./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/tree_max.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 13:09:21,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 13:09:21,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 13:09:21,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 13:09:21,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 13:09:21,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 13:09:21,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 13:09:21,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 13:09:21,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 13:09:21,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 13:09:21,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 13:09:21,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 13:09:21,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 13:09:21,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 13:09:21,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 13:09:21,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 13:09:21,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 13:09:21,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 13:09:21,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 13:09:21,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 13:09:21,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 13:09:21,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 13:09:21,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 13:09:21,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 13:09:21,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 13:09:21,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 13:09:21,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 13:09:21,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 13:09:21,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 13:09:21,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 13:09:21,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 13:09:21,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 13:09:21,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 13:09:21,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 13:09:21,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 13:09:21,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 13:09:21,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 13:09:21,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 13:09:21,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 13:09:21,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 13:09:21,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 13:09:21,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 13:09:21,974 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 13:09:21,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 13:09:21,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 13:09:21,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 13:09:21,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 13:09:21,980 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 13:09:21,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 13:09:21,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 13:09:21,981 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 13:09:21,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 13:09:21,982 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 13:09:21,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 13:09:21,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 13:09:21,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 13:09:21,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 13:09:21,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 13:09:21,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 13:09:21,983 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 13:09:21,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 13:09:21,983 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 13:09:21,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 13:09:21,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 13:09:21,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 13:09:21,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 13:09:21,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:09:21,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 13:09:21,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 13:09:21,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 13:09:21,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 13:09:21,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 13:09:21,985 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 13:09:21,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 13:09:21,985 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 13:09:21,985 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 13:09:21,985 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 13:09:21,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2023-02-14 13:09:22,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 13:09:22,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 13:09:22,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 13:09:22,189 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 13:09:22,189 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 13:09:22,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max.c [2023-02-14 13:09:23,145 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 13:09:23,289 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 13:09:23,290 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2023-02-14 13:09:23,293 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f444dfe3e/6ba6c36cd04c49dc87fbb5bec52b5bde/FLAGa1a1c60ae [2023-02-14 13:09:23,302 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f444dfe3e/6ba6c36cd04c49dc87fbb5bec52b5bde [2023-02-14 13:09:23,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 13:09:23,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 13:09:23,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 13:09:23,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 13:09:23,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 13:09:23,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:09:23" (1/1) ... [2023-02-14 13:09:23,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f83a368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:09:23, skipping insertion in model container [2023-02-14 13:09:23,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:09:23" (1/1) ... [2023-02-14 13:09:23,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 13:09:23,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:09:23,403 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2023-02-14 13:09:23,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:09:23,421 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 13:09:23,429 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2023-02-14 13:09:23,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:09:23,448 INFO L208 MainTranslator]: Completed translation [2023-02-14 13:09:23,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:09:23 WrapperNode [2023-02-14 13:09:23,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 13:09:23,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 13:09:23,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 13:09:23,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 13:09:23,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:09:23" (1/1) ... [2023-02-14 13:09:23,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:09:23" (1/1) ... [2023-02-14 13:09:23,481 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 38 [2023-02-14 13:09:23,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 13:09:23,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 13:09:23,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 13:09:23,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 13:09:23,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:09:23" (1/1) ... [2023-02-14 13:09:23,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:09:23" (1/1) ... [2023-02-14 13:09:23,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:09:23" (1/1) ... [2023-02-14 13:09:23,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:09:23" (1/1) ... [2023-02-14 13:09:23,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:09:23" (1/1) ... [2023-02-14 13:09:23,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:09:23" (1/1) ... [2023-02-14 13:09:23,512 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:09:23" (1/1) ... [2023-02-14 13:09:23,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:09:23" (1/1) ... [2023-02-14 13:09:23,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 13:09:23,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 13:09:23,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 13:09:23,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 13:09:23,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:09:23" (1/1) ... [2023-02-14 13:09:23,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:09:23,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:09:23,551 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) [2023-02-14 13:09:23,570 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 [2023-02-14 13:09:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 13:09:23,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 13:09:23,591 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-02-14 13:09:23,591 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-02-14 13:09:23,591 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2023-02-14 13:09:23,591 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2023-02-14 13:09:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 13:09:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-02-14 13:09:23,592 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-02-14 13:09:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 13:09:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 13:09:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 13:09:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 13:09:23,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 13:09:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 13:09:23,689 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 13:09:23,691 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 13:09:23,861 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 13:09:23,865 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 13:09:23,865 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-14 13:09:23,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:09:23 BoogieIcfgContainer [2023-02-14 13:09:23,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 13:09:23,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 13:09:23,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 13:09:23,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 13:09:23,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:09:23" (1/3) ... [2023-02-14 13:09:23,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6a7a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:09:23, skipping insertion in model container [2023-02-14 13:09:23,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:09:23" (2/3) ... [2023-02-14 13:09:23,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6a7a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:09:23, skipping insertion in model container [2023-02-14 13:09:23,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:09:23" (3/3) ... [2023-02-14 13:09:23,871 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max.c [2023-02-14 13:09:23,882 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 13:09:23,882 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 13:09:23,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 13:09:23,927 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@34218e8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 13:09:23,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 13:09:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 13:09:23,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 13:09:23,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:09:23,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:09:23,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:09:23,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:09:23,951 INFO L85 PathProgramCache]: Analyzing trace with hash 998783614, now seen corresponding path program 1 times [2023-02-14 13:09:23,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:09:23,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855316819] [2023-02-14 13:09:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:09:23,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:09:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:24,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:09:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:24,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 13:09:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:09:24,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:09:24,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855316819] [2023-02-14 13:09:24,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855316819] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:09:24,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:09:24,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-14 13:09:24,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844783859] [2023-02-14 13:09:24,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:09:24,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 13:09:24,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:09:24,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 13:09:24,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-14 13:09:24,331 INFO L87 Difference]: Start difference. First operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:09:24,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:09:24,693 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2023-02-14 13:09:24,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 13:09:24,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-14 13:09:24,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:09:24,701 INFO L225 Difference]: With dead ends: 74 [2023-02-14 13:09:24,701 INFO L226 Difference]: Without dead ends: 35 [2023-02-14 13:09:24,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-14 13:09:24,706 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:09:24,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 100 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:09:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-14 13:09:24,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-14 13:09:24,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-14 13:09:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2023-02-14 13:09:24,754 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2023-02-14 13:09:24,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:09:24,755 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2023-02-14 13:09:24,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:09:24,756 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2023-02-14 13:09:24,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 13:09:24,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:09:24,759 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:09:24,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 13:09:24,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:09:24,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:09:24,761 INFO L85 PathProgramCache]: Analyzing trace with hash -976273983, now seen corresponding path program 1 times [2023-02-14 13:09:24,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:09:24,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647588933] [2023-02-14 13:09:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:09:24,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:09:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:24,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:09:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:24,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:09:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:24,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:09:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:24,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:09:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 13:09:24,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:09:24,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647588933] [2023-02-14 13:09:24,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647588933] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:09:24,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:09:24,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 13:09:24,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76931332] [2023-02-14 13:09:24,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:09:24,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 13:09:24,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:09:24,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 13:09:24,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-14 13:09:24,986 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 13:09:25,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:09:25,133 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2023-02-14 13:09:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:09:25,133 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-02-14 13:09:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:09:25,135 INFO L225 Difference]: With dead ends: 48 [2023-02-14 13:09:25,135 INFO L226 Difference]: Without dead ends: 37 [2023-02-14 13:09:25,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-14 13:09:25,136 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:09:25,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 92 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:09:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-14 13:09:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-14 13:09:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-14 13:09:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-02-14 13:09:25,143 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2023-02-14 13:09:25,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:09:25,144 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-02-14 13:09:25,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 13:09:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-02-14 13:09:25,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 13:09:25,145 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:09:25,145 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:09:25,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 13:09:25,146 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:09:25,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:09:25,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1376325807, now seen corresponding path program 1 times [2023-02-14 13:09:25,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:09:25,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561843664] [2023-02-14 13:09:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:09:25,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:09:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:25,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:09:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:25,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:09:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:25,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:09:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:25,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:09:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:25,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:09:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:25,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:09:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 13:09:25,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:09:25,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561843664] [2023-02-14 13:09:25,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561843664] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:09:25,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228955906] [2023-02-14 13:09:25,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:09:25,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:09:25,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:09:25,717 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) [2023-02-14 13:09:25,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 13:09:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:25,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 13:09:25,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:09:26,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 13:09:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 13:09:26,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:09:26,213 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-02-14 13:09:26,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-02-14 13:09:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 13:09:26,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228955906] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:09:26,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:09:26,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 22 [2023-02-14 13:09:26,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765276542] [2023-02-14 13:09:26,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:09:26,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 13:09:26,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:09:26,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 13:09:26,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2023-02-14 13:09:26,248 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-14 13:09:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:09:26,619 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-02-14 13:09:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 13:09:26,620 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2023-02-14 13:09:26,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:09:26,621 INFO L225 Difference]: With dead ends: 46 [2023-02-14 13:09:26,621 INFO L226 Difference]: Without dead ends: 44 [2023-02-14 13:09:26,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 13:09:26,622 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 72 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:09:26,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 153 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:09:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-14 13:09:26,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2023-02-14 13:09:26,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-14 13:09:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2023-02-14 13:09:26,628 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 41 [2023-02-14 13:09:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:09:26,629 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2023-02-14 13:09:26,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-14 13:09:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2023-02-14 13:09:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 13:09:26,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:09:26,630 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:09:26,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 13:09:26,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:09:26,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:09:26,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:09:26,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2126921006, now seen corresponding path program 1 times [2023-02-14 13:09:26,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:09:26,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702384055] [2023-02-14 13:09:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:09:26,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:09:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:27,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:09:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:27,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:09:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:27,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:09:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:27,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:09:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:27,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:09:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:27,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:09:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:09:27,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:09:27,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702384055] [2023-02-14 13:09:27,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702384055] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:09:27,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542720371] [2023-02-14 13:09:27,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:09:27,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:09:27,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:09:27,356 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) [2023-02-14 13:09:27,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 13:09:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:27,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-14 13:09:27,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:09:27,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:09:27,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:09:27,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 13:09:27,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 13:09:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:09:27,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:09:35,987 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:09:42,074 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:09:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 13:09:42,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542720371] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:09:42,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:09:42,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 13] total 29 [2023-02-14 13:09:42,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692786266] [2023-02-14 13:09:42,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:09:42,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 13:09:42,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:09:42,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 13:09:42,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=732, Unknown=1, NotChecked=0, Total=812 [2023-02-14 13:09:42,144 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-02-14 13:09:43,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:09:43,063 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2023-02-14 13:09:43,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 13:09:43,064 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 47 [2023-02-14 13:09:43,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:09:43,065 INFO L225 Difference]: With dead ends: 72 [2023-02-14 13:09:43,065 INFO L226 Difference]: Without dead ends: 60 [2023-02-14 13:09:43,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=255, Invalid=2000, Unknown=1, NotChecked=0, Total=2256 [2023-02-14 13:09:43,067 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 134 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 13:09:43,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 287 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 13:09:43,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-14 13:09:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2023-02-14 13:09:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.225) internal successors, (49), 43 states have internal predecessors, (49), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2023-02-14 13:09:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 80 transitions. [2023-02-14 13:09:43,080 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 80 transitions. Word has length 47 [2023-02-14 13:09:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:09:43,081 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 80 transitions. [2023-02-14 13:09:43,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-02-14 13:09:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 80 transitions. [2023-02-14 13:09:43,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 13:09:43,085 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:09:43,086 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:09:43,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 13:09:43,286 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,SelfDestructingSolverStorable3 [2023-02-14 13:09:43,287 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:09:43,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:09:43,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2051682644, now seen corresponding path program 1 times [2023-02-14 13:09:43,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:09:43,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574939775] [2023-02-14 13:09:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:09:43,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:09:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:43,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:09:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:43,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:09:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:43,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:09:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:43,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:09:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:43,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:09:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:43,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:09:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 13:09:43,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:09:43,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574939775] [2023-02-14 13:09:43,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574939775] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:09:43,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177187761] [2023-02-14 13:09:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:09:43,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:09:43,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:09:43,746 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) [2023-02-14 13:09:43,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 13:09:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:43,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-14 13:09:43,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:09:43,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:09:43,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:09:44,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 13:09:44,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 13:09:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:09:44,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:09:52,248 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:09:58,309 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:09:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 13:09:58,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177187761] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:09:58,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:09:58,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 13] total 28 [2023-02-14 13:09:58,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776692079] [2023-02-14 13:09:58,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:09:58,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 13:09:58,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:09:58,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 13:09:58,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=686, Unknown=1, NotChecked=0, Total=756 [2023-02-14 13:09:58,402 INFO L87 Difference]: Start difference. First operand 59 states and 80 transitions. Second operand has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2023-02-14 13:09:59,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:09:59,173 INFO L93 Difference]: Finished difference Result 147 states and 211 transitions. [2023-02-14 13:09:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 13:09:59,174 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) Word has length 47 [2023-02-14 13:09:59,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:09:59,176 INFO L225 Difference]: With dead ends: 147 [2023-02-14 13:09:59,176 INFO L226 Difference]: Without dead ends: 91 [2023-02-14 13:09:59,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=212, Invalid=1949, Unknown=1, NotChecked=0, Total=2162 [2023-02-14 13:09:59,177 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 106 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:09:59,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 208 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 13:09:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-14 13:09:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2023-02-14 13:09:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 63 states have internal predecessors, (75), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (37), 15 states have call predecessors, (37), 11 states have call successors, (37) [2023-02-14 13:09:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 128 transitions. [2023-02-14 13:09:59,189 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 128 transitions. Word has length 47 [2023-02-14 13:09:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:09:59,189 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 128 transitions. [2023-02-14 13:09:59,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2023-02-14 13:09:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 128 transitions. [2023-02-14 13:09:59,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-14 13:09:59,191 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:09:59,191 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:09:59,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-14 13:09:59,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:09:59,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:09:59,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:09:59,396 INFO L85 PathProgramCache]: Analyzing trace with hash -945278837, now seen corresponding path program 2 times [2023-02-14 13:09:59,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:09:59,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103147509] [2023-02-14 13:09:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:09:59,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:09:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:09:59,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:09:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:00,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:00,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:00,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:00,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:00,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 13:10:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:00,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:00,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:00,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:00,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-14 13:10:00,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:10:00,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103147509] [2023-02-14 13:10:00,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103147509] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:00,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887686993] [2023-02-14 13:10:00,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:10:00,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:00,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:10:00,493 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) [2023-02-14 13:10:00,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 13:10:00,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:10:00,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:10:00,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-14 13:10:00,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:10:00,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:10:00,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:10:01,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-14 13:10:01,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-14 13:10:01,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-14 13:10:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 13:10:01,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:10:01,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:10:01,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 34 [2023-02-14 13:10:02,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887686993] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:02,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:10:02,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 47 [2023-02-14 13:10:02,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536594675] [2023-02-14 13:10:02,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:10:02,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-14 13:10:02,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:10:02,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-14 13:10:02,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3142, Unknown=0, NotChecked=0, Total=3306 [2023-02-14 13:10:02,176 INFO L87 Difference]: Start difference. First operand 88 states and 128 transitions. Second operand has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-14 13:10:04,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:10:04,582 INFO L93 Difference]: Finished difference Result 164 states and 307 transitions. [2023-02-14 13:10:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-14 13:10:04,583 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 70 [2023-02-14 13:10:04,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:10:04,585 INFO L225 Difference]: With dead ends: 164 [2023-02-14 13:10:04,585 INFO L226 Difference]: Without dead ends: 162 [2023-02-14 13:10:04,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=546, Invalid=7110, Unknown=0, NotChecked=0, Total=7656 [2023-02-14 13:10:04,588 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 164 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 2077 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:10:04,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 333 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2077 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 13:10:04,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-14 13:10:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 135. [2023-02-14 13:10:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 96 states have (on average 1.21875) internal successors, (117), 99 states have internal predecessors, (117), 21 states have call successors, (21), 11 states have call predecessors, (21), 17 states have return successors, (99), 24 states have call predecessors, (99), 13 states have call successors, (99) [2023-02-14 13:10:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 237 transitions. [2023-02-14 13:10:04,634 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 237 transitions. Word has length 70 [2023-02-14 13:10:04,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:10:04,636 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 237 transitions. [2023-02-14 13:10:04,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-14 13:10:04,637 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 237 transitions. [2023-02-14 13:10:04,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-14 13:10:04,640 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:10:04,641 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:10:04,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 13:10:04,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:04,845 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:10:04,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:10:04,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1209697001, now seen corresponding path program 2 times [2023-02-14 13:10:04,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:10:04,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695767366] [2023-02-14 13:10:04,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:04,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:10:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:05,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:05,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:05,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:05,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:05,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:05,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 13:10:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:05,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:05,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:05,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:05,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 13:10:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 13:10:05,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:10:05,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695767366] [2023-02-14 13:10:05,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695767366] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:05,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129889099] [2023-02-14 13:10:05,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:10:05,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:05,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:10:05,324 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) [2023-02-14 13:10:05,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 13:10:05,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:10:05,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:10:05,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-14 13:10:05,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:10:05,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:10:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 13:10:05,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:10:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 13:10:06,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129889099] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:10:06,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:10:06,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 30 [2023-02-14 13:10:06,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900425038] [2023-02-14 13:10:06,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:10:06,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 13:10:06,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:10:06,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 13:10:06,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2023-02-14 13:10:06,024 INFO L87 Difference]: Start difference. First operand 135 states and 237 transitions. Second operand has 30 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2023-02-14 13:10:08,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:10:10,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:10:13,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:10:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:10:13,584 INFO L93 Difference]: Finished difference Result 232 states and 410 transitions. [2023-02-14 13:10:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 13:10:13,585 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) Word has length 70 [2023-02-14 13:10:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:10:13,587 INFO L225 Difference]: With dead ends: 232 [2023-02-14 13:10:13,587 INFO L226 Difference]: Without dead ends: 216 [2023-02-14 13:10:13,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 13:10:13,588 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 133 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 88 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:10:13,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 334 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1125 Invalid, 4 Unknown, 0 Unchecked, 7.1s Time] [2023-02-14 13:10:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-02-14 13:10:13,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 150. [2023-02-14 13:10:13,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 110 states have internal predecessors, (131), 24 states have call successors, (24), 13 states have call predecessors, (24), 19 states have return successors, (87), 26 states have call predecessors, (87), 16 states have call successors, (87) [2023-02-14 13:10:13,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 242 transitions. [2023-02-14 13:10:13,608 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 242 transitions. Word has length 70 [2023-02-14 13:10:13,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:10:13,608 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 242 transitions. [2023-02-14 13:10:13,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2023-02-14 13:10:13,609 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 242 transitions. [2023-02-14 13:10:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-14 13:10:13,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:10:13,610 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:10:13,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 13:10:13,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:13,815 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:10:13,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:10:13,816 INFO L85 PathProgramCache]: Analyzing trace with hash -666655302, now seen corresponding path program 3 times [2023-02-14 13:10:13,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:10:13,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911499669] [2023-02-14 13:10:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:13,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:10:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:14,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:14,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:14,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:14,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:10:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:14,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:14,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:14,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:14,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 13:10:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-14 13:10:14,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:10:14,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911499669] [2023-02-14 13:10:14,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911499669] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:14,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220603162] [2023-02-14 13:10:14,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:10:14,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:14,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:10:14,299 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) [2023-02-14 13:10:14,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 13:10:14,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 13:10:14,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:10:14,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-14 13:10:14,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:10:14,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:10:14,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:10:14,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 13:10:14,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 13:10:14,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 13:10:14,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 13:10:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-14 13:10:14,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:10:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-14 13:10:15,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220603162] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:10:15,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:10:15,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 25 [2023-02-14 13:10:15,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104692906] [2023-02-14 13:10:15,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:10:15,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 13:10:15,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:10:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 13:10:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2023-02-14 13:10:15,037 INFO L87 Difference]: Start difference. First operand 150 states and 242 transitions. Second operand has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2023-02-14 13:10:15,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:10:15,694 INFO L93 Difference]: Finished difference Result 311 states and 504 transitions. [2023-02-14 13:10:15,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 13:10:15,695 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) Word has length 60 [2023-02-14 13:10:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:10:15,697 INFO L225 Difference]: With dead ends: 311 [2023-02-14 13:10:15,697 INFO L226 Difference]: Without dead ends: 259 [2023-02-14 13:10:15,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2023-02-14 13:10:15,698 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:10:15,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 219 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 13:10:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-14 13:10:15,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 159. [2023-02-14 13:10:15,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 116 states have internal predecessors, (137), 26 states have call successors, (26), 14 states have call predecessors, (26), 21 states have return successors, (97), 28 states have call predecessors, (97), 18 states have call successors, (97) [2023-02-14 13:10:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 260 transitions. [2023-02-14 13:10:15,713 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 260 transitions. Word has length 60 [2023-02-14 13:10:15,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:10:15,713 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 260 transitions. [2023-02-14 13:10:15,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2023-02-14 13:10:15,714 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 260 transitions. [2023-02-14 13:10:15,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 13:10:15,715 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:10:15,715 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:10:15,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-14 13:10:15,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:15,922 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:10:15,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:10:15,922 INFO L85 PathProgramCache]: Analyzing trace with hash -909256420, now seen corresponding path program 1 times [2023-02-14 13:10:15,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:10:15,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827205759] [2023-02-14 13:10:15,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:15,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:10:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:16,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:16,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:16,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:16,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:16,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:16,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 13:10:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:16,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:16,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:16,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:16,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-14 13:10:16,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:10:16,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827205759] [2023-02-14 13:10:16,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827205759] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:16,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420577442] [2023-02-14 13:10:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:16,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:16,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:10:16,945 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) [2023-02-14 13:10:16,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 13:10:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:17,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-14 13:10:17,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:10:17,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-14 13:10:17,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-14 13:10:17,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-14 13:10:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 13:10:17,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:10:18,106 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-14 13:10:18,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2023-02-14 13:10:18,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420577442] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:18,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:10:18,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22] total 45 [2023-02-14 13:10:18,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237773108] [2023-02-14 13:10:18,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:10:18,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-14 13:10:18,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:10:18,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-14 13:10:18,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2719, Unknown=0, NotChecked=0, Total=2862 [2023-02-14 13:10:18,248 INFO L87 Difference]: Start difference. First operand 159 states and 260 transitions. Second operand has 45 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 32 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-14 13:10:22,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:10:22,299 INFO L93 Difference]: Finished difference Result 324 states and 630 transitions. [2023-02-14 13:10:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-14 13:10:22,300 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 32 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 71 [2023-02-14 13:10:22,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:10:22,302 INFO L225 Difference]: With dead ends: 324 [2023-02-14 13:10:22,302 INFO L226 Difference]: Without dead ends: 322 [2023-02-14 13:10:22,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=891, Invalid=11099, Unknown=0, NotChecked=0, Total=11990 [2023-02-14 13:10:22,305 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 198 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 2919 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 3061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:10:22,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 368 Invalid, 3061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2919 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-14 13:10:22,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-02-14 13:10:22,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 175. [2023-02-14 13:10:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 122 states have (on average 1.2459016393442623) internal successors, (152), 130 states have internal predecessors, (152), 26 states have call successors, (26), 14 states have call predecessors, (26), 26 states have return successors, (126), 30 states have call predecessors, (126), 18 states have call successors, (126) [2023-02-14 13:10:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 304 transitions. [2023-02-14 13:10:22,325 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 304 transitions. Word has length 71 [2023-02-14 13:10:22,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:10:22,325 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 304 transitions. [2023-02-14 13:10:22,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 32 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-14 13:10:22,325 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 304 transitions. [2023-02-14 13:10:22,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 13:10:22,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:10:22,327 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:10:22,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 13:10:22,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:22,532 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:10:22,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:10:22,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1931785932, now seen corresponding path program 2 times [2023-02-14 13:10:22,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:10:22,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26043103] [2023-02-14 13:10:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:22,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:10:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:22,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:22,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:22,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:22,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:22,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:22,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 13:10:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:22,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:22,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:22,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:22,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 13:10:22,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:10:22,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26043103] [2023-02-14 13:10:22,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26043103] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:22,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92533167] [2023-02-14 13:10:22,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:10:22,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:22,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:10:22,762 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) [2023-02-14 13:10:22,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 13:10:22,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:10:22,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:10:22,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 13:10:22,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:10:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 13:10:22,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:10:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 13:10:23,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92533167] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:10:23,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:10:23,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 21 [2023-02-14 13:10:23,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720759255] [2023-02-14 13:10:23,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:10:23,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 13:10:23,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:10:23,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 13:10:23,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2023-02-14 13:10:23,292 INFO L87 Difference]: Start difference. First operand 175 states and 304 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-14 13:10:24,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:10:24,026 INFO L93 Difference]: Finished difference Result 377 states and 809 transitions. [2023-02-14 13:10:24,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-14 13:10:24,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 71 [2023-02-14 13:10:24,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:10:24,029 INFO L225 Difference]: With dead ends: 377 [2023-02-14 13:10:24,029 INFO L226 Difference]: Without dead ends: 243 [2023-02-14 13:10:24,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 152 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 13:10:24,031 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 113 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:10:24,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 200 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:10:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-02-14 13:10:24,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 202. [2023-02-14 13:10:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 143 states have (on average 1.1958041958041958) internal successors, (171), 148 states have internal predecessors, (171), 28 states have call successors, (28), 14 states have call predecessors, (28), 30 states have return successors, (156), 39 states have call predecessors, (156), 20 states have call successors, (156) [2023-02-14 13:10:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 355 transitions. [2023-02-14 13:10:24,048 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 355 transitions. Word has length 71 [2023-02-14 13:10:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:10:24,049 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 355 transitions. [2023-02-14 13:10:24,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-14 13:10:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 355 transitions. [2023-02-14 13:10:24,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-14 13:10:24,050 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:10:24,050 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:10:24,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-14 13:10:24,255 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,SelfDestructingSolverStorable9 [2023-02-14 13:10:24,255 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:10:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:10:24,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1914561797, now seen corresponding path program 1 times [2023-02-14 13:10:24,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:10:24,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010952166] [2023-02-14 13:10:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:24,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:10:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:24,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:24,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:24,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:24,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:24,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:24,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 13:10:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:25,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:25,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:25,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:25,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-14 13:10:25,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:10:25,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010952166] [2023-02-14 13:10:25,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010952166] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:25,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817148220] [2023-02-14 13:10:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:25,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:25,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:10:25,322 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) [2023-02-14 13:10:25,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 13:10:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:25,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-14 13:10:25,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:10:26,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-14 13:10:26,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-14 13:10:26,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-14 13:10:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 13:10:26,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:10:27,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:10:27,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2023-02-14 13:10:27,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817148220] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:27,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:10:27,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 54 [2023-02-14 13:10:27,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232733620] [2023-02-14 13:10:27,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:10:27,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-14 13:10:27,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:10:27,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-14 13:10:27,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=4625, Unknown=0, NotChecked=0, Total=4830 [2023-02-14 13:10:27,636 INFO L87 Difference]: Start difference. First operand 202 states and 355 transitions. Second operand has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-14 13:10:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:10:30,590 INFO L93 Difference]: Finished difference Result 254 states and 446 transitions. [2023-02-14 13:10:30,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-14 13:10:30,590 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 72 [2023-02-14 13:10:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:10:30,593 INFO L225 Difference]: With dead ends: 254 [2023-02-14 13:10:30,593 INFO L226 Difference]: Without dead ends: 252 [2023-02-14 13:10:30,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=739, Invalid=10181, Unknown=0, NotChecked=0, Total=10920 [2023-02-14 13:10:30,595 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 180 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 13:10:30,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 358 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2320 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 13:10:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-02-14 13:10:30,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2023-02-14 13:10:30,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 144 states have internal predecessors, (166), 28 states have call successors, (28), 14 states have call predecessors, (28), 29 states have return successors, (150), 38 states have call predecessors, (150), 20 states have call successors, (150) [2023-02-14 13:10:30,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 344 transitions. [2023-02-14 13:10:30,613 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 344 transitions. Word has length 72 [2023-02-14 13:10:30,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:10:30,613 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 344 transitions. [2023-02-14 13:10:30,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-14 13:10:30,613 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 344 transitions. [2023-02-14 13:10:30,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-14 13:10:30,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:10:30,615 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:10:30,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-14 13:10:30,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:30,835 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:10:30,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:10:30,836 INFO L85 PathProgramCache]: Analyzing trace with hash 872853690, now seen corresponding path program 1 times [2023-02-14 13:10:30,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:10:30,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939163342] [2023-02-14 13:10:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:30,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:10:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:31,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:31,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:31,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:31,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:31,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:31,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 13:10:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:31,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:31,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:31,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:31,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 13:10:31,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:10:31,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939163342] [2023-02-14 13:10:31,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939163342] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:31,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962479539] [2023-02-14 13:10:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:31,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:31,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:10:31,905 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) [2023-02-14 13:10:31,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 13:10:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:32,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-14 13:10:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:10:32,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:10:32,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:10:32,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-02-14 13:10:32,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-02-14 13:10:32,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 13:10:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 13:10:32,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:10:32,997 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-14 13:10:32,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2023-02-14 13:10:33,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962479539] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:33,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:10:33,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 43 [2023-02-14 13:10:33,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439166283] [2023-02-14 13:10:33,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:10:33,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-14 13:10:33,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:10:33,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-14 13:10:33,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 13:10:33,129 INFO L87 Difference]: Start difference. First operand 197 states and 344 transitions. Second operand has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2023-02-14 13:10:34,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:10:34,397 INFO L93 Difference]: Finished difference Result 242 states and 408 transitions. [2023-02-14 13:10:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-14 13:10:34,407 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) Word has length 72 [2023-02-14 13:10:34,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:10:34,409 INFO L225 Difference]: With dead ends: 242 [2023-02-14 13:10:34,409 INFO L226 Difference]: Without dead ends: 240 [2023-02-14 13:10:34,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=361, Invalid=4469, Unknown=0, NotChecked=0, Total=4830 [2023-02-14 13:10:34,411 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 92 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 13:10:34,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 298 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 13:10:34,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-02-14 13:10:34,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 184. [2023-02-14 13:10:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 130 states have (on average 1.2076923076923076) internal successors, (157), 133 states have internal predecessors, (157), 27 states have call successors, (27), 13 states have call predecessors, (27), 26 states have return successors, (132), 37 states have call predecessors, (132), 20 states have call successors, (132) [2023-02-14 13:10:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 316 transitions. [2023-02-14 13:10:34,442 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 316 transitions. Word has length 72 [2023-02-14 13:10:34,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:10:34,442 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 316 transitions. [2023-02-14 13:10:34,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2023-02-14 13:10:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 316 transitions. [2023-02-14 13:10:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-14 13:10:34,444 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:10:34,444 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:10:34,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 13:10:34,649 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,SelfDestructingSolverStorable11 [2023-02-14 13:10:34,649 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:10:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:10:34,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1479239555, now seen corresponding path program 4 times [2023-02-14 13:10:34,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:10:34,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435520672] [2023-02-14 13:10:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:34,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:10:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:35,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:35,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:35,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:35,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:35,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 13:10:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:35,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 13:10:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:35,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:35,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:35,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:35,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 13:10:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-14 13:10:35,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:10:35,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435520672] [2023-02-14 13:10:35,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435520672] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:35,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41578370] [2023-02-14 13:10:35,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 13:10:35,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:35,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:10:35,289 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) [2023-02-14 13:10:35,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 13:10:35,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 13:10:35,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:10:35,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-14 13:10:35,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:10:35,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-02-14 13:10:35,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-02-14 13:10:35,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-14 13:10:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 13:10:35,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:10:35,946 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-14 13:10:35,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2023-02-14 13:10:36,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41578370] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:36,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:10:36,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 30 [2023-02-14 13:10:36,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940051245] [2023-02-14 13:10:36,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:10:36,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 13:10:36,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:10:36,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 13:10:36,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 13:10:36,053 INFO L87 Difference]: Start difference. First operand 184 states and 316 transitions. Second operand has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2023-02-14 13:10:36,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:10:36,997 INFO L93 Difference]: Finished difference Result 230 states and 391 transitions. [2023-02-14 13:10:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 13:10:36,997 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) Word has length 70 [2023-02-14 13:10:36,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:10:36,999 INFO L225 Difference]: With dead ends: 230 [2023-02-14 13:10:36,999 INFO L226 Difference]: Without dead ends: 228 [2023-02-14 13:10:36,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=284, Invalid=2908, Unknown=0, NotChecked=0, Total=3192 [2023-02-14 13:10:37,000 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:10:37,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 228 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 13:10:37,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-14 13:10:37,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 199. [2023-02-14 13:10:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 142 states have (on average 1.1971830985915493) internal successors, (170), 144 states have internal predecessors, (170), 30 states have call successors, (30), 15 states have call predecessors, (30), 26 states have return successors, (132), 39 states have call predecessors, (132), 20 states have call successors, (132) [2023-02-14 13:10:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 332 transitions. [2023-02-14 13:10:37,017 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 332 transitions. Word has length 70 [2023-02-14 13:10:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:10:37,017 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 332 transitions. [2023-02-14 13:10:37,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2023-02-14 13:10:37,017 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 332 transitions. [2023-02-14 13:10:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 13:10:37,019 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:10:37,019 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:10:37,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 13:10:37,224 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,SelfDestructingSolverStorable12 [2023-02-14 13:10:37,224 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:10:37,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:10:37,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1086227410, now seen corresponding path program 1 times [2023-02-14 13:10:37,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:10:37,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181588796] [2023-02-14 13:10:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:37,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:10:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:37,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:37,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:37,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:37,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:37,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 13:10:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:37,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 13:10:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:37,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:38,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:38,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:38,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 13:10:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-14 13:10:38,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:10:38,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181588796] [2023-02-14 13:10:38,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181588796] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:38,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826518843] [2023-02-14 13:10:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:38,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:38,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:10:38,034 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) [2023-02-14 13:10:38,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 13:10:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:38,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-14 13:10:38,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:10:38,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:10:38,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:10:38,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-14 13:10:38,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-14 13:10:38,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-14 13:10:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 13:10:38,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:10:39,198 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-14 13:10:39,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2023-02-14 13:10:39,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826518843] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:39,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:10:39,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23] total 43 [2023-02-14 13:10:39,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638547610] [2023-02-14 13:10:39,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:10:39,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-14 13:10:39,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:10:39,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-14 13:10:39,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2512, Unknown=0, NotChecked=0, Total=2652 [2023-02-14 13:10:39,346 INFO L87 Difference]: Start difference. First operand 199 states and 332 transitions. Second operand has 43 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 32 states have internal predecessors, (66), 15 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-14 13:10:45,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:10:45,388 INFO L93 Difference]: Finished difference Result 603 states and 1298 transitions. [2023-02-14 13:10:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-02-14 13:10:45,388 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 32 states have internal predecessors, (66), 15 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) Word has length 71 [2023-02-14 13:10:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:10:45,392 INFO L225 Difference]: With dead ends: 603 [2023-02-14 13:10:45,393 INFO L226 Difference]: Without dead ends: 601 [2023-02-14 13:10:45,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4523 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1394, Invalid=17238, Unknown=0, NotChecked=0, Total=18632 [2023-02-14 13:10:45,394 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 308 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 3718 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 4016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 3718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-14 13:10:45,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 381 Invalid, 4016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 3718 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-14 13:10:45,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2023-02-14 13:10:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 338. [2023-02-14 13:10:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 241 states have (on average 1.2116182572614107) internal successors, (292), 249 states have internal predecessors, (292), 44 states have call successors, (44), 19 states have call predecessors, (44), 52 states have return successors, (393), 69 states have call predecessors, (393), 33 states have call successors, (393) [2023-02-14 13:10:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 729 transitions. [2023-02-14 13:10:45,435 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 729 transitions. Word has length 71 [2023-02-14 13:10:45,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:10:45,436 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 729 transitions. [2023-02-14 13:10:45,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 32 states have internal predecessors, (66), 15 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-14 13:10:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 729 transitions. [2023-02-14 13:10:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 13:10:45,439 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:10:45,439 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:10:45,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 13:10:45,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 13:10:45,657 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:10:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:10:45,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1479346186, now seen corresponding path program 1 times [2023-02-14 13:10:45,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:10:45,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299343635] [2023-02-14 13:10:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:45,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:10:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:46,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:46,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:46,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:46,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:46,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:46,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 13:10:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:46,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:46,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:46,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:46,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-14 13:10:46,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:10:46,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299343635] [2023-02-14 13:10:46,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299343635] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:46,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221342171] [2023-02-14 13:10:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:46,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:46,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:10:46,558 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) [2023-02-14 13:10:46,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 13:10:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:46,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 116 conjunts are in the unsatisfiable core [2023-02-14 13:10:46,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:10:46,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:10:46,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:10:46,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:10:46,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 13:10:46,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 13:10:46,938 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:10:46,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-14 13:10:46,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 13:10:46,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-14 13:10:47,596 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:10:47,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:10:47,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:10:47,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2023-02-14 13:10:47,607 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 13:10:47,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2023-02-14 13:10:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 13:10:47,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:10:50,213 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 4 |c_nondet_tree_#res.offset|))) (and (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (= (select (select (store |c_#memory_$Pointer$.base| 0 (store (select |c_#memory_$Pointer$.base| 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse0) 0)) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| 0 (store (select |c_#memory_$Pointer$.offset| 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse0) 0)) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (or (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 4) 0) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int)) (= (select (select (store |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse0) 0)))) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int)) (or (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse0) 0)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_11) 0))) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int)) (or (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (= (select (select (store |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse0) 0)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_11) 0))) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (or (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse0) 0)) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 4) 0))))) is different from false [2023-02-14 13:10:52,279 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base)) (.cse1 (select |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base)) (.cse2 (+ 8 c_nondet_tree_~n~0.offset)) (.cse3 (+ 4 c_nondet_tree_~n~0.offset))) (and (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int) (v_ArrVal_1594 Int)) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store .cse1 .cse2 v_ArrVal_1594)))) (store .cse0 0 (store (select .cse0 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) .cse3) 0)) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int) (v_ArrVal_1595 Int)) (or (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store .cse5 .cse2 v_ArrVal_1595)))) (store .cse4 v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select .cse4 v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) .cse3) 0)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_11) 0))) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int) (v_ArrVal_1594 Int)) (or (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int)) (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store .cse1 .cse2 v_ArrVal_1594)))) (store .cse6 v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select .cse6 v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) .cse3) 0)) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 4) 0))) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int) (v_ArrVal_1595 Int)) (= (select (select (let ((.cse7 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store .cse5 .cse2 v_ArrVal_1595)))) (store .cse7 0 (store (select .cse7 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) .cse3) 0)) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int) (v_ArrVal_1595 Int)) (or (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int)) (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store .cse5 .cse2 v_ArrVal_1595)))) (store .cse8 v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select .cse8 v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) .cse3) 0)) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 4) 0))) (forall ((v_ArrVal_1594 Int) (v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int)) (or (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store .cse1 .cse2 v_ArrVal_1594)))) (store .cse9 v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select .cse9 v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) .cse3) 0)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_11) 0))))) is different from false [2023-02-14 13:10:52,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221342171] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:52,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:10:52,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 46 [2023-02-14 13:10:52,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249323176] [2023-02-14 13:10:52,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:10:52,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-14 13:10:52,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:10:52,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-14 13:10:52,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2910, Unknown=2, NotChecked=218, Total=3306 [2023-02-14 13:10:52,322 INFO L87 Difference]: Start difference. First operand 338 states and 729 transitions. Second operand has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2023-02-14 13:10:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:10:56,602 INFO L93 Difference]: Finished difference Result 857 states and 2160 transitions. [2023-02-14 13:10:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-14 13:10:56,603 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) Word has length 76 [2023-02-14 13:10:56,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:10:56,610 INFO L225 Difference]: With dead ends: 857 [2023-02-14 13:10:56,610 INFO L226 Difference]: Without dead ends: 815 [2023-02-14 13:10:56,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3331 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=889, Invalid=11999, Unknown=2, NotChecked=450, Total=13340 [2023-02-14 13:10:56,613 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 230 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 3262 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 3446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 3262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:10:56,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 329 Invalid, 3446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 3262 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-14 13:10:56,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2023-02-14 13:10:56,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 643. [2023-02-14 13:10:56,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 467 states have (on average 1.222698072805139) internal successors, (571), 483 states have internal predecessors, (571), 69 states have call successors, (69), 30 states have call predecessors, (69), 106 states have return successors, (1009), 129 states have call predecessors, (1009), 51 states have call successors, (1009) [2023-02-14 13:10:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1649 transitions. [2023-02-14 13:10:56,720 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1649 transitions. Word has length 76 [2023-02-14 13:10:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:10:56,720 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 1649 transitions. [2023-02-14 13:10:56,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2023-02-14 13:10:56,720 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1649 transitions. [2023-02-14 13:10:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 13:10:56,724 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:10:56,724 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:10:56,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 13:10:56,945 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,SelfDestructingSolverStorable14 [2023-02-14 13:10:56,946 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:10:56,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:10:56,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1595709832, now seen corresponding path program 3 times [2023-02-14 13:10:56,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:10:56,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142063566] [2023-02-14 13:10:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:10:56,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:10:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:57,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:57,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:57,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:57,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:10:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:57,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:10:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:57,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 13:10:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:57,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:57,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:57,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:10:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:57,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:10:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:10:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-14 13:10:57,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:10:57,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142063566] [2023-02-14 13:10:57,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142063566] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:10:57,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109950045] [2023-02-14 13:10:57,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:10:57,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:10:57,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:10:57,919 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) [2023-02-14 13:10:57,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 13:10:58,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 13:10:58,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:10:58,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 113 conjunts are in the unsatisfiable core [2023-02-14 13:10:58,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:10:58,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:10:58,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:10:58,226 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-02-14 13:10:58,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-02-14 13:10:58,234 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-02-14 13:10:58,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2023-02-14 13:10:59,393 INFO L321 Elim1Store]: treesize reduction 28, result has 54.1 percent of original size [2023-02-14 13:10:59,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 103 [2023-02-14 13:10:59,422 INFO L321 Elim1Store]: treesize reduction 28, result has 54.1 percent of original size [2023-02-14 13:10:59,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 80 [2023-02-14 13:10:59,833 INFO L321 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2023-02-14 13:10:59,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 33 [2023-02-14 13:10:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-14 13:10:59,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:11:00,460 INFO L321 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2023-02-14 13:11:00,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2023-02-14 13:11:00,712 INFO L321 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2023-02-14 13:11:00,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2023-02-14 13:11:02,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:11:02,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:11:02,928 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:11:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-14 13:11:05,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109950045] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:11:05,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:11:05,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 23] total 64 [2023-02-14 13:11:05,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396653986] [2023-02-14 13:11:05,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:11:05,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-14 13:11:05,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:11:05,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-14 13:11:05,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3830, Unknown=0, NotChecked=0, Total=4032 [2023-02-14 13:11:05,667 INFO L87 Difference]: Start difference. First operand 643 states and 1649 transitions. Second operand has 64 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 43 states have internal predecessors, (102), 18 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (24), 19 states have call predecessors, (24), 10 states have call successors, (24) [2023-02-14 13:11:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:11:12,657 INFO L93 Difference]: Finished difference Result 1095 states and 2604 transitions. [2023-02-14 13:11:12,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-14 13:11:12,657 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 43 states have internal predecessors, (102), 18 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (24), 19 states have call predecessors, (24), 10 states have call successors, (24) Word has length 76 [2023-02-14 13:11:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:11:12,666 INFO L225 Difference]: With dead ends: 1095 [2023-02-14 13:11:12,666 INFO L226 Difference]: Without dead ends: 1064 [2023-02-14 13:11:12,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=920, Invalid=13600, Unknown=0, NotChecked=0, Total=14520 [2023-02-14 13:11:12,668 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 234 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 4263 mSolverCounterSat, 83 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 4352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 4263 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-14 13:11:12,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 668 Invalid, 4352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 4263 Invalid, 6 Unknown, 0 Unchecked, 2.5s Time] [2023-02-14 13:11:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2023-02-14 13:11:12,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 963. [2023-02-14 13:11:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 710 states have (on average 1.2154929577464788) internal successors, (863), 727 states have internal predecessors, (863), 104 states have call successors, (104), 54 states have call predecessors, (104), 148 states have return successors, (1311), 181 states have call predecessors, (1311), 62 states have call successors, (1311) [2023-02-14 13:11:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 2278 transitions. [2023-02-14 13:11:12,785 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 2278 transitions. Word has length 76 [2023-02-14 13:11:12,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:11:12,785 INFO L495 AbstractCegarLoop]: Abstraction has 963 states and 2278 transitions. [2023-02-14 13:11:12,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 43 states have internal predecessors, (102), 18 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (24), 19 states have call predecessors, (24), 10 states have call successors, (24) [2023-02-14 13:11:12,786 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 2278 transitions. [2023-02-14 13:11:12,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-14 13:11:12,791 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:11:12,791 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:11:12,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 13:11:12,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:11:12,997 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:11:12,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:11:12,997 INFO L85 PathProgramCache]: Analyzing trace with hash 191480931, now seen corresponding path program 1 times [2023-02-14 13:11:12,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:11:12,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957675754] [2023-02-14 13:11:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:11:12,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:11:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:13,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:13,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:11:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:13,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:11:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:13,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:11:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:13,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 13:11:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:13,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 13:11:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:13,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:13,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:13,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:11:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:13,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:11:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-14 13:11:13,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:11:13,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957675754] [2023-02-14 13:11:13,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957675754] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:11:13,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316270637] [2023-02-14 13:11:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:11:13,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:11:13,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:11:13,741 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) [2023-02-14 13:11:13,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 13:11:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:13,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-14 13:11:13,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:11:14,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-14 13:11:14,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-14 13:11:14,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-14 13:11:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 13:11:14,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:11:15,661 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-14 13:11:15,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2023-02-14 13:11:16,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316270637] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:11:16,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:11:16,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 51 [2023-02-14 13:11:16,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191940749] [2023-02-14 13:11:16,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:11:16,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-14 13:11:16,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:11:16,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-14 13:11:16,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4618, Unknown=0, NotChecked=0, Total=4830 [2023-02-14 13:11:16,144 INFO L87 Difference]: Start difference. First operand 963 states and 2278 transitions. Second operand has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-14 13:11:20,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:11:20,682 INFO L93 Difference]: Finished difference Result 1402 states and 4443 transitions. [2023-02-14 13:11:20,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-02-14 13:11:20,682 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 72 [2023-02-14 13:11:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:11:20,698 INFO L225 Difference]: With dead ends: 1402 [2023-02-14 13:11:20,698 INFO L226 Difference]: Without dead ends: 1400 [2023-02-14 13:11:20,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3440 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1095, Invalid=14405, Unknown=0, NotChecked=0, Total=15500 [2023-02-14 13:11:20,701 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 181 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 4037 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 4161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 4037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-14 13:11:20,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 441 Invalid, 4161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 4037 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-14 13:11:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2023-02-14 13:11:20,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 948. [2023-02-14 13:11:20,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 701 states have (on average 1.216833095577746) internal successors, (853), 717 states have internal predecessors, (853), 100 states have call successors, (100), 54 states have call predecessors, (100), 146 states have return successors, (1262), 176 states have call predecessors, (1262), 58 states have call successors, (1262) [2023-02-14 13:11:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2215 transitions. [2023-02-14 13:11:20,846 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2215 transitions. Word has length 72 [2023-02-14 13:11:20,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:11:20,846 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 2215 transitions. [2023-02-14 13:11:20,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-14 13:11:20,847 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2215 transitions. [2023-02-14 13:11:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-14 13:11:20,856 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:11:20,856 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:11:20,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-14 13:11:21,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-14 13:11:21,062 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:11:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:11:21,062 INFO L85 PathProgramCache]: Analyzing trace with hash -700730293, now seen corresponding path program 4 times [2023-02-14 13:11:21,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:11:21,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622582647] [2023-02-14 13:11:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:11:21,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:11:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:21,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:21,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:11:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:21,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:11:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:21,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:11:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:21,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:11:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:21,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:11:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:21,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:11:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:21,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-14 13:11:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:22,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:22,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:11:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:22,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:22,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:11:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-14 13:11:22,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:11:22,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622582647] [2023-02-14 13:11:22,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622582647] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:11:22,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116771895] [2023-02-14 13:11:22,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 13:11:22,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:11:22,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:11:22,146 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) [2023-02-14 13:11:22,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 13:11:22,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 13:11:22,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:11:22,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 99 conjunts are in the unsatisfiable core [2023-02-14 13:11:22,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:11:22,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:11:22,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:11:22,970 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:11:22,978 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-02-14 13:11:22,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2023-02-14 13:11:22,985 INFO L321 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2023-02-14 13:11:22,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2023-02-14 13:11:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-14 13:11:22,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:11:35,489 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:11:45,610 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:11:45,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116771895] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:11:45,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:11:45,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 33 [2023-02-14 13:11:45,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201004853] [2023-02-14 13:11:45,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:11:45,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 13:11:45,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:11:45,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 13:11:45,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1674, Unknown=1, NotChecked=0, Total=1806 [2023-02-14 13:11:45,612 INFO L87 Difference]: Start difference. First operand 948 states and 2215 transitions. Second operand has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 11 states have call successors, (20), 7 states have call predecessors, (20), 10 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2023-02-14 13:11:47,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:11:47,085 INFO L93 Difference]: Finished difference Result 1681 states and 4043 transitions. [2023-02-14 13:11:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 13:11:47,085 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 11 states have call successors, (20), 7 states have call predecessors, (20), 10 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) Word has length 86 [2023-02-14 13:11:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:11:47,096 INFO L225 Difference]: With dead ends: 1681 [2023-02-14 13:11:47,097 INFO L226 Difference]: Without dead ends: 1639 [2023-02-14 13:11:47,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=349, Invalid=3940, Unknown=1, NotChecked=0, Total=4290 [2023-02-14 13:11:47,098 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 145 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 13:11:47,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 270 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 13:11:47,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2023-02-14 13:11:47,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1224. [2023-02-14 13:11:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 907 states have (on average 1.2326350606394707) internal successors, (1118), 944 states have internal predecessors, (1118), 101 states have call successors, (101), 55 states have call predecessors, (101), 215 states have return successors, (1863), 224 states have call predecessors, (1863), 59 states have call successors, (1863) [2023-02-14 13:11:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 3082 transitions. [2023-02-14 13:11:47,256 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 3082 transitions. Word has length 86 [2023-02-14 13:11:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:11:47,256 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 3082 transitions. [2023-02-14 13:11:47,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 11 states have call successors, (20), 7 states have call predecessors, (20), 10 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2023-02-14 13:11:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 3082 transitions. [2023-02-14 13:11:47,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 13:11:47,264 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:11:47,265 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:11:47,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-14 13:11:47,471 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,SelfDestructingSolverStorable17 [2023-02-14 13:11:47,471 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:11:47,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:11:47,471 INFO L85 PathProgramCache]: Analyzing trace with hash 181678716, now seen corresponding path program 5 times [2023-02-14 13:11:47,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:11:47,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628066654] [2023-02-14 13:11:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:11:47,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:11:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:48,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:48,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:11:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:48,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:11:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:48,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:11:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:48,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 13:11:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:48,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 13:11:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:48,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:49,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:11:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:49,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:11:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:49,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 13:11:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:11:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 13:11:49,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:11:49,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628066654] [2023-02-14 13:11:49,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628066654] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:11:49,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757596940] [2023-02-14 13:11:49,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 13:11:49,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:11:49,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:11:49,124 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) [2023-02-14 13:11:49,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 13:11:49,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-14 13:11:49,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:11:49,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 102 conjunts are in the unsatisfiable core [2023-02-14 13:11:49,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:11:49,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:11:49,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 13:11:49,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:11:50,587 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:11:50,597 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-02-14 13:11:50,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2023-02-14 13:11:50,606 INFO L321 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2023-02-14 13:11:50,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2023-02-14 13:11:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 13:11:50,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:12:07,186 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:12:07,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757596940] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:12:07,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:12:07,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 27] total 54 [2023-02-14 13:12:07,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051496668] [2023-02-14 13:12:07,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:12:07,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-14 13:12:07,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:12:07,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-14 13:12:07,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3681, Unknown=2, NotChecked=0, Total=3906 [2023-02-14 13:12:07,214 INFO L87 Difference]: Start difference. First operand 1224 states and 3082 transitions. Second operand has 54 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 41 states have internal predecessors, (87), 20 states have call successors, (22), 10 states have call predecessors, (22), 17 states have return successors, (20), 16 states have call predecessors, (20), 16 states have call successors, (20) [2023-02-14 13:12:15,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:12:15,627 INFO L93 Difference]: Finished difference Result 2190 states and 7546 transitions. [2023-02-14 13:12:15,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-02-14 13:12:15,628 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 41 states have internal predecessors, (87), 20 states have call successors, (22), 10 states have call predecessors, (22), 17 states have return successors, (20), 16 states have call predecessors, (20), 16 states have call successors, (20) Word has length 76 [2023-02-14 13:12:15,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:12:15,650 INFO L225 Difference]: With dead ends: 2190 [2023-02-14 13:12:15,650 INFO L226 Difference]: Without dead ends: 2178 [2023-02-14 13:12:15,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4077 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=1394, Invalid=15374, Unknown=2, NotChecked=0, Total=16770 [2023-02-14 13:12:15,653 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 414 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 4905 mSolverCounterSat, 489 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 5396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 4905 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-02-14 13:12:15,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 466 Invalid, 5396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 4905 Invalid, 2 Unknown, 0 Unchecked, 2.7s Time] [2023-02-14 13:12:15,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2023-02-14 13:12:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1386. [2023-02-14 13:12:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1028 states have (on average 1.2344357976653697) internal successors, (1269), 1066 states have internal predecessors, (1269), 116 states have call successors, (116), 61 states have call predecessors, (116), 241 states have return successors, (2252), 258 states have call predecessors, (2252), 72 states have call successors, (2252) [2023-02-14 13:12:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 3637 transitions. [2023-02-14 13:12:15,935 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 3637 transitions. Word has length 76 [2023-02-14 13:12:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:12:15,935 INFO L495 AbstractCegarLoop]: Abstraction has 1386 states and 3637 transitions. [2023-02-14 13:12:15,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 41 states have internal predecessors, (87), 20 states have call successors, (22), 10 states have call predecessors, (22), 17 states have return successors, (20), 16 states have call predecessors, (20), 16 states have call successors, (20) [2023-02-14 13:12:15,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 3637 transitions. [2023-02-14 13:12:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 13:12:15,950 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:12:15,950 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:12:15,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-14 13:12:16,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:12:16,168 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:12:16,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:12:16,168 INFO L85 PathProgramCache]: Analyzing trace with hash 298042362, now seen corresponding path program 2 times [2023-02-14 13:12:16,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:12:16,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76711401] [2023-02-14 13:12:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:12:16,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:12:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:16,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:12:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:16,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:12:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:17,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:12:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:17,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:12:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:17,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 13:12:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:17,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 13:12:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:17,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:12:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:17,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:12:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:17,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:12:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:17,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 13:12:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-14 13:12:17,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:12:17,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76711401] [2023-02-14 13:12:17,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76711401] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:12:17,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971143225] [2023-02-14 13:12:17,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:12:17,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:12:17,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:12:17,201 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) [2023-02-14 13:12:17,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 13:12:17,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:12:17,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:12:17,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 102 conjunts are in the unsatisfiable core [2023-02-14 13:12:17,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:12:17,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:12:17,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 13:12:17,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:12:18,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:12:18,198 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:12:18,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:12:18,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 33 [2023-02-14 13:12:18,207 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2023-02-14 13:12:18,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2023-02-14 13:12:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 39 proven. 33 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 13:12:18,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:12:29,025 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:12:39,132 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 13:12:39,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971143225] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:12:39,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:12:39,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27] total 41 [2023-02-14 13:12:39,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576089612] [2023-02-14 13:12:39,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:12:39,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-14 13:12:39,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:12:39,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-14 13:12:39,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2381, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 13:12:39,134 INFO L87 Difference]: Start difference. First operand 1386 states and 3637 transitions. Second operand has 41 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 31 states have internal predecessors, (75), 15 states have call successors, (21), 9 states have call predecessors, (21), 13 states have return successors, (18), 14 states have call predecessors, (18), 12 states have call successors, (18) [2023-02-14 13:12:48,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:12:49,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:12:49,327 INFO L93 Difference]: Finished difference Result 3642 states and 14084 transitions. [2023-02-14 13:12:49,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-14 13:12:49,327 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 31 states have internal predecessors, (75), 15 states have call successors, (21), 9 states have call predecessors, (21), 13 states have return successors, (18), 14 states have call predecessors, (18), 12 states have call successors, (18) Word has length 76 [2023-02-14 13:12:49,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:12:49,371 INFO L225 Difference]: With dead ends: 3642 [2023-02-14 13:12:49,371 INFO L226 Difference]: Without dead ends: 3422 [2023-02-14 13:12:49,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=929, Invalid=11061, Unknown=0, NotChecked=0, Total=11990 [2023-02-14 13:12:49,374 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 222 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 182 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 2725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:12:49,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 348 Invalid, 2725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2542 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2023-02-14 13:12:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2023-02-14 13:12:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 1624. [2023-02-14 13:12:49,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1203 states have (on average 1.2352452202826267) internal successors, (1486), 1237 states have internal predecessors, (1486), 143 states have call successors, (143), 71 states have call predecessors, (143), 277 states have return successors, (2548), 315 states have call predecessors, (2548), 97 states have call successors, (2548) [2023-02-14 13:12:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 4177 transitions. [2023-02-14 13:12:49,843 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 4177 transitions. Word has length 76 [2023-02-14 13:12:49,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:12:49,843 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 4177 transitions. [2023-02-14 13:12:49,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 31 states have internal predecessors, (75), 15 states have call successors, (21), 9 states have call predecessors, (21), 13 states have return successors, (18), 14 states have call predecessors, (18), 12 states have call successors, (18) [2023-02-14 13:12:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 4177 transitions. [2023-02-14 13:12:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-14 13:12:49,854 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:12:49,854 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:12:49,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-14 13:12:50,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:12:50,060 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:12:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:12:50,060 INFO L85 PathProgramCache]: Analyzing trace with hash -560347655, now seen corresponding path program 5 times [2023-02-14 13:12:50,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:12:50,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824264964] [2023-02-14 13:12:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:12:50,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:12:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:50,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:12:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:50,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:12:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:50,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:12:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:50,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:12:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:50,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:12:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:50,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:12:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:50,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:12:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:50,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-14 13:12:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:51,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:12:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:51,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:12:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:51,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:12:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:51,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:12:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:51,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:12:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:51,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:12:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:12:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 50 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-02-14 13:12:51,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:12:51,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824264964] [2023-02-14 13:12:51,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824264964] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:12:51,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933266107] [2023-02-14 13:12:51,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 13:12:51,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:12:51,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:12:51,411 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) [2023-02-14 13:12:51,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 13:12:51,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-14 13:12:51,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:12:51,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 113 conjunts are in the unsatisfiable core [2023-02-14 13:12:51,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:12:51,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:12:51,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:12:52,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:12:52,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 55 [2023-02-14 13:12:52,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:12:52,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 42 [2023-02-14 13:12:52,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-14 13:12:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-14 13:12:52,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:12:53,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:12:53,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 70 [2023-02-14 13:12:54,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:12:54,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 56 [2023-02-14 13:12:54,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933266107] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:12:54,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:12:54,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 57 [2023-02-14 13:12:54,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928863229] [2023-02-14 13:12:54,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:12:54,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-14 13:12:54,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:12:54,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-14 13:12:54,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4768, Unknown=0, NotChecked=0, Total=4970 [2023-02-14 13:12:54,407 INFO L87 Difference]: Start difference. First operand 1624 states and 4177 transitions. Second operand has 57 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 41 states have internal predecessors, (84), 19 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (20), 17 states have call predecessors, (20), 13 states have call successors, (20) [2023-02-14 13:12:59,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:12:59,151 INFO L93 Difference]: Finished difference Result 2757 states and 8336 transitions. [2023-02-14 13:12:59,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-14 13:12:59,151 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 41 states have internal predecessors, (84), 19 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (20), 17 states have call predecessors, (20), 13 states have call successors, (20) Word has length 99 [2023-02-14 13:12:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:12:59,174 INFO L225 Difference]: With dead ends: 2757 [2023-02-14 13:12:59,174 INFO L226 Difference]: Without dead ends: 2755 [2023-02-14 13:12:59,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3188 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1108, Invalid=14642, Unknown=0, NotChecked=0, Total=15750 [2023-02-14 13:12:59,176 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 177 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 3583 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 3673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 3583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-14 13:12:59,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 445 Invalid, 3673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 3583 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-14 13:12:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2023-02-14 13:12:59,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1756. [2023-02-14 13:12:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1296 states have (on average 1.2376543209876543) internal successors, (1604), 1350 states have internal predecessors, (1604), 143 states have call successors, (143), 71 states have call predecessors, (143), 316 states have return successors, (2932), 334 states have call predecessors, (2932), 97 states have call successors, (2932) [2023-02-14 13:12:59,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 4679 transitions. [2023-02-14 13:12:59,516 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 4679 transitions. Word has length 99 [2023-02-14 13:12:59,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:12:59,516 INFO L495 AbstractCegarLoop]: Abstraction has 1756 states and 4679 transitions. [2023-02-14 13:12:59,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 41 states have internal predecessors, (84), 19 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (20), 17 states have call predecessors, (20), 13 states have call successors, (20) [2023-02-14 13:12:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 4679 transitions. [2023-02-14 13:12:59,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-14 13:12:59,537 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:12:59,537 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:12:59,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 13:12:59,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:12:59,744 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:12:59,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:12:59,744 INFO L85 PathProgramCache]: Analyzing trace with hash -285986040, now seen corresponding path program 3 times [2023-02-14 13:12:59,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:12:59,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944095070] [2023-02-14 13:12:59,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:12:59,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:12:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:00,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:13:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:00,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:13:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:01,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:13:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:01,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:13:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:01,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:13:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:01,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:13:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:01,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:13:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:01,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-14 13:13:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:01,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:13:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:01,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:13:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:01,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:13:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:01,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:13:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:01,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:13:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:01,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:13:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 47 proven. 79 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 13:13:01,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:13:01,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944095070] [2023-02-14 13:13:01,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944095070] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:13:01,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485179204] [2023-02-14 13:13:01,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:13:01,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:13:01,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:13:01,866 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) [2023-02-14 13:13:01,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 13:13:02,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-14 13:13:02,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:13:02,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 162 conjunts are in the unsatisfiable core [2023-02-14 13:13:02,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:13:02,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:13:02,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:13:02,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:13:02,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:13:02,560 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2023-02-14 13:13:02,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2023-02-14 13:13:02,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2023-02-14 13:13:02,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:13:02,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:13:04,558 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:13:04,564 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-14 13:13:04,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 54 [2023-02-14 13:13:04,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 21 [2023-02-14 13:13:04,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-02-14 13:13:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 47 proven. 90 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-14 13:13:04,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:13:06,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485179204] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:13:06,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:13:06,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38] total 74 [2023-02-14 13:13:06,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168129892] [2023-02-14 13:13:06,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:13:06,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-14 13:13:06,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:13:06,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-14 13:13:06,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=7717, Unknown=0, NotChecked=0, Total=8010 [2023-02-14 13:13:06,478 INFO L87 Difference]: Start difference. First operand 1756 states and 4679 transitions. Second operand has 74 states, 60 states have (on average 1.7666666666666666) internal successors, (106), 55 states have internal predecessors, (106), 25 states have call successors, (33), 10 states have call predecessors, (33), 17 states have return successors, (27), 25 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-14 13:13:23,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:13:23,977 INFO L93 Difference]: Finished difference Result 3651 states and 10756 transitions. [2023-02-14 13:13:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2023-02-14 13:13:23,979 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 60 states have (on average 1.7666666666666666) internal successors, (106), 55 states have internal predecessors, (106), 25 states have call successors, (33), 10 states have call predecessors, (33), 17 states have return successors, (27), 25 states have call predecessors, (27), 19 states have call successors, (27) Word has length 100 [2023-02-14 13:13:23,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:13:24,002 INFO L225 Difference]: With dead ends: 3651 [2023-02-14 13:13:24,003 INFO L226 Difference]: Without dead ends: 3649 [2023-02-14 13:13:24,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12191 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=2434, Invalid=44006, Unknown=0, NotChecked=0, Total=46440 [2023-02-14 13:13:24,006 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 251 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 13102 mSolverCounterSat, 234 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 13358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 13102 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:13:24,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1207 Invalid, 13358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 13102 Invalid, 22 Unknown, 0 Unchecked, 7.1s Time] [2023-02-14 13:13:24,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3649 states. [2023-02-14 13:13:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3649 to 2378. [2023-02-14 13:13:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 1740 states have (on average 1.2402298850574713) internal successors, (2158), 1863 states have internal predecessors, (2158), 158 states have call successors, (158), 75 states have call predecessors, (158), 479 states have return successors, (4651), 439 states have call predecessors, (4651), 112 states have call successors, (4651) [2023-02-14 13:13:24,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6967 transitions. [2023-02-14 13:13:24,500 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6967 transitions. Word has length 100 [2023-02-14 13:13:24,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:13:24,500 INFO L495 AbstractCegarLoop]: Abstraction has 2378 states and 6967 transitions. [2023-02-14 13:13:24,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 60 states have (on average 1.7666666666666666) internal successors, (106), 55 states have internal predecessors, (106), 25 states have call successors, (33), 10 states have call predecessors, (33), 17 states have return successors, (27), 25 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-14 13:13:24,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6967 transitions. [2023-02-14 13:13:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-14 13:13:24,512 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:13:24,512 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:13:24,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-14 13:13:24,719 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,SelfDestructingSolverStorable21 [2023-02-14 13:13:24,719 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:13:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:13:24,719 INFO L85 PathProgramCache]: Analyzing trace with hash -339177979, now seen corresponding path program 3 times [2023-02-14 13:13:24,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:13:24,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848719371] [2023-02-14 13:13:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:13:24,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:13:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:25,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:13:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:25,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:13:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:25,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:13:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:25,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:13:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:25,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:13:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:26,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:13:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:26,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:13:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:26,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-14 13:13:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:26,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:13:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:26,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:13:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:26,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:13:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:26,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:13:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:26,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:13:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:26,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 13:13:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 27 proven. 85 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-14 13:13:26,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:13:26,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848719371] [2023-02-14 13:13:26,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848719371] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:13:26,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109138675] [2023-02-14 13:13:26,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:13:26,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:13:26,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:13:26,630 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) [2023-02-14 13:13:26,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 13:13:27,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-14 13:13:27,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:13:27,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 154 conjunts are in the unsatisfiable core [2023-02-14 13:13:27,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:13:27,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-14 13:13:27,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:13:27,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-14 13:13:27,258 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base Int) (v_ArrVal_3220 (Array Int Int)) (v_ArrVal_3219 (Array Int Int))) (and (= (select |c_old(#valid)| nondet_tree_~n~0.base) 0) (= (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_3220) |c_#memory_$Pointer$.base|) (= (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_3219) |c_#memory_$Pointer$.offset|))) is different from true [2023-02-14 13:13:27,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:13:27,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 13:13:27,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:13:27,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-14 13:13:27,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 13:13:27,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 13:13:27,372 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-02-14 13:13:27,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-02-14 13:13:27,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-14 13:13:27,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-14 13:13:28,377 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:13:28,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:13:28,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:13:28,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 48 [2023-02-14 13:13:28,385 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 13:13:28,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 25 [2023-02-14 13:13:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 32 proven. 56 refuted. 0 times theorem prover too weak. 85 trivial. 12 not checked. [2023-02-14 13:13:28,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:13:28,775 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-14 13:13:28,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2023-02-14 13:13:29,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109138675] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:13:29,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:13:29,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32] total 52 [2023-02-14 13:13:29,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167773975] [2023-02-14 13:13:29,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:13:29,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-14 13:13:29,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:13:29,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-14 13:13:29,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=3835, Unknown=1, NotChecked=124, Total=4160 [2023-02-14 13:13:29,260 INFO L87 Difference]: Start difference. First operand 2378 states and 6967 transitions. Second operand has 52 states, 42 states have (on average 2.119047619047619) internal successors, (89), 39 states have internal predecessors, (89), 20 states have call successors, (31), 10 states have call predecessors, (31), 15 states have return successors, (22), 18 states have call predecessors, (22), 17 states have call successors, (22) [2023-02-14 13:13:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:13:34,988 INFO L93 Difference]: Finished difference Result 3879 states and 11321 transitions. [2023-02-14 13:13:34,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-14 13:13:34,993 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 42 states have (on average 2.119047619047619) internal successors, (89), 39 states have internal predecessors, (89), 20 states have call successors, (31), 10 states have call predecessors, (31), 15 states have return successors, (22), 18 states have call predecessors, (22), 17 states have call successors, (22) Word has length 99 [2023-02-14 13:13:34,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:13:35,019 INFO L225 Difference]: With dead ends: 3879 [2023-02-14 13:13:35,019 INFO L226 Difference]: Without dead ends: 3674 [2023-02-14 13:13:35,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=902, Invalid=10657, Unknown=1, NotChecked=212, Total=11772 [2023-02-14 13:13:35,024 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 117 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 4566 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 4790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 4566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-02-14 13:13:35,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 465 Invalid, 4790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 4566 Invalid, 0 Unknown, 126 Unchecked, 2.8s Time] [2023-02-14 13:13:35,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2023-02-14 13:13:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3036. [2023-02-14 13:13:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3036 states, 2215 states have (on average 1.2415349887133182) internal successors, (2750), 2394 states have internal predecessors, (2750), 184 states have call successors, (184), 83 states have call predecessors, (184), 636 states have return successors, (5883), 558 states have call predecessors, (5883), 138 states have call successors, (5883) [2023-02-14 13:13:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3036 states to 3036 states and 8817 transitions. [2023-02-14 13:13:35,461 INFO L78 Accepts]: Start accepts. Automaton has 3036 states and 8817 transitions. Word has length 99 [2023-02-14 13:13:35,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:13:35,462 INFO L495 AbstractCegarLoop]: Abstraction has 3036 states and 8817 transitions. [2023-02-14 13:13:35,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 42 states have (on average 2.119047619047619) internal successors, (89), 39 states have internal predecessors, (89), 20 states have call successors, (31), 10 states have call predecessors, (31), 15 states have return successors, (22), 18 states have call predecessors, (22), 17 states have call successors, (22) [2023-02-14 13:13:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3036 states and 8817 transitions. [2023-02-14 13:13:35,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-02-14 13:13:35,476 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:13:35,476 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:13:35,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-14 13:13:35,683 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,SelfDestructingSolverStorable22 [2023-02-14 13:13:35,683 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:13:35,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:13:35,683 INFO L85 PathProgramCache]: Analyzing trace with hash -888263464, now seen corresponding path program 2 times [2023-02-14 13:13:35,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:13:35,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264720351] [2023-02-14 13:13:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:13:35,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:13:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:36,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:13:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:36,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:13:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:36,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:13:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:36,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:13:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:36,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:13:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:37,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 13:13:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:37,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 13:13:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:37,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-14 13:13:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:37,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:13:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:37,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:13:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:37,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:13:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:37,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:13:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:37,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:13:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:37,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 13:13:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:13:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 41 proven. 86 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-02-14 13:13:37,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:13:37,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264720351] [2023-02-14 13:13:37,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264720351] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:13:37,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6140658] [2023-02-14 13:13:37,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:13:37,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:13:37,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:13:37,796 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) [2023-02-14 13:13:37,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-14 13:13:38,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:13:38,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:13:38,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 135 conjunts are in the unsatisfiable core [2023-02-14 13:13:38,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:13:38,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:13:38,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-14 13:13:39,895 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:13:39,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:13:39,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 47 [2023-02-14 13:13:39,906 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-14 13:13:39,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 29 [2023-02-14 13:13:40,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-14 13:13:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 34 proven. 72 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-02-14 13:13:40,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:13:41,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 13:13:41,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 76