./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/relax-2-2.i --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/array-examples/relax-2-2.i -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 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 09:29:56,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 09:29:56,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 09:29:56,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 09:29:56,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 09:29:56,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 09:29:56,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 09:29:56,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 09:29:56,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 09:29:56,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 09:29:56,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 09:29:56,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 09:29:56,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 09:29:56,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 09:29:56,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 09:29:56,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 09:29:56,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 09:29:56,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 09:29:56,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 09:29:56,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 09:29:56,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 09:29:56,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 09:29:56,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 09:29:56,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 09:29:56,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 09:29:56,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 09:29:56,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 09:29:56,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 09:29:56,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 09:29:56,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 09:29:56,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 09:29:56,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 09:29:56,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 09:29:56,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 09:29:56,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 09:29:56,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 09:29:56,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 09:29:56,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 09:29:56,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 09:29:56,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 09:29:56,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 09:29:56,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 09:29:57,022 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 09:29:57,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 09:29:57,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 09:29:57,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 09:29:57,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 09:29:57,024 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 09:29:57,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 09:29:57,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 09:29:57,024 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 09:29:57,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 09:29:57,025 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 09:29:57,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 09:29:57,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 09:29:57,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 09:29:57,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 09:29:57,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 09:29:57,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 09:29:57,026 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 09:29:57,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 09:29:57,026 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 09:29:57,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 09:29:57,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 09:29:57,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 09:29:57,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 09:29:57,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 09:29:57,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 09:29:57,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 09:29:57,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 09:29:57,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 09:29:57,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 09:29:57,028 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 09:29:57,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 09:29:57,028 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 09:29:57,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 09:29:57,028 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 09:29:57,028 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2023-02-14 09:29:57,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 09:29:57,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 09:29:57,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 09:29:57,248 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 09:29:57,248 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 09:29:57,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/relax-2-2.i [2023-02-14 09:29:58,193 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 09:29:58,418 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 09:29:58,419 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i [2023-02-14 09:29:58,432 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/381a96d5a/f1f13851588147b3be202c849902dc0c/FLAG11891ec8b [2023-02-14 09:29:58,807 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/381a96d5a/f1f13851588147b3be202c849902dc0c [2023-02-14 09:29:58,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 09:29:58,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 09:29:58,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 09:29:58,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 09:29:58,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 09:29:58,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:29:58" (1/1) ... [2023-02-14 09:29:58,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb0da81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:29:58, skipping insertion in model container [2023-02-14 09:29:58,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:29:58" (1/1) ... [2023-02-14 09:29:58,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 09:29:58,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 09:29:59,050 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/array-examples/relax-2-2.i[982,995] [2023-02-14 09:29:59,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 09:29:59,234 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 09:29:59,243 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/array-examples/relax-2-2.i[982,995] [2023-02-14 09:29:59,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 09:29:59,293 INFO L208 MainTranslator]: Completed translation [2023-02-14 09:29:59,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:29:59 WrapperNode [2023-02-14 09:29:59,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 09:29:59,294 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 09:29:59,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 09:29:59,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 09:29:59,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:29:59" (1/1) ... [2023-02-14 09:29:59,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:29:59" (1/1) ... [2023-02-14 09:29:59,341 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 137 [2023-02-14 09:29:59,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 09:29:59,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 09:29:59,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 09:29:59,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 09:29:59,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:29:59" (1/1) ... [2023-02-14 09:29:59,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:29:59" (1/1) ... [2023-02-14 09:29:59,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:29:59" (1/1) ... [2023-02-14 09:29:59,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:29:59" (1/1) ... [2023-02-14 09:29:59,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:29:59" (1/1) ... [2023-02-14 09:29:59,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:29:59" (1/1) ... [2023-02-14 09:29:59,358 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:29:59" (1/1) ... [2023-02-14 09:29:59,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:29:59" (1/1) ... [2023-02-14 09:29:59,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 09:29:59,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 09:29:59,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 09:29:59,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 09:29:59,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:29:59" (1/1) ... [2023-02-14 09:29:59,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 09:29:59,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:29:59,440 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 09:29:59,441 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 09:29:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 09:29:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 09:29:59,474 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 09:29:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 09:29:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 09:29:59,475 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 09:29:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 09:29:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 09:29:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 09:29:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 09:29:59,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 09:29:59,602 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 09:29:59,618 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 09:29:59,859 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 09:29:59,863 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 09:29:59,864 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-14 09:29:59,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:29:59 BoogieIcfgContainer [2023-02-14 09:29:59,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 09:29:59,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 09:29:59,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 09:29:59,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 09:29:59,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:29:58" (1/3) ... [2023-02-14 09:29:59,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3315a764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:29:59, skipping insertion in model container [2023-02-14 09:29:59,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:29:59" (2/3) ... [2023-02-14 09:29:59,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3315a764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:29:59, skipping insertion in model container [2023-02-14 09:29:59,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:29:59" (3/3) ... [2023-02-14 09:29:59,873 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2023-02-14 09:29:59,903 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 09:29:59,904 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 09:29:59,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 09:29:59,971 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;@1b271810, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 09:29:59,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 09:29:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:29:59,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 09:29:59,981 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:29:59,982 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:29:59,982 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:29:59,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:29:59,987 INFO L85 PathProgramCache]: Analyzing trace with hash 424197970, now seen corresponding path program 1 times [2023-02-14 09:29:59,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:29:59,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985218638] [2023-02-14 09:29:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:29:59,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:00,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:00,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 09:30:00,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:00,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985218638] [2023-02-14 09:30:00,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985218638] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:30:00,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 09:30:00,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 09:30:00,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262359290] [2023-02-14 09:30:00,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:00,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 09:30:00,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:00,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 09:30:00,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 09:30:00,212 INFO L87 Difference]: Start difference. First operand has 54 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 09:30:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:00,233 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2023-02-14 09:30:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 09:30:00,235 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-02-14 09:30:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:00,239 INFO L225 Difference]: With dead ends: 105 [2023-02-14 09:30:00,239 INFO L226 Difference]: Without dead ends: 50 [2023-02-14 09:30:00,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 09:30:00,244 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:00,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 09:30:00,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-14 09:30:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-14 09:30:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.4) internal successors, (56), 41 states have internal predecessors, (56), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 09:30:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2023-02-14 09:30:00,273 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 24 [2023-02-14 09:30:00,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:00,273 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2023-02-14 09:30:00,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 09:30:00,273 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2023-02-14 09:30:00,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 09:30:00,275 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:00,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:30:00,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 09:30:00,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:00,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash 518459404, now seen corresponding path program 1 times [2023-02-14 09:30:00,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:00,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702482645] [2023-02-14 09:30:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:00,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:00,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:00,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 09:30:00,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:00,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702482645] [2023-02-14 09:30:00,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702482645] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:30:00,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 09:30:00,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 09:30:00,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072692207] [2023-02-14 09:30:00,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:00,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 09:30:00,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:00,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 09:30:00,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 09:30:00,440 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:00,468 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2023-02-14 09:30:00,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 09:30:00,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-02-14 09:30:00,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:00,470 INFO L225 Difference]: With dead ends: 83 [2023-02-14 09:30:00,470 INFO L226 Difference]: Without dead ends: 58 [2023-02-14 09:30:00,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 09:30:00,472 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:00,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 195 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 09:30:00,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-14 09:30:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2023-02-14 09:30:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.380952380952381) internal successors, (58), 43 states have internal predecessors, (58), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 09:30:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2023-02-14 09:30:00,480 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 24 [2023-02-14 09:30:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:00,481 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2023-02-14 09:30:00,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2023-02-14 09:30:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 09:30:00,482 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:00,482 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:30:00,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 09:30:00,482 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:00,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1090015461, now seen corresponding path program 1 times [2023-02-14 09:30:00,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:00,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90908114] [2023-02-14 09:30:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:00,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:00,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:00,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 09:30:00,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:00,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90908114] [2023-02-14 09:30:00,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90908114] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:30:00,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 09:30:00,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 09:30:00,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614326264] [2023-02-14 09:30:00,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:00,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 09:30:00,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:00,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 09:30:00,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 09:30:00,714 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:00,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:00,793 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2023-02-14 09:30:00,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 09:30:00,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-02-14 09:30:00,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:00,798 INFO L225 Difference]: With dead ends: 108 [2023-02-14 09:30:00,798 INFO L226 Difference]: Without dead ends: 72 [2023-02-14 09:30:00,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-14 09:30:00,803 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 50 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:00,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 284 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 09:30:00,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-14 09:30:00,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2023-02-14 09:30:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.396551724137931) internal successors, (81), 59 states have internal predecessors, (81), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 09:30:00,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 94 transitions. [2023-02-14 09:30:00,811 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 94 transitions. Word has length 26 [2023-02-14 09:30:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:00,811 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 94 transitions. [2023-02-14 09:30:00,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:00,811 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 94 transitions. [2023-02-14 09:30:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 09:30:00,812 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:00,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:30:00,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 09:30:00,812 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:00,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:00,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1637522002, now seen corresponding path program 1 times [2023-02-14 09:30:00,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:00,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734868079] [2023-02-14 09:30:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:00,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:01,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:01,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 09:30:01,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:01,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734868079] [2023-02-14 09:30:01,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734868079] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:30:01,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 09:30:01,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 09:30:01,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907446439] [2023-02-14 09:30:01,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:01,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 09:30:01,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:01,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 09:30:01,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-14 09:30:01,121 INFO L87 Difference]: Start difference. First operand 68 states and 94 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:01,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:01,284 INFO L93 Difference]: Finished difference Result 110 states and 147 transitions. [2023-02-14 09:30:01,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 09:30:01,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-02-14 09:30:01,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:01,288 INFO L225 Difference]: With dead ends: 110 [2023-02-14 09:30:01,288 INFO L226 Difference]: Without dead ends: 98 [2023-02-14 09:30:01,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-14 09:30:01,296 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 120 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:01,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 350 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 09:30:01,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-14 09:30:01,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2023-02-14 09:30:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 67 states have internal predecessors, (93), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 09:30:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2023-02-14 09:30:01,308 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 27 [2023-02-14 09:30:01,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:01,308 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2023-02-14 09:30:01,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2023-02-14 09:30:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 09:30:01,309 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:01,309 INFO L195 NwaCegarLoop]: trace histogram [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 09:30:01,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 09:30:01,310 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:01,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:01,310 INFO L85 PathProgramCache]: Analyzing trace with hash -703814141, now seen corresponding path program 1 times [2023-02-14 09:30:01,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:01,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539274235] [2023-02-14 09:30:01,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:01,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:01,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:01,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 09:30:01,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:01,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539274235] [2023-02-14 09:30:01,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539274235] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:01,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455307773] [2023-02-14 09:30:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:01,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:01,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:01,589 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 09:30:01,590 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 09:30:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:01,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 09:30:01,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:01,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 09:30:01,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455307773] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:30:01,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 09:30:01,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2023-02-14 09:30:01,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23522009] [2023-02-14 09:30:01,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:01,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 09:30:01,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:01,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 09:30:01,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-02-14 09:30:01,856 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:01,938 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2023-02-14 09:30:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 09:30:01,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-02-14 09:30:01,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:01,939 INFO L225 Difference]: With dead ends: 88 [2023-02-14 09:30:01,939 INFO L226 Difference]: Without dead ends: 86 [2023-02-14 09:30:01,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-14 09:30:01,940 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 76 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:01,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 186 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 09:30:01,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-14 09:30:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2023-02-14 09:30:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.391304347826087) internal successors, (96), 70 states have internal predecessors, (96), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 09:30:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 109 transitions. [2023-02-14 09:30:01,949 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 109 transitions. Word has length 28 [2023-02-14 09:30:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:01,949 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 109 transitions. [2023-02-14 09:30:01,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 109 transitions. [2023-02-14 09:30:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 09:30:01,950 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:01,950 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 09:30:01,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 09:30:02,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:02,156 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:02,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:02,156 INFO L85 PathProgramCache]: Analyzing trace with hash 338610741, now seen corresponding path program 1 times [2023-02-14 09:30:02,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:02,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119871932] [2023-02-14 09:30:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:02,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:02,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:02,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 09:30:02,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:02,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119871932] [2023-02-14 09:30:02,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119871932] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:30:02,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 09:30:02,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 09:30:02,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688939566] [2023-02-14 09:30:02,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:02,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 09:30:02,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:02,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 09:30:02,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 09:30:02,228 INFO L87 Difference]: Start difference. First operand 80 states and 109 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:02,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:02,254 INFO L93 Difference]: Finished difference Result 97 states and 128 transitions. [2023-02-14 09:30:02,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 09:30:02,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-14 09:30:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:02,256 INFO L225 Difference]: With dead ends: 97 [2023-02-14 09:30:02,256 INFO L226 Difference]: Without dead ends: 79 [2023-02-14 09:30:02,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 09:30:02,257 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 17 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:02,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 175 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 09:30:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-14 09:30:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-02-14 09:30:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 69 states have internal predecessors, (92), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 09:30:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2023-02-14 09:30:02,277 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 29 [2023-02-14 09:30:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:02,277 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2023-02-14 09:30:02,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2023-02-14 09:30:02,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 09:30:02,278 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:02,278 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 09:30:02,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-14 09:30:02,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:02,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:02,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1088390000, now seen corresponding path program 1 times [2023-02-14 09:30:02,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:02,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871985208] [2023-02-14 09:30:02,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:02,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:02,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:02,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:02,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871985208] [2023-02-14 09:30:02,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871985208] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:30:02,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 09:30:02,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 09:30:02,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872914052] [2023-02-14 09:30:02,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:02,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 09:30:02,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:02,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 09:30:02,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 09:30:02,414 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:02,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:02,465 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2023-02-14 09:30:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 09:30:02,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-14 09:30:02,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:02,466 INFO L225 Difference]: With dead ends: 90 [2023-02-14 09:30:02,466 INFO L226 Difference]: Without dead ends: 58 [2023-02-14 09:30:02,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 09:30:02,467 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 11 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:02,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 227 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 09:30:02,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-14 09:30:02,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-02-14 09:30:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.326086956521739) internal successors, (61), 47 states have internal predecessors, (61), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 09:30:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2023-02-14 09:30:02,473 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 29 [2023-02-14 09:30:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:02,473 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2023-02-14 09:30:02,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2023-02-14 09:30:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 09:30:02,474 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:02,474 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 09:30:02,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-14 09:30:02,474 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:02,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1413511858, now seen corresponding path program 1 times [2023-02-14 09:30:02,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:02,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663659370] [2023-02-14 09:30:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:02,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:02,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:02,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 09:30:02,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:02,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663659370] [2023-02-14 09:30:02,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663659370] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:02,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662224296] [2023-02-14 09:30:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:02,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:02,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:02,665 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 09:30:02,667 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 09:30:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:02,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 09:30:02,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:02,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 09:30:02,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662224296] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:30:02,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 09:30:02,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-02-14 09:30:02,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628930765] [2023-02-14 09:30:02,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:02,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 09:30:02,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:02,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 09:30:02,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-14 09:30:02,747 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:02,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:02,808 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2023-02-14 09:30:02,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 09:30:02,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-14 09:30:02,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:02,809 INFO L225 Difference]: With dead ends: 71 [2023-02-14 09:30:02,810 INFO L226 Difference]: Without dead ends: 57 [2023-02-14 09:30:02,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-14 09:30:02,810 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 39 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:02,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 114 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 09:30:02,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-14 09:30:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-02-14 09:30:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 09:30:02,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2023-02-14 09:30:02,815 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 29 [2023-02-14 09:30:02,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:02,815 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2023-02-14 09:30:02,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:02,815 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2023-02-14 09:30:02,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 09:30:02,816 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:02,816 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 09:30:02,835 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 09:30:03,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-14 09:30:03,036 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:03,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:03,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1264785641, now seen corresponding path program 1 times [2023-02-14 09:30:03,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:03,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506082086] [2023-02-14 09:30:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:03,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:03,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:03,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:03,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:03,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506082086] [2023-02-14 09:30:03,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506082086] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:30:03,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 09:30:03,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 09:30:03,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295047430] [2023-02-14 09:30:03,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:03,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 09:30:03,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:03,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 09:30:03,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 09:30:03,066 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:03,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:03,080 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2023-02-14 09:30:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 09:30:03,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-02-14 09:30:03,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:03,082 INFO L225 Difference]: With dead ends: 93 [2023-02-14 09:30:03,082 INFO L226 Difference]: Without dead ends: 79 [2023-02-14 09:30:03,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 09:30:03,083 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:03,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 130 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 09:30:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-14 09:30:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2023-02-14 09:30:03,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 52 states have internal predecessors, (67), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 09:30:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2023-02-14 09:30:03,095 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 31 [2023-02-14 09:30:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:03,095 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2023-02-14 09:30:03,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2023-02-14 09:30:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 09:30:03,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:03,099 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-14 09:30:03,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-14 09:30:03,099 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:03,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:03,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1196949427, now seen corresponding path program 1 times [2023-02-14 09:30:03,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:03,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968118497] [2023-02-14 09:30:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:03,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:03,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:03,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:03,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:03,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968118497] [2023-02-14 09:30:03,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968118497] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:03,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752751673] [2023-02-14 09:30:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:03,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:03,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:03,280 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 09:30:03,282 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 09:30:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:03,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 09:30:03,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:03,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 09:30:03,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752751673] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:30:03,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 09:30:03,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2023-02-14 09:30:03,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728204663] [2023-02-14 09:30:03,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:03,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 09:30:03,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:03,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 09:30:03,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-14 09:30:03,385 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:03,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:03,464 INFO L93 Difference]: Finished difference Result 124 states and 160 transitions. [2023-02-14 09:30:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 09:30:03,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-02-14 09:30:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:03,465 INFO L225 Difference]: With dead ends: 124 [2023-02-14 09:30:03,465 INFO L226 Difference]: Without dead ends: 64 [2023-02-14 09:30:03,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-02-14 09:30:03,466 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 38 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:03,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 232 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 09:30:03,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-14 09:30:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-02-14 09:30:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 53 states have internal predecessors, (68), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 09:30:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2023-02-14 09:30:03,471 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 35 [2023-02-14 09:30:03,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:03,472 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2023-02-14 09:30:03,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2023-02-14 09:30:03,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 09:30:03,472 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:03,473 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-02-14 09:30:03,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 09:30:03,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:03,677 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:03,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1163666735, now seen corresponding path program 1 times [2023-02-14 09:30:03,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:03,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664543657] [2023-02-14 09:30:03,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:03,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:03,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:03,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:03,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:03,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664543657] [2023-02-14 09:30:03,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664543657] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:03,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785064120] [2023-02-14 09:30:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:03,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:03,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:03,774 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 09:30:03,776 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 09:30:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:03,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 09:30:03,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:03,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:04,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785064120] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:04,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:04,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 10] total 15 [2023-02-14 09:30:04,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413879660] [2023-02-14 09:30:04,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:04,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 09:30:04,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:04,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 09:30:04,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-02-14 09:30:04,076 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:04,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:04,259 INFO L93 Difference]: Finished difference Result 148 states and 198 transitions. [2023-02-14 09:30:04,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 09:30:04,259 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-02-14 09:30:04,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:04,260 INFO L225 Difference]: With dead ends: 148 [2023-02-14 09:30:04,260 INFO L226 Difference]: Without dead ends: 125 [2023-02-14 09:30:04,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-02-14 09:30:04,262 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 119 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:04,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 684 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 09:30:04,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-14 09:30:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2023-02-14 09:30:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2023-02-14 09:30:04,271 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 37 [2023-02-14 09:30:04,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:04,271 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2023-02-14 09:30:04,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2023-02-14 09:30:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 09:30:04,273 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:04,273 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-02-14 09:30:04,289 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 09:30:04,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:04,478 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:04,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1165513777, now seen corresponding path program 1 times [2023-02-14 09:30:04,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:04,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860388879] [2023-02-14 09:30:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:04,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:04,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:04,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:04,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:04,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860388879] [2023-02-14 09:30:04,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860388879] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:04,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711514110] [2023-02-14 09:30:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:04,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:04,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:04,723 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 09:30:04,725 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 09:30:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:04,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 09:30:04,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 09:30:04,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 09:30:04,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711514110] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:30:04,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 09:30:04,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2023-02-14 09:30:04,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348632179] [2023-02-14 09:30:04,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:04,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 09:30:04,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:04,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 09:30:04,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-02-14 09:30:04,827 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:04,897 INFO L93 Difference]: Finished difference Result 127 states and 166 transitions. [2023-02-14 09:30:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 09:30:04,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-02-14 09:30:04,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:04,898 INFO L225 Difference]: With dead ends: 127 [2023-02-14 09:30:04,899 INFO L226 Difference]: Without dead ends: 113 [2023-02-14 09:30:04,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-02-14 09:30:04,899 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 55 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:04,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 141 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 09:30:04,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-14 09:30:04,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2023-02-14 09:30:04,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 88 states have internal predecessors, (114), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 129 transitions. [2023-02-14 09:30:04,908 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 129 transitions. Word has length 37 [2023-02-14 09:30:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:04,908 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 129 transitions. [2023-02-14 09:30:04,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 129 transitions. [2023-02-14 09:30:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 09:30:04,908 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:04,909 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:30:04,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 09:30:05,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-14 09:30:05,113 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:05,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:05,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2034579695, now seen corresponding path program 1 times [2023-02-14 09:30:05,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:05,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528924440] [2023-02-14 09:30:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:05,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:05,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:05,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 09:30:05,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:05,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528924440] [2023-02-14 09:30:05,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528924440] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:05,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156505627] [2023-02-14 09:30:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:05,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:05,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:05,237 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 09:30:05,258 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 09:30:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:05,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 09:30:05,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 09:30:05,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:05,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156505627] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:05,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:05,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 18 [2023-02-14 09:30:05,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839402065] [2023-02-14 09:30:05,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:05,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 09:30:05,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:05,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 09:30:05,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-02-14 09:30:05,446 INFO L87 Difference]: Start difference. First operand 99 states and 129 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:05,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:05,777 INFO L93 Difference]: Finished difference Result 269 states and 362 transitions. [2023-02-14 09:30:05,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 09:30:05,778 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-02-14 09:30:05,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:05,779 INFO L225 Difference]: With dead ends: 269 [2023-02-14 09:30:05,779 INFO L226 Difference]: Without dead ends: 192 [2023-02-14 09:30:05,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-02-14 09:30:05,779 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 437 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:05,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 622 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 09:30:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-14 09:30:05,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 122. [2023-02-14 09:30:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.3) internal successors, (143), 111 states have internal predecessors, (143), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2023-02-14 09:30:05,795 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 38 [2023-02-14 09:30:05,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:05,796 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2023-02-14 09:30:05,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:05,796 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2023-02-14 09:30:05,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 09:30:05,796 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:05,797 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-02-14 09:30:05,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 09:30:06,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:06,002 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:06,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:06,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2103922323, now seen corresponding path program 1 times [2023-02-14 09:30:06,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:06,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822630261] [2023-02-14 09:30:06,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:06,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:06,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:06,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:06,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 09:30:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:06,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:06,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822630261] [2023-02-14 09:30:06,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822630261] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:06,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078916188] [2023-02-14 09:30:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:06,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:06,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:06,168 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 09:30:06,172 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 09:30:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:06,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 09:30:06,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 09:30:06,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 09:30:06,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078916188] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:30:06,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 09:30:06,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-02-14 09:30:06,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290538962] [2023-02-14 09:30:06,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:06,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 09:30:06,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:06,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 09:30:06,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-02-14 09:30:06,323 INFO L87 Difference]: Start difference. First operand 122 states and 158 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 09:30:06,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:06,417 INFO L93 Difference]: Finished difference Result 167 states and 214 transitions. [2023-02-14 09:30:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 09:30:06,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2023-02-14 09:30:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:06,418 INFO L225 Difference]: With dead ends: 167 [2023-02-14 09:30:06,418 INFO L226 Difference]: Without dead ends: 132 [2023-02-14 09:30:06,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-02-14 09:30:06,419 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 61 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:06,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 138 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 09:30:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-14 09:30:06,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2023-02-14 09:30:06,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 112 states have (on average 1.2767857142857142) internal successors, (143), 113 states have internal predecessors, (143), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:06,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2023-02-14 09:30:06,435 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 42 [2023-02-14 09:30:06,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:06,435 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2023-02-14 09:30:06,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 09:30:06,435 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2023-02-14 09:30:06,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 09:30:06,436 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:06,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:30:06,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 09:30:06,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:06,641 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:06,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:06,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1093284825, now seen corresponding path program 1 times [2023-02-14 09:30:06,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:06,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223183206] [2023-02-14 09:30:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:06,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:06,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:06,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 09:30:06,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:06,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223183206] [2023-02-14 09:30:06,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223183206] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:06,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088222365] [2023-02-14 09:30:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:06,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:06,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:06,749 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 09:30:06,801 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 09:30:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:06,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-14 09:30:06,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:07,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 09:30:07,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088222365] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:07,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:07,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2023-02-14 09:30:07,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808385279] [2023-02-14 09:30:07,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:07,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 09:30:07,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:07,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 09:30:07,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-02-14 09:30:07,146 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:08,103 INFO L93 Difference]: Finished difference Result 350 states and 484 transitions. [2023-02-14 09:30:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-14 09:30:08,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2023-02-14 09:30:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:08,105 INFO L225 Difference]: With dead ends: 350 [2023-02-14 09:30:08,105 INFO L226 Difference]: Without dead ends: 320 [2023-02-14 09:30:08,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=322, Invalid=1658, Unknown=0, NotChecked=0, Total=1980 [2023-02-14 09:30:08,106 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 534 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:08,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 1260 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 09:30:08,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-02-14 09:30:08,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 166. [2023-02-14 09:30:08,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 154 states have (on average 1.3311688311688312) internal successors, (205), 155 states have internal predecessors, (205), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:08,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 220 transitions. [2023-02-14 09:30:08,132 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 220 transitions. Word has length 42 [2023-02-14 09:30:08,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:08,132 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 220 transitions. [2023-02-14 09:30:08,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:08,133 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 220 transitions. [2023-02-14 09:30:08,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 09:30:08,133 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:08,133 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:30:08,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 09:30:08,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 09:30:08,338 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:08,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:08,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1902631451, now seen corresponding path program 1 times [2023-02-14 09:30:08,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:08,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641070444] [2023-02-14 09:30:08,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:08,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:08,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:08,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 09:30:08,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:08,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641070444] [2023-02-14 09:30:08,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641070444] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:08,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536429132] [2023-02-14 09:30:08,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:08,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:08,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:08,793 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 09:30:08,809 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 09:30:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:08,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-14 09:30:08,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:08,996 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 15 treesize of output 11 [2023-02-14 09:30:09,153 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 09:30:09,155 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 09:30:09,161 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-14 09:30:09,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2023-02-14 09:30:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 09:30:09,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 09:30:09,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536429132] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:09,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 09:30:09,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11, 17] total 31 [2023-02-14 09:30:09,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662155045] [2023-02-14 09:30:09,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:09,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 09:30:09,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:09,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 09:30:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2023-02-14 09:30:09,392 INFO L87 Difference]: Start difference. First operand 166 states and 220 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:09,706 INFO L93 Difference]: Finished difference Result 297 states and 404 transitions. [2023-02-14 09:30:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 09:30:09,706 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2023-02-14 09:30:09,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:09,707 INFO L225 Difference]: With dead ends: 297 [2023-02-14 09:30:09,707 INFO L226 Difference]: Without dead ends: 288 [2023-02-14 09:30:09,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 09:30:09,708 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 117 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:09,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 676 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 09:30:09,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-02-14 09:30:09,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 207. [2023-02-14 09:30:09,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 195 states have (on average 1.353846153846154) internal successors, (264), 196 states have internal predecessors, (264), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:09,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 279 transitions. [2023-02-14 09:30:09,742 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 279 transitions. Word has length 42 [2023-02-14 09:30:09,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:09,743 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 279 transitions. [2023-02-14 09:30:09,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:09,743 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 279 transitions. [2023-02-14 09:30:09,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 09:30:09,743 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:09,743 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:30:09,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 09:30:09,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-14 09:30:09,948 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:09,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:09,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1797758865, now seen corresponding path program 1 times [2023-02-14 09:30:09,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:09,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033912365] [2023-02-14 09:30:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:09,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:10,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:10,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 09:30:10,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:10,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033912365] [2023-02-14 09:30:10,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033912365] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:10,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136070516] [2023-02-14 09:30:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:10,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:10,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:10,161 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 09:30:10,164 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 09:30:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:10,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 09:30:10,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 09:30:10,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 09:30:10,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136070516] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:10,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:10,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-02-14 09:30:10,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742902208] [2023-02-14 09:30:10,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:10,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 09:30:10,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:10,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 09:30:10,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-02-14 09:30:10,389 INFO L87 Difference]: Start difference. First operand 207 states and 279 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:10,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:10,626 INFO L93 Difference]: Finished difference Result 258 states and 342 transitions. [2023-02-14 09:30:10,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 09:30:10,626 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-02-14 09:30:10,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:10,627 INFO L225 Difference]: With dead ends: 258 [2023-02-14 09:30:10,627 INFO L226 Difference]: Without dead ends: 182 [2023-02-14 09:30:10,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2023-02-14 09:30:10,628 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 173 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:10,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 648 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 09:30:10,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-14 09:30:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2023-02-14 09:30:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 146 states have (on average 1.321917808219178) internal successors, (193), 147 states have internal predecessors, (193), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 208 transitions. [2023-02-14 09:30:10,648 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 208 transitions. Word has length 43 [2023-02-14 09:30:10,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:10,649 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 208 transitions. [2023-02-14 09:30:10,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 208 transitions. [2023-02-14 09:30:10,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 09:30:10,649 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:10,649 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:30:10,671 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 09:30:10,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-14 09:30:10,854 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:10,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:10,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2052626821, now seen corresponding path program 1 times [2023-02-14 09:30:10,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:10,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942939127] [2023-02-14 09:30:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:10,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:10,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:10,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:10,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-14 09:30:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 09:30:10,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:10,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942939127] [2023-02-14 09:30:10,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942939127] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:10,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494586389] [2023-02-14 09:30:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:10,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:10,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:10,978 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 09:30:11,015 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 09:30:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:11,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 09:30:11,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 09:30:11,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 09:30:11,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494586389] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:30:11,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 09:30:11,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-02-14 09:30:11,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111542026] [2023-02-14 09:30:11,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:11,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 09:30:11,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:11,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 09:30:11,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-14 09:30:11,061 INFO L87 Difference]: Start difference. First operand 158 states and 208 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 09:30:11,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:11,101 INFO L93 Difference]: Finished difference Result 188 states and 247 transitions. [2023-02-14 09:30:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 09:30:11,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-02-14 09:30:11,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:11,102 INFO L225 Difference]: With dead ends: 188 [2023-02-14 09:30:11,102 INFO L226 Difference]: Without dead ends: 167 [2023-02-14 09:30:11,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-14 09:30:11,103 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:11,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 122 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 09:30:11,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-14 09:30:11,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 162. [2023-02-14 09:30:11,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 150 states have (on average 1.3266666666666667) internal successors, (199), 151 states have internal predecessors, (199), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 214 transitions. [2023-02-14 09:30:11,124 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 214 transitions. Word has length 45 [2023-02-14 09:30:11,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:11,124 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 214 transitions. [2023-02-14 09:30:11,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 09:30:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 214 transitions. [2023-02-14 09:30:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 09:30:11,125 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:11,125 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-02-14 09:30:11,147 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 09:30:11,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 09:30:11,330 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:11,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1015993583, now seen corresponding path program 2 times [2023-02-14 09:30:11,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:11,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629406943] [2023-02-14 09:30:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:11,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:11,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:11,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 09:30:11,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:11,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629406943] [2023-02-14 09:30:11,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629406943] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:11,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591745828] [2023-02-14 09:30:11,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 09:30:11,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:11,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:11,689 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 09:30:11,690 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 09:30:11,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 09:30:11,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:30:11,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 09:30:11,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 09:30:11,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 09:30:12,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591745828] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:12,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:12,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 24 [2023-02-14 09:30:12,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084886926] [2023-02-14 09:30:12,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:12,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 09:30:12,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:12,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 09:30:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2023-02-14 09:30:12,026 INFO L87 Difference]: Start difference. First operand 162 states and 214 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:13,471 INFO L93 Difference]: Finished difference Result 661 states and 912 transitions. [2023-02-14 09:30:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-14 09:30:13,471 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-02-14 09:30:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:13,475 INFO L225 Difference]: With dead ends: 661 [2023-02-14 09:30:13,475 INFO L226 Difference]: Without dead ends: 551 [2023-02-14 09:30:13,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=584, Invalid=2608, Unknown=0, NotChecked=0, Total=3192 [2023-02-14 09:30:13,477 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 768 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:13,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 1346 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 09:30:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-02-14 09:30:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 236. [2023-02-14 09:30:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 224 states have (on average 1.34375) internal successors, (301), 225 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 316 transitions. [2023-02-14 09:30:13,532 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 316 transitions. Word has length 45 [2023-02-14 09:30:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:13,532 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 316 transitions. [2023-02-14 09:30:13,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:13,533 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 316 transitions. [2023-02-14 09:30:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 09:30:13,533 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:13,533 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-02-14 09:30:13,545 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 09:30:13,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:13,738 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:13,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:13,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1957197463, now seen corresponding path program 1 times [2023-02-14 09:30:13,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:13,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938511571] [2023-02-14 09:30:13,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:13,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:14,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:14,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 09:30:14,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:14,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938511571] [2023-02-14 09:30:14,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938511571] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:14,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343448226] [2023-02-14 09:30:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:14,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:14,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:14,467 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 09:30:14,469 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 09:30:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:14,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-14 09:30:14,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:14,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 09:30:14,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 09:30:14,913 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 09:30:14,914 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 09:30:14,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 09:30:14,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 42 [2023-02-14 09:30:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:14,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:15,221 INFO L321 Elim1Store]: treesize reduction 17, result has 83.0 percent of original size [2023-02-14 09:30:15,221 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 37 treesize of output 90 [2023-02-14 09:30:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 09:30:15,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343448226] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:15,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:15,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 12] total 33 [2023-02-14 09:30:15,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237515561] [2023-02-14 09:30:15,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:15,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 09:30:15,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:15,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 09:30:15,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 09:30:15,689 INFO L87 Difference]: Start difference. First operand 236 states and 316 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:17,457 INFO L93 Difference]: Finished difference Result 587 states and 796 transitions. [2023-02-14 09:30:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-14 09:30:17,457 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-02-14 09:30:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:17,460 INFO L225 Difference]: With dead ends: 587 [2023-02-14 09:30:17,460 INFO L226 Difference]: Without dead ends: 455 [2023-02-14 09:30:17,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2023-02-14 09:30:17,463 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 383 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:17,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1966 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1939 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 09:30:17,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-02-14 09:30:17,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 260. [2023-02-14 09:30:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 248 states have (on average 1.3346774193548387) internal successors, (331), 249 states have internal predecessors, (331), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 346 transitions. [2023-02-14 09:30:17,510 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 346 transitions. Word has length 48 [2023-02-14 09:30:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:17,510 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 346 transitions. [2023-02-14 09:30:17,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:17,510 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 346 transitions. [2023-02-14 09:30:17,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 09:30:17,511 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:17,511 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-02-14 09:30:17,517 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 09:30:17,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-02-14 09:30:17,716 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:17,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:17,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1256132885, now seen corresponding path program 1 times [2023-02-14 09:30:17,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:17,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007742872] [2023-02-14 09:30:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:17,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:18,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:18,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 09:30:18,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:18,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007742872] [2023-02-14 09:30:18,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007742872] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:18,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742171135] [2023-02-14 09:30:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:18,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:18,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:18,367 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 09:30:18,392 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 09:30:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-14 09:30:18,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:18,628 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 09:30:18,629 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 09:30:18,635 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2023-02-14 09:30:18,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2023-02-14 09:30:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 09:30:18,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:18,819 INFO L321 Elim1Store]: treesize reduction 15, result has 84.2 percent of original size [2023-02-14 09:30:18,819 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 35 treesize of output 87 [2023-02-14 09:30:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 09:30:19,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742171135] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:19,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:19,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 28 [2023-02-14 09:30:19,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453588095] [2023-02-14 09:30:19,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:19,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 09:30:19,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:19,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 09:30:19,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2023-02-14 09:30:19,043 INFO L87 Difference]: Start difference. First operand 260 states and 346 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:19,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:19,542 INFO L93 Difference]: Finished difference Result 487 states and 655 transitions. [2023-02-14 09:30:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 09:30:19,542 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-02-14 09:30:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:19,544 INFO L225 Difference]: With dead ends: 487 [2023-02-14 09:30:19,544 INFO L226 Difference]: Without dead ends: 355 [2023-02-14 09:30:19,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 09:30:19,546 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 244 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:19,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 982 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 09:30:19,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-02-14 09:30:19,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 243. [2023-02-14 09:30:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 231 states have (on average 1.303030303030303) internal successors, (301), 232 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:19,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 316 transitions. [2023-02-14 09:30:19,587 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 316 transitions. Word has length 48 [2023-02-14 09:30:19,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:19,587 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 316 transitions. [2023-02-14 09:30:19,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:19,587 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 316 transitions. [2023-02-14 09:30:19,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 09:30:19,588 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:19,588 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:30:19,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-14 09:30:19,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:19,793 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:19,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:19,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1737037141, now seen corresponding path program 1 times [2023-02-14 09:30:19,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:19,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394254633] [2023-02-14 09:30:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:19,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:19,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:19,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:19,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-14 09:30:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 09:30:19,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:19,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394254633] [2023-02-14 09:30:19,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394254633] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:30:19,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 09:30:19,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 09:30:19,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490040452] [2023-02-14 09:30:19,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:30:19,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 09:30:19,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:19,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 09:30:19,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 09:30:19,840 INFO L87 Difference]: Start difference. First operand 243 states and 316 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 09:30:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:19,890 INFO L93 Difference]: Finished difference Result 266 states and 343 transitions. [2023-02-14 09:30:19,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 09:30:19,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-02-14 09:30:19,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:19,891 INFO L225 Difference]: With dead ends: 266 [2023-02-14 09:30:19,891 INFO L226 Difference]: Without dead ends: 244 [2023-02-14 09:30:19,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-14 09:30:19,892 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:19,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 117 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 09:30:19,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-14 09:30:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2023-02-14 09:30:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 230 states have (on average 1.2956521739130435) internal successors, (298), 231 states have internal predecessors, (298), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 313 transitions. [2023-02-14 09:30:19,928 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 313 transitions. Word has length 50 [2023-02-14 09:30:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:19,928 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 313 transitions. [2023-02-14 09:30:19,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 09:30:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 313 transitions. [2023-02-14 09:30:19,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 09:30:19,931 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:19,931 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:30:19,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-14 09:30:19,932 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:19,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash -23820843, now seen corresponding path program 1 times [2023-02-14 09:30:19,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:19,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848356398] [2023-02-14 09:30:19,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:19,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:20,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:20,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 09:30:20,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:20,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848356398] [2023-02-14 09:30:20,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848356398] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:20,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221412224] [2023-02-14 09:30:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:20,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:20,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:20,107 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 09:30:20,123 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 09:30:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:20,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 09:30:20,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 09:30:20,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 09:30:20,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221412224] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:20,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:20,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-02-14 09:30:20,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785229566] [2023-02-14 09:30:20,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:20,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 09:30:20,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 09:30:20,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-02-14 09:30:20,491 INFO L87 Difference]: Start difference. First operand 242 states and 313 transitions. Second operand has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:22,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:22,270 INFO L93 Difference]: Finished difference Result 689 states and 913 transitions. [2023-02-14 09:30:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-14 09:30:22,270 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2023-02-14 09:30:22,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:22,272 INFO L225 Difference]: With dead ends: 689 [2023-02-14 09:30:22,272 INFO L226 Difference]: Without dead ends: 681 [2023-02-14 09:30:22,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=662, Invalid=3628, Unknown=0, NotChecked=0, Total=4290 [2023-02-14 09:30:22,274 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 1733 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:22,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1733 Valid, 1788 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 09:30:22,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2023-02-14 09:30:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 245. [2023-02-14 09:30:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 233 states have (on average 1.2918454935622317) internal successors, (301), 234 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 316 transitions. [2023-02-14 09:30:22,320 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 316 transitions. Word has length 49 [2023-02-14 09:30:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:22,320 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 316 transitions. [2023-02-14 09:30:22,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 316 transitions. [2023-02-14 09:30:22,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 09:30:22,321 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:22,321 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-02-14 09:30:22,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 09:30:22,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:22,541 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:22,542 INFO L85 PathProgramCache]: Analyzing trace with hash -319274875, now seen corresponding path program 1 times [2023-02-14 09:30:22,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:22,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328839727] [2023-02-14 09:30:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:22,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:22,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:22,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 09:30:22,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:22,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328839727] [2023-02-14 09:30:22,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328839727] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:22,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713671018] [2023-02-14 09:30:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:22,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:22,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:22,777 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 09:30:22,797 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 09:30:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:22,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-14 09:30:22,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 09:30:23,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 09:30:23,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713671018] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:23,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:23,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 23 [2023-02-14 09:30:23,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529545365] [2023-02-14 09:30:23,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:23,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 09:30:23,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:23,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 09:30:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-02-14 09:30:23,143 INFO L87 Difference]: Start difference. First operand 245 states and 316 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:24,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:24,177 INFO L93 Difference]: Finished difference Result 727 states and 955 transitions. [2023-02-14 09:30:24,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 09:30:24,177 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2023-02-14 09:30:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:24,179 INFO L225 Difference]: With dead ends: 727 [2023-02-14 09:30:24,179 INFO L226 Difference]: Without dead ends: 565 [2023-02-14 09:30:24,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=1655, Unknown=0, NotChecked=0, Total=1980 [2023-02-14 09:30:24,180 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 1071 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:24,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 1564 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 09:30:24,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2023-02-14 09:30:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 273. [2023-02-14 09:30:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 261 states have (on average 1.3026819923371646) internal successors, (340), 262 states have internal predecessors, (340), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 355 transitions. [2023-02-14 09:30:24,245 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 355 transitions. Word has length 51 [2023-02-14 09:30:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:24,245 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 355 transitions. [2023-02-14 09:30:24,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 355 transitions. [2023-02-14 09:30:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 09:30:24,246 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:24,246 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:30:24,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 09:30:24,451 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,SelfDestructingSolverStorable23 [2023-02-14 09:30:24,451 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:24,451 INFO L85 PathProgramCache]: Analyzing trace with hash -175162644, now seen corresponding path program 1 times [2023-02-14 09:30:24,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:24,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007742801] [2023-02-14 09:30:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:24,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:24,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:24,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:24,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-14 09:30:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:24,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-14 09:30:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 09:30:24,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:24,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007742801] [2023-02-14 09:30:24,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007742801] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:24,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339882663] [2023-02-14 09:30:24,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:24,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:24,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:24,566 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 09:30:24,567 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 09:30:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:24,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 09:30:24,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 09:30:24,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 09:30:24,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339882663] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:24,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:24,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-02-14 09:30:24,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351514101] [2023-02-14 09:30:24,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:24,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 09:30:24,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 09:30:24,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-02-14 09:30:24,774 INFO L87 Difference]: Start difference. First operand 273 states and 355 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-14 09:30:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:25,126 INFO L93 Difference]: Finished difference Result 331 states and 427 transitions. [2023-02-14 09:30:25,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 09:30:25,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 54 [2023-02-14 09:30:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:25,128 INFO L225 Difference]: With dead ends: 331 [2023-02-14 09:30:25,128 INFO L226 Difference]: Without dead ends: 281 [2023-02-14 09:30:25,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2023-02-14 09:30:25,129 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 50 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:25,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 677 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 09:30:25,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-02-14 09:30:25,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 271. [2023-02-14 09:30:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 258 states have (on average 1.302325581395349) internal successors, (336), 259 states have internal predecessors, (336), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 09:30:25,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 353 transitions. [2023-02-14 09:30:25,189 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 353 transitions. Word has length 54 [2023-02-14 09:30:25,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:25,189 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 353 transitions. [2023-02-14 09:30:25,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-14 09:30:25,190 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 353 transitions. [2023-02-14 09:30:25,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 09:30:25,190 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:25,190 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2023-02-14 09:30:25,197 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 09:30:25,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:25,395 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:25,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:25,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1379742433, now seen corresponding path program 2 times [2023-02-14 09:30:25,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:25,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550179076] [2023-02-14 09:30:25,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:25,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:26,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:26,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 09:30:26,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:26,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550179076] [2023-02-14 09:30:26,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550179076] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:26,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11287457] [2023-02-14 09:30:26,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 09:30:26,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:26,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:26,017 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 09:30:26,046 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 09:30:26,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 09:30:26,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:30:26,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-14 09:30:26,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:26,181 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 09:30:26,461 INFO L321 Elim1Store]: treesize reduction 38, result has 47.9 percent of original size [2023-02-14 09:30:26,462 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 79 treesize of output 70 [2023-02-14 09:30:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:30:26,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 09:30:26,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11287457] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:26,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:26,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 40 [2023-02-14 09:30:26,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20621327] [2023-02-14 09:30:26,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:26,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-14 09:30:26,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-14 09:30:26,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1377, Unknown=0, NotChecked=0, Total=1560 [2023-02-14 09:30:26,862 INFO L87 Difference]: Start difference. First operand 271 states and 353 transitions. Second operand has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 09:30:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:27,947 INFO L93 Difference]: Finished difference Result 574 states and 769 transitions. [2023-02-14 09:30:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 09:30:27,947 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-14 09:30:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:27,949 INFO L225 Difference]: With dead ends: 574 [2023-02-14 09:30:27,949 INFO L226 Difference]: Without dead ends: 513 [2023-02-14 09:30:27,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=2499, Unknown=0, NotChecked=0, Total=2862 [2023-02-14 09:30:27,950 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 377 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:27,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1640 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 09:30:27,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2023-02-14 09:30:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 310. [2023-02-14 09:30:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 297 states have (on average 1.3097643097643097) internal successors, (389), 298 states have internal predecessors, (389), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 09:30:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 406 transitions. [2023-02-14 09:30:28,015 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 406 transitions. Word has length 52 [2023-02-14 09:30:28,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:28,016 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 406 transitions. [2023-02-14 09:30:28,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 09:30:28,016 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 406 transitions. [2023-02-14 09:30:28,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 09:30:28,017 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:28,017 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1] [2023-02-14 09:30:28,022 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 09:30:28,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:28,222 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:28,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:28,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1170436455, now seen corresponding path program 2 times [2023-02-14 09:30:28,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:28,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809391679] [2023-02-14 09:30:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:28,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:28,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:28,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 09:30:28,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:28,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809391679] [2023-02-14 09:30:28,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809391679] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:28,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744311525] [2023-02-14 09:30:28,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 09:30:28,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:28,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:28,459 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 09:30:28,484 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 09:30:28,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 09:30:28,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:30:28,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 09:30:28,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 09:30:28,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 09:30:28,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744311525] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:28,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:28,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2023-02-14 09:30:28,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89383061] [2023-02-14 09:30:28,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:28,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 09:30:28,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:28,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 09:30:28,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2023-02-14 09:30:28,776 INFO L87 Difference]: Start difference. First operand 310 states and 406 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:29,196 INFO L93 Difference]: Finished difference Result 424 states and 552 transitions. [2023-02-14 09:30:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 09:30:29,196 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2023-02-14 09:30:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:29,197 INFO L225 Difference]: With dead ends: 424 [2023-02-14 09:30:29,197 INFO L226 Difference]: Without dead ends: 329 [2023-02-14 09:30:29,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2023-02-14 09:30:29,198 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 406 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:29,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 965 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 09:30:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-14 09:30:29,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 252. [2023-02-14 09:30:29,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 239 states have (on average 1.292887029288703) internal successors, (309), 240 states have internal predecessors, (309), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 09:30:29,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 326 transitions. [2023-02-14 09:30:29,253 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 326 transitions. Word has length 53 [2023-02-14 09:30:29,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:29,253 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 326 transitions. [2023-02-14 09:30:29,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:29,254 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 326 transitions. [2023-02-14 09:30:29,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 09:30:29,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:29,254 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1] [2023-02-14 09:30:29,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-14 09:30:29,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:29,459 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:29,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:29,459 INFO L85 PathProgramCache]: Analyzing trace with hash -610707989, now seen corresponding path program 3 times [2023-02-14 09:30:29,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:29,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871632942] [2023-02-14 09:30:29,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:29,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:29,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:29,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 09:30:29,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:29,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871632942] [2023-02-14 09:30:29,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871632942] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:29,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241020960] [2023-02-14 09:30:29,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 09:30:29,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:29,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:29,573 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 09:30:29,601 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 09:30:29,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-14 09:30:29,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:30:29,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 09:30:29,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 09:30:29,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 09:30:30,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241020960] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:30,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:30,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-02-14 09:30:30,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986269550] [2023-02-14 09:30:30,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:30,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 09:30:30,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:30,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 09:30:30,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-02-14 09:30:30,106 INFO L87 Difference]: Start difference. First operand 252 states and 326 transitions. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:30,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:30,491 INFO L93 Difference]: Finished difference Result 301 states and 385 transitions. [2023-02-14 09:30:30,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 09:30:30,491 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2023-02-14 09:30:30,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:30,492 INFO L225 Difference]: With dead ends: 301 [2023-02-14 09:30:30,492 INFO L226 Difference]: Without dead ends: 267 [2023-02-14 09:30:30,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2023-02-14 09:30:30,493 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 113 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:30,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 985 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 09:30:30,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-02-14 09:30:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 234. [2023-02-14 09:30:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 221 states have (on average 1.2895927601809956) internal successors, (285), 222 states have internal predecessors, (285), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 09:30:30,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 302 transitions. [2023-02-14 09:30:30,544 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 302 transitions. Word has length 54 [2023-02-14 09:30:30,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:30,544 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 302 transitions. [2023-02-14 09:30:30,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 302 transitions. [2023-02-14 09:30:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 09:30:30,545 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:30,545 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:30:30,550 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 09:30:30,749 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,SelfDestructingSolverStorable27 [2023-02-14 09:30:30,750 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1409986660, now seen corresponding path program 1 times [2023-02-14 09:30:30,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:30,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556016954] [2023-02-14 09:30:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:30,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:30,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:30,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:30,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-14 09:30:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:30,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-14 09:30:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 09:30:30,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:30,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556016954] [2023-02-14 09:30:30,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556016954] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:30,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206616374] [2023-02-14 09:30:30,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:30,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:30,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:30,872 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 09:30:30,874 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 09:30:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:30,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 09:30:30,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 09:30:31,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 09:30:31,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206616374] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:31,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:31,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2023-02-14 09:30:31,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34020602] [2023-02-14 09:30:31,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:31,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 09:30:31,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:31,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 09:30:31,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-02-14 09:30:31,111 INFO L87 Difference]: Start difference. First operand 234 states and 302 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 09:30:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:31,418 INFO L93 Difference]: Finished difference Result 324 states and 415 transitions. [2023-02-14 09:30:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 09:30:31,419 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 57 [2023-02-14 09:30:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:31,419 INFO L225 Difference]: With dead ends: 324 [2023-02-14 09:30:31,420 INFO L226 Difference]: Without dead ends: 258 [2023-02-14 09:30:31,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2023-02-14 09:30:31,420 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 74 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:31,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 600 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 09:30:31,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-02-14 09:30:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 224. [2023-02-14 09:30:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 212 states have (on average 1.2830188679245282) internal successors, (272), 213 states have internal predecessors, (272), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 287 transitions. [2023-02-14 09:30:31,469 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 287 transitions. Word has length 57 [2023-02-14 09:30:31,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:31,469 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 287 transitions. [2023-02-14 09:30:31,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-14 09:30:31,470 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 287 transitions. [2023-02-14 09:30:31,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 09:30:31,470 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:31,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2023-02-14 09:30:31,475 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 09:30:31,675 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,SelfDestructingSolverStorable28 [2023-02-14 09:30:31,675 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:31,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1004480119, now seen corresponding path program 3 times [2023-02-14 09:30:31,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:31,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560204664] [2023-02-14 09:30:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:31,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:31,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:31,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 09:30:31,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:31,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560204664] [2023-02-14 09:30:31,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560204664] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:31,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856211620] [2023-02-14 09:30:31,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 09:30:31,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:31,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:31,929 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 09:30:31,931 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 09:30:32,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 09:30:32,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:30:32,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 09:30:32,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 09:30:32,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 09:30:32,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856211620] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:32,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:32,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2023-02-14 09:30:32,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36404699] [2023-02-14 09:30:32,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:32,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 09:30:32,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 09:30:32,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2023-02-14 09:30:32,298 INFO L87 Difference]: Start difference. First operand 224 states and 287 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:34,949 INFO L93 Difference]: Finished difference Result 1047 states and 1365 transitions. [2023-02-14 09:30:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-14 09:30:34,950 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2023-02-14 09:30:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:34,952 INFO L225 Difference]: With dead ends: 1047 [2023-02-14 09:30:34,952 INFO L226 Difference]: Without dead ends: 890 [2023-02-14 09:30:34,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1157, Invalid=7399, Unknown=0, NotChecked=0, Total=8556 [2023-02-14 09:30:34,954 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1843 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1843 SdHoareTripleChecker+Valid, 2802 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:34,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1843 Valid, 2802 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 09:30:34,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2023-02-14 09:30:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 209. [2023-02-14 09:30:35,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 197 states have (on average 1.284263959390863) internal successors, (253), 198 states have internal predecessors, (253), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 09:30:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 268 transitions. [2023-02-14 09:30:35,010 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 268 transitions. Word has length 55 [2023-02-14 09:30:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:35,010 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 268 transitions. [2023-02-14 09:30:35,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:35,010 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 268 transitions. [2023-02-14 09:30:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-14 09:30:35,011 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:35,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:30:35,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-14 09:30:35,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:35,216 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:35,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:35,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1373602884, now seen corresponding path program 1 times [2023-02-14 09:30:35,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:35,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729864490] [2023-02-14 09:30:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:35,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:35,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:35,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:35,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-14 09:30:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:35,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-14 09:30:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 09:30:35,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:35,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729864490] [2023-02-14 09:30:35,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729864490] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:35,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713351524] [2023-02-14 09:30:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:35,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:35,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:35,692 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:30:35,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-14 09:30:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:35,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 09:30:35,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 09:30:35,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 09:30:36,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713351524] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:36,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:36,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 8] total 31 [2023-02-14 09:30:36,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399572527] [2023-02-14 09:30:36,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:36,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 09:30:36,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:36,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 09:30:36,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2023-02-14 09:30:36,175 INFO L87 Difference]: Start difference. First operand 209 states and 268 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-14 09:30:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:38,538 INFO L93 Difference]: Finished difference Result 418 states and 535 transitions. [2023-02-14 09:30:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-14 09:30:38,538 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2023-02-14 09:30:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:38,539 INFO L225 Difference]: With dead ends: 418 [2023-02-14 09:30:38,539 INFO L226 Difference]: Without dead ends: 311 [2023-02-14 09:30:38,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=949, Invalid=4453, Unknown=0, NotChecked=0, Total=5402 [2023-02-14 09:30:38,541 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 785 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:38,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 850 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 09:30:38,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-02-14 09:30:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 229. [2023-02-14 09:30:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 214 states have (on average 1.2523364485981308) internal successors, (268), 215 states have internal predecessors, (268), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 09:30:38,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 289 transitions. [2023-02-14 09:30:38,613 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 289 transitions. Word has length 59 [2023-02-14 09:30:38,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:38,613 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 289 transitions. [2023-02-14 09:30:38,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-14 09:30:38,617 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 289 transitions. [2023-02-14 09:30:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-14 09:30:38,617 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:38,617 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2023-02-14 09:30:38,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-14 09:30:38,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:38,822 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:38,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1737992177, now seen corresponding path program 4 times [2023-02-14 09:30:38,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:38,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678403216] [2023-02-14 09:30:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:38,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:39,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:39,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 09:30:39,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:39,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678403216] [2023-02-14 09:30:39,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678403216] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:39,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223382093] [2023-02-14 09:30:39,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 09:30:39,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:39,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:39,646 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:30:39,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-14 09:30:39,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 09:30:39,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:30:39,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-14 09:30:39,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:40,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 09:30:40,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 09:30:40,106 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 09:30:40,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 09:30:40,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 39 [2023-02-14 09:30:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 09:30:40,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:40,559 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2023-02-14 09:30:40,560 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 39 treesize of output 93 [2023-02-14 09:30:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 09:30:41,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223382093] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:30:41,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:30:41,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 18] total 40 [2023-02-14 09:30:41,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367459171] [2023-02-14 09:30:41,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:30:41,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-14 09:30:41,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:30:41,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-14 09:30:41,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2023-02-14 09:30:41,123 INFO L87 Difference]: Start difference. First operand 229 states and 289 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:42,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:30:42,747 INFO L93 Difference]: Finished difference Result 436 states and 558 transitions. [2023-02-14 09:30:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-14 09:30:42,747 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-02-14 09:30:42,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:30:42,748 INFO L225 Difference]: With dead ends: 436 [2023-02-14 09:30:42,748 INFO L226 Difference]: Without dead ends: 412 [2023-02-14 09:30:42,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=399, Invalid=3023, Unknown=0, NotChecked=0, Total=3422 [2023-02-14 09:30:42,750 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 596 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1828 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 09:30:42,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 1828 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 09:30:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-14 09:30:42,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 241. [2023-02-14 09:30:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 226 states have (on average 1.252212389380531) internal successors, (283), 227 states have internal predecessors, (283), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 09:30:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 304 transitions. [2023-02-14 09:30:42,838 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 304 transitions. Word has length 58 [2023-02-14 09:30:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:30:42,838 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 304 transitions. [2023-02-14 09:30:42,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:30:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 304 transitions. [2023-02-14 09:30:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-14 09:30:42,839 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:30:42,839 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2023-02-14 09:30:42,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-14 09:30:43,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:43,044 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:30:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:30:43,044 INFO L85 PathProgramCache]: Analyzing trace with hash 162150685, now seen corresponding path program 5 times [2023-02-14 09:30:43,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:30:43,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376764314] [2023-02-14 09:30:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:30:43,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:30:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:43,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:30:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:43,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:30:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:30:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 09:30:43,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:30:43,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376764314] [2023-02-14 09:30:43,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376764314] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:30:43,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708857705] [2023-02-14 09:30:43,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 09:30:43,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:30:43,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:30:43,855 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:30:43,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-14 09:30:44,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-14 09:30:44,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:30:44,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 93 conjunts are in the unsatisfiable core [2023-02-14 09:30:44,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:30:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 09:30:45,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:30:46,936 INFO L321 Elim1Store]: treesize reduction 73, result has 86.7 percent of original size [2023-02-14 09:30:46,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 496 [2023-02-14 09:31:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 09:31:38,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708857705] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:31:38,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:31:38,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 25] total 56 [2023-02-14 09:31:38,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811678815] [2023-02-14 09:31:38,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:31:38,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-14 09:31:38,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:31:38,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-14 09:31:38,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2676, Unknown=0, NotChecked=0, Total=3080 [2023-02-14 09:31:38,784 INFO L87 Difference]: Start difference. First operand 241 states and 304 transitions. Second operand has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 55 states have internal predecessors, (107), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:31:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:31:45,584 INFO L93 Difference]: Finished difference Result 611 states and 786 transitions. [2023-02-14 09:31:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-14 09:31:45,584 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 55 states have internal predecessors, (107), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-02-14 09:31:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:31:45,586 INFO L225 Difference]: With dead ends: 611 [2023-02-14 09:31:45,586 INFO L226 Difference]: Without dead ends: 504 [2023-02-14 09:31:45,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3971 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2000, Invalid=12520, Unknown=0, NotChecked=0, Total=14520 [2023-02-14 09:31:45,588 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 813 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 2504 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-14 09:31:45,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [821 Valid, 1850 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2504 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-14 09:31:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-02-14 09:31:45,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 261. [2023-02-14 09:31:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 246 states have (on average 1.2520325203252032) internal successors, (308), 247 states have internal predecessors, (308), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 09:31:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 329 transitions. [2023-02-14 09:31:45,673 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 329 transitions. Word has length 58 [2023-02-14 09:31:45,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:31:45,673 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 329 transitions. [2023-02-14 09:31:45,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 55 states have internal predecessors, (107), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:31:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 329 transitions. [2023-02-14 09:31:45,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-14 09:31:45,674 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:31:45,674 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2023-02-14 09:31:45,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-14 09:31:45,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-14 09:31:45,880 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:31:45,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:31:45,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1550031143, now seen corresponding path program 6 times [2023-02-14 09:31:45,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:31:45,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810335308] [2023-02-14 09:31:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:31:45,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:31:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:46,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:31:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:46,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:31:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 09:31:46,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:31:46,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810335308] [2023-02-14 09:31:46,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810335308] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:31:46,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723689840] [2023-02-14 09:31:46,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 09:31:46,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:31:46,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:31:46,635 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:31:46,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-14 09:31:46,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-14 09:31:46,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:31:46,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-14 09:31:46,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:31:47,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 09:31:47,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 09:31:47,195 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 09:31:47,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 09:31:47,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 39 [2023-02-14 09:31:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 09:31:47,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:31:47,635 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2023-02-14 09:31:47,636 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 39 treesize of output 93 [2023-02-14 09:31:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 09:31:48,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723689840] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:31:48,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:31:48,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 41 [2023-02-14 09:31:48,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009081150] [2023-02-14 09:31:48,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:31:48,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-14 09:31:48,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:31:48,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-14 09:31:48,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 09:31:48,163 INFO L87 Difference]: Start difference. First operand 261 states and 329 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 09:31:50,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:31:50,339 INFO L93 Difference]: Finished difference Result 469 states and 598 transitions. [2023-02-14 09:31:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-14 09:31:50,340 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2023-02-14 09:31:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:31:50,341 INFO L225 Difference]: With dead ends: 469 [2023-02-14 09:31:50,341 INFO L226 Difference]: Without dead ends: 443 [2023-02-14 09:31:50,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=514, Invalid=3908, Unknown=0, NotChecked=0, Total=4422 [2023-02-14 09:31:50,342 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 446 mSDsluCounter, 1997 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 2095 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 09:31:50,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 2095 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1918 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 09:31:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-02-14 09:31:50,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 254. [2023-02-14 09:31:50,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.2510460251046025) internal successors, (299), 240 states have internal predecessors, (299), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 09:31:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 320 transitions. [2023-02-14 09:31:50,428 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 320 transitions. Word has length 58 [2023-02-14 09:31:50,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:31:50,428 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 320 transitions. [2023-02-14 09:31:50,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 09:31:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 320 transitions. [2023-02-14 09:31:50,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-14 09:31:50,431 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:31:50,431 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:31:50,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-14 09:31:50,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-02-14 09:31:50,637 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:31:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:31:50,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1948639156, now seen corresponding path program 2 times [2023-02-14 09:31:50,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:31:50,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667651776] [2023-02-14 09:31:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:31:50,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:31:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:51,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:31:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:51,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:31:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:51,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 09:31:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:51,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-02-14 09:31:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 09:31:51,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:31:51,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667651776] [2023-02-14 09:31:51,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667651776] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:31:51,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839610638] [2023-02-14 09:31:51,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 09:31:51,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:31:51,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:31:51,069 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:31:51,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-14 09:31:51,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 09:31:51,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:31:51,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-14 09:31:51,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:31:51,299 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-14 09:31:51,300 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 34 treesize of output 10 [2023-02-14 09:31:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 09:31:51,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:31:51,439 INFO L321 Elim1Store]: treesize reduction 19, result has 80.0 percent of original size [2023-02-14 09:31:51,440 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 35 treesize of output 83 [2023-02-14 09:31:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 09:31:51,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839610638] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:31:51,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:31:51,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 23 [2023-02-14 09:31:51,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874310481] [2023-02-14 09:31:51,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:31:51,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 09:31:51,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:31:51,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 09:31:51,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2023-02-14 09:31:51,597 INFO L87 Difference]: Start difference. First operand 254 states and 320 transitions. Second operand has 23 states, 20 states have (on average 4.05) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-14 09:31:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:31:52,081 INFO L93 Difference]: Finished difference Result 407 states and 517 transitions. [2023-02-14 09:31:52,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 09:31:52,081 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 4.05) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 62 [2023-02-14 09:31:52,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:31:52,082 INFO L225 Difference]: With dead ends: 407 [2023-02-14 09:31:52,082 INFO L226 Difference]: Without dead ends: 343 [2023-02-14 09:31:52,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2023-02-14 09:31:52,083 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 153 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 09:31:52,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 785 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 09:31:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-02-14 09:31:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 258. [2023-02-14 09:31:52,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 242 states have (on average 1.2396694214876034) internal successors, (300), 243 states have internal predecessors, (300), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 09:31:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 323 transitions. [2023-02-14 09:31:52,171 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 323 transitions. Word has length 62 [2023-02-14 09:31:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:31:52,171 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 323 transitions. [2023-02-14 09:31:52,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 4.05) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-14 09:31:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 323 transitions. [2023-02-14 09:31:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-14 09:31:52,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:31:52,173 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 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] [2023-02-14 09:31:52,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-14 09:31:52,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-14 09:31:52,378 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:31:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:31:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash -158527231, now seen corresponding path program 2 times [2023-02-14 09:31:52,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:31:52,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242850877] [2023-02-14 09:31:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:31:52,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:31:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:52,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:31:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:52,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:31:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-14 09:31:52,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:31:52,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242850877] [2023-02-14 09:31:52,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242850877] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:31:52,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905646593] [2023-02-14 09:31:52,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 09:31:52,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:31:52,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:31:52,553 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:31:52,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-14 09:31:52,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 09:31:52,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:31:52,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 09:31:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:31:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 09:31:52,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:31:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 09:31:53,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905646593] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:31:53,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:31:53,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2023-02-14 09:31:53,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919861187] [2023-02-14 09:31:53,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:31:53,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 09:31:53,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:31:53,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 09:31:53,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2023-02-14 09:31:53,138 INFO L87 Difference]: Start difference. First operand 258 states and 323 transitions. Second operand has 31 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:31:55,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:31:55,767 INFO L93 Difference]: Finished difference Result 815 states and 1047 transitions. [2023-02-14 09:31:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-02-14 09:31:55,767 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2023-02-14 09:31:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:31:55,769 INFO L225 Difference]: With dead ends: 815 [2023-02-14 09:31:55,769 INFO L226 Difference]: Without dead ends: 608 [2023-02-14 09:31:55,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=949, Invalid=7423, Unknown=0, NotChecked=0, Total=8372 [2023-02-14 09:31:55,770 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 492 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 09:31:55,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 2037 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 09:31:55,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2023-02-14 09:31:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 485. [2023-02-14 09:31:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 469 states have (on average 1.2537313432835822) internal successors, (588), 470 states have internal predecessors, (588), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 09:31:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 611 transitions. [2023-02-14 09:31:55,923 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 611 transitions. Word has length 60 [2023-02-14 09:31:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:31:55,923 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 611 transitions. [2023-02-14 09:31:55,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:31:55,924 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 611 transitions. [2023-02-14 09:31:55,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-14 09:31:55,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:31:55,925 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:31:55,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-14 09:31:56,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:31:56,130 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:31:56,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:31:56,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1380776590, now seen corresponding path program 1 times [2023-02-14 09:31:56,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:31:56,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716402104] [2023-02-14 09:31:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:31:56,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:31:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:56,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:31:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:56,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:31:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:56,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-14 09:31:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:56,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-02-14 09:31:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 09:31:56,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:31:56,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716402104] [2023-02-14 09:31:56,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716402104] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:31:56,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640927540] [2023-02-14 09:31:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:31:56,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:31:56,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:31:56,634 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:31:56,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-14 09:31:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:31:56,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-14 09:31:56,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:31:57,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 09:31:57,157 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 1 case distinctions, treesize of input 38 treesize of output 10 [2023-02-14 09:31:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 09:31:57,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:31:57,389 INFO L321 Elim1Store]: treesize reduction 19, result has 81.0 percent of original size [2023-02-14 09:31:57,389 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 37 treesize of output 88 [2023-02-14 09:31:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 09:31:57,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640927540] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:31:57,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:31:57,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 16] total 39 [2023-02-14 09:31:57,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812587091] [2023-02-14 09:31:57,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:31:57,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-14 09:31:57,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:31:57,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-14 09:31:57,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2023-02-14 09:31:57,774 INFO L87 Difference]: Start difference. First operand 485 states and 611 transitions. Second operand has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 7 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-14 09:31:59,799 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 09:32:01,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 09:32:03,871 WARN L539 Checker$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 09:32:05,877 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 09:32:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:32:07,322 INFO L93 Difference]: Finished difference Result 703 states and 892 transitions. [2023-02-14 09:32:07,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 09:32:07,324 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 7 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 63 [2023-02-14 09:32:07,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:32:07,326 INFO L225 Difference]: With dead ends: 703 [2023-02-14 09:32:07,326 INFO L226 Difference]: Without dead ends: 701 [2023-02-14 09:32:07,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=343, Invalid=2413, Unknown=0, NotChecked=0, Total=2756 [2023-02-14 09:32:07,327 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 435 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 83 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-02-14 09:32:07,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 927 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1350 Invalid, 4 Unknown, 0 Unchecked, 8.8s Time] [2023-02-14 09:32:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2023-02-14 09:32:07,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 619. [2023-02-14 09:32:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 590 states have (on average 1.259322033898305) internal successors, (743), 594 states have internal predecessors, (743), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-14 09:32:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 783 transitions. [2023-02-14 09:32:07,662 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 783 transitions. Word has length 63 [2023-02-14 09:32:07,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:32:07,662 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 783 transitions. [2023-02-14 09:32:07,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 7 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-14 09:32:07,663 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 783 transitions. [2023-02-14 09:32:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-14 09:32:07,664 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:32:07,664 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2023-02-14 09:32:07,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-14 09:32:07,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-14 09:32:07,868 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:32:07,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:32:07,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2005256085, now seen corresponding path program 7 times [2023-02-14 09:32:07,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:32:07,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011560399] [2023-02-14 09:32:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:32:07,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:32:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:08,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:32:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:08,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:32:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 09:32:08,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:32:08,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011560399] [2023-02-14 09:32:08,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011560399] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:32:08,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325877553] [2023-02-14 09:32:08,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 09:32:08,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:32:08,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:32:08,113 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:32:08,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-14 09:32:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:08,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-14 09:32:08,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:32:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 09:32:08,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:32:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 09:32:08,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325877553] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:32:08,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:32:08,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 12] total 28 [2023-02-14 09:32:08,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958507655] [2023-02-14 09:32:08,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:32:08,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 09:32:08,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:32:08,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 09:32:08,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-02-14 09:32:08,539 INFO L87 Difference]: Start difference. First operand 619 states and 783 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:32:09,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:32:09,968 INFO L93 Difference]: Finished difference Result 1685 states and 2170 transitions. [2023-02-14 09:32:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 09:32:09,969 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 61 [2023-02-14 09:32:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:32:09,973 INFO L225 Difference]: With dead ends: 1685 [2023-02-14 09:32:09,973 INFO L226 Difference]: Without dead ends: 1263 [2023-02-14 09:32:09,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2023-02-14 09:32:09,974 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 1062 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 1651 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 09:32:09,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 1651 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 09:32:09,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2023-02-14 09:32:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 703. [2023-02-14 09:32:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 674 states have (on average 1.268545994065282) internal successors, (855), 678 states have internal predecessors, (855), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-14 09:32:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 895 transitions. [2023-02-14 09:32:10,220 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 895 transitions. Word has length 61 [2023-02-14 09:32:10,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:32:10,220 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 895 transitions. [2023-02-14 09:32:10,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:32:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 895 transitions. [2023-02-14 09:32:10,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-14 09:32:10,222 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:32:10,222 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2023-02-14 09:32:10,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-14 09:32:10,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-14 09:32:10,427 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:32:10,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:32:10,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1579304483, now seen corresponding path program 3 times [2023-02-14 09:32:10,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:32:10,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577271875] [2023-02-14 09:32:10,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:32:10,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:32:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:11,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:32:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:11,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:32:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 09:32:11,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:32:11,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577271875] [2023-02-14 09:32:11,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577271875] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:32:11,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251436926] [2023-02-14 09:32:11,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 09:32:11,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:32:11,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:32:11,195 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:32:11,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-14 09:32:11,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 09:32:11,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:32:11,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-14 09:32:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:32:11,501 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 09:32:11,816 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-02-14 09:32:11,816 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 20 [2023-02-14 09:32:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-14 09:32:11,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:32:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-14 09:32:12,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251436926] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:32:12,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:32:12,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 13] total 45 [2023-02-14 09:32:12,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666432665] [2023-02-14 09:32:12,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:32:12,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-14 09:32:12,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:32:12,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-14 09:32:12,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1765, Unknown=0, NotChecked=0, Total=1980 [2023-02-14 09:32:12,256 INFO L87 Difference]: Start difference. First operand 703 states and 895 transitions. Second operand has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 09:32:14,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:32:14,602 INFO L93 Difference]: Finished difference Result 1049 states and 1355 transitions. [2023-02-14 09:32:14,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-14 09:32:14,603 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2023-02-14 09:32:14,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:32:14,605 INFO L225 Difference]: With dead ends: 1049 [2023-02-14 09:32:14,605 INFO L226 Difference]: Without dead ends: 953 [2023-02-14 09:32:14,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=708, Invalid=5298, Unknown=0, NotChecked=0, Total=6006 [2023-02-14 09:32:14,606 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 651 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 2530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:32:14,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1752 Invalid, 2530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 09:32:14,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2023-02-14 09:32:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 761. [2023-02-14 09:32:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 732 states have (on average 1.2745901639344261) internal successors, (933), 736 states have internal predecessors, (933), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-14 09:32:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 973 transitions. [2023-02-14 09:32:14,870 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 973 transitions. Word has length 62 [2023-02-14 09:32:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:32:14,870 INFO L495 AbstractCegarLoop]: Abstraction has 761 states and 973 transitions. [2023-02-14 09:32:14,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 09:32:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 973 transitions. [2023-02-14 09:32:14,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-14 09:32:14,872 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:32:14,872 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1] [2023-02-14 09:32:14,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-14 09:32:15,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-14 09:32:15,077 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:32:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:32:15,078 INFO L85 PathProgramCache]: Analyzing trace with hash -892086793, now seen corresponding path program 8 times [2023-02-14 09:32:15,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:32:15,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880000291] [2023-02-14 09:32:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:32:15,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:32:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:15,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:32:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:15,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:32:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 09:32:15,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:32:15,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880000291] [2023-02-14 09:32:15,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880000291] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:32:15,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333056739] [2023-02-14 09:32:15,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 09:32:15,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:32:15,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:32:15,650 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:32:15,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-14 09:32:15,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 09:32:15,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:32:15,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 09:32:15,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:32:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 09:32:15,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:32:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-14 09:32:16,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333056739] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:32:16,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:32:16,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 39 [2023-02-14 09:32:16,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18866278] [2023-02-14 09:32:16,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:32:16,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-14 09:32:16,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:32:16,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-14 09:32:16,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2023-02-14 09:32:16,196 INFO L87 Difference]: Start difference. First operand 761 states and 973 transitions. Second operand has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:32:29,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:32:29,950 INFO L93 Difference]: Finished difference Result 3577 states and 4673 transitions. [2023-02-14 09:32:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-02-14 09:32:29,951 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2023-02-14 09:32:29,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:32:29,959 INFO L225 Difference]: With dead ends: 3577 [2023-02-14 09:32:29,960 INFO L226 Difference]: Without dead ends: 3386 [2023-02-14 09:32:29,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10041 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=2804, Invalid=27646, Unknown=0, NotChecked=0, Total=30450 [2023-02-14 09:32:29,962 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 3491 mSDsluCounter, 5617 mSDsCounter, 0 mSdLazyCounter, 4642 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 5923 SdHoareTripleChecker+Invalid, 5265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 4642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-14 09:32:29,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 5923 Invalid, 5265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 4642 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-02-14 09:32:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2023-02-14 09:32:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 673. [2023-02-14 09:32:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 644 states have (on average 1.2826086956521738) internal successors, (826), 648 states have internal predecessors, (826), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-14 09:32:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 866 transitions. [2023-02-14 09:32:30,304 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 866 transitions. Word has length 63 [2023-02-14 09:32:30,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:32:30,304 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 866 transitions. [2023-02-14 09:32:30,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:32:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 866 transitions. [2023-02-14 09:32:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-14 09:32:30,305 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:32:30,305 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 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] [2023-02-14 09:32:30,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-14 09:32:30,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-14 09:32:30,511 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:32:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:32:30,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2033592005, now seen corresponding path program 3 times [2023-02-14 09:32:30,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:32:30,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483304340] [2023-02-14 09:32:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:32:30,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:32:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:30,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:32:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:30,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:32:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-14 09:32:30,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:32:30,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483304340] [2023-02-14 09:32:30,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483304340] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:32:30,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790219258] [2023-02-14 09:32:30,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 09:32:30,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:32:30,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:32:30,674 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:32:30,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-14 09:32:30,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 09:32:30,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:32:30,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 09:32:30,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:32:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-14 09:32:31,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:32:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-14 09:32:31,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790219258] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:32:31,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:32:31,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-02-14 09:32:31,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120757817] [2023-02-14 09:32:31,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:32:31,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 09:32:31,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:32:31,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 09:32:31,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2023-02-14 09:32:31,495 INFO L87 Difference]: Start difference. First operand 673 states and 866 transitions. Second operand has 31 states, 30 states have (on average 3.4) internal successors, (102), 30 states have internal predecessors, (102), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 09:32:34,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:32:34,092 INFO L93 Difference]: Finished difference Result 863 states and 1110 transitions. [2023-02-14 09:32:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-14 09:32:34,092 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.4) internal successors, (102), 30 states have internal predecessors, (102), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2023-02-14 09:32:34,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:32:34,094 INFO L225 Difference]: With dead ends: 863 [2023-02-14 09:32:34,095 INFO L226 Difference]: Without dead ends: 807 [2023-02-14 09:32:34,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=717, Invalid=4833, Unknown=0, NotChecked=0, Total=5550 [2023-02-14 09:32:34,096 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1185 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 09:32:34,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 1100 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 09:32:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2023-02-14 09:32:34,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 687. [2023-02-14 09:32:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 658 states have (on average 1.2826747720364742) internal successors, (844), 662 states have internal predecessors, (844), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-14 09:32:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 884 transitions. [2023-02-14 09:32:34,417 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 884 transitions. Word has length 67 [2023-02-14 09:32:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:32:34,417 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 884 transitions. [2023-02-14 09:32:34,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.4) internal successors, (102), 30 states have internal predecessors, (102), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 09:32:34,418 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 884 transitions. [2023-02-14 09:32:34,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-14 09:32:34,419 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:32:34,419 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1] [2023-02-14 09:32:34,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-14 09:32:34,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-02-14 09:32:34,624 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:32:34,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:32:34,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1736078367, now seen corresponding path program 9 times [2023-02-14 09:32:34,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:32:34,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312331164] [2023-02-14 09:32:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:32:34,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:32:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:35,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:32:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:35,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:32:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 09:32:35,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:32:35,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312331164] [2023-02-14 09:32:35,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312331164] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:32:35,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772058972] [2023-02-14 09:32:35,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 09:32:35,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:32:35,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:32:35,475 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:32:35,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-14 09:32:37,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-14 09:32:37,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:32:37,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-14 09:32:37,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:32:38,706 INFO L321 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2023-02-14 09:32:38,706 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 83 treesize of output 74 [2023-02-14 09:32:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 09:32:38,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:32:39,668 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2023-02-14 09:32:39,669 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 39 treesize of output 93 [2023-02-14 09:32:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 09:32:40,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772058972] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:32:40,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:32:40,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 22] total 68 [2023-02-14 09:32:40,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353993239] [2023-02-14 09:32:40,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:32:40,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-14 09:32:40,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:32:40,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-14 09:32:40,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=4226, Unknown=0, NotChecked=0, Total=4556 [2023-02-14 09:32:40,420 INFO L87 Difference]: Start difference. First operand 687 states and 884 transitions. Second operand has 68 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 states have internal predecessors, (146), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 09:32:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:32:52,797 INFO L93 Difference]: Finished difference Result 2542 states and 3322 transitions. [2023-02-14 09:32:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-02-14 09:32:52,797 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 states have internal predecessors, (146), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2023-02-14 09:32:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:32:52,804 INFO L225 Difference]: With dead ends: 2542 [2023-02-14 09:32:52,805 INFO L226 Difference]: Without dead ends: 2484 [2023-02-14 09:32:52,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7386 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2222, Invalid=24510, Unknown=0, NotChecked=0, Total=26732 [2023-02-14 09:32:52,833 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 2138 mSDsluCounter, 5707 mSDsCounter, 0 mSdLazyCounter, 8829 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2138 SdHoareTripleChecker+Valid, 5922 SdHoareTripleChecker+Invalid, 9299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 8829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-02-14 09:32:52,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2138 Valid, 5922 Invalid, 9299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 8829 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-02-14 09:32:52,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2023-02-14 09:32:53,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 711. [2023-02-14 09:32:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 682 states have (on average 1.281524926686217) internal successors, (874), 686 states have internal predecessors, (874), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-14 09:32:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 914 transitions. [2023-02-14 09:32:53,237 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 914 transitions. Word has length 68 [2023-02-14 09:32:53,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:32:53,237 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 914 transitions. [2023-02-14 09:32:53,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 states have internal predecessors, (146), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 09:32:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 914 transitions. [2023-02-14 09:32:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-14 09:32:53,239 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:32:53,239 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1] [2023-02-14 09:32:53,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-14 09:32:53,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:32:53,445 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:32:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:32:53,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1104262353, now seen corresponding path program 10 times [2023-02-14 09:32:53,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:32:53,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726242859] [2023-02-14 09:32:53,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:32:53,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:32:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:54,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:32:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:54,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:32:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:32:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 09:32:54,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:32:54,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726242859] [2023-02-14 09:32:54,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726242859] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:32:54,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55861191] [2023-02-14 09:32:54,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 09:32:54,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:32:54,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:32:54,322 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:32:54,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-14 09:32:54,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 09:32:54,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:32:54,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-14 09:32:54,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:32:55,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 09:32:55,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 09:32:55,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 09:32:55,198 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 09:32:55,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 09:32:55,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 31 [2023-02-14 09:32:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 09:32:55,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:32:55,579 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2023-02-14 09:32:55,579 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 39 treesize of output 93 [2023-02-14 09:32:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 09:32:56,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55861191] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:32:56,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:32:56,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 17] total 52 [2023-02-14 09:32:56,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235192699] [2023-02-14 09:32:56,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:32:56,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-14 09:32:56,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:32:56,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-14 09:32:56,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2429, Unknown=0, NotChecked=0, Total=2652 [2023-02-14 09:32:56,341 INFO L87 Difference]: Start difference. First operand 711 states and 914 transitions. Second operand has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 51 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 09:32:59,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:32:59,355 INFO L93 Difference]: Finished difference Result 1222 states and 1586 transitions. [2023-02-14 09:32:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-14 09:32:59,360 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 51 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2023-02-14 09:32:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:32:59,362 INFO L225 Difference]: With dead ends: 1222 [2023-02-14 09:32:59,362 INFO L226 Difference]: Without dead ends: 1060 [2023-02-14 09:32:59,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 104 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=568, Invalid=5132, Unknown=0, NotChecked=0, Total=5700 [2023-02-14 09:32:59,363 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 598 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 3235 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 2221 SdHoareTripleChecker+Invalid, 3330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 3235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-14 09:32:59,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 2221 Invalid, 3330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 3235 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-14 09:32:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2023-02-14 09:32:59,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 741. [2023-02-14 09:32:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 712 states have (on average 1.2808988764044944) internal successors, (912), 716 states have internal predecessors, (912), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-14 09:32:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 952 transitions. [2023-02-14 09:32:59,754 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 952 transitions. Word has length 68 [2023-02-14 09:32:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:32:59,754 INFO L495 AbstractCegarLoop]: Abstraction has 741 states and 952 transitions. [2023-02-14 09:32:59,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 51 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 09:32:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 952 transitions. [2023-02-14 09:32:59,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-14 09:32:59,756 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:32:59,756 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1] [2023-02-14 09:32:59,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-02-14 09:32:59,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-02-14 09:32:59,961 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:32:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:32:59,962 INFO L85 PathProgramCache]: Analyzing trace with hash -797080539, now seen corresponding path program 11 times [2023-02-14 09:32:59,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:32:59,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858728946] [2023-02-14 09:32:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:32:59,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:32:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:00,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:33:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:00,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:33:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 09:33:00,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:33:00,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858728946] [2023-02-14 09:33:00,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858728946] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:33:00,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178185048] [2023-02-14 09:33:00,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 09:33:00,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:33:00,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:33:00,800 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:33:00,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-14 09:33:03,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-14 09:33:03,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:33:03,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 103 conjunts are in the unsatisfiable core [2023-02-14 09:33:03,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:33:04,150 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 15 treesize of output 11 [2023-02-14 09:33:04,188 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 15 treesize of output 11 [2023-02-14 09:33:04,226 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 09:33:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 09:33:04,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:33:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 09:33:08,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178185048] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:33:08,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:33:08,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 24] total 68 [2023-02-14 09:33:08,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741599882] [2023-02-14 09:33:08,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:33:08,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-14 09:33:08,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:33:08,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-14 09:33:08,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=4035, Unknown=0, NotChecked=0, Total=4556 [2023-02-14 09:33:08,315 INFO L87 Difference]: Start difference. First operand 741 states and 952 transitions. Second operand has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 66 states have internal predecessors, (144), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 09:33:50,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:33:50,149 INFO L93 Difference]: Finished difference Result 2456 states and 3209 transitions. [2023-02-14 09:33:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-02-14 09:33:50,150 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 66 states have internal predecessors, (144), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2023-02-14 09:33:50,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:33:50,155 INFO L225 Difference]: With dead ends: 2456 [2023-02-14 09:33:50,155 INFO L226 Difference]: Without dead ends: 2279 [2023-02-14 09:33:50,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9589 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=3395, Invalid=27756, Unknown=1, NotChecked=0, Total=31152 [2023-02-14 09:33:50,157 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1932 mSDsluCounter, 3137 mSDsCounter, 0 mSdLazyCounter, 7547 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1944 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 7991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 7547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2023-02-14 09:33:50,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1944 Valid, 3287 Invalid, 7991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 7547 Invalid, 0 Unknown, 0 Unchecked, 17.1s Time] [2023-02-14 09:33:50,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2023-02-14 09:33:50,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 797. [2023-02-14 09:33:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 768 states have (on average 1.2864583333333333) internal successors, (988), 772 states have internal predecessors, (988), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-14 09:33:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1028 transitions. [2023-02-14 09:33:50,584 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1028 transitions. Word has length 68 [2023-02-14 09:33:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:33:50,585 INFO L495 AbstractCegarLoop]: Abstraction has 797 states and 1028 transitions. [2023-02-14 09:33:50,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 66 states have internal predecessors, (144), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 09:33:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1028 transitions. [2023-02-14 09:33:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-14 09:33:50,586 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:33:50,586 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1] [2023-02-14 09:33:50,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-02-14 09:33:50,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:33:50,792 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:33:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:33:50,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1785704929, now seen corresponding path program 12 times [2023-02-14 09:33:50,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:33:50,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429030627] [2023-02-14 09:33:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:33:50,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:33:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:51,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:33:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:51,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:33:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 09:33:51,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:33:51,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429030627] [2023-02-14 09:33:51,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429030627] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:33:51,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893851109] [2023-02-14 09:33:51,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 09:33:51,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:33:51,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:33:51,641 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:33:51,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-14 09:33:51,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-14 09:33:51,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:33:51,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-14 09:33:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:33:52,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 09:33:52,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 09:33:52,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 09:33:52,391 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 09:33:52,392 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 09:33:52,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 31 [2023-02-14 09:33:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 09:33:52,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:33:52,724 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2023-02-14 09:33:52,724 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 39 treesize of output 93 [2023-02-14 09:33:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 09:33:53,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893851109] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:33:53,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:33:53,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26, 16] total 44 [2023-02-14 09:33:53,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642536201] [2023-02-14 09:33:53,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:33:53,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-14 09:33:53,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:33:53,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-14 09:33:53,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1730, Unknown=0, NotChecked=0, Total=1892 [2023-02-14 09:33:53,274 INFO L87 Difference]: Start difference. First operand 797 states and 1028 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 09:33:55,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:33:55,925 INFO L93 Difference]: Finished difference Result 1275 states and 1664 transitions. [2023-02-14 09:33:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 09:33:55,926 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2023-02-14 09:33:55,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:33:55,929 INFO L225 Difference]: With dead ends: 1275 [2023-02-14 09:33:55,929 INFO L226 Difference]: Without dead ends: 1217 [2023-02-14 09:33:55,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 110 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=455, Invalid=4101, Unknown=0, NotChecked=0, Total=4556 [2023-02-14 09:33:55,930 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 468 mSDsluCounter, 1837 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:33:55,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 1928 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 09:33:55,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2023-02-14 09:33:56,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 793. [2023-02-14 09:33:56,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 764 states have (on average 1.287958115183246) internal successors, (984), 768 states have internal predecessors, (984), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-14 09:33:56,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1024 transitions. [2023-02-14 09:33:56,371 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1024 transitions. Word has length 68 [2023-02-14 09:33:56,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:33:56,371 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1024 transitions. [2023-02-14 09:33:56,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 09:33:56,372 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1024 transitions. [2023-02-14 09:33:56,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-14 09:33:56,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:33:56,389 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:33:56,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-02-14 09:33:56,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-14 09:33:56,592 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:33:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:33:56,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1009014033, now seen corresponding path program 2 times [2023-02-14 09:33:56,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:33:56,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60459586] [2023-02-14 09:33:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:33:56,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:33:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:56,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:33:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:56,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:33:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:56,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-14 09:33:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:56,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-02-14 09:33:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:56,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-02-14 09:33:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-14 09:33:56,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:33:56,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60459586] [2023-02-14 09:33:56,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60459586] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 09:33:56,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 09:33:56,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 09:33:56,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052812730] [2023-02-14 09:33:56,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 09:33:56,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 09:33:56,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:33:56,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 09:33:56,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 09:33:56,661 INFO L87 Difference]: Start difference. First operand 793 states and 1024 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-14 09:33:57,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:33:57,124 INFO L93 Difference]: Finished difference Result 862 states and 1110 transitions. [2023-02-14 09:33:57,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 09:33:57,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2023-02-14 09:33:57,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:33:57,127 INFO L225 Difference]: With dead ends: 862 [2023-02-14 09:33:57,127 INFO L226 Difference]: Without dead ends: 813 [2023-02-14 09:33:57,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-14 09:33:57,128 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 12 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 09:33:57,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 174 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 09:33:57,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2023-02-14 09:33:57,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 805. [2023-02-14 09:33:57,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 776 states have (on average 1.2835051546391754) internal successors, (996), 780 states have internal predecessors, (996), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-14 09:33:57,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1036 transitions. [2023-02-14 09:33:57,591 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1036 transitions. Word has length 73 [2023-02-14 09:33:57,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:33:57,592 INFO L495 AbstractCegarLoop]: Abstraction has 805 states and 1036 transitions. [2023-02-14 09:33:57,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-14 09:33:57,592 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1036 transitions. [2023-02-14 09:33:57,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-14 09:33:57,609 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:33:57,609 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:33:57,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-02-14 09:33:57,610 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:33:57,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:33:57,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1900032544, now seen corresponding path program 1 times [2023-02-14 09:33:57,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:33:57,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103939726] [2023-02-14 09:33:57,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:33:57,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:33:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:57,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:33:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:57,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:33:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:57,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-14 09:33:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:57,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-02-14 09:33:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:57,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-02-14 09:33:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 09:33:57,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:33:57,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103939726] [2023-02-14 09:33:57,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103939726] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:33:57,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279330404] [2023-02-14 09:33:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:33:57,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:33:57,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:33:57,779 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:33:57,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-14 09:33:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:57,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 09:33:57,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:33:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 09:33:57,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:33:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 09:33:58,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279330404] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:33:58,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:33:58,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2023-02-14 09:33:58,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593812744] [2023-02-14 09:33:58,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:33:58,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 09:33:58,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:33:58,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 09:33:58,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-14 09:33:58,104 INFO L87 Difference]: Start difference. First operand 805 states and 1036 transitions. Second operand has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-14 09:33:58,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:33:58,687 INFO L93 Difference]: Finished difference Result 818 states and 1047 transitions. [2023-02-14 09:33:58,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 09:33:58,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 74 [2023-02-14 09:33:58,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:33:58,689 INFO L225 Difference]: With dead ends: 818 [2023-02-14 09:33:58,689 INFO L226 Difference]: Without dead ends: 758 [2023-02-14 09:33:58,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-02-14 09:33:58,690 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 62 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 09:33:58,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 672 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 09:33:58,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2023-02-14 09:33:59,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 758. [2023-02-14 09:33:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 734 states have (on average 1.2956403269754768) internal successors, (951), 737 states have internal predecessors, (951), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-14 09:33:59,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 981 transitions. [2023-02-14 09:33:59,081 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 981 transitions. Word has length 74 [2023-02-14 09:33:59,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:33:59,081 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 981 transitions. [2023-02-14 09:33:59,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-14 09:33:59,081 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 981 transitions. [2023-02-14 09:33:59,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-14 09:33:59,082 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:33:59,083 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 09:33:59,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-02-14 09:33:59,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-14 09:33:59,289 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:33:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:33:59,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1078383189, now seen corresponding path program 2 times [2023-02-14 09:33:59,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:33:59,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578828808] [2023-02-14 09:33:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:33:59,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:33:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:59,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:33:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:59,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:33:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:59,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-14 09:33:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:59,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-14 09:33:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:59,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-02-14 09:33:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:33:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-14 09:33:59,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:33:59,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578828808] [2023-02-14 09:33:59,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578828808] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:33:59,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969745893] [2023-02-14 09:33:59,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 09:33:59,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:33:59,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:33:59,487 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:33:59,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-14 09:33:59,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 09:33:59,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:33:59,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-14 09:33:59,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:33:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-14 09:33:59,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:34:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 09:34:00,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969745893] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:34:00,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:34:00,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 10] total 25 [2023-02-14 09:34:00,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140005046] [2023-02-14 09:34:00,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:34:00,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 09:34:00,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:34:00,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 09:34:00,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-02-14 09:34:00,091 INFO L87 Difference]: Start difference. First operand 758 states and 981 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-14 09:34:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:34:01,619 INFO L93 Difference]: Finished difference Result 1141 states and 1474 transitions. [2023-02-14 09:34:01,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-14 09:34:01,619 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 74 [2023-02-14 09:34:01,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:34:01,622 INFO L225 Difference]: With dead ends: 1141 [2023-02-14 09:34:01,622 INFO L226 Difference]: Without dead ends: 1035 [2023-02-14 09:34:01,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2023-02-14 09:34:01,623 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 343 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 09:34:01,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 823 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 09:34:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2023-02-14 09:34:02,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 760. [2023-02-14 09:34:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 736 states have (on average 1.28125) internal successors, (943), 739 states have internal predecessors, (943), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-14 09:34:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 973 transitions. [2023-02-14 09:34:02,023 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 973 transitions. Word has length 74 [2023-02-14 09:34:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:34:02,023 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 973 transitions. [2023-02-14 09:34:02,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-02-14 09:34:02,024 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 973 transitions. [2023-02-14 09:34:02,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 09:34:02,025 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:34:02,025 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 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] [2023-02-14 09:34:02,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-02-14 09:34:02,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-14 09:34:02,229 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:34:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:34:02,230 INFO L85 PathProgramCache]: Analyzing trace with hash 894264333, now seen corresponding path program 13 times [2023-02-14 09:34:02,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:34:02,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402694927] [2023-02-14 09:34:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:34:02,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:34:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:34:02,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:34:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:34:02,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:34:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:34:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 09:34:02,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:34:02,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402694927] [2023-02-14 09:34:02,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402694927] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:34:02,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286761374] [2023-02-14 09:34:02,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 09:34:02,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:34:02,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:34:02,556 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:34:02,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-14 09:34:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:34:02,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-14 09:34:02,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:34:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-14 09:34:02,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:34:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 09:34:03,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286761374] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:34:03,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:34:03,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14] total 33 [2023-02-14 09:34:03,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948725453] [2023-02-14 09:34:03,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:34:03,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 09:34:03,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:34:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 09:34:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 09:34:03,107 INFO L87 Difference]: Start difference. First operand 760 states and 973 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:34:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:34:06,281 INFO L93 Difference]: Finished difference Result 2724 states and 3534 transitions. [2023-02-14 09:34:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-14 09:34:06,282 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2023-02-14 09:34:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:34:06,294 INFO L225 Difference]: With dead ends: 2724 [2023-02-14 09:34:06,294 INFO L226 Difference]: Without dead ends: 2256 [2023-02-14 09:34:06,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=524, Invalid=3636, Unknown=0, NotChecked=0, Total=4160 [2023-02-14 09:34:06,296 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 1643 mSDsluCounter, 2619 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 2791 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 09:34:06,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 2791 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1930 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 09:34:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2023-02-14 09:34:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 834. [2023-02-14 09:34:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 810 states have (on average 1.2938271604938272) internal successors, (1048), 813 states have internal predecessors, (1048), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-14 09:34:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1078 transitions. [2023-02-14 09:34:06,762 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1078 transitions. Word has length 71 [2023-02-14 09:34:06,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:34:06,763 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1078 transitions. [2023-02-14 09:34:06,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:34:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1078 transitions. [2023-02-14 09:34:06,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 09:34:06,764 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:34:06,764 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 3, 3, 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, 1, 1] [2023-02-14 09:34:06,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-02-14 09:34:06,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-14 09:34:06,970 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:34:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:34:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1854811415, now seen corresponding path program 1 times [2023-02-14 09:34:06,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:34:06,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937272666] [2023-02-14 09:34:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:34:06,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:34:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:34:07,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:34:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:34:07,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:34:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:34:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-14 09:34:07,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:34:07,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937272666] [2023-02-14 09:34:07,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937272666] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:34:07,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216745965] [2023-02-14 09:34:07,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:34:07,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:34:07,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:34:07,178 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:34:07,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-14 09:34:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:34:07,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 09:34:07,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:34:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 40 proven. 42 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-14 09:34:07,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:34:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 40 proven. 21 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-14 09:34:07,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216745965] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:34:07,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:34:07,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 33 [2023-02-14 09:34:07,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566656753] [2023-02-14 09:34:07,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:34:07,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 09:34:07,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:34:07,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 09:34:07,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 09:34:07,677 INFO L87 Difference]: Start difference. First operand 834 states and 1078 transitions. Second operand has 33 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:34:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 09:34:09,134 INFO L93 Difference]: Finished difference Result 1285 states and 1643 transitions. [2023-02-14 09:34:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-14 09:34:09,134 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2023-02-14 09:34:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 09:34:09,136 INFO L225 Difference]: With dead ends: 1285 [2023-02-14 09:34:09,136 INFO L226 Difference]: Without dead ends: 977 [2023-02-14 09:34:09,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2023-02-14 09:34:09,137 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 114 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 09:34:09,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1804 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 09:34:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2023-02-14 09:34:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 812. [2023-02-14 09:34:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 788 states have (on average 1.2931472081218274) internal successors, (1019), 791 states have internal predecessors, (1019), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-14 09:34:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1049 transitions. [2023-02-14 09:34:09,605 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1049 transitions. Word has length 71 [2023-02-14 09:34:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 09:34:09,605 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1049 transitions. [2023-02-14 09:34:09,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-14 09:34:09,606 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1049 transitions. [2023-02-14 09:34:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-14 09:34:09,607 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 09:34:09,607 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2023-02-14 09:34:09,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-14 09:34:09,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-14 09:34:09,812 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 09:34:09,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 09:34:09,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1292302041, now seen corresponding path program 4 times [2023-02-14 09:34:09,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 09:34:09,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903327856] [2023-02-14 09:34:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 09:34:09,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 09:34:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:34:10,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 09:34:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:34:10,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 09:34:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 09:34:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-14 09:34:10,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 09:34:10,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903327856] [2023-02-14 09:34:10,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903327856] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 09:34:10,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289004186] [2023-02-14 09:34:10,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 09:34:10,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 09:34:10,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 09:34:10,508 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 09:34:10,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-14 09:34:10,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 09:34:10,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 09:34:10,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-14 09:34:10,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 09:34:10,987 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 09:34:11,663 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-02-14 09:34:11,663 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 20 [2023-02-14 09:34:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 7 proven. 74 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 09:34:11,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 09:34:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-14 09:34:12,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289004186] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 09:34:12,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 09:34:12,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28, 16] total 56 [2023-02-14 09:34:12,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674056900] [2023-02-14 09:34:12,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 09:34:12,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-14 09:34:12,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 09:34:12,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-14 09:34:12,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2724, Unknown=0, NotChecked=0, Total=3080 [2023-02-14 09:34:12,273 INFO L87 Difference]: Start difference. First operand 812 states and 1049 transitions. Second operand has 56 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 54 states have internal predecessors, (146), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4)