO L225 Difference]: With dead ends: 210 [2023-02-15 01:14:15,184 INFO L226 Difference]: Without dead ends: 210 [2023-02-15 01:14:15,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 01:14:15,185 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 92 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:15,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 86 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:14:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-02-15 01:14:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2023-02-15 01:14:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.1176470588235294) internal successors, (228), 208 states have internal predecessors, (228), 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 01:14:15,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 228 transitions. [2023-02-15 01:14:15,189 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 228 transitions. Word has length 93 [2023-02-15 01:14:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:15,190 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 228 transitions. [2023-02-15 01:14:15,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 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 01:14:15,190 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 228 transitions. [2023-02-15 01:14:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-15 01:14:15,191 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:15,191 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:15,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 01:14:15,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:15,397 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:15,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:15,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1008958684, now seen corresponding path program 2 times [2023-02-15 01:14:15,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:15,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595894207] [2023-02-15 01:14:15,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:15,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 279 proven. 140 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-02-15 01:14:15,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:15,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595894207] [2023-02-15 01:14:15,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595894207] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:15,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605607941] [2023-02-15 01:14:15,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 01:14:15,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:15,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:15,745 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:14:15,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 01:14:15,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 01:14:15,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:14:15,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 01:14:15,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 191 proven. 238 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-15 01:14:16,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 191 proven. 238 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-15 01:14:16,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605607941] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:16,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:16,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2023-02-15 01:14:16,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017014699] [2023-02-15 01:14:16,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:16,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 01:14:16,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:16,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 01:14:16,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2023-02-15 01:14:16,263 INFO L87 Difference]: Start difference. First operand 209 states and 228 transitions. Second operand has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 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 01:14:16,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:16,966 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2023-02-15 01:14:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 01:14:16,967 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 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 103 [2023-02-15 01:14:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:16,968 INFO L225 Difference]: With dead ends: 211 [2023-02-15 01:14:16,968 INFO L226 Difference]: Without dead ends: 211 [2023-02-15 01:14:16,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 192 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=396, Invalid=1496, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 01:14:16,969 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:16,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 86 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 01:14:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-02-15 01:14:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2023-02-15 01:14:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.107843137254902) internal successors, (226), 208 states have internal predecessors, (226), 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 01:14:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 226 transitions. [2023-02-15 01:14:16,973 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 226 transitions. Word has length 103 [2023-02-15 01:14:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:16,973 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 226 transitions. [2023-02-15 01:14:16,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 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 01:14:16,974 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 226 transitions. [2023-02-15 01:14:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-15 01:14:16,974 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:16,974 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:16,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 01:14:17,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:17,181 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:17,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:17,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1018520203, now seen corresponding path program 3 times [2023-02-15 01:14:17,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:17,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606911507] [2023-02-15 01:14:17,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:17,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 293 proven. 142 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-15 01:14:17,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:17,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606911507] [2023-02-15 01:14:17,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606911507] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:17,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628101416] [2023-02-15 01:14:17,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 01:14:17,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:17,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:17,555 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:14:17,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 01:14:17,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 01:14:17,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:14:17,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 01:14:17,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:17,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:14:17,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-15 01:14:17,650 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 10 treesize of output 8 [2023-02-15 01:14:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2023-02-15 01:14:18,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2023-02-15 01:14:18,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628101416] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:18,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:18,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 18 [2023-02-15 01:14:18,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596923393] [2023-02-15 01:14:18,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:18,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 01:14:18,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:18,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 01:14:18,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-02-15 01:14:18,348 INFO L87 Difference]: Start difference. First operand 209 states and 226 transitions. Second operand has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 states have internal predecessors, (103), 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 01:14:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:19,245 INFO L93 Difference]: Finished difference Result 279 states and 300 transitions. [2023-02-15 01:14:19,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 01:14:19,246 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 states have internal predecessors, (103), 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 108 [2023-02-15 01:14:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:19,247 INFO L225 Difference]: With dead ends: 279 [2023-02-15 01:14:19,247 INFO L226 Difference]: Without dead ends: 279 [2023-02-15 01:14:19,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=454, Invalid=1616, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 01:14:19,248 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 358 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:19,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 65 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 01:14:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-02-15 01:14:19,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 273. [2023-02-15 01:14:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.1119402985074627) internal successors, (298), 272 states have internal predecessors, (298), 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 01:14:19,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 298 transitions. [2023-02-15 01:14:19,253 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 298 transitions. Word has length 108 [2023-02-15 01:14:19,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:19,253 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 298 transitions. [2023-02-15 01:14:19,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 states have internal predecessors, (103), 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 01:14:19,253 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 298 transitions. [2023-02-15 01:14:19,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-15 01:14:19,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:19,254 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:14:19,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 01:14:19,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-15 01:14:19,460 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:19,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1286679423, now seen corresponding path program 1 times [2023-02-15 01:14:19,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:19,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977552157] [2023-02-15 01:14:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:19,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2023-02-15 01:14:19,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:19,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977552157] [2023-02-15 01:14:19,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977552157] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:19,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869434118] [2023-02-15 01:14:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:19,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:19,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:19,689 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:14:19,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 01:14:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:19,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 01:14:19,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 498 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-15 01:14:20,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 17 proven. 481 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-15 01:14:20,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869434118] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:20,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:20,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 23 [2023-02-15 01:14:20,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216667725] [2023-02-15 01:14:20,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:20,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 01:14:20,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 01:14:20,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2023-02-15 01:14:20,449 INFO L87 Difference]: Start difference. First operand 273 states and 298 transitions. Second operand has 23 states, 23 states have (on average 7.869565217391305) internal successors, (181), 23 states have internal predecessors, (181), 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 01:14:21,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:21,144 INFO L93 Difference]: Finished difference Result 551 states and 594 transitions. [2023-02-15 01:14:21,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 01:14:21,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.869565217391305) internal successors, (181), 23 states have internal predecessors, (181), 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 121 [2023-02-15 01:14:21,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:21,147 INFO L225 Difference]: With dead ends: 551 [2023-02-15 01:14:21,147 INFO L226 Difference]: Without dead ends: 551 [2023-02-15 01:14:21,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2023-02-15 01:14:21,148 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 342 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:21,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 342 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 01:14:21,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-02-15 01:14:21,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 531. [2023-02-15 01:14:21,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 526 states have (on average 1.129277566539924) internal successors, (594), 530 states have internal predecessors, (594), 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 01:14:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 594 transitions. [2023-02-15 01:14:21,156 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 594 transitions. Word has length 121 [2023-02-15 01:14:21,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:21,156 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 594 transitions. [2023-02-15 01:14:21,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.869565217391305) internal successors, (181), 23 states have internal predecessors, (181), 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 01:14:21,157 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 594 transitions. [2023-02-15 01:14:21,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-15 01:14:21,157 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:21,158 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-15 01:14:21,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-15 01:14:21,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:21,364 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:21,364 INFO L85 PathProgramCache]: Analyzing trace with hash 129325764, now seen corresponding path program 4 times [2023-02-15 01:14:21,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:21,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967699021] [2023-02-15 01:14:21,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:21,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 613 proven. 295 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-15 01:14:21,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:21,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967699021] [2023-02-15 01:14:21,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967699021] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:21,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921660102] [2023-02-15 01:14:21,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 01:14:21,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:21,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:21,864 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:14:21,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 01:14:22,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 01:14:22,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:14:22,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 01:14:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-15 01:14:22,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-15 01:14:22,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921660102] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:22,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:22,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 43 [2023-02-15 01:14:22,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475066356] [2023-02-15 01:14:22,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:22,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 01:14:22,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:22,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 01:14:22,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1382, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 01:14:22,750 INFO L87 Difference]: Start difference. First operand 531 states and 594 transitions. Second operand has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 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 01:14:24,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:24,360 INFO L93 Difference]: Finished difference Result 472 states and 503 transitions. [2023-02-15 01:14:24,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-15 01:14:24,360 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 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 121 [2023-02-15 01:14:24,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:24,362 INFO L225 Difference]: With dead ends: 472 [2023-02-15 01:14:24,362 INFO L226 Difference]: Without dead ends: 472 [2023-02-15 01:14:24,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 218 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3969 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2307, Invalid=9035, Unknown=0, NotChecked=0, Total=11342 [2023-02-15 01:14:24,365 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 587 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:24,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 131 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 01:14:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2023-02-15 01:14:24,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 466. [2023-02-15 01:14:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 461 states have (on average 1.0911062906724511) internal successors, (503), 465 states have internal predecessors, (503), 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 01:14:24,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 503 transitions. [2023-02-15 01:14:24,372 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 503 transitions. Word has length 121 [2023-02-15 01:14:24,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:24,372 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 503 transitions. [2023-02-15 01:14:24,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 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 01:14:24,372 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 503 transitions. [2023-02-15 01:14:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-02-15 01:14:24,373 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:24,373 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1] [2023-02-15 01:14:24,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 01:14:24,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:24,579 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:24,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:24,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1239811749, now seen corresponding path program 3 times [2023-02-15 01:14:24,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:24,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509762360] [2023-02-15 01:14:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:24,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1112 proven. 218 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-02-15 01:14:25,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:25,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509762360] [2023-02-15 01:14:25,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509762360] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:25,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981946263] [2023-02-15 01:14:25,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 01:14:25,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:25,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:25,077 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:14:25,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 01:14:25,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 01:14:25,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:14:25,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 01:14:25,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:25,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:14:25,188 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:14:25,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-15 01:14:25,197 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 10 treesize of output 8 [2023-02-15 01:14:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 13 proven. 552 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2023-02-15 01:14:26,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 565 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2023-02-15 01:14:27,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981946263] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:27,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:27,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 30 [2023-02-15 01:14:27,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664256205] [2023-02-15 01:14:27,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:27,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 01:14:27,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:27,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 01:14:27,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-02-15 01:14:27,253 INFO L87 Difference]: Start difference. First operand 466 states and 503 transitions. Second operand has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 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 01:14:30,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:30,071 INFO L93 Difference]: Finished difference Result 465 states and 492 transitions. [2023-02-15 01:14:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-15 01:14:30,072 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 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 162 [2023-02-15 01:14:30,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:30,073 INFO L225 Difference]: With dead ends: 465 [2023-02-15 01:14:30,073 INFO L226 Difference]: Without dead ends: 465 [2023-02-15 01:14:30,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1262, Invalid=4140, Unknown=0, NotChecked=0, Total=5402 [2023-02-15 01:14:30,075 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 222 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:30,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 121 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 01:14:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-02-15 01:14:30,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 465. [2023-02-15 01:14:30,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 461 states have (on average 1.0672451193058567) internal successors, (492), 464 states have internal predecessors, (492), 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 01:14:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 492 transitions. [2023-02-15 01:14:30,083 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 492 transitions. Word has length 162 [2023-02-15 01:14:30,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:30,083 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 492 transitions. [2023-02-15 01:14:30,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 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 01:14:30,084 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 492 transitions. [2023-02-15 01:14:30,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-02-15 01:14:30,086 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:30,086 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 48, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-15 01:14:30,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 01:14:30,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:30,287 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:30,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:30,287 INFO L85 PathProgramCache]: Analyzing trace with hash 763391400, now seen corresponding path program 5 times [2023-02-15 01:14:30,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:30,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518979612] [2023-02-15 01:14:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:30,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4200 proven. 311 refuted. 0 times theorem prover too weak. 1821 trivial. 0 not checked. [2023-02-15 01:14:31,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:31,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518979612] [2023-02-15 01:14:31,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518979612] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:31,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348944091] [2023-02-15 01:14:31,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 01:14:31,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:31,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:31,077 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:14:31,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 01:14:31,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-15 01:14:31,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:14:31,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 01:14:31,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4038 proven. 852 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2023-02-15 01:14:31,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4223 proven. 667 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2023-02-15 01:14:32,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348944091] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:32,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:32,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 41 [2023-02-15 01:14:32,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056178394] [2023-02-15 01:14:32,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:32,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-15 01:14:32,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:32,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-15 01:14:32,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 01:14:32,322 INFO L87 Difference]: Start difference. First operand 465 states and 492 transitions. Second operand has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 states have internal predecessors, (225), 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 01:14:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:33,515 INFO L93 Difference]: Finished difference Result 465 states and 487 transitions. [2023-02-15 01:14:33,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 01:14:33,515 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 states have internal predecessors, (225), 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 301 [2023-02-15 01:14:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:33,517 INFO L225 Difference]: With dead ends: 465 [2023-02-15 01:14:33,517 INFO L226 Difference]: Without dead ends: 465 [2023-02-15 01:14:33,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 576 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1138, Invalid=4412, Unknown=0, NotChecked=0, Total=5550 [2023-02-15 01:14:33,519 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 119 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:33,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 254 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 01:14:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-02-15 01:14:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 465. [2023-02-15 01:14:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 461 states have (on average 1.0563991323210413) internal successors, (487), 464 states have internal predecessors, (487), 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 01:14:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 487 transitions. [2023-02-15 01:14:33,525 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 487 transitions. Word has length 301 [2023-02-15 01:14:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:33,526 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 487 transitions. [2023-02-15 01:14:33,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 states have internal predecessors, (225), 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 01:14:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 487 transitions. [2023-02-15 01:14:33,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-02-15 01:14:33,529 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:33,529 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 51, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-15 01:14:33,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 01:14:33,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-15 01:14:33,738 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:33,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:33,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1134310783, now seen corresponding path program 6 times [2023-02-15 01:14:33,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:33,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741289540] [2023-02-15 01:14:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:33,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4815 proven. 419 refuted. 0 times theorem prover too weak. 1863 trivial. 0 not checked. [2023-02-15 01:14:34,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:34,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741289540] [2023-02-15 01:14:34,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741289540] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:34,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113278708] [2023-02-15 01:14:34,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 01:14:34,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:34,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:34,616 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:14:34,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 01:14:36,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-02-15 01:14:36,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:14:36,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 01:14:36,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 5041 proven. 1392 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2023-02-15 01:14:36,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 5041 proven. 1392 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2023-02-15 01:14:37,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113278708] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:37,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:37,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 43 [2023-02-15 01:14:37,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804641584] [2023-02-15 01:14:37,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:37,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 01:14:37,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:37,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 01:14:37,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1492, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 01:14:37,408 INFO L87 Difference]: Start difference. First operand 465 states and 487 transitions. Second operand has 43 states, 43 states have (on average 6.348837209302325) internal successors, (273), 43 states have internal predecessors, (273), 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 01:14:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:39,612 INFO L93 Difference]: Finished difference Result 571 states and 584 transitions. [2023-02-15 01:14:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-15 01:14:39,612 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.348837209302325) internal successors, (273), 43 states have internal predecessors, (273), 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 316 [2023-02-15 01:14:39,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:39,614 INFO L225 Difference]: With dead ends: 571 [2023-02-15 01:14:39,614 INFO L226 Difference]: Without dead ends: 571 [2023-02-15 01:14:39,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 603 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1716, Invalid=7026, Unknown=0, NotChecked=0, Total=8742 [2023-02-15 01:14:39,616 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 146 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 3551 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 3574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:39,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 212 Invalid, 3574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3551 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 01:14:39,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2023-02-15 01:14:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 559. [2023-02-15 01:14:39,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 555 states have (on average 1.0342342342342343) internal successors, (574), 558 states have internal predecessors, (574), 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 01:14:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 574 transitions. [2023-02-15 01:14:39,623 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 574 transitions. Word has length 316 [2023-02-15 01:14:39,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:39,623 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 574 transitions. [2023-02-15 01:14:39,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.348837209302325) internal successors, (273), 43 states have internal predecessors, (273), 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 01:14:39,624 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 574 transitions. [2023-02-15 01:14:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-02-15 01:14:39,627 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:39,627 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 54, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-15 01:14:39,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 01:14:39,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-15 01:14:39,835 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:39,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1065134024, now seen corresponding path program 7 times [2023-02-15 01:14:39,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:39,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872432152] [2023-02-15 01:14:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:39,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 3828 proven. 705 refuted. 0 times theorem prover too weak. 3374 trivial. 0 not checked. [2023-02-15 01:14:40,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:40,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872432152] [2023-02-15 01:14:40,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872432152] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:40,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455139728] [2023-02-15 01:14:40,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 01:14:40,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:40,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:40,853 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:14:40,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 01:14:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:41,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 01:14:41,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 289 proven. 6974 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2023-02-15 01:14:41,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 289 proven. 6974 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2023-02-15 01:14:42,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455139728] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:42,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:42,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 22] total 44 [2023-02-15 01:14:42,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623809160] [2023-02-15 01:14:42,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:42,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 01:14:42,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:42,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 01:14:42,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1548, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 01:14:42,347 INFO L87 Difference]: Start difference. First operand 559 states and 574 transitions. Second operand has 44 states, 44 states have (on average 6.113636363636363) internal successors, (269), 44 states have internal predecessors, (269), 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 01:14:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:44,532 INFO L93 Difference]: Finished difference Result 625 states and 633 transitions. [2023-02-15 01:14:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-02-15 01:14:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.113636363636363) internal successors, (269), 44 states have internal predecessors, (269), 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 331 [2023-02-15 01:14:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:44,534 INFO L225 Difference]: With dead ends: 625 [2023-02-15 01:14:44,535 INFO L226 Difference]: Without dead ends: 625 [2023-02-15 01:14:44,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 627 SyntacticMatches, 19 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6732 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3388, Invalid=16634, Unknown=0, NotChecked=0, Total=20022 [2023-02-15 01:14:44,538 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1028 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:44,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 221 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 01:14:44,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-02-15 01:14:44,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 506. [2023-02-15 01:14:44,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 502 states have (on average 1.0278884462151394) internal successors, (516), 505 states have internal predecessors, (516), 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 01:14:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 516 transitions. [2023-02-15 01:14:44,545 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 516 transitions. Word has length 331 [2023-02-15 01:14:44,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:44,546 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 516 transitions. [2023-02-15 01:14:44,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.113636363636363) internal successors, (269), 44 states have internal predecessors, (269), 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 01:14:44,546 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 516 transitions. [2023-02-15 01:14:44,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-02-15 01:14:44,548 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:44,548 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-15 01:14:44,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 01:14:44,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-15 01:14:44,756 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1903304557, now seen corresponding path program 8 times [2023-02-15 01:14:44,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:44,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124809924] [2023-02-15 01:14:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:44,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-15 01:14:45,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:45,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124809924] [2023-02-15 01:14:45,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124809924] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:45,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021259300] [2023-02-15 01:14:45,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 01:14:45,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:45,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:45,365 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:14:45,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 01:14:45,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 01:14:45,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:14:45,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 01:14:45,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-15 01:14:45,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-15 01:14:46,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021259300] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:46,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:46,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-02-15 01:14:46,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315973933] [2023-02-15 01:14:46,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:46,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 01:14:46,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:46,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 01:14:46,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2023-02-15 01:14:46,108 INFO L87 Difference]: Start difference. First operand 506 states and 516 transitions. Second operand has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 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 01:14:49,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:49,007 INFO L93 Difference]: Finished difference Result 1246 states and 1332 transitions. [2023-02-15 01:14:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 01:14:49,008 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 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 388 [2023-02-15 01:14:49,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:49,011 INFO L225 Difference]: With dead ends: 1246 [2023-02-15 01:14:49,012 INFO L226 Difference]: Without dead ends: 1246 [2023-02-15 01:14:49,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 772 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 01:14:49,013 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 1707 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:49,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1707 Valid, 819 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 01:14:49,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2023-02-15 01:14:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 565. [2023-02-15 01:14:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 561 states have (on average 1.0659536541889483) internal successors, (598), 564 states have internal predecessors, (598), 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 01:14:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 598 transitions. [2023-02-15 01:14:49,023 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 598 transitions. Word has length 388 [2023-02-15 01:14:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:49,024 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 598 transitions. [2023-02-15 01:14:49,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 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 01:14:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 598 transitions. [2023-02-15 01:14:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-02-15 01:14:49,026 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:49,026 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-15 01:14:49,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-15 01:14:49,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:49,234 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:49,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:49,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1127100931, now seen corresponding path program 2 times [2023-02-15 01:14:49,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:49,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960000462] [2023-02-15 01:14:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:49,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-15 01:14:50,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:50,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960000462] [2023-02-15 01:14:50,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960000462] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:50,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530547237] [2023-02-15 01:14:50,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 01:14:50,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:50,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:50,241 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:14:50,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 01:14:50,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 01:14:50,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:14:50,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-15 01:14:50,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:50,545 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:14:50,545 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-15 01:14:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-15 01:14:51,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-15 01:14:52,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530547237] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:52,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:52,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2023-02-15 01:14:52,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930488474] [2023-02-15 01:14:52,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:52,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 01:14:52,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 01:14:52,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 01:14:52,798 INFO L87 Difference]: Start difference. First operand 565 states and 598 transitions. Second operand has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 states have internal predecessors, (184), 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 01:14:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:14:54,353 INFO L93 Difference]: Finished difference Result 1236 states and 1322 transitions. [2023-02-15 01:14:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 01:14:54,353 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 states have internal predecessors, (184), 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 389 [2023-02-15 01:14:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:14:54,356 INFO L225 Difference]: With dead ends: 1236 [2023-02-15 01:14:54,356 INFO L226 Difference]: Without dead ends: 1236 [2023-02-15 01:14:54,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 755 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1288, Invalid=3268, Unknown=0, NotChecked=0, Total=4556 [2023-02-15 01:14:54,357 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1598 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1598 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 01:14:54,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1598 Valid, 767 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 01:14:54,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2023-02-15 01:14:54,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 566. [2023-02-15 01:14:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 562 states have (on average 1.0462633451957295) internal successors, (588), 565 states have internal predecessors, (588), 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 01:14:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 588 transitions. [2023-02-15 01:14:54,366 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 588 transitions. Word has length 389 [2023-02-15 01:14:54,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:14:54,367 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 588 transitions. [2023-02-15 01:14:54,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 states have internal predecessors, (184), 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 01:14:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 588 transitions. [2023-02-15 01:14:54,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2023-02-15 01:14:54,369 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:14:54,369 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 62, 10, 10, 10, 10, 10, 10, 10, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2023-02-15 01:14:54,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-15 01:14:54,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:54,576 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:14:54,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:14:54,577 INFO L85 PathProgramCache]: Analyzing trace with hash -788499985, now seen corresponding path program 4 times [2023-02-15 01:14:54,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:14:54,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259583305] [2023-02-15 01:14:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:14:54,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:14:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:14:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 6654 proven. 1334 refuted. 0 times theorem prover too weak. 2462 trivial. 0 not checked. [2023-02-15 01:14:55,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:14:55,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259583305] [2023-02-15 01:14:55,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259583305] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:14:55,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315681930] [2023-02-15 01:14:55,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 01:14:55,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:14:55,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:14:55,841 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:14:55,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-15 01:14:56,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 01:14:56,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:14:56,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 01:14:56,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:14:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 9350 proven. 78 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2023-02-15 01:14:57,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:14:57,332 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 9 treesize of output 7 [2023-02-15 01:14:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 9350 proven. 78 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2023-02-15 01:14:57,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315681930] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:14:57,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:14:57,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 19] total 52 [2023-02-15 01:14:57,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867713748] [2023-02-15 01:14:57,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:14:57,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 01:14:57,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:14:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 01:14:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2296, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 01:14:57,873 INFO L87 Difference]: Start difference. First operand 566 states and 588 transitions. Second operand has 52 states, 52 states have (on average 6.730769230769231) internal successors, (350), 52 states have internal predecessors, (350), 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 01:15:02,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:15:02,212 INFO L93 Difference]: Finished difference Result 622 states and 649 transitions. [2023-02-15 01:15:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-02-15 01:15:02,213 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.730769230769231) internal successors, (350), 52 states have internal predecessors, (350), 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 406 [2023-02-15 01:15:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:15:02,214 INFO L225 Difference]: With dead ends: 622 [2023-02-15 01:15:02,214 INFO L226 Difference]: Without dead ends: 622 [2023-02-15 01:15:02,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 945 GetRequests, 792 SyntacticMatches, 6 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6574 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3084, Invalid=18968, Unknown=0, NotChecked=0, Total=22052 [2023-02-15 01:15:02,217 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2459 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 5048 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2459 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 5143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 5048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-15 01:15:02,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2459 Valid, 307 Invalid, 5143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 5048 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-15 01:15:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2023-02-15 01:15:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 504. [2023-02-15 01:15:02,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.036) internal successors, (518), 503 states have internal predecessors, (518), 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 01:15:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 518 transitions. [2023-02-15 01:15:02,225 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 518 transitions. Word has length 406 [2023-02-15 01:15:02,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:15:02,226 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 518 transitions. [2023-02-15 01:15:02,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.730769230769231) internal successors, (350), 52 states have internal predecessors, (350), 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 01:15:02,226 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 518 transitions. [2023-02-15 01:15:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-02-15 01:15:02,228 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:15:02,228 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 64, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-02-15 01:15:02,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-15 01:15:02,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-15 01:15:02,438 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:15:02,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:15:02,439 INFO L85 PathProgramCache]: Analyzing trace with hash -120695514, now seen corresponding path program 5 times [2023-02-15 01:15:02,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:15:02,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800362517] [2023-02-15 01:15:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:15:02,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:15:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:15:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11245 backedges. 4926 proven. 833 refuted. 0 times theorem prover too weak. 5486 trivial. 0 not checked. [2023-02-15 01:15:03,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:15:03,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800362517] [2023-02-15 01:15:03,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800362517] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:15:03,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063637474] [2023-02-15 01:15:03,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 01:15:03,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:15:03,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:15:03,713 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:15:03,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-15 01:15:08,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-02-15 01:15:08,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:15:08,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 01:15:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:15:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11245 backedges. 6585 proven. 3571 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2023-02-15 01:15:09,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:15:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11245 backedges. 7345 proven. 2811 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2023-02-15 01:15:09,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063637474] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:15:09,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:15:09,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 62 [2023-02-15 01:15:09,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994389651] [2023-02-15 01:15:09,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:15:09,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-15 01:15:09,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:15:09,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-15 01:15:09,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=3141, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 01:15:09,877 INFO L87 Difference]: Start difference. First operand 504 states and 518 transitions. Second operand has 62 states, 62 states have (on average 5.645161290322581) internal successors, (350), 62 states have internal predecessors, (350), 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 01:15:13,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:15:13,058 INFO L93 Difference]: Finished difference Result 504 states and 517 transitions. [2023-02-15 01:15:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-02-15 01:15:13,059 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 5.645161290322581) internal successors, (350), 62 states have internal predecessors, (350), 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 436 [2023-02-15 01:15:13,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:15:13,060 INFO L225 Difference]: With dead ends: 504 [2023-02-15 01:15:13,060 INFO L226 Difference]: Without dead ends: 504 [2023-02-15 01:15:13,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 975 GetRequests, 830 SyntacticMatches, 8 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4906 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3683, Invalid=15499, Unknown=0, NotChecked=0, Total=19182 [2023-02-15 01:15:13,062 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 162 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 4077 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 4098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 4077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:15:13,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 313 Invalid, 4098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 4077 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-15 01:15:13,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-02-15 01:15:13,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2023-02-15 01:15:13,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.034) internal successors, (517), 503 states have internal predecessors, (517), 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 01:15:13,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 517 transitions. [2023-02-15 01:15:13,068 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 517 transitions. Word has length 436 [2023-02-15 01:15:13,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:15:13,068 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 517 transitions. [2023-02-15 01:15:13,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 5.645161290322581) internal successors, (350), 62 states have internal predecessors, (350), 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 01:15:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 517 transitions. [2023-02-15 01:15:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2023-02-15 01:15:13,071 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:15:13,071 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 65, 65, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-02-15 01:15:13,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-15 01:15:13,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-15 01:15:13,282 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:15:13,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:15:13,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1059357911, now seen corresponding path program 6 times [2023-02-15 01:15:13,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:15:13,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678448926] [2023-02-15 01:15:13,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:15:13,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:15:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:15:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11575 backedges. 2529 proven. 3474 refuted. 0 times theorem prover too weak. 5572 trivial. 0 not checked. [2023-02-15 01:15:15,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:15:15,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678448926] [2023-02-15 01:15:15,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678448926] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:15:15,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924584835] [2023-02-15 01:15:15,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 01:15:15,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:15:15,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:15:15,733 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:15:15,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-15 01:15:15,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-15 01:15:15,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:15:15,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 01:15:15,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:15:15,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:15:15,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-02-15 01:15:15,947 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 10 treesize of output 8 [2023-02-15 01:15:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11575 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 11537 trivial. 0 not checked. [2023-02-15 01:15:16,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:15:16,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924584835] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:15:16,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:15:16,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [28] total 31 [2023-02-15 01:15:16,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579040190] [2023-02-15 01:15:16,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:15:16,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:15:16,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:15:16,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:15:16,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-02-15 01:15:16,965 INFO L87 Difference]: Start difference. First operand 504 states and 517 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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 01:15:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:15:16,992 INFO L93 Difference]: Finished difference Result 503 states and 516 transitions. [2023-02-15 01:15:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 01:15:16,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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 441 [2023-02-15 01:15:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:15:16,999 INFO L225 Difference]: With dead ends: 503 [2023-02-15 01:15:16,999 INFO L226 Difference]: Without dead ends: 503 [2023-02-15 01:15:16,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-02-15 01:15:17,000 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:15:17,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 39 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:15:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-02-15 01:15:17,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 502. [2023-02-15 01:15:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 499 states have (on average 1.032064128256513) internal successors, (515), 501 states have internal predecessors, (515), 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 01:15:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 515 transitions. [2023-02-15 01:15:17,005 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 515 transitions. Word has length 441 [2023-02-15 01:15:17,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:15:17,006 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 515 transitions. [2023-02-15 01:15:17,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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 01:15:17,006 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 515 transitions. [2023-02-15 01:15:17,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2023-02-15 01:15:17,008 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:15:17,009 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 65, 65, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:15:17,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-15 01:15:17,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:15:17,214 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:15:17,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:15:17,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1519644578, now seen corresponding path program 2 times [2023-02-15 01:15:17,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:15:17,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909447880] [2023-02-15 01:15:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:15:17,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:15:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:15:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11565 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11375 trivial. 0 not checked. [2023-02-15 01:15:18,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:15:18,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909447880] [2023-02-15 01:15:18,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909447880] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:15:18,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990694853] [2023-02-15 01:15:18,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 01:15:18,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:15:18,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:15:18,053 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:15:18,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-15 01:15:18,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 01:15:18,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:15:18,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 01:15:18,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:15:20,389 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_33| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_28| Int) (v_ArrVal_2261 Int) (v_ArrVal_2263 Int) (v_ArrVal_2262 Int)) (and (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33| v_ArrVal_2262) |v_ULTIMATE.start_main_~#mask~0#1.base_28| v_ArrVal_2261) |v_ULTIMATE.start_main_~#b~0#1.base_33| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_28| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33| v_ArrVal_2263) |v_ULTIMATE.start_main_~#mask~0#1.base_28|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33|) 0))) is different from true [2023-02-15 01:15:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11565 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11565 trivial. 0 not checked. [2023-02-15 01:15:20,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:15:20,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990694853] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:15:20,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:15:20,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2023-02-15 01:15:20,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961065128] [2023-02-15 01:15:20,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:15:20,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:15:20,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:15:20,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:15:20,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2023-02-15 01:15:20,397 INFO L87 Difference]: Start difference. First operand 502 states and 515 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 01:15:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:15:20,406 INFO L93 Difference]: Finished difference Result 501 states and 514 transitions. [2023-02-15 01:15:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:15:20,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 442 [2023-02-15 01:15:20,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:15:20,408 INFO L225 Difference]: With dead ends: 501 [2023-02-15 01:15:20,408 INFO L226 Difference]: Without dead ends: 457 [2023-02-15 01:15:20,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2023-02-15 01:15:20,409 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:15:20,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2023-02-15 01:15:20,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-02-15 01:15:20,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2023-02-15 01:15:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 449 states have (on average 1.0311804008908685) internal successors, (463), 450 states have internal predecessors, (463), 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 01:15:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 463 transitions. [2023-02-15 01:15:20,414 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 463 transitions. Word has length 442 [2023-02-15 01:15:20,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:15:20,415 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 463 transitions. [2023-02-15 01:15:20,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 01:15:20,415 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 463 transitions. [2023-02-15 01:15:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-02-15 01:15:20,417 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:15:20,418 INFO L195 NwaCegarLoop]: trace histogram [77, 76, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-15 01:15:20,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-15 01:15:20,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:15:20,624 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:15:20,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:15:20,624 INFO L85 PathProgramCache]: Analyzing trace with hash -205352877, now seen corresponding path program 9 times [2023-02-15 01:15:20,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:15:20,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996516062] [2023-02-15 01:15:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:15:20,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:15:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:15:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 8596 proven. 1474 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2023-02-15 01:15:22,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:15:22,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996516062] [2023-02-15 01:15:22,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996516062] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:15:22,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132510136] [2023-02-15 01:15:22,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 01:15:22,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:15:22,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:15:22,369 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:15:22,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-15 01:15:22,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-02-15 01:15:22,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:15:22,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 01:15:22,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:15:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 2384 proven. 6676 refuted. 0 times theorem prover too weak. 6296 trivial. 0 not checked. [2023-02-15 01:15:23,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:15:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 0 proven. 9060 refuted. 0 times theorem prover too weak. 6296 trivial. 0 not checked. [2023-02-15 01:15:25,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132510136] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:15:25,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:15:25,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 20, 20] total 76 [2023-02-15 01:15:25,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665373396] [2023-02-15 01:15:25,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:15:25,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-15 01:15:25,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:15:25,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-15 01:15:25,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=4895, Unknown=0, NotChecked=0, Total=5700 [2023-02-15 01:15:25,700 INFO L87 Difference]: Start difference. First operand 451 states and 463 transitions. Second operand has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 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 01:15:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:15:39,850 INFO L93 Difference]: Finished difference Result 765 states and 801 transitions. [2023-02-15 01:15:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2023-02-15 01:15:39,851 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 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 448 [2023-02-15 01:15:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:15:39,854 INFO L225 Difference]: With dead ends: 765 [2023-02-15 01:15:39,854 INFO L226 Difference]: Without dead ends: 765 [2023-02-15 01:15:39,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 862 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26070 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=15061, Invalid=48695, Unknown=0, NotChecked=0, Total=63756 [2023-02-15 01:15:39,860 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2021 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2021 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 01:15:39,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2021 Valid, 112 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 01:15:39,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2023-02-15 01:15:39,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 751. [2023-02-15 01:15:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 749 states have (on average 1.0534045393858478) internal successors, (789), 750 states have internal predecessors, (789), 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 01:15:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 789 transitions. [2023-02-15 01:15:39,869 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 789 transitions. Word has length 448 [2023-02-15 01:15:39,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:15:39,869 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 789 transitions. [2023-02-15 01:15:39,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 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 01:15:39,870 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 789 transitions. [2023-02-15 01:15:39,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2023-02-15 01:15:39,872 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:15:39,873 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 87, 87, 87, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1] [2023-02-15 01:15:39,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-15 01:15:40,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:15:40,080 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:15:40,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:15:40,080 INFO L85 PathProgramCache]: Analyzing trace with hash 566383551, now seen corresponding path program 3 times [2023-02-15 01:15:40,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:15:40,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743028369] [2023-02-15 01:15:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:15:40,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:15:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:15:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 10633 proven. 1636 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2023-02-15 01:15:41,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:15:41,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743028369] [2023-02-15 01:15:41,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743028369] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:15:41,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221035707] [2023-02-15 01:15:41,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 01:15:41,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:15:41,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:15:41,951 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:15:41,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-15 01:15:42,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 01:15:42,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:15:42,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 01:15:42,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:15:42,162 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 01:15:42,162 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-02-15 01:15:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 108 proven. 7575 refuted. 0 times theorem prover too weak. 12488 trivial. 0 not checked. [2023-02-15 01:15:43,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:15:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 0 proven. 7683 refuted. 0 times theorem prover too weak. 12488 trivial. 0 not checked. [2023-02-15 01:15:45,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221035707] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:15:45,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:15:45,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 6, 6] total 49 [2023-02-15 01:15:45,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598624917] [2023-02-15 01:15:45,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:15:45,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 01:15:45,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:15:45,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 01:15:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1940, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 01:15:45,193 INFO L87 Difference]: Start difference. First operand 751 states and 789 transitions. Second operand has 49 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 49 states have internal predecessors, (240), 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 01:15:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:15:47,160 INFO L93 Difference]: Finished difference Result 776 states and 802 transitions. [2023-02-15 01:15:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-15 01:15:47,160 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 49 states have internal predecessors, (240), 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 511 [2023-02-15 01:15:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:15:47,162 INFO L225 Difference]: With dead ends: 776 [2023-02-15 01:15:47,162 INFO L226 Difference]: Without dead ends: 776 [2023-02-15 01:15:47,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1013 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2859 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2234, Invalid=7866, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 01:15:47,164 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 767 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:15:47,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 66 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 01:15:47,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2023-02-15 01:15:47,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 695. [2023-02-15 01:15:47,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.037463976945245) internal successors, (720), 694 states have internal predecessors, (720), 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 01:15:47,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 720 transitions. [2023-02-15 01:15:47,172 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 720 transitions. Word has length 511 [2023-02-15 01:15:47,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:15:47,172 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 720 transitions. [2023-02-15 01:15:47,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 49 states have internal predecessors, (240), 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 01:15:47,173 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 720 transitions. [2023-02-15 01:15:47,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2023-02-15 01:15:47,177 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:15:47,177 INFO L195 NwaCegarLoop]: trace histogram [122, 121, 121, 121, 121, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1] [2023-02-15 01:15:47,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-02-15 01:15:47,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-15 01:15:47,383 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:15:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:15:47,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1780829527, now seen corresponding path program 10 times [2023-02-15 01:15:47,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:15:47,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163115422] [2023-02-15 01:15:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:15:47,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:15:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:15:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 38480 backedges. 21336 proven. 5769 refuted. 0 times theorem prover too weak. 11375 trivial. 0 not checked. [2023-02-15 01:15:51,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:15:51,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163115422] [2023-02-15 01:15:51,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163115422] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:15:51,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578827247] [2023-02-15 01:15:51,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 01:15:51,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:15:51,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:15:51,513 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:15:51,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-15 01:15:52,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 01:15:52,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:15:53,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 2022 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-15 01:15:53,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:15:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 38480 backedges. 1298 proven. 34498 refuted. 0 times theorem prover too weak. 2684 trivial. 0 not checked. [2023-02-15 01:15:54,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:15:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 38480 backedges. 1298 proven. 34498 refuted. 0 times theorem prover too weak. 2684 trivial. 0 not checked. [2023-02-15 01:15:56,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578827247] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:15:56,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:15:56,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 38, 38] total 123 [2023-02-15 01:15:56,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170241567] [2023-02-15 01:15:56,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:15:56,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-02-15 01:15:56,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:15:56,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-02-15 01:15:56,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2306, Invalid=12700, Unknown=0, NotChecked=0, Total=15006 [2023-02-15 01:15:56,492 INFO L87 Difference]: Start difference. First operand 695 states and 720 transitions. Second operand has 123 states, 123 states have (on average 6.073170731707317) internal successors, (747), 123 states have internal predecessors, (747), 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 01:16:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:16:09,318 INFO L93 Difference]: Finished difference Result 1668 states and 1758 transitions. [2023-02-15 01:16:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 313 states. [2023-02-15 01:16:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 6.073170731707317) internal successors, (747), 123 states have internal predecessors, (747), 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 694 [2023-02-15 01:16:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:16:09,322 INFO L225 Difference]: With dead ends: 1668 [2023-02-15 01:16:09,323 INFO L226 Difference]: Without dead ends: 1668 [2023-02-15 01:16:09,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1746 GetRequests, 1320 SyntacticMatches, 10 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71608 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=27575, Invalid=146731, Unknown=0, NotChecked=0, Total=174306 [2023-02-15 01:16:09,333 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1264 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 5036 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 5287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 5036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:16:09,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1264 Valid, 457 Invalid, 5287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 5036 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-15 01:16:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2023-02-15 01:16:09,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1640. [2023-02-15 01:16:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 1.055521659548505) internal successors, (1730), 1639 states have internal predecessors, (1730), 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 01:16:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1730 transitions. [2023-02-15 01:16:09,354 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1730 transitions. Word has length 694 [2023-02-15 01:16:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:16:09,354 INFO L495 AbstractCegarLoop]: Abstraction has 1640 states and 1730 transitions. [2023-02-15 01:16:09,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 6.073170731707317) internal successors, (747), 123 states have internal predecessors, (747), 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 01:16:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1730 transitions. [2023-02-15 01:16:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1343 [2023-02-15 01:16:09,368 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:16:09,368 INFO L195 NwaCegarLoop]: trace histogram [239, 238, 238, 238, 238, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-15 01:16:09,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-02-15 01:16:09,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-15 01:16:09,581 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:16:09,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:16:09,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1519464941, now seen corresponding path program 11 times [2023-02-15 01:16:09,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:16:09,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198841796] [2023-02-15 01:16:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:16:09,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:16:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:16:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 148001 backedges. 86544 proven. 2852 refuted. 0 times theorem prover too weak. 58605 trivial. 0 not checked. [2023-02-15 01:16:13,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:16:13,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198841796] [2023-02-15 01:16:13,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198841796] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:16:13,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176906575] [2023-02-15 01:16:13,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 01:16:13,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:16:13,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:16:13,532 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:16:13,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-15 01:16:41,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2023-02-15 01:16:41,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:16:41,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1808 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 01:16:41,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:16:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 148001 backedges. 91615 proven. 7532 refuted. 0 times theorem prover too weak. 48854 trivial. 0 not checked. [2023-02-15 01:16:42,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:16:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 148001 backedges. 93272 proven. 5875 refuted. 0 times theorem prover too weak. 48854 trivial. 0 not checked. [2023-02-15 01:16:43,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176906575] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:16:43,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:16:43,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 78 [2023-02-15 01:16:43,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182044882] [2023-02-15 01:16:43,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:16:43,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-02-15 01:16:43,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:16:43,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-02-15 01:16:43,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=982, Invalid=5024, Unknown=0, NotChecked=0, Total=6006 [2023-02-15 01:16:43,842 INFO L87 Difference]: Start difference. First operand 1640 states and 1730 transitions. Second operand has 78 states, 78 states have (on average 5.730769230769231) internal successors, (447), 78 states have internal predecessors, (447), 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 01:16:50,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:16:50,209 INFO L93 Difference]: Finished difference Result 1640 states and 1694 transitions. [2023-02-15 01:16:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2023-02-15 01:16:50,209 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 5.730769230769231) internal successors, (447), 78 states have internal predecessors, (447), 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 1342 [2023-02-15 01:16:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:16:50,213 INFO L225 Difference]: With dead ends: 1640 [2023-02-15 01:16:50,213 INFO L226 Difference]: Without dead ends: 1640 [2023-02-15 01:16:50,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2834 GetRequests, 2630 SyntacticMatches, 10 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9980 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7187, Invalid=31033, Unknown=0, NotChecked=0, Total=38220 [2023-02-15 01:16:50,215 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 192 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 9068 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 9092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 9068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-02-15 01:16:50,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 493 Invalid, 9092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 9068 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-02-15 01:16:50,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2023-02-15 01:16:50,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1640. [2023-02-15 01:16:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 1.0335570469798658) internal successors, (1694), 1639 states have internal predecessors, (1694), 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 01:16:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1694 transitions. [2023-02-15 01:16:50,236 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1694 transitions. Word has length 1342 [2023-02-15 01:16:50,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:16:50,237 INFO L495 AbstractCegarLoop]: Abstraction has 1640 states and 1694 transitions. [2023-02-15 01:16:50,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 5.730769230769231) internal successors, (447), 78 states have internal predecessors, (447), 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 01:16:50,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1694 transitions. [2023-02-15 01:16:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1383 [2023-02-15 01:16:50,251 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:16:50,252 INFO L195 NwaCegarLoop]: trace histogram [247, 246, 246, 246, 246, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-15 01:16:50,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-15 01:16:50,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-15 01:16:50,470 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:16:50,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:16:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash 884344755, now seen corresponding path program 12 times [2023-02-15 01:16:50,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:16:50,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501174050] [2023-02-15 01:16:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:16:50,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:16:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:16:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 157845 backedges. 92683 proven. 1595 refuted. 0 times theorem prover too weak. 63567 trivial. 0 not checked. [2023-02-15 01:16:54,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:16:54,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501174050] [2023-02-15 01:16:54,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501174050] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:16:54,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422083743] [2023-02-15 01:16:54,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 01:16:54,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:16:54,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:16:54,201 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:16:54,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-15 01:17:03,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2023-02-15 01:17:03,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 01:17:03,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 2231 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-15 01:17:03,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:17:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 157845 backedges. 0 proven. 26770 refuted. 0 times theorem prover too weak. 131075 trivial. 0 not checked. [2023-02-15 01:17:05,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:17:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 157845 backedges. 25571 proven. 1199 refuted. 0 times theorem prover too weak. 131075 trivial. 0 not checked. [2023-02-15 01:17:06,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422083743] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:17:06,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:17:06,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 25, 24] total 81 [2023-02-15 01:17:06,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89751508] [2023-02-15 01:17:06,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:17:06,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-02-15 01:17:06,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:17:06,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-02-15 01:17:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=5646, Unknown=0, NotChecked=0, Total=6480 [2023-02-15 01:17:06,060 INFO L87 Difference]: Start difference. First operand 1640 states and 1694 transitions. Second operand has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 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 01:17:20,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:17:20,096 INFO L93 Difference]: Finished difference Result 1963 states and 2027 transitions. [2023-02-15 01:17:20,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-02-15 01:17:20,097 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 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 1382 [2023-02-15 01:17:20,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:17:20,101 INFO L225 Difference]: With dead ends: 1963 [2023-02-15 01:17:20,101 INFO L226 Difference]: Without dead ends: 1963 [2023-02-15 01:17:20,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2908 GetRequests, 2718 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8922 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=5164, Invalid=31508, Unknown=0, NotChecked=0, Total=36672 [2023-02-15 01:17:20,105 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2458 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 7773 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2458 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 7806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 7773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:17:20,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2458 Valid, 1077 Invalid, 7806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 7773 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-15 01:17:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2023-02-15 01:17:20,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1690. [2023-02-15 01:17:20,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.0325636471284785) internal successors, (1744), 1689 states have internal predecessors, (1744), 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 01:17:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1744 transitions. [2023-02-15 01:17:20,126 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1744 transitions. Word has length 1382 [2023-02-15 01:17:20,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:17:20,126 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 1744 transitions. [2023-02-15 01:17:20,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 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 01:17:20,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1744 transitions. [2023-02-15 01:17:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1468 [2023-02-15 01:17:20,142 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:17:20,143 INFO L195 NwaCegarLoop]: trace histogram [264, 263, 263, 263, 263, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-15 01:17:20,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-15 01:17:20,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-15 01:17:20,353 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:17:20,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:17:20,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1199622708, now seen corresponding path program 13 times [2023-02-15 01:17:20,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:17:20,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145745828] [2023-02-15 01:17:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:17:20,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:17:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:17:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 179826 backedges. 106853 proven. 1823 refuted. 0 times theorem prover too weak. 71150 trivial. 0 not checked. [2023-02-15 01:17:24,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:17:24,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145745828] [2023-02-15 01:17:24,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145745828] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:17:24,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114806349] [2023-02-15 01:17:24,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 01:17:24,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:17:24,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:17:24,421 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:17:24,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-15 01:17:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:17:25,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 4165 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 01:17:25,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:17:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 179826 backedges. 124640 proven. 9808 refuted. 0 times theorem prover too weak. 45378 trivial. 0 not checked. [2023-02-15 01:17:26,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:17:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 179826 backedges. 124640 proven. 9808 refuted. 0 times theorem prover too weak. 45378 trivial. 0 not checked. [2023-02-15 01:17:28,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114806349] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:17:28,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:17:28,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 81 [2023-02-15 01:17:28,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654807656] [2023-02-15 01:17:28,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:17:28,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-02-15 01:17:28,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:17:28,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-02-15 01:17:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1034, Invalid=5446, Unknown=0, NotChecked=0, Total=6480 [2023-02-15 01:17:28,261 INFO L87 Difference]: Start difference. First operand 1690 states and 1744 transitions. Second operand has 81 states, 81 states have (on average 6.222222222222222) internal successors, (504), 81 states have internal predecessors, (504), 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 01:17:37,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:17:37,046 INFO L93 Difference]: Finished difference Result 1690 states and 1735 transitions. [2023-02-15 01:17:37,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2023-02-15 01:17:37,046 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 6.222222222222222) internal successors, (504), 81 states have internal predecessors, (504), 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 1467 [2023-02-15 01:17:37,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:17:37,050 INFO L225 Difference]: With dead ends: 1690 [2023-02-15 01:17:37,050 INFO L226 Difference]: Without dead ends: 1690 [2023-02-15 01:17:37,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3119 GetRequests, 2875 SyntacticMatches, 15 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14030 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=9152, Invalid=43978, Unknown=0, NotChecked=0, Total=53130 [2023-02-15 01:17:37,055 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 11077 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 11100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 11077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-02-15 01:17:37,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 463 Invalid, 11100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 11077 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-02-15 01:17:37,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2023-02-15 01:17:37,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1690. [2023-02-15 01:17:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.0272350503256364) internal successors, (1735), 1689 states have internal predecessors, (1735), 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 01:17:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1735 transitions. [2023-02-15 01:17:37,072 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1735 transitions. Word has length 1467 [2023-02-15 01:17:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:17:37,072 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 1735 transitions. [2023-02-15 01:17:37,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 6.222222222222222) internal successors, (504), 81 states have internal predecessors, (504), 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 01:17:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1735 transitions. [2023-02-15 01:17:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1498 [2023-02-15 01:17:37,088 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:17:37,089 INFO L195 NwaCegarLoop]: trace histogram [270, 269, 269, 269, 269, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-15 01:17:37,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-15 01:17:37,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:17:37,302 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 01:17:37,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:17:37,302 INFO L85 PathProgramCache]: Analyzing trace with hash -697448124, now seen corresponding path program 14 times [2023-02-15 01:17:37,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:17:37,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402869213] [2023-02-15 01:17:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:17:37,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:17:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat