./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 e8d55036 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-?-e8d5503-m [2023-02-15 22:04:15,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 22:04:15,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 22:04:15,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 22:04:15,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 22:04:15,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 22:04:15,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 22:04:15,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 22:04:15,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 22:04:15,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 22:04:15,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 22:04:15,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 22:04:15,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 22:04:15,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 22:04:15,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 22:04:15,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 22:04:15,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 22:04:15,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 22:04:15,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 22:04:15,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 22:04:15,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 22:04:15,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 22:04:15,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 22:04:15,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 22:04:15,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 22:04:15,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 22:04:15,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 22:04:15,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 22:04:15,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 22:04:15,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 22:04:15,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 22:04:15,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 22:04:15,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 22:04:15,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 22:04:15,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 22:04:15,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 22:04:15,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 22:04:15,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 22:04:15,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 22:04:15,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 22:04:15,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 22:04:15,757 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 22:04:15,790 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 22:04:15,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 22:04:15,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 22:04:15,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 22:04:15,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 22:04:15,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 22:04:15,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 22:04:15,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 22:04:15,793 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 22:04:15,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 22:04:15,794 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 22:04:15,794 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 22:04:15,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 22:04:15,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 22:04:15,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 22:04:15,795 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 22:04:15,795 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 22:04:15,795 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 22:04:15,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 22:04:15,796 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 22:04:15,796 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 22:04:15,796 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 22:04:15,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 22:04:15,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 22:04:15,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 22:04:15,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:04:15,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 22:04:15,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 22:04:15,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 22:04:15,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 22:04:15,798 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 22:04:15,798 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 22:04:15,798 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 22:04:15,798 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 22:04:15,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2023-02-15 22:04:16,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 22:04:16,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 22:04:16,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 22:04:16,062 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 22:04:16,063 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 22:04:16,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2023-02-15 22:04:17,224 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 22:04:17,376 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 22:04:17,376 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2023-02-15 22:04:17,381 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93dadce18/f8582cb472c74bf09ade2639d28e16cd/FLAG5b2eb57ab [2023-02-15 22:04:17,394 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93dadce18/f8582cb472c74bf09ade2639d28e16cd [2023-02-15 22:04:17,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 22:04:17,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 22:04:17,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 22:04:17,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 22:04:17,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 22:04:17,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:04:17" (1/1) ... [2023-02-15 22:04:17,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48cb5af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:04:17, skipping insertion in model container [2023-02-15 22:04:17,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:04:17" (1/1) ... [2023-02-15 22:04:17,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 22:04:17,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 22:04:17,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:04:17,569 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 22:04:17,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:04:17,590 INFO L208 MainTranslator]: Completed translation [2023-02-15 22:04:17,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:04:17 WrapperNode [2023-02-15 22:04:17,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 22:04:17,592 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 22:04:17,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 22:04:17,593 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 22:04:17,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:04:17" (1/1) ... [2023-02-15 22:04:17,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:04:17" (1/1) ... [2023-02-15 22:04:17,620 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2023-02-15 22:04:17,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 22:04:17,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 22:04:17,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 22:04:17,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 22:04:17,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:04:17" (1/1) ... [2023-02-15 22:04:17,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:04:17" (1/1) ... [2023-02-15 22:04:17,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:04:17" (1/1) ... [2023-02-15 22:04:17,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:04:17" (1/1) ... [2023-02-15 22:04:17,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:04:17" (1/1) ... [2023-02-15 22:04:17,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:04:17" (1/1) ... [2023-02-15 22:04:17,639 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:04:17" (1/1) ... [2023-02-15 22:04:17,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:04:17" (1/1) ... [2023-02-15 22:04:17,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 22:04:17,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 22:04:17,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 22:04:17,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 22:04:17,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:04:17" (1/1) ... [2023-02-15 22:04:17,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:04:17,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:17,674 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 22:04:17,688 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 22:04:17,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 22:04:17,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 22:04:17,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 22:04:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 22:04:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 22:04:17,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 22:04:17,776 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 22:04:17,780 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 22:04:17,916 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 22:04:17,921 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 22:04:17,921 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 22:04:17,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:04:17 BoogieIcfgContainer [2023-02-15 22:04:17,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 22:04:17,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 22:04:17,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 22:04:17,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 22:04:17,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:04:17" (1/3) ... [2023-02-15 22:04:17,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91fc81d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:04:17, skipping insertion in model container [2023-02-15 22:04:17,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:04:17" (2/3) ... [2023-02-15 22:04:17,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91fc81d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:04:17, skipping insertion in model container [2023-02-15 22:04:17,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:04:17" (3/3) ... [2023-02-15 22:04:17,932 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2023-02-15 22:04:17,959 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 22:04:17,959 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-15 22:04:18,029 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 22:04:18,035 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;@4b350c0b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 22:04:18,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-15 22:04:18,040 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 22:04:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-15 22:04:18,049 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:18,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-15 22:04:18,050 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 22:04:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2023-02-15 22:04:18,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:18,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406662463] [2023-02-15 22:04:18,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:18,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:18,295 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 22:04:18,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:18,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406662463] [2023-02-15 22:04:18,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406662463] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:18,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:18,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:04:18,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006403530] [2023-02-15 22:04:18,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:18,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:04:18,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:18,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:04:18,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:04:18,330 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 22:04:18,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:18,371 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-02-15 22:04:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:04:18,382 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 22:04:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:18,389 INFO L225 Difference]: With dead ends: 59 [2023-02-15 22:04:18,391 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 22:04:18,393 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 22:04:18,396 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 22:04:18,397 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 22:04:18,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 22:04:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2023-02-15 22:04:18,428 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 22:04:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-02-15 22:04:18,430 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2023-02-15 22:04:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:18,431 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-02-15 22:04:18,431 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 22:04:18,431 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-02-15 22:04:18,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 22:04:18,433 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:18,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 22:04:18,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 22:04:18,434 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 22:04:18,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:18,434 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2023-02-15 22:04:18,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:18,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54034827] [2023-02-15 22:04:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:18,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:18,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:18,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54034827] [2023-02-15 22:04:18,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54034827] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:18,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:18,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:04:18,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075904067] [2023-02-15 22:04:18,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:18,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:04:18,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:18,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:04:18,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:04:18,508 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 22:04:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:18,545 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-02-15 22:04:18,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:04:18,546 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 22:04:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:18,547 INFO L225 Difference]: With dead ends: 58 [2023-02-15 22:04:18,547 INFO L226 Difference]: Without dead ends: 58 [2023-02-15 22:04:18,547 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 22:04:18,548 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 22:04:18,549 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 22:04:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-15 22:04:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2023-02-15 22:04:18,553 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 22:04:18,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-15 22:04:18,554 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2023-02-15 22:04:18,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:18,554 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-15 22:04:18,554 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 22:04:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-15 22:04:18,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 22:04:18,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:18,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 22:04:18,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 22:04:18,556 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 22:04:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:18,557 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2023-02-15 22:04:18,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:18,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604892104] [2023-02-15 22:04:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:18,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:18,635 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 22:04:18,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:18,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604892104] [2023-02-15 22:04:18,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604892104] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:18,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:18,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:04:18,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966893244] [2023-02-15 22:04:18,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:18,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:04:18,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:18,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:04:18,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:04:18,639 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 22:04:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:18,671 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-02-15 22:04:18,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:04:18,672 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 22:04:18,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:18,672 INFO L225 Difference]: With dead ends: 32 [2023-02-15 22:04:18,672 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 22:04:18,673 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 22:04:18,674 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 22:04:18,675 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 22:04:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 22:04:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-15 22:04:18,678 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 22:04:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-02-15 22:04:18,680 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2023-02-15 22:04:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:18,681 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-02-15 22:04:18,681 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 22:04:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-02-15 22:04:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 22:04:18,682 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:18,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 22:04:18,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 22:04:18,683 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 22:04:18,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:18,686 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2023-02-15 22:04:18,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:18,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019184662] [2023-02-15 22:04:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:18,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:18,858 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 22:04:18,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:18,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019184662] [2023-02-15 22:04:18,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019184662] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:18,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:18,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:04:18,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170198130] [2023-02-15 22:04:18,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:18,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:04:18,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:18,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:04:18,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:04:18,862 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 22:04:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:18,947 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-02-15 22:04:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 22:04:18,948 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 22:04:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:18,950 INFO L225 Difference]: With dead ends: 55 [2023-02-15 22:04:18,951 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 22:04:18,951 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 22:04:18,952 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, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:18,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:04:18,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 22:04:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2023-02-15 22:04:18,959 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 22:04:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-15 22:04:18,960 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2023-02-15 22:04:18,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:18,961 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-15 22:04:18,962 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 22:04:18,962 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-15 22:04:18,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 22:04:18,963 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:18,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:18,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 22:04:18,963 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 22:04:18,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:18,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2023-02-15 22:04:18,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:18,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676724416] [2023-02-15 22:04:18,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:18,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:19,013 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 22:04:19,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:19,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676724416] [2023-02-15 22:04:19,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676724416] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:19,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:19,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:04:19,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440517944] [2023-02-15 22:04:19,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:19,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:04:19,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:19,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:04:19,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:04:19,016 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 22:04:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:19,029 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-02-15 22:04:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:04:19,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 22:04:19,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:19,030 INFO L225 Difference]: With dead ends: 31 [2023-02-15 22:04:19,030 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 22:04:19,031 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 22:04:19,032 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:19,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:04:19,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 22:04:19,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-15 22:04:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3461538461538463) 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 22:04:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-02-15 22:04:19,036 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 7 [2023-02-15 22:04:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:19,037 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-02-15 22:04:19,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 22:04:19,037 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-02-15 22:04:19,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 22:04:19,038 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:19,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:19,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 22:04:19,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:04:19,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:19,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810360, now seen corresponding path program 1 times [2023-02-15 22:04:19,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:19,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067930496] [2023-02-15 22:04:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:19,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:19,091 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 22:04:19,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:19,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067930496] [2023-02-15 22:04:19,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067930496] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:19,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:19,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:04:19,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39188946] [2023-02-15 22:04:19,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:19,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:04:19,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:19,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:04:19,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:04:19,094 INFO L87 Difference]: Start difference. First operand 31 states and 35 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 22:04:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:19,136 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-02-15 22:04:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:04:19,137 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 22:04:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:19,138 INFO L225 Difference]: With dead ends: 56 [2023-02-15 22:04:19,138 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 22:04:19,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 22:04:19,139 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:19,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:04:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 22:04:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2023-02-15 22:04:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3333333333333333) 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 22:04:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-02-15 22:04:19,143 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 7 [2023-02-15 22:04:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:19,144 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-02-15 22:04:19,144 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 22:04:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-02-15 22:04:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 22:04:19,144 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:19,145 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:19,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 22:04:19,145 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:04:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:19,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2023-02-15 22:04:19,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:19,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050404654] [2023-02-15 22:04:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:19,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:19,199 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 22:04:19,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:19,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050404654] [2023-02-15 22:04:19,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050404654] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:19,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165041379] [2023-02-15 22:04:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:19,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:19,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:19,204 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 22:04:19,232 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 22:04:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:19,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 22:04:19,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:19,304 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 22:04:19,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:19,347 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 22:04:19,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165041379] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:19,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:19,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-02-15 22:04:19,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334417664] [2023-02-15 22:04:19,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:19,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:04:19,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:19,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:04:19,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:04:19,352 INFO L87 Difference]: Start difference. First operand 32 states and 36 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 22:04:19,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:19,446 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2023-02-15 22:04:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:04:19,448 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 22:04:19,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:19,451 INFO L225 Difference]: With dead ends: 120 [2023-02-15 22:04:19,452 INFO L226 Difference]: Without dead ends: 120 [2023-02-15 22:04:19,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-02-15 22:04:19,453 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 127 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:19,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 148 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:04:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-15 22:04:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 46. [2023-02-15 22:04:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 45 states have internal predecessors, (55), 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 22:04:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2023-02-15 22:04:19,461 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2023-02-15 22:04:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:19,461 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2023-02-15 22:04:19,461 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 22:04:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2023-02-15 22:04:19,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 22:04:19,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:19,462 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:19,471 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 22:04:19,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:19,672 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:04:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:19,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2023-02-15 22:04:19,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:19,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961569743] [2023-02-15 22:04:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:19,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:19,811 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 22:04:19,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:19,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961569743] [2023-02-15 22:04:19,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961569743] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:19,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765265159] [2023-02-15 22:04:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:19,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:19,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:19,821 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 22:04:19,824 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 22:04:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:19,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 22:04:19,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:19,943 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 22:04:19,944 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 22:04:20,038 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 22:04:20,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:20,135 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 22:04:20,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765265159] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:20,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:20,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-02-15 22:04:20,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72825721] [2023-02-15 22:04:20,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:20,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 22:04:20,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:20,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 22:04:20,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-15 22:04:20,142 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 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 22:04:20,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:20,349 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2023-02-15 22:04:20,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 22:04:20,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 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 22:04:20,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:20,351 INFO L225 Difference]: With dead ends: 119 [2023-02-15 22:04:20,351 INFO L226 Difference]: Without dead ends: 119 [2023-02-15 22:04:20,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-02-15 22:04:20,355 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 210 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:20,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 112 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:04:20,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-15 22:04:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 47. [2023-02-15 22:04:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 46 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 22:04:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2023-02-15 22:04:20,372 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 11 [2023-02-15 22:04:20,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:20,373 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2023-02-15 22:04:20,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 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 22:04:20,373 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2023-02-15 22:04:20,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 22:04:20,375 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:20,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:20,383 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 22:04:20,581 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,SelfDestructingSolverStorable7 [2023-02-15 22:04:20,581 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:04:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:20,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088609, now seen corresponding path program 1 times [2023-02-15 22:04:20,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:20,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977870516] [2023-02-15 22:04:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:20,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:20,642 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 22:04:20,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:20,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977870516] [2023-02-15 22:04:20,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977870516] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:20,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937493989] [2023-02-15 22:04:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:20,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:20,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:20,645 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 22:04:20,648 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 22:04:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:20,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 22:04:20,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:20,737 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 22:04:20,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:20,773 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 22:04:20,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937493989] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:20,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:20,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-02-15 22:04:20,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154458112] [2023-02-15 22:04:20,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:20,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 22:04:20,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:20,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 22:04:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 22:04:20,777 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 22:04:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:20,913 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2023-02-15 22:04:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 22:04:20,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 22:04:20,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:20,915 INFO L225 Difference]: With dead ends: 84 [2023-02-15 22:04:20,915 INFO L226 Difference]: Without dead ends: 84 [2023-02-15 22:04:20,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-02-15 22:04:20,917 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 85 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:20,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 45 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:04:20,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-15 22:04:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 46. [2023-02-15 22:04:20,921 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 22:04:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-02-15 22:04:20,922 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 12 [2023-02-15 22:04:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:20,923 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-02-15 22:04:20,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 22:04:20,923 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-02-15 22:04:20,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 22:04:20,923 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:20,924 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:20,932 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 22:04:21,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:21,130 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 22:04:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:21,130 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 2 times [2023-02-15 22:04:21,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:21,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635354176] [2023-02-15 22:04:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:21,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:21,266 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 22:04:21,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:21,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635354176] [2023-02-15 22:04:21,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635354176] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:21,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:21,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:04:21,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59488847] [2023-02-15 22:04:21,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:21,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:04:21,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:21,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:04:21,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:04:21,269 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 22:04:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:21,307 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2023-02-15 22:04:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:04:21,307 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 22:04:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:21,308 INFO L225 Difference]: With dead ends: 76 [2023-02-15 22:04:21,308 INFO L226 Difference]: Without dead ends: 76 [2023-02-15 22:04:21,309 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 22:04:21,311 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 22:04:21,312 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 22:04:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-15 22:04:21,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2023-02-15 22:04:21,320 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 22:04:21,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2023-02-15 22:04:21,322 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2023-02-15 22:04:21,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:21,322 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2023-02-15 22:04:21,323 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 22:04:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2023-02-15 22:04:21,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 22:04:21,323 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:21,324 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 22:04:21,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 22:04:21,324 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 22:04:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:21,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2023-02-15 22:04:21,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:21,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706114775] [2023-02-15 22:04:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:21,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:21,415 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 22:04:21,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:21,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706114775] [2023-02-15 22:04:21,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706114775] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:21,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663828971] [2023-02-15 22:04:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:21,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:21,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:21,421 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 22:04:21,424 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 22:04:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:21,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 22:04:21,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:21,567 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 22:04:21,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:21,606 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 22:04:21,668 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 22:04:21,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663828971] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:21,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:21,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-02-15 22:04:21,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729374061] [2023-02-15 22:04:21,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:21,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 22:04:21,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:21,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 22:04:21,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 22:04:21,670 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 22:04:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:21,751 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2023-02-15 22:04:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 22:04:21,752 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 22:04:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:21,752 INFO L225 Difference]: With dead ends: 80 [2023-02-15 22:04:21,753 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 22:04:21,753 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 22:04:21,753 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:21,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 51 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:04:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 22:04:21,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2023-02-15 22:04:21,756 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 22:04:21,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2023-02-15 22:04:21,756 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2023-02-15 22:04:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:21,756 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2023-02-15 22:04:21,757 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 22:04:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2023-02-15 22:04:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 22:04:21,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:21,758 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2023-02-15 22:04:21,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 22:04:21,963 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 22:04:21,964 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 22:04:21,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:21,964 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2023-02-15 22:04:21,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:21,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329297832] [2023-02-15 22:04:21,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:21,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:22,094 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 22:04:22,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:22,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329297832] [2023-02-15 22:04:22,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329297832] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:22,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118955726] [2023-02-15 22:04:22,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:04:22,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:22,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:22,098 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 22:04:22,100 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 22:04:22,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:04:22,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:04:22,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 22:04:22,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:22,211 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 22:04:22,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:04:22,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118955726] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:22,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:04:22,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-02-15 22:04:22,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819921570] [2023-02-15 22:04:22,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:22,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:04:22,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:22,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:04:22,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:04:22,213 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 22:04:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:22,282 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2023-02-15 22:04:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:04:22,283 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 22:04:22,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:22,283 INFO L225 Difference]: With dead ends: 86 [2023-02-15 22:04:22,284 INFO L226 Difference]: Without dead ends: 86 [2023-02-15 22:04:22,284 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 22:04:22,284 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:22,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 58 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:04:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-15 22:04:22,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2023-02-15 22:04:22,286 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 22:04:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2023-02-15 22:04:22,287 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2023-02-15 22:04:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:22,287 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2023-02-15 22:04:22,287 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 22:04:22,287 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2023-02-15 22:04:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 22:04:22,288 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:22,288 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 22:04:22,296 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 22:04:22,494 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 22:04:22,494 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 22:04:22,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:22,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2023-02-15 22:04:22,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:22,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115840909] [2023-02-15 22:04:22,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:22,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:22,561 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 22:04:22,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:22,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115840909] [2023-02-15 22:04:22,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115840909] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:22,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511396355] [2023-02-15 22:04:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:22,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:22,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:22,564 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 22:04:22,566 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 22:04:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:22,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 22:04:22,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:22,663 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 22:04:22,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:22,734 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 22:04:22,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511396355] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:22,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:22,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2023-02-15 22:04:22,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404865371] [2023-02-15 22:04:22,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:22,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 22:04:22,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:22,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 22:04:22,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2023-02-15 22:04:22,736 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 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 22:04:22,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:22,885 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2023-02-15 22:04:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 22:04:22,885 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 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 22:04:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:22,886 INFO L225 Difference]: With dead ends: 152 [2023-02-15 22:04:22,886 INFO L226 Difference]: Without dead ends: 152 [2023-02-15 22:04:22,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:04:22,887 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 137 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:22,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 86 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:04:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-15 22:04:22,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2023-02-15 22:04:22,889 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 22:04:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2023-02-15 22:04:22,890 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 26 [2023-02-15 22:04:22,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:22,890 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2023-02-15 22:04:22,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 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 22:04:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2023-02-15 22:04:22,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 22:04:22,891 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:22,891 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:22,903 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 22:04:23,101 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 22:04:23,101 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 22:04:23,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:23,102 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2023-02-15 22:04:23,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:23,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058398407] [2023-02-15 22:04:23,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:23,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:23,184 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 22:04:23,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:23,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058398407] [2023-02-15 22:04:23,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058398407] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:23,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983709908] [2023-02-15 22:04:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:23,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:23,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:23,189 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 22:04:23,192 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 22:04:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:23,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 22:04:23,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:23,325 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 22:04:23,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:23,379 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 22:04:23,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983709908] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:23,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:23,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-02-15 22:04:23,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892511131] [2023-02-15 22:04:23,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:23,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 22:04:23,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:23,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 22:04:23,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:04:23,381 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 22:04:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:23,522 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2023-02-15 22:04:23,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 22:04:23,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 22:04:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:23,523 INFO L225 Difference]: With dead ends: 136 [2023-02-15 22:04:23,523 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 22:04:23,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-02-15 22:04:23,524 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:23,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 68 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:04:23,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 22:04:23,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2023-02-15 22:04:23,526 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 22:04:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2023-02-15 22:04:23,527 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 34 [2023-02-15 22:04:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:23,527 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2023-02-15 22:04:23,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 22:04:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2023-02-15 22:04:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 22:04:23,528 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:23,529 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:23,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 22:04:23,735 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 22:04:23,735 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 22:04:23,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:23,736 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2023-02-15 22:04:23,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:23,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441356061] [2023-02-15 22:04:23,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:23,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:23,975 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 22:04:23,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:23,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441356061] [2023-02-15 22:04:23,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441356061] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:23,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823037517] [2023-02-15 22:04:23,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:04:23,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:23,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:23,978 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 22:04:23,980 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 22:04:24,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:04:24,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:04:24,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 22:04:24,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:24,066 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 22:04:24,067 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 22:04:24,081 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 22:04:24,267 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 22:04:24,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:24,443 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 22:04:24,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823037517] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:24,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:24,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-02-15 22:04:24,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506844976] [2023-02-15 22:04:24,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:24,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 22:04:24,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:24,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 22:04:24,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-02-15 22:04:24,445 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 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 22:04:24,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:24,553 INFO L93 Difference]: Finished difference Result 165 states and 180 transitions. [2023-02-15 22:04:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:04:24,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 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 22:04:24,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:24,554 INFO L225 Difference]: With dead ends: 165 [2023-02-15 22:04:24,555 INFO L226 Difference]: Without dead ends: 165 [2023-02-15 22:04:24,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:04:24,556 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:24,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 103 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:04:24,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-15 22:04:24,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2023-02-15 22:04:24,560 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 22:04:24,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2023-02-15 22:04:24,561 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 39 [2023-02-15 22:04:24,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:24,561 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2023-02-15 22:04:24,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.777777777777778) internal successors, (70), 10 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 22:04:24,561 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2023-02-15 22:04:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 22:04:24,562 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:24,562 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:24,568 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 22:04:24,762 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 22:04:24,763 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 22:04:24,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:24,763 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2023-02-15 22:04:24,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:24,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176535583] [2023-02-15 22:04:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:24,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:24,885 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 22:04:24,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:24,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176535583] [2023-02-15 22:04:24,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176535583] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:24,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086235390] [2023-02-15 22:04:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:24,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:24,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:24,887 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 22:04:24,912 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 22:04:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:24,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 22:04:24,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:25,053 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 22:04:25,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:25,118 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 22:04:25,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086235390] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:25,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:25,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-02-15 22:04:25,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754033631] [2023-02-15 22:04:25,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:25,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 22:04:25,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:25,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 22:04:25,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-02-15 22:04:25,120 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 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 22:04:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:25,313 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2023-02-15 22:04:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 22:04:25,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 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 22:04:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:25,314 INFO L225 Difference]: With dead ends: 159 [2023-02-15 22:04:25,314 INFO L226 Difference]: Without dead ends: 159 [2023-02-15 22:04:25,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2023-02-15 22:04:25,315 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 98 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 109 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 22:04:25,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 109 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:04:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-15 22:04:25,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2023-02-15 22:04:25,317 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 22:04:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 169 transitions. [2023-02-15 22:04:25,318 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 169 transitions. Word has length 42 [2023-02-15 22:04:25,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:25,318 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 169 transitions. [2023-02-15 22:04:25,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 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 22:04:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 169 transitions. [2023-02-15 22:04:25,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 22:04:25,319 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:25,319 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2023-02-15 22:04:25,328 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 22:04:25,519 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 22:04:25,520 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 22:04:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:25,520 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2023-02-15 22:04:25,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:25,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50412170] [2023-02-15 22:04:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:25,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 27 proven. 175 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 22:04:25,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:25,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50412170] [2023-02-15 22:04:25,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50412170] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:25,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900397798] [2023-02-15 22:04:25,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:04:25,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:25,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:25,681 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 22:04:25,704 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 22:04:25,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:04:25,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:04:25,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 22:04:25,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:25,945 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 22:04:25,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:26,052 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 22:04:26,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900397798] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:26,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:26,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2023-02-15 22:04:26,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505524228] [2023-02-15 22:04:26,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:26,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 22:04:26,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:26,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 22:04:26,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-02-15 22:04:26,054 INFO L87 Difference]: Start difference. First operand 152 states and 169 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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 22:04:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:26,393 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2023-02-15 22:04:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 22:04:26,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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 22:04:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:26,395 INFO L225 Difference]: With dead ends: 167 [2023-02-15 22:04:26,395 INFO L226 Difference]: Without dead ends: 167 [2023-02-15 22:04:26,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 114 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=877, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 22:04:26,396 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 195 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:26,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 109 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:04:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-15 22:04:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2023-02-15 22:04:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1310344827586207) internal successors, (164), 149 states have internal predecessors, (164), 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 22:04:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 164 transitions. [2023-02-15 22:04:26,399 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 164 transitions. Word has length 64 [2023-02-15 22:04:26,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:26,400 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 164 transitions. [2023-02-15 22:04:26,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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 22:04:26,401 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 164 transitions. [2023-02-15 22:04:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-15 22:04:26,403 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:26,403 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-15 22:04:26,411 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 22:04:26,609 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 22:04:26,609 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 22:04:26,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:26,610 INFO L85 PathProgramCache]: Analyzing trace with hash -831517957, now seen corresponding path program 3 times [2023-02-15 22:04:26,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:26,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135472265] [2023-02-15 22:04:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:26,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 205 proven. 149 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-15 22:04:26,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:26,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135472265] [2023-02-15 22:04:26,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135472265] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:26,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653817669] [2023-02-15 22:04:26,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 22:04:26,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:26,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:26,813 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 22:04:26,837 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 22:04:26,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 22:04:26,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:04:26,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 22:04:26,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 191 proven. 38 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-02-15 22:04:26,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 191 proven. 38 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-02-15 22:04:27,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653817669] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:27,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:27,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2023-02-15 22:04:27,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810156393] [2023-02-15 22:04:27,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:27,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 22:04:27,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:27,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 22:04:27,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-02-15 22:04:27,062 INFO L87 Difference]: Start difference. First operand 150 states and 164 transitions. Second operand has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 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 22:04:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:28,757 INFO L93 Difference]: Finished difference Result 460 states and 509 transitions. [2023-02-15 22:04:28,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-15 22:04:28,757 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 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 86 [2023-02-15 22:04:28,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:28,758 INFO L225 Difference]: With dead ends: 460 [2023-02-15 22:04:28,759 INFO L226 Difference]: Without dead ends: 460 [2023-02-15 22:04:28,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=644, Invalid=2548, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 22:04:28,760 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 964 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:28,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 211 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 22:04:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2023-02-15 22:04:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 208. [2023-02-15 22:04:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.187192118226601) internal successors, (241), 207 states have internal predecessors, (241), 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 22:04:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 241 transitions. [2023-02-15 22:04:28,765 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 241 transitions. Word has length 86 [2023-02-15 22:04:28,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:28,765 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 241 transitions. [2023-02-15 22:04:28,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 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 22:04:28,766 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 241 transitions. [2023-02-15 22:04:28,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-15 22:04:28,766 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:28,767 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-15 22:04:28,776 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 22:04:28,973 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 22:04:28,973 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:04:28,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:28,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2023-02-15 22:04:28,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:28,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422157639] [2023-02-15 22:04:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:28,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:29,296 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 22:04:29,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:29,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422157639] [2023-02-15 22:04:29,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422157639] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:29,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943205259] [2023-02-15 22:04:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:29,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:29,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:29,299 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 22:04:29,301 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 22:04:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:29,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 22:04:29,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:29,407 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 22:04:29,407 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 22:04:29,707 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 22:04:29,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:30,106 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 22:04:30,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943205259] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:30,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:30,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-02-15 22:04:30,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230381348] [2023-02-15 22:04:30,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:30,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 22:04:30,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:30,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 22:04:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-15 22:04:30,110 INFO L87 Difference]: Start difference. First operand 208 states and 241 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 22:04:30,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:30,596 INFO L93 Difference]: Finished difference Result 408 states and 473 transitions. [2023-02-15 22:04:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 22:04:30,597 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 22:04:30,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:30,598 INFO L225 Difference]: With dead ends: 408 [2023-02-15 22:04:30,598 INFO L226 Difference]: Without dead ends: 408 [2023-02-15 22:04:30,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2023-02-15 22:04:30,599 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 545 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:30,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 203 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:04:30,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-02-15 22:04:30,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 210. [2023-02-15 22:04:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.1365853658536584) internal successors, (233), 209 states have internal predecessors, (233), 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 22:04:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 233 transitions. [2023-02-15 22:04:30,604 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 233 transitions. Word has length 92 [2023-02-15 22:04:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:30,604 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 233 transitions. [2023-02-15 22:04:30,604 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 22:04:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 233 transitions. [2023-02-15 22:04:30,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-02-15 22:04:30,605 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:30,605 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:30,614 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 22:04:30,811 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 22:04:30,811 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:04:30,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:30,811 INFO L85 PathProgramCache]: Analyzing trace with hash 448185099, now seen corresponding path program 2 times [2023-02-15 22:04:30,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:30,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866634991] [2023-02-15 22:04:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:30,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 95 proven. 334 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-15 22:04:31,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:31,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866634991] [2023-02-15 22:04:31,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866634991] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:31,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543775744] [2023-02-15 22:04:31,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:04:31,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:31,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:31,033 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 22:04:31,048 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 22:04:31,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 22:04:31,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:04:31,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 22:04:31,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:31,660 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_22| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_17| Int) (v_ArrVal_400 Int) (v_ArrVal_399 Int) (v_ArrVal_398 Int)) (and (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_22|)) (= 0 (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_22| v_ArrVal_400) |v_ULTIMATE.start_main_~#mask~0#1.base_17|)) (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_22| v_ArrVal_399) |v_ULTIMATE.start_main_~#mask~0#1.base_17| v_ArrVal_398) |v_ULTIMATE.start_main_~#b~0#1.base_22| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_17| 0)))) is different from true [2023-02-15 22:04:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2023-02-15 22:04:31,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:04:31,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543775744] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:31,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:04:31,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 13 [2023-02-15 22:04:31,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827008057] [2023-02-15 22:04:31,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:31,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:04:31,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:31,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:04:31,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=99, Unknown=1, NotChecked=20, Total=156 [2023-02-15 22:04:31,665 INFO L87 Difference]: Start difference. First operand 210 states and 233 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 22:04:31,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:31,679 INFO L93 Difference]: Finished difference Result 211 states and 233 transitions. [2023-02-15 22:04:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:04:31,680 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 102 [2023-02-15 22:04:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:31,681 INFO L225 Difference]: With dead ends: 211 [2023-02-15 22:04:31,681 INFO L226 Difference]: Without dead ends: 209 [2023-02-15 22:04:31,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=99, Unknown=1, NotChecked=20, Total=156 [2023-02-15 22:04:31,682 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 22:04:31,682 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 22:04:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-02-15 22:04:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2023-02-15 22:04:31,685 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 22:04:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 228 transitions. [2023-02-15 22:04:31,686 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 228 transitions. Word has length 102 [2023-02-15 22:04:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:31,686 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 228 transitions. [2023-02-15 22:04:31,686 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 22:04:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 228 transitions. [2023-02-15 22:04:31,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-15 22:04:31,687 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:31,687 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 22:04:31,693 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 22:04:31,893 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 22:04:31,893 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 22:04:31,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:31,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1008958684, now seen corresponding path program 1 times [2023-02-15 22:04:31,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:31,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347943746] [2023-02-15 22:04:31,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:31,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 95 proven. 334 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-15 22:04:32,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:32,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347943746] [2023-02-15 22:04:32,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347943746] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:32,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628183573] [2023-02-15 22:04:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:32,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:32,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:32,100 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 22:04:32,126 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 22:04:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:32,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 22:04:32,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:32,374 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 22:04:32,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:32,533 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 22:04:32,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628183573] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:32,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:32,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-02-15 22:04:32,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395697466] [2023-02-15 22:04:32,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:32,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 22:04:32,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:32,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 22:04:32,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-02-15 22:04:32,535 INFO L87 Difference]: Start difference. First operand 209 states and 228 transitions. Second operand has 18 states, 18 states have (on average 6.277777777777778) internal successors, (113), 18 states have internal predecessors, (113), 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 22:04:32,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:32,854 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2023-02-15 22:04:32,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 22:04:32,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.277777777777778) internal successors, (113), 18 states have internal predecessors, (113), 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 22:04:32,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:32,856 INFO L225 Difference]: With dead ends: 211 [2023-02-15 22:04:32,856 INFO L226 Difference]: Without dead ends: 211 [2023-02-15 22:04:32,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 192 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 22:04:32,858 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:32,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 89 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:04:32,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-02-15 22:04:32,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2023-02-15 22:04:32,860 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 22:04:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 226 transitions. [2023-02-15 22:04:32,861 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 226 transitions. Word has length 103 [2023-02-15 22:04:32,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:32,861 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 226 transitions. [2023-02-15 22:04:32,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.277777777777778) internal successors, (113), 18 states have internal predecessors, (113), 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 22:04:32,861 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 226 transitions. [2023-02-15 22:04:32,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-15 22:04:32,862 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:32,862 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 22:04:32,880 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 22:04:33,075 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 22:04:33,075 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 22:04:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:33,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1018520203, now seen corresponding path program 2 times [2023-02-15 22:04:33,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:33,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785429238] [2023-02-15 22:04:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:33,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-15 22:04:33,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:33,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785429238] [2023-02-15 22:04:33,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785429238] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:33,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958883259] [2023-02-15 22:04:33,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:04:33,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:33,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:33,266 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 22:04:33,269 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 22:04:33,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:04:33,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:04:33,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 22:04:33,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 40 proven. 283 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-02-15 22:04:33,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:33,965 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 25 treesize of output 21 [2023-02-15 22:04:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 40 proven. 283 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-02-15 22:04:34,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958883259] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:34,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:34,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-02-15 22:04:34,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096830725] [2023-02-15 22:04:34,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:34,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 22:04:34,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:34,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 22:04:34,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-02-15 22:04:34,090 INFO L87 Difference]: Start difference. First operand 209 states and 226 transitions. Second operand has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 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 22:04:34,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:34,452 INFO L93 Difference]: Finished difference Result 285 states and 304 transitions. [2023-02-15 22:04:34,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 22:04:34,453 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 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 22:04:34,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:34,454 INFO L225 Difference]: With dead ends: 285 [2023-02-15 22:04:34,454 INFO L226 Difference]: Without dead ends: 285 [2023-02-15 22:04:34,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2023-02-15 22:04:34,455 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 250 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:34,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 222 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:04:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-02-15 22:04:34,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 216. [2023-02-15 22:04:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.1042654028436019) internal successors, (233), 215 states have internal predecessors, (233), 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 22:04:34,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 233 transitions. [2023-02-15 22:04:34,466 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 233 transitions. Word has length 108 [2023-02-15 22:04:34,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:34,466 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 233 transitions. [2023-02-15 22:04:34,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 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 22:04:34,467 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 233 transitions. [2023-02-15 22:04:34,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-15 22:04:34,467 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:34,467 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-02-15 22:04:34,486 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 22:04:34,668 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 22:04:34,668 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:04:34,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:34,669 INFO L85 PathProgramCache]: Analyzing trace with hash 129325764, now seen corresponding path program 4 times [2023-02-15 22:04:34,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:34,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268948556] [2023-02-15 22:04:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:34,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 208 proven. 710 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-02-15 22:04:34,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:34,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268948556] [2023-02-15 22:04:34,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268948556] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:34,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164235280] [2023-02-15 22:04:34,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 22:04:34,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:34,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:34,989 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 22:04:35,010 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 22:04:35,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 22:04:35,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:04:35,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 22:04:35,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:35,547 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 22:04:35,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:35,834 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 22:04:35,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164235280] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:35,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:35,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-02-15 22:04:35,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778653403] [2023-02-15 22:04:35,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:35,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-15 22:04:35,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-15 22:04:35,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 22:04:35,837 INFO L87 Difference]: Start difference. First operand 216 states and 233 transitions. Second operand has 39 states, 39 states have (on average 5.769230769230769) internal successors, (225), 39 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 22:04:37,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:37,215 INFO L93 Difference]: Finished difference Result 415 states and 441 transitions. [2023-02-15 22:04:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-15 22:04:37,216 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.769230769230769) internal successors, (225), 39 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 121 [2023-02-15 22:04:37,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:37,217 INFO L225 Difference]: With dead ends: 415 [2023-02-15 22:04:37,217 INFO L226 Difference]: Without dead ends: 415 [2023-02-15 22:04:37,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 215 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4336 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2896, Invalid=7816, Unknown=0, NotChecked=0, Total=10712 [2023-02-15 22:04:37,220 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 599 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:37,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 134 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 22:04:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-02-15 22:04:37,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 381. [2023-02-15 22:04:37,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 376 states have (on average 1.0904255319148937) internal successors, (410), 380 states have internal predecessors, (410), 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 22:04:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 410 transitions. [2023-02-15 22:04:37,228 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 410 transitions. Word has length 121 [2023-02-15 22:04:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:37,228 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 410 transitions. [2023-02-15 22:04:37,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.769230769230769) internal successors, (225), 39 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 22:04:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 410 transitions. [2023-02-15 22:04:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-15 22:04:37,229 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:37,229 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2023-02-15 22:04:37,235 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 22:04:37,433 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 22:04:37,433 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:04:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:37,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1920952833, now seen corresponding path program 3 times [2023-02-15 22:04:37,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:37,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260544391] [2023-02-15 22:04:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:37,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 295 proven. 603 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-02-15 22:04:37,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:37,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260544391] [2023-02-15 22:04:37,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260544391] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:37,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100230233] [2023-02-15 22:04:37,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 22:04:37,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:37,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:37,699 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 22:04:37,723 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 22:04:37,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 22:04:37,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:04:37,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 22:04:37,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:37,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:04:37,818 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 22:04:37,818 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 22:04:37,828 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 22:04:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 10 proven. 413 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2023-02-15 22:04:38,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 423 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2023-02-15 22:04:39,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100230233] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:39,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:39,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 27 [2023-02-15 22:04:39,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654065553] [2023-02-15 22:04:39,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:39,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 22:04:39,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:39,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 22:04:39,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2023-02-15 22:04:39,548 INFO L87 Difference]: Start difference. First operand 381 states and 410 transitions. Second operand has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 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 22:04:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:42,278 INFO L93 Difference]: Finished difference Result 380 states and 401 transitions. [2023-02-15 22:04:42,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-15 22:04:42,279 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 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 130 [2023-02-15 22:04:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:42,280 INFO L225 Difference]: With dead ends: 380 [2023-02-15 22:04:42,280 INFO L226 Difference]: Without dead ends: 380 [2023-02-15 22:04:42,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1790, Invalid=4852, Unknown=0, NotChecked=0, Total=6642 [2023-02-15 22:04:42,282 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 242 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:42,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 97 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 22:04:42,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-02-15 22:04:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2023-02-15 22:04:42,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 376 states have (on average 1.0664893617021276) internal successors, (401), 379 states have internal predecessors, (401), 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 22:04:42,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 401 transitions. [2023-02-15 22:04:42,293 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 401 transitions. Word has length 130 [2023-02-15 22:04:42,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:42,293 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 401 transitions. [2023-02-15 22:04:42,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.111111111111111) internal successors, (138), 27 states have internal predecessors, (138), 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 22:04:42,293 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 401 transitions. [2023-02-15 22:04:42,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-02-15 22:04:42,294 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:42,294 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-15 22:04:42,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 22:04:42,495 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 22:04:42,495 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:04:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:42,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1097568675, now seen corresponding path program 3 times [2023-02-15 22:04:42,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:42,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914199551] [2023-02-15 22:04:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:42,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-02-15 22:04:42,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:42,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914199551] [2023-02-15 22:04:42,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914199551] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:42,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716998555] [2023-02-15 22:04:42,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 22:04:42,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:42,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:42,725 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 22:04:42,751 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 22:04:42,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 22:04:42,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:04:42,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 22:04:42,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:42,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:04:42,836 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 22:04:42,840 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 22:04:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2023-02-15 22:04:43,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:04:43,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716998555] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:43,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:04:43,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2023-02-15 22:04:43,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671220184] [2023-02-15 22:04:43,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:43,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:04:43,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:43,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:04:43,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:04:43,278 INFO L87 Difference]: Start difference. First operand 380 states and 401 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 22:04:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:43,314 INFO L93 Difference]: Finished difference Result 379 states and 398 transitions. [2023-02-15 22:04:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 22:04:43,314 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 149 [2023-02-15 22:04:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:43,316 INFO L225 Difference]: With dead ends: 379 [2023-02-15 22:04:43,316 INFO L226 Difference]: Without dead ends: 379 [2023-02-15 22:04:43,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:04:43,316 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:43,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 35 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:04:43,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-02-15 22:04:43,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2023-02-15 22:04:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 376 states have (on average 1.0585106382978724) internal successors, (398), 378 states have internal predecessors, (398), 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 22:04:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 398 transitions. [2023-02-15 22:04:43,322 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 398 transitions. Word has length 149 [2023-02-15 22:04:43,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:43,323 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 398 transitions. [2023-02-15 22:04:43,323 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 22:04:43,323 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 398 transitions. [2023-02-15 22:04:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-02-15 22:04:43,324 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:43,324 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:43,333 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 22:04:43,525 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 22:04:43,525 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:04:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:43,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1797778537, now seen corresponding path program 1 times [2023-02-15 22:04:43,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:43,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713788025] [2023-02-15 22:04:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:43,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-02-15 22:04:43,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:43,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713788025] [2023-02-15 22:04:43,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713788025] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:43,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346616260] [2023-02-15 22:04:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:43,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:43,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:43,792 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 22:04:43,795 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 22:04:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:43,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 22:04:43,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 0 proven. 1066 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-15 22:04:44,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 21 proven. 990 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2023-02-15 22:04:44,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346616260] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:44,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:44,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 19, 14] total 32 [2023-02-15 22:04:44,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005596633] [2023-02-15 22:04:44,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:44,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 22:04:44,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:44,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 22:04:44,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=681, Unknown=0, NotChecked=0, Total=992 [2023-02-15 22:04:44,965 INFO L87 Difference]: Start difference. First operand 379 states and 398 transitions. Second operand has 32 states, 32 states have (on average 6.6875) internal successors, (214), 32 states have internal predecessors, (214), 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 22:04:45,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:45,917 INFO L93 Difference]: Finished difference Result 596 states and 627 transitions. [2023-02-15 22:04:45,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 22:04:45,917 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.6875) internal successors, (214), 32 states have internal predecessors, (214), 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 22:04:45,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:45,919 INFO L225 Difference]: With dead ends: 596 [2023-02-15 22:04:45,920 INFO L226 Difference]: Without dead ends: 596 [2023-02-15 22:04:45,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=908, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 22:04:45,920 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 398 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:45,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 421 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 22:04:45,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-02-15 22:04:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 590. [2023-02-15 22:04:45,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 587 states have (on average 1.0681431005110733) internal successors, (627), 589 states have internal predecessors, (627), 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 22:04:45,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 627 transitions. [2023-02-15 22:04:45,929 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 627 transitions. Word has length 162 [2023-02-15 22:04:45,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:45,929 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 627 transitions. [2023-02-15 22:04:45,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.6875) internal successors, (214), 32 states have internal predecessors, (214), 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 22:04:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 627 transitions. [2023-02-15 22:04:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-02-15 22:04:45,932 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:45,933 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 48, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-15 22:04:45,941 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 22:04:46,139 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 22:04:46,139 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 22:04:46,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:46,140 INFO L85 PathProgramCache]: Analyzing trace with hash 763391400, now seen corresponding path program 5 times [2023-02-15 22:04:46,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:46,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609866951] [2023-02-15 22:04:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:46,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 3902 proven. 971 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2023-02-15 22:04:46,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:46,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609866951] [2023-02-15 22:04:46,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609866951] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:46,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075608840] [2023-02-15 22:04:46,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 22:04:46,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:46,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:46,648 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 22:04:46,676 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 22:04:47,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-15 22:04:47,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:04:47,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 22:04:47,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:47,473 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 22:04:47,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:47,730 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 22:04:47,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075608840] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:47,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:47,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 29 [2023-02-15 22:04:47,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659206918] [2023-02-15 22:04:47,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:47,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 22:04:47,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:47,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 22:04:47,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2023-02-15 22:04:47,734 INFO L87 Difference]: Start difference. First operand 590 states and 627 transitions. Second operand has 29 states, 29 states have (on average 6.275862068965517) internal successors, (182), 29 states have internal predecessors, (182), 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 22:04:48,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:48,733 INFO L93 Difference]: Finished difference Result 590 states and 620 transitions. [2023-02-15 22:04:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-15 22:04:48,733 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.275862068965517) internal successors, (182), 29 states have internal predecessors, (182), 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 22:04:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:48,735 INFO L225 Difference]: With dead ends: 590 [2023-02-15 22:04:48,735 INFO L226 Difference]: Without dead ends: 590 [2023-02-15 22:04:48,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 580 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=877, Invalid=3029, Unknown=0, NotChecked=0, Total=3906 [2023-02-15 22:04:48,738 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 135 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:48,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 104 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 22:04:48,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-02-15 22:04:48,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2023-02-15 22:04:48,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 587 states have (on average 1.0562180579216354) internal successors, (620), 589 states have internal predecessors, (620), 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 22:04:48,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 620 transitions. [2023-02-15 22:04:48,753 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 620 transitions. Word has length 301 [2023-02-15 22:04:48,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:48,753 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 620 transitions. [2023-02-15 22:04:48,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.275862068965517) internal successors, (182), 29 states have internal predecessors, (182), 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 22:04:48,753 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 620 transitions. [2023-02-15 22:04:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-02-15 22:04:48,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:48,759 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 51, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-15 22:04:48,767 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 22:04:48,967 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 22:04:48,967 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 22:04:48,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:48,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1134310783, now seen corresponding path program 6 times [2023-02-15 22:04:48,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:48,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571783043] [2023-02-15 22:04:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:48,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4599 proven. 1453 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2023-02-15 22:04:49,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:49,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571783043] [2023-02-15 22:04:49,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571783043] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:49,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167110421] [2023-02-15 22:04:49,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 22:04:49,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:49,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:49,547 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 22:04:49,569 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 22:04:51,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-02-15 22:04:51,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:04:51,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 22:04:51,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:51,496 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 22:04:51,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:51,873 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 22:04:51,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167110421] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:51,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:51,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 29 [2023-02-15 22:04:51,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908009000] [2023-02-15 22:04:51,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:51,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 22:04:51,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:51,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 22:04:51,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2023-02-15 22:04:51,877 INFO L87 Difference]: Start difference. First operand 590 states and 620 transitions. Second operand has 29 states, 29 states have (on average 7.068965517241379) internal successors, (205), 29 states have internal predecessors, (205), 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 22:04:52,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:52,784 INFO L93 Difference]: Finished difference Result 590 states and 609 transitions. [2023-02-15 22:04:52,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-15 22:04:52,784 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 7.068965517241379) internal successors, (205), 29 states have internal predecessors, (205), 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 22:04:52,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:52,786 INFO L225 Difference]: With dead ends: 590 [2023-02-15 22:04:52,786 INFO L226 Difference]: Without dead ends: 590 [2023-02-15 22:04:52,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 607 SyntacticMatches, 13 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1433, Invalid=3823, Unknown=0, NotChecked=0, Total=5256 [2023-02-15 22:04:52,788 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 120 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:52,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 217 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 22:04:52,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-02-15 22:04:52,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2023-02-15 22:04:52,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 587 states have (on average 1.0374787052810903) internal successors, (609), 589 states have internal predecessors, (609), 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 22:04:52,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 609 transitions. [2023-02-15 22:04:52,796 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 609 transitions. Word has length 316 [2023-02-15 22:04:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:52,797 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 609 transitions. [2023-02-15 22:04:52,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.068965517241379) internal successors, (205), 29 states have internal predecessors, (205), 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 22:04:52,797 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 609 transitions. [2023-02-15 22:04:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-02-15 22:04:52,800 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:52,801 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 54, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-02-15 22:04:52,811 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 22:04:53,009 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 22:04:53,009 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 22:04:53,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:53,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1065134024, now seen corresponding path program 7 times [2023-02-15 22:04:53,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:53,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026633179] [2023-02-15 22:04:53,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:53,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 243 proven. 7020 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2023-02-15 22:04:53,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:53,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026633179] [2023-02-15 22:04:53,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026633179] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:53,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205583061] [2023-02-15 22:04:53,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 22:04:53,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:53,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:53,855 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 22:04:53,858 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 22:04:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:54,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 22:04:54,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:54,689 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 22:04:54,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:55,169 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 22:04:55,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205583061] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:55,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:55,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2023-02-15 22:04:55,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465807016] [2023-02-15 22:04:55,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:55,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 22:04:55,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:55,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 22:04:55,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 22:04:55,171 INFO L87 Difference]: Start difference. First operand 590 states and 609 transitions. Second operand has 35 states, 35 states have (on average 6.3428571428571425) internal successors, (222), 35 states have internal predecessors, (222), 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 22:04:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:56,698 INFO L93 Difference]: Finished difference Result 574 states and 586 transitions. [2023-02-15 22:04:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-15 22:04:56,699 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.3428571428571425) internal successors, (222), 35 states have internal predecessors, (222), 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 22:04:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:56,701 INFO L225 Difference]: With dead ends: 574 [2023-02-15 22:04:56,701 INFO L226 Difference]: Without dead ends: 574 [2023-02-15 22:04:56,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 630 SyntacticMatches, 19 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4803 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2797, Invalid=10543, Unknown=0, NotChecked=0, Total=13340 [2023-02-15 22:04:56,706 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 608 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:56,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 166 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 22:04:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-02-15 22:04:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 568. [2023-02-15 22:04:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 565 states have (on average 1.0265486725663717) internal successors, (580), 567 states have internal predecessors, (580), 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 22:04:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 580 transitions. [2023-02-15 22:04:56,713 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 580 transitions. Word has length 331 [2023-02-15 22:04:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:56,714 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 580 transitions. [2023-02-15 22:04:56,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.3428571428571425) internal successors, (222), 35 states have internal predecessors, (222), 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 22:04:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 580 transitions. [2023-02-15 22:04:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2023-02-15 22:04:56,716 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:56,716 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 63, 63, 63, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-15 22:04:56,723 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 22:04:56,923 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 22:04:56,923 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 22:04:56,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:56,924 INFO L85 PathProgramCache]: Analyzing trace with hash 223876524, now seen corresponding path program 8 times [2023-02-15 22:04:56,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:56,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114856153] [2023-02-15 22:04:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:56,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10728 backedges. 7020 proven. 2819 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2023-02-15 22:04:57,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:57,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114856153] [2023-02-15 22:04:57,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114856153] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:57,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970681444] [2023-02-15 22:04:57,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:04:57,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:57,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:57,757 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 22:04:57,784 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 22:04:58,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:04:58,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:04:58,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 22:04:58,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10728 backedges. 7546 proven. 2293 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2023-02-15 22:04:58,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10728 backedges. 7546 proven. 2293 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2023-02-15 22:04:58,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970681444] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:58,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:58,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 33 [2023-02-15 22:04:58,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631035430] [2023-02-15 22:04:58,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:58,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 22:04:58,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:58,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 22:04:58,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 22:04:58,949 INFO L87 Difference]: Start difference. First operand 568 states and 580 transitions. Second operand has 33 states, 33 states have (on average 6.757575757575758) internal successors, (223), 33 states have internal predecessors, (223), 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 22:05:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:05:00,125 INFO L93 Difference]: Finished difference Result 574 states and 582 transitions. [2023-02-15 22:05:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-15 22:05:00,126 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.757575757575758) internal successors, (223), 33 states have internal predecessors, (223), 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 383 [2023-02-15 22:05:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:05:00,127 INFO L225 Difference]: With dead ends: 574 [2023-02-15 22:05:00,128 INFO L226 Difference]: Without dead ends: 574 [2023-02-15 22:05:00,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 737 SyntacticMatches, 17 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2014, Invalid=5642, Unknown=0, NotChecked=0, Total=7656 [2023-02-15 22:05:00,129 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 108 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 22:05:00,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 251 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 22:05:00,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-02-15 22:05:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 568. [2023-02-15 22:05:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 565 states have (on average 1.0194690265486726) internal successors, (576), 567 states have internal predecessors, (576), 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 22:05:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 576 transitions. [2023-02-15 22:05:00,142 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 576 transitions. Word has length 383 [2023-02-15 22:05:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:05:00,143 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 576 transitions. [2023-02-15 22:05:00,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.757575757575758) internal successors, (223), 33 states have internal predecessors, (223), 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 22:05:00,143 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 576 transitions. [2023-02-15 22:05:00,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-02-15 22:05:00,145 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:05:00,145 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-15 22:05:00,156 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 22:05:00,353 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 22:05:00,353 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:05:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:05:00,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1903304557, now seen corresponding path program 9 times [2023-02-15 22:05:00,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:05:00,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327514443] [2023-02-15 22:05:00,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:05:00,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:05:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:05:00,932 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 22:05:00,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:05:00,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327514443] [2023-02-15 22:05:00,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327514443] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:05:00,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793198420] [2023-02-15 22:05:00,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 22:05:00,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:05:00,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:05:00,937 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 22:05:00,940 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 22:05:01,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-15 22:05:01,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:05:01,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 22:05:01,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:05:01,352 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 22:05:01,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:05:01,631 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 22:05:01,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793198420] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:05:01,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:05:01,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-02-15 22:05:01,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549921222] [2023-02-15 22:05:01,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:05:01,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 22:05:01,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:05:01,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 22:05:01,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2023-02-15 22:05:01,634 INFO L87 Difference]: Start difference. First operand 568 states and 576 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 22:05:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:05:04,536 INFO L93 Difference]: Finished difference Result 1608 states and 1686 transitions. [2023-02-15 22:05:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 22:05:04,539 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 22:05:04,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:05:04,543 INFO L225 Difference]: With dead ends: 1608 [2023-02-15 22:05:04,543 INFO L226 Difference]: Without dead ends: 1608 [2023-02-15 22:05:04,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 771 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 22:05:04,544 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 1192 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 703 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 22:05:04,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1192 Valid, 703 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 22:05:04,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2023-02-15 22:05:04,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 745. [2023-02-15 22:05:04,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 742 states have (on average 1.1078167115902966) internal successors, (822), 744 states have internal predecessors, (822), 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 22:05:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 822 transitions. [2023-02-15 22:05:04,558 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 822 transitions. Word has length 388 [2023-02-15 22:05:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:05:04,559 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 822 transitions. [2023-02-15 22:05:04,559 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 22:05:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 822 transitions. [2023-02-15 22:05:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-02-15 22:05:04,561 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:05:04,561 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-15 22:05:04,571 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 22:05:04,767 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 22:05:04,768 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:05:04,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:05:04,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1127100931, now seen corresponding path program 2 times [2023-02-15 22:05:04,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:05:04,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126331610] [2023-02-15 22:05:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:05:04,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:05:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:05:05,845 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 22:05:05,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:05:05,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126331610] [2023-02-15 22:05:05,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126331610] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:05:05,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141077922] [2023-02-15 22:05:05,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:05:05,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:05:05,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:05:05,847 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 22:05:05,850 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 22:05:06,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:05:06,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:05:06,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-15 22:05:06,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:05:06,165 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 22:05:06,166 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 22:05:07,216 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 22:05:07,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:05:08,355 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 22:05:08,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141077922] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:05:08,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:05:08,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2023-02-15 22:05:08,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406369756] [2023-02-15 22:05:08,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:05:08,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 22:05:08,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:05:08,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 22:05:08,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 22:05:08,357 INFO L87 Difference]: Start difference. First operand 745 states and 822 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 22:05:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:05:10,033 INFO L93 Difference]: Finished difference Result 1600 states and 1656 transitions. [2023-02-15 22:05:10,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-15 22:05:10,033 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 22:05:10,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:05:10,037 INFO L225 Difference]: With dead ends: 1600 [2023-02-15 22:05:10,037 INFO L226 Difference]: Without dead ends: 1600 [2023-02-15 22:05:10,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 754 SyntacticMatches, 1 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 22:05:10,038 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1278 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 22:05:10,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1278 Valid, 739 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 22:05:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2023-02-15 22:05:10,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 748. [2023-02-15 22:05:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 745 states have (on average 1.0630872483221476) internal successors, (792), 747 states have internal predecessors, (792), 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 22:05:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 792 transitions. [2023-02-15 22:05:10,051 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 792 transitions. Word has length 389 [2023-02-15 22:05:10,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:05:10,052 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 792 transitions. [2023-02-15 22:05:10,052 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 22:05:10,053 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 792 transitions. [2023-02-15 22:05:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-02-15 22:05:10,055 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:05:10,055 INFO L195 NwaCegarLoop]: trace histogram [77, 76, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2023-02-15 22:05:10,068 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 22:05:10,262 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 22:05:10,262 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:05:10,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:05:10,263 INFO L85 PathProgramCache]: Analyzing trace with hash -205352877, now seen corresponding path program 10 times [2023-02-15 22:05:10,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:05:10,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27785346] [2023-02-15 22:05:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:05:10,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:05:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:05:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 1147 proven. 13330 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2023-02-15 22:05:11,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:05:11,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27785346] [2023-02-15 22:05:11,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27785346] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:05:11,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850743349] [2023-02-15 22:05:11,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 22:05:11,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:05:11,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:05:11,819 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 22:05:11,826 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 22:05:12,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 22:05:12,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:05:12,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 1338 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 22:05:12,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:05:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 1253 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2023-02-15 22:05:13,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:05:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 1253 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2023-02-15 22:05:14,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850743349] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:05:14,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:05:14,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 81 [2023-02-15 22:05:14,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020613607] [2023-02-15 22:05:14,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:05:14,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-02-15 22:05:14,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:05:14,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-02-15 22:05:14,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1725, Invalid=4755, Unknown=0, NotChecked=0, Total=6480 [2023-02-15 22:05:14,602 INFO L87 Difference]: Start difference. First operand 748 states and 792 transitions. Second operand has 81 states, 81 states have (on average 6.407407407407407) internal successors, (519), 81 states have internal predecessors, (519), 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 22:05:22,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:05:22,288 INFO L93 Difference]: Finished difference Result 1561 states and 1666 transitions. [2023-02-15 22:05:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2023-02-15 22:05:22,289 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 6.407407407407407) internal successors, (519), 81 states have internal predecessors, (519), 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 22:05:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:05:22,292 INFO L225 Difference]: With dead ends: 1561 [2023-02-15 22:05:22,292 INFO L226 Difference]: Without dead ends: 1561 [2023-02-15 22:05:22,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1211 GetRequests, 839 SyntacticMatches, 11 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70107 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=37124, Invalid=94282, Unknown=0, NotChecked=0, Total=131406 [2023-02-15 22:05:22,300 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1494 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 2702 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 22:05:22,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1494 Valid, 254 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2702 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 22:05:22,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2023-02-15 22:05:22,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1511. [2023-02-15 22:05:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1508 states have (on average 1.0669761273209548) internal successors, (1609), 1510 states have internal predecessors, (1609), 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 22:05:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1609 transitions. [2023-02-15 22:05:22,317 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1609 transitions. Word has length 448 [2023-02-15 22:05:22,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:05:22,317 INFO L495 AbstractCegarLoop]: Abstraction has 1511 states and 1609 transitions. [2023-02-15 22:05:22,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 6.407407407407407) internal successors, (519), 81 states have internal predecessors, (519), 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 22:05:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1609 transitions. [2023-02-15 22:05:22,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2023-02-15 22:05:22,321 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:05:22,321 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 84, 84, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:05:22,335 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 22:05:22,529 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 22:05:22,530 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:05:22,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:05:22,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1728592905, now seen corresponding path program 2 times [2023-02-15 22:05:22,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:05:22,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328072602] [2023-02-15 22:05:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:05:22,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:05:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:05:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 19188 backedges. 13291 proven. 3733 refuted. 0 times theorem prover too weak. 2164 trivial. 0 not checked. [2023-02-15 22:05:23,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:05:23,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328072602] [2023-02-15 22:05:23,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328072602] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:05:23,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399309805] [2023-02-15 22:05:23,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:05:23,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:05:23,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:05:23,724 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 22:05:23,726 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 22:05:23,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-15 22:05:23,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:05:23,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 22:05:23,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:05:26,556 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_2168 Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33| 1))) (and (= 0 (select .cse0 |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|)) (= |c_#valid| (store (store (store .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_28| v_ArrVal_2168) |v_ULTIMATE.start_main_~#b~0#1.base_33| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_28| 0))))) is different from true [2023-02-15 22:05:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 19188 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19188 trivial. 0 not checked. [2023-02-15 22:05:26,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:05:26,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399309805] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:05:26,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:05:26,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [23] total 25 [2023-02-15 22:05:26,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397999632] [2023-02-15 22:05:26,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:05:26,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:05:26,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:05:26,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:05:26,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=417, Unknown=1, NotChecked=44, Total=600 [2023-02-15 22:05:26,564 INFO L87 Difference]: Start difference. First operand 1511 states and 1609 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 22:05:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:05:26,577 INFO L93 Difference]: Finished difference Result 1510 states and 1608 transitions. [2023-02-15 22:05:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:05:26,577 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 559 [2023-02-15 22:05:26,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:05:26,581 INFO L225 Difference]: With dead ends: 1510 [2023-02-15 22:05:26,581 INFO L226 Difference]: Without dead ends: 1458 [2023-02-15 22:05:26,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=417, Unknown=1, NotChecked=44, Total=600 [2023-02-15 22:05:26,582 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 22:05:26,582 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 22:05:26,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2023-02-15 22:05:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1458. [2023-02-15 22:05:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1456 states have (on average 1.0625) internal successors, (1547), 1457 states have internal predecessors, (1547), 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 22:05:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 1547 transitions. [2023-02-15 22:05:26,597 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 1547 transitions. Word has length 559 [2023-02-15 22:05:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:05:26,597 INFO L495 AbstractCegarLoop]: Abstraction has 1458 states and 1547 transitions. [2023-02-15 22:05:26,598 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 22:05:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 1547 transitions. [2023-02-15 22:05:26,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1076 [2023-02-15 22:05:26,606 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:05:26,607 INFO L195 NwaCegarLoop]: trace histogram [187, 186, 186, 186, 186, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2023-02-15 22:05:26,612 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 22:05:26,812 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 22:05:26,813 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-02-15 22:05:26,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:05:26,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1348735048, now seen corresponding path program 11 times [2023-02-15 22:05:26,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:05:26,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079513188] [2023-02-15 22:05:26,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:05:26,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:05:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:05:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 91487 backedges. 48121 proven. 3733 refuted. 0 times theorem prover too weak. 39633 trivial. 0 not checked. [2023-02-15 22:05:28,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:05:28,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079513188] [2023-02-15 22:05:28,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079513188] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:05:28,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953178788] [2023-02-15 22:05:28,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 22:05:28,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:05:28,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:05:28,957 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 22:05:28,959 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 22:05:36,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-02-15 22:05:36,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:05:36,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 22:05:36,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:05:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 91487 backedges. 48255 proven. 3482 refuted. 0 times theorem prover too weak. 39750 trivial. 0 not checked. [2023-02-15 22:05:37,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:05:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 91487 backedges. 49141 proven. 2596 refuted. 0 times theorem prover too weak. 39750 trivial. 0 not checked. [2023-02-15 22:05:37,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953178788] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:05:37,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:05:37,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 45 [2023-02-15 22:05:37,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220346079] [2023-02-15 22:05:37,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:05:37,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 22:05:37,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:05:37,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 22:05:37,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 22:05:37,631 INFO L87 Difference]: Start difference. First operand 1458 states and 1547 transitions. Second operand has 45 states, 45 states have (on average 6.444444444444445) internal successors, (290), 45 states have internal predecessors, (290), 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 22:05:40,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:05:40,006 INFO L93 Difference]: Finished difference Result 1458 states and 1535 transitions. [2023-02-15 22:05:40,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-02-15 22:05:40,007 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.444444444444445) internal successors, (290), 45 states have internal predecessors, (290), 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 1075 [2023-02-15 22:05:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:05:40,011 INFO L225 Difference]: With dead ends: 1458 [2023-02-15 22:05:40,011 INFO L226 Difference]: Without dead ends: 1458 [2023-02-15 22:05:40,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2251 GetRequests, 2113 SyntacticMatches, 16 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3980 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3298, Invalid=11954, Unknown=0, NotChecked=0, Total=15252 [2023-02-15 22:05:40,012 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 146 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 22:05:40,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 192 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 22:05:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2023-02-15 22:05:40,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1458. [2023-02-15 22:05:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1456 states have (on average 1.0542582417582418) internal successors, (1535), 1457 states have internal predecessors, (1535), 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 22:05:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 1535 transitions. [2023-02-15 22:05:40,026 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 1535 transitions. Word has length 1075 [2023-02-15 22:05:40,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:05:40,027 INFO L495 AbstractCegarLoop]: Abstraction has 1458 states and 1535 transitions. [2023-02-15 22:05:40,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.444444444444445) internal successors, (290), 45 states have internal predecessors, (290), 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 22:05:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 1535 transitions. [2023-02-15 22:05:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1131 [2023-02-15 22:05:40,037 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:05:40,037 INFO L195 NwaCegarLoop]: trace histogram [198, 197, 197, 197, 197, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2023-02-15 22:05:40,051 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 22:05:40,248 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 22:05:40,248 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 22:05:40,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:05:40,249 INFO L85 PathProgramCache]: Analyzing trace with hash 502793343, now seen corresponding path program 12 times [2023-02-15 22:05:40,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:05:40,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144453063] [2023-02-15 22:05:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:05:40,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:05:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:05:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 102234 backedges. 58302 proven. 4821 refuted. 0 times theorem prover too weak. 39111 trivial. 0 not checked. [2023-02-15 22:05:42,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:05:42,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144453063] [2023-02-15 22:05:42,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144453063] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:05:42,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021961605] [2023-02-15 22:05:42,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 22:05:42,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:05:42,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:05:42,461 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 22:05:42,464 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 22:05:43,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2023-02-15 22:05:43,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:05:43,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 22:05:43,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:05:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 102234 backedges. 9530 proven. 20532 refuted. 0 times theorem prover too weak. 72172 trivial. 0 not checked. [2023-02-15 22:05:45,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:05:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 102234 backedges. 0 proven. 30062 refuted. 0 times theorem prover too weak. 72172 trivial. 0 not checked. [2023-02-15 22:05:47,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021961605] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:05:47,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:05:47,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 65 [2023-02-15 22:05:47,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598831512] [2023-02-15 22:05:47,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:05:47,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-15 22:05:47,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:05:47,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-15 22:05:47,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=685, Invalid=3475, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 22:05:47,292 INFO L87 Difference]: Start difference. First operand 1458 states and 1535 transitions. Second operand has 65 states, 65 states have (on average 5.753846153846154) internal successors, (374), 65 states have internal predecessors, (374), 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 22:06:07,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:06:07,547 INFO L93 Difference]: Finished difference Result 1663 states and 1744 transitions. [2023-02-15 22:06:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2023-02-15 22:06:07,547 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.753846153846154) internal successors, (374), 65 states have internal predecessors, (374), 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 1130 [2023-02-15 22:06:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:06:07,550 INFO L225 Difference]: With dead ends: 1663 [2023-02-15 22:06:07,550 INFO L226 Difference]: Without dead ends: 1663 [2023-02-15 22:06:07,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2542 GetRequests, 2220 SyntacticMatches, 0 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38532 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=20521, Invalid=84131, Unknown=0, NotChecked=0, Total=104652 [2023-02-15 22:06:07,559 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1860 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 2438 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1860 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:06:07,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1860 Valid, 209 Invalid, 2621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2438 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 22:06:07,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2023-02-15 22:06:07,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1593. [2023-02-15 22:06:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1591 states have (on average 1.0546825895663106) internal successors, (1678), 1592 states have internal predecessors, (1678), 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 22:06:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 1678 transitions. [2023-02-15 22:06:07,575 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 1678 transitions. Word has length 1130 [2023-02-15 22:06:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:06:07,576 INFO L495 AbstractCegarLoop]: Abstraction has 1593 states and 1678 transitions. [2023-02-15 22:06:07,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.753846153846154) internal successors, (374), 65 states have internal predecessors, (374), 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 22:06:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 1678 transitions. [2023-02-15 22:06:07,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1182 [2023-02-15 22:06:07,587 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:06:07,587 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 207, 207, 207, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2023-02-15 22:06:07,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-02-15 22:06:07,795 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 22:06:07,795 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 22:06:07,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:06:07,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2030221151, now seen corresponding path program 3 times [2023-02-15 22:06:07,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:06:07,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540538333] [2023-02-15 22:06:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:06:07,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:06:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:06:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 112736 backedges. 69066 proven. 6098 refuted. 0 times theorem prover too weak. 37572 trivial. 0 not checked. [2023-02-15 22:06:09,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:06:09,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540538333] [2023-02-15 22:06:09,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540538333] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:06:09,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915122736] [2023-02-15 22:06:09,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 22:06:09,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:06:09,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:06:09,983 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 22:06:09,985 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 22:06:10,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 22:06:10,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:06:10,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 22:06:10,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:06:10,293 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 22:06:10,293 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 22:06:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 112736 backedges. 108 proven. 21365 refuted. 0 times theorem prover too weak. 91263 trivial. 0 not checked. [2023-02-15 22:06:13,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:06:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 112736 backedges. 0 proven. 21473 refuted. 0 times theorem prover too weak. 91263 trivial. 0 not checked. [2023-02-15 22:06:19,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915122736] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:06:19,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:06:19,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 6, 6] total 37 [2023-02-15 22:06:19,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404082169] [2023-02-15 22:06:19,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:06:19,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 22:06:19,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:06:19,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 22:06:19,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 22:06:19,335 INFO L87 Difference]: Start difference. First operand 1593 states and 1678 transitions. Second operand has 37 states, 37 states have (on average 7.0) internal successors, (259), 37 states have internal predecessors, (259), 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 22:06:25,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:06:25,248 INFO L93 Difference]: Finished difference Result 1592 states and 1663 transitions. [2023-02-15 22:06:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2023-02-15 22:06:25,248 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 7.0) internal successors, (259), 37 states have internal predecessors, (259), 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 1181 [2023-02-15 22:06:25,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:06:25,252 INFO L225 Difference]: With dead ends: 1592 [2023-02-15 22:06:25,252 INFO L226 Difference]: Without dead ends: 1592 [2023-02-15 22:06:25,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2567 GetRequests, 2352 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14408 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=12263, Invalid=34609, Unknown=0, NotChecked=0, Total=46872 [2023-02-15 22:06:25,254 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 155 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 22:06:25,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 279 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 22:06:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2023-02-15 22:06:25,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2023-02-15 22:06:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0452545568824638) internal successors, (1663), 1591 states have internal predecessors, (1663), 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 22:06:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1663 transitions. [2023-02-15 22:06:25,269 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1663 transitions. Word has length 1181 [2023-02-15 22:06:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:06:25,270 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1663 transitions. [2023-02-15 22:06:25,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 7.0) internal successors, (259), 37 states have internal predecessors, (259), 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 22:06:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1663 transitions. [2023-02-15 22:06:25,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1353 [2023-02-15 22:06:25,283 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:06:25,284 INFO L195 NwaCegarLoop]: trace histogram [241, 240, 240, 240, 240, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-15 22:06:25,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-15 22:06:25,489 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 22:06:25,490 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 22:06:25,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:06:25,490 INFO L85 PathProgramCache]: Analyzing trace with hash 496562611, now seen corresponding path program 13 times [2023-02-15 22:06:25,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:06:25,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423630672] [2023-02-15 22:06:25,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:06:25,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:06:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:06:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 150432 backedges. 92741 proven. 7579 refuted. 0 times theorem prover too weak. 50112 trivial. 0 not checked. [2023-02-15 22:06:27,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:06:27,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423630672] [2023-02-15 22:06:27,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423630672] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:06:27,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35109506] [2023-02-15 22:06:27,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 22:06:27,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:06:27,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:06:27,924 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 22:06:27,926 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 22:06:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:06:28,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 3866 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 22:06:28,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:06:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 150432 backedges. 93809 proven. 6511 refuted. 0 times theorem prover too weak. 50112 trivial. 0 not checked. [2023-02-15 22:06:29,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:06:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 150432 backedges. 93809 proven. 6511 refuted. 0 times theorem prover too weak. 50112 trivial. 0 not checked. [2023-02-15 22:06:30,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35109506] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:06:30,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:06:30,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 45 [2023-02-15 22:06:30,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570318561] [2023-02-15 22:06:30,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:06:30,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 22:06:30,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:06:30,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 22:06:30,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1499, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 22:06:30,139 INFO L87 Difference]: Start difference. First operand 1592 states and 1663 transitions. Second operand has 45 states, 45 states have (on average 6.933333333333334) internal successors, (312), 45 states have internal predecessors, (312), 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 22:06:32,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:06:32,194 INFO L93 Difference]: Finished difference Result 1592 states and 1653 transitions. [2023-02-15 22:06:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-02-15 22:06:32,194 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.933333333333334) internal successors, (312), 45 states have internal predecessors, (312), 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 1352 [2023-02-15 22:06:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:06:32,199 INFO L225 Difference]: With dead ends: 1592 [2023-02-15 22:06:32,199 INFO L226 Difference]: Without dead ends: 1592 [2023-02-15 22:06:32,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2836 GetRequests, 2663 SyntacticMatches, 25 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7404 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6106, Invalid=16244, Unknown=0, NotChecked=0, Total=22350 [2023-02-15 22:06:32,202 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 96 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 22:06:32,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 466 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1743 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 22:06:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2023-02-15 22:06:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2023-02-15 22:06:32,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0389692017598995) internal successors, (1653), 1591 states have internal predecessors, (1653), 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 22:06:32,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1653 transitions. [2023-02-15 22:06:32,217 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1653 transitions. Word has length 1352 [2023-02-15 22:06:32,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:06:32,218 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1653 transitions. [2023-02-15 22:06:32,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.933333333333334) internal successors, (312), 45 states have internal predecessors, (312), 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 22:06:32,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1653 transitions. [2023-02-15 22:06:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1393 [2023-02-15 22:06:32,232 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:06:32,232 INFO L195 NwaCegarLoop]: trace histogram [249, 248, 248, 248, 248, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-15 22:06:32,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-15 22:06:32,444 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 22:06:32,444 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 22:06:32,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:06:32,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2061280083, now seen corresponding path program 14 times [2023-02-15 22:06:32,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:06:32,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127629219] [2023-02-15 22:06:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:06:32,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:06:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:06:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 160356 backedges. 105407 proven. 9279 refuted. 0 times theorem prover too weak. 45670 trivial. 0 not checked. [2023-02-15 22:06:35,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:06:35,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127629219] [2023-02-15 22:06:35,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127629219] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:06:35,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643054427] [2023-02-15 22:06:35,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:06:35,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:06:35,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:06:35,216 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 22:06:35,217 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 22:06:35,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:06:35,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:06:35,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 3970 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 22:06:35,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:06:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 160356 backedges. 106638 proven. 8048 refuted. 0 times theorem prover too weak. 45670 trivial. 0 not checked. [2023-02-15 22:06:36,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:06:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 160356 backedges. 106638 proven. 8048 refuted. 0 times theorem prover too weak. 45670 trivial. 0 not checked. [2023-02-15 22:06:37,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643054427] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:06:37,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:06:37,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 48 [2023-02-15 22:06:37,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983905456] [2023-02-15 22:06:37,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:06:37,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 22:06:37,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:06:37,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 22:06:37,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1711, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 22:06:37,631 INFO L87 Difference]: Start difference. First operand 1592 states and 1653 transitions. Second operand has 48 states, 48 states have (on average 6.958333333333333) internal successors, (334), 48 states have internal predecessors, (334), 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 22:06:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:06:40,009 INFO L93 Difference]: Finished difference Result 1592 states and 1644 transitions. [2023-02-15 22:06:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2023-02-15 22:06:40,009 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.958333333333333) internal successors, (334), 48 states have internal predecessors, (334), 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 1392 [2023-02-15 22:06:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:06:40,013 INFO L225 Difference]: With dead ends: 1592 [2023-02-15 22:06:40,013 INFO L226 Difference]: Without dead ends: 1592 [2023-02-15 22:06:40,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2933 GetRequests, 2740 SyntacticMatches, 27 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9417 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7729, Invalid=20327, Unknown=0, NotChecked=0, Total=28056 [2023-02-15 22:06:40,016 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 102 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 22:06:40,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 294 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 22:06:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2023-02-15 22:06:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2023-02-15 22:06:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0333123821495915) internal successors, (1644), 1591 states have internal predecessors, (1644), 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 22:06:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1644 transitions. [2023-02-15 22:06:40,030 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1644 transitions. Word has length 1392 [2023-02-15 22:06:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:06:40,031 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1644 transitions. [2023-02-15 22:06:40,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.958333333333333) internal successors, (334), 48 states have internal predecessors, (334), 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 22:06:40,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1644 transitions. [2023-02-15 22:06:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1428 [2023-02-15 22:06:40,045 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:06:40,046 INFO L195 NwaCegarLoop]: trace histogram [256, 255, 255, 255, 255, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2023-02-15 22:06:40,064 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 22:06:40,256 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 22:06:40,257 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 22:06:40,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:06:40,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1973398196, now seen corresponding path program 15 times [2023-02-15 22:06:40,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:06:40,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372569267] [2023-02-15 22:06:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:06:40,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:06:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:06:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 169302 backedges. 117755 proven. 11213 refuted. 0 times theorem prover too weak. 40334 trivial. 0 not checked. [2023-02-15 22:06:43,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:06:43,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372569267] [2023-02-15 22:06:43,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372569267] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:06:43,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564693849] [2023-02-15 22:06:43,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 22:06:43,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:06:43,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:06:43,136 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 22:06:43,138 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 22:06:44,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-02-15 22:06:44,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:06:44,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-15 22:06:44,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:06:44,717 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-02-15 22:06:44,717 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 22:06:48,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-15 22:06:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 169302 backedges. 0 proven. 27778 refuted. 0 times theorem prover too weak. 141524 trivial. 0 not checked. [2023-02-15 22:06:48,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:06:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 169302 backedges. 26579 proven. 1199 refuted. 0 times theorem prover too weak. 141524 trivial. 0 not checked. [2023-02-15 22:06:51,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564693849] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:06:51,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:06:51,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26, 26] total 83 [2023-02-15 22:06:51,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899082550] [2023-02-15 22:06:51,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:06:51,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-02-15 22:06:51,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:06:51,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-02-15 22:06:51,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=989, Invalid=5817, Unknown=0, NotChecked=0, Total=6806 [2023-02-15 22:06:51,379 INFO L87 Difference]: Start difference. First operand 1592 states and 1644 transitions. Second operand has 83 states, 83 states have (on average 6.168674698795181) internal successors, (512), 83 states have internal predecessors, (512), 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)