./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/merge_sort-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/heap-manipulation/merge_sort-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 e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 00:27:19,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 00:27:19,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 00:27:19,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 00:27:19,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 00:27:19,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 00:27:19,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 00:27:19,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 00:27:20,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 00:27:20,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 00:27:20,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 00:27:20,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 00:27:20,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 00:27:20,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 00:27:20,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 00:27:20,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 00:27:20,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 00:27:20,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 00:27:20,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 00:27:20,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 00:27:20,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 00:27:20,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 00:27:20,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 00:27:20,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 00:27:20,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 00:27:20,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 00:27:20,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 00:27:20,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 00:27:20,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 00:27:20,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 00:27:20,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 00:27:20,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 00:27:20,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 00:27:20,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 00:27:20,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 00:27:20,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 00:27:20,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 00:27:20,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 00:27:20,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 00:27:20,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 00:27:20,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 00:27:20,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 00:27:20,081 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 00:27:20,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 00:27:20,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 00:27:20,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 00:27:20,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 00:27:20,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 00:27:20,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 00:27:20,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 00:27:20,084 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 00:27:20,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 00:27:20,085 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 00:27:20,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 00:27:20,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 00:27:20,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 00:27:20,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 00:27:20,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 00:27:20,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 00:27:20,086 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 00:27:20,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 00:27:20,087 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 00:27:20,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 00:27:20,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 00:27:20,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 00:27:20,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 00:27:20,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 00:27:20,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 00:27:20,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 00:27:20,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 00:27:20,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 00:27:20,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 00:27:20,089 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 00:27:20,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 00:27:20,089 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 00:27:20,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 00:27:20,089 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 00:27:20,090 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c [2023-02-17 00:27:20,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 00:27:20,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 00:27:20,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 00:27:20,347 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 00:27:20,347 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 00:27:20,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-02-17 00:27:21,493 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 00:27:21,721 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 00:27:21,722 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-02-17 00:27:21,734 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93c7c70c4/9b5bf702457348fb9c321456b3e46db8/FLAG418869b42 [2023-02-17 00:27:21,748 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93c7c70c4/9b5bf702457348fb9c321456b3e46db8 [2023-02-17 00:27:21,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 00:27:21,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 00:27:21,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 00:27:21,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 00:27:21,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 00:27:21,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 12:27:21" (1/1) ... [2023-02-17 00:27:21,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53589cba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:27:21, skipping insertion in model container [2023-02-17 00:27:21,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 12:27:21" (1/1) ... [2023-02-17 00:27:21,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 00:27:21,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 00:27:22,049 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/heap-manipulation/merge_sort-2.i[22632,22645] [2023-02-17 00:27:22,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 00:27:22,099 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 00:27:22,127 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/heap-manipulation/merge_sort-2.i[22632,22645] [2023-02-17 00:27:22,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 00:27:22,186 INFO L208 MainTranslator]: Completed translation [2023-02-17 00:27:22,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:27:22 WrapperNode [2023-02-17 00:27:22,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 00:27:22,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 00:27:22,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 00:27:22,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 00:27:22,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:27:22" (1/1) ... [2023-02-17 00:27:22,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:27:22" (1/1) ... [2023-02-17 00:27:22,233 INFO L138 Inliner]: procedures = 125, calls = 83, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 285 [2023-02-17 00:27:22,234 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 00:27:22,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 00:27:22,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 00:27:22,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 00:27:22,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:27:22" (1/1) ... [2023-02-17 00:27:22,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:27:22" (1/1) ... [2023-02-17 00:27:22,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:27:22" (1/1) ... [2023-02-17 00:27:22,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:27:22" (1/1) ... [2023-02-17 00:27:22,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:27:22" (1/1) ... [2023-02-17 00:27:22,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:27:22" (1/1) ... [2023-02-17 00:27:22,279 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:27:22" (1/1) ... [2023-02-17 00:27:22,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:27:22" (1/1) ... [2023-02-17 00:27:22,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 00:27:22,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 00:27:22,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 00:27:22,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 00:27:22,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:27:22" (1/1) ... [2023-02-17 00:27:22,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 00:27:22,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:27:22,320 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) [2023-02-17 00:27:22,322 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 [2023-02-17 00:27:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 00:27:22,358 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2023-02-17 00:27:22,358 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2023-02-17 00:27:22,358 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-02-17 00:27:22,358 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-02-17 00:27:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 00:27:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 00:27:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 00:27:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 00:27:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 00:27:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 00:27:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 00:27:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 00:27:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 00:27:22,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 00:27:22,477 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 00:27:22,484 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 00:27:22,905 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 00:27:22,919 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 00:27:22,919 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2023-02-17 00:27:22,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 12:27:22 BoogieIcfgContainer [2023-02-17 00:27:22,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 00:27:22,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 00:27:22,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 00:27:22,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 00:27:22,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 12:27:21" (1/3) ... [2023-02-17 00:27:22,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3794086d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 12:27:22, skipping insertion in model container [2023-02-17 00:27:22,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:27:22" (2/3) ... [2023-02-17 00:27:22,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3794086d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 12:27:22, skipping insertion in model container [2023-02-17 00:27:22,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 12:27:22" (3/3) ... [2023-02-17 00:27:22,931 INFO L112 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2023-02-17 00:27:22,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 00:27:22,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 00:27:22,999 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 00:27:23,005 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;@6a297873, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 00:27:23,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 00:27:23,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 77 states have (on average 1.8051948051948052) internal successors, (139), 93 states have internal predecessors, (139), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-17 00:27:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 00:27:23,015 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:23,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:27:23,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:23,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:23,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2117458630, now seen corresponding path program 1 times [2023-02-17 00:27:23,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:23,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569868608] [2023-02-17 00:27:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:23,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:23,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:23,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569868608] [2023-02-17 00:27:23,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569868608] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:23,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:23,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 00:27:23,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358762499] [2023-02-17 00:27:23,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:23,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 00:27:23,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:23,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 00:27:23,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 00:27:23,231 INFO L87 Difference]: Start difference. First operand has 96 states, 77 states have (on average 1.8051948051948052) internal successors, (139), 93 states have internal predecessors, (139), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:23,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:23,278 INFO L93 Difference]: Finished difference Result 188 states and 335 transitions. [2023-02-17 00:27:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 00:27:23,279 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-17 00:27:23,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:23,287 INFO L225 Difference]: With dead ends: 188 [2023-02-17 00:27:23,288 INFO L226 Difference]: Without dead ends: 87 [2023-02-17 00:27:23,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 00:27:23,296 INFO L413 NwaCegarLoop]: 119 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, 119 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 [2023-02-17 00:27:23,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:27:23,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-02-17 00:27:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-02-17 00:27:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 84 states have internal predecessors, (93), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:23,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2023-02-17 00:27:23,343 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 7 [2023-02-17 00:27:23,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:23,344 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2023-02-17 00:27:23,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2023-02-17 00:27:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 00:27:23,345 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:23,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:27:23,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 00:27:23,346 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:23,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:23,347 INFO L85 PathProgramCache]: Analyzing trace with hash 592840654, now seen corresponding path program 1 times [2023-02-17 00:27:23,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:23,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418459868] [2023-02-17 00:27:23,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:23,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:23,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418459868] [2023-02-17 00:27:23,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418459868] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:23,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:23,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 00:27:23,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344005715] [2023-02-17 00:27:23,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:23,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 00:27:23,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:23,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 00:27:23,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:27:23,429 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:23,480 INFO L93 Difference]: Finished difference Result 172 states and 218 transitions. [2023-02-17 00:27:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 00:27:23,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 00:27:23,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:23,483 INFO L225 Difference]: With dead ends: 172 [2023-02-17 00:27:23,483 INFO L226 Difference]: Without dead ends: 93 [2023-02-17 00:27:23,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 00:27:23,487 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 4 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:23,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 212 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:27:23,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-17 00:27:23,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2023-02-17 00:27:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 86 states have internal predecessors, (95), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2023-02-17 00:27:23,499 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 8 [2023-02-17 00:27:23,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:23,499 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2023-02-17 00:27:23,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:23,500 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2023-02-17 00:27:23,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 00:27:23,500 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:23,501 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:27:23,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 00:27:23,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:23,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1362713673, now seen corresponding path program 1 times [2023-02-17 00:27:23,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:23,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104817855] [2023-02-17 00:27:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:23,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:23,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:23,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104817855] [2023-02-17 00:27:23,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104817855] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:23,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:23,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 00:27:23,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476599112] [2023-02-17 00:27:23,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:23,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 00:27:23,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:23,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 00:27:23,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:27:23,739 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:23,889 INFO L93 Difference]: Finished difference Result 235 states and 308 transitions. [2023-02-17 00:27:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 00:27:23,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-17 00:27:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:23,895 INFO L225 Difference]: With dead ends: 235 [2023-02-17 00:27:23,895 INFO L226 Difference]: Without dead ends: 230 [2023-02-17 00:27:23,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 00:27:23,903 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 519 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:23,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 276 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:27:23,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-02-17 00:27:23,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 92. [2023-02-17 00:27:23,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 89 states have internal predecessors, (99), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2023-02-17 00:27:23,923 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 14 [2023-02-17 00:27:23,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:23,923 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2023-02-17 00:27:23,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:23,924 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2023-02-17 00:27:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 00:27:23,924 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:23,924 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:27:23,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 00:27:23,925 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:23,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:23,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1343418310, now seen corresponding path program 1 times [2023-02-17 00:27:23,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:23,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320071024] [2023-02-17 00:27:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:23,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 00:27:24,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:24,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320071024] [2023-02-17 00:27:24,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320071024] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:24,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:24,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 00:27:24,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410000363] [2023-02-17 00:27:24,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:24,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 00:27:24,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:24,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 00:27:24,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:27:24,104 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:24,246 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2023-02-17 00:27:24,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 00:27:24,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-17 00:27:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:24,247 INFO L225 Difference]: With dead ends: 94 [2023-02-17 00:27:24,248 INFO L226 Difference]: Without dead ends: 91 [2023-02-17 00:27:24,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:27:24,256 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 12 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:24,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 319 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:27:24,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-17 00:27:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-02-17 00:27:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 88 states have internal predecessors, (98), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2023-02-17 00:27:24,270 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 21 [2023-02-17 00:27:24,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:24,270 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2023-02-17 00:27:24,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:24,271 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2023-02-17 00:27:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 00:27:24,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:24,271 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:27:24,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 00:27:24,272 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:24,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1668834300, now seen corresponding path program 1 times [2023-02-17 00:27:24,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:24,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832460809] [2023-02-17 00:27:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:24,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 00:27:24,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832460809] [2023-02-17 00:27:24,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832460809] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:24,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:24,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 00:27:24,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068055402] [2023-02-17 00:27:24,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:24,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 00:27:24,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:24,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 00:27:24,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:27:24,378 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:24,519 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2023-02-17 00:27:24,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 00:27:24,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-17 00:27:24,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:24,523 INFO L225 Difference]: With dead ends: 118 [2023-02-17 00:27:24,524 INFO L226 Difference]: Without dead ends: 115 [2023-02-17 00:27:24,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:27:24,525 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 39 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:24,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 284 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:27:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-17 00:27:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2023-02-17 00:27:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 87 states have internal predecessors, (97), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2023-02-17 00:27:24,554 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 21 [2023-02-17 00:27:24,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:24,555 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2023-02-17 00:27:24,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:24,555 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2023-02-17 00:27:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 00:27:24,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:24,557 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:27:24,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 00:27:24,557 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:24,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:24,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1088949266, now seen corresponding path program 1 times [2023-02-17 00:27:24,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:24,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400855160] [2023-02-17 00:27:24,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:24,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:24,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:24,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400855160] [2023-02-17 00:27:24,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400855160] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:24,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:24,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 00:27:24,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937614243] [2023-02-17 00:27:24,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:24,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 00:27:24,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:24,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 00:27:24,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:27:24,772 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:24,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:24,964 INFO L93 Difference]: Finished difference Result 195 states and 240 transitions. [2023-02-17 00:27:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 00:27:24,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-17 00:27:24,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:24,966 INFO L225 Difference]: With dead ends: 195 [2023-02-17 00:27:24,966 INFO L226 Difference]: Without dead ends: 192 [2023-02-17 00:27:24,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-17 00:27:24,969 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 357 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:24,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 283 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:27:24,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-17 00:27:24,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 96. [2023-02-17 00:27:24,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 93 states have internal predecessors, (103), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 117 transitions. [2023-02-17 00:27:24,989 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 117 transitions. Word has length 24 [2023-02-17 00:27:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:24,990 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 117 transitions. [2023-02-17 00:27:24,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 117 transitions. [2023-02-17 00:27:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 00:27:24,991 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:24,991 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:27:24,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 00:27:24,991 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1875885747, now seen corresponding path program 1 times [2023-02-17 00:27:24,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:24,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770897785] [2023-02-17 00:27:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:24,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:25,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:25,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770897785] [2023-02-17 00:27:25,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770897785] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:25,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:25,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 00:27:25,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072596566] [2023-02-17 00:27:25,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:25,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 00:27:25,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 00:27:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:27:25,144 INFO L87 Difference]: Start difference. First operand 96 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:25,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:25,356 INFO L93 Difference]: Finished difference Result 194 states and 238 transitions. [2023-02-17 00:27:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 00:27:25,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-17 00:27:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:25,359 INFO L225 Difference]: With dead ends: 194 [2023-02-17 00:27:25,359 INFO L226 Difference]: Without dead ends: 191 [2023-02-17 00:27:25,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-17 00:27:25,360 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 354 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:25,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 283 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:27:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-02-17 00:27:25,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 102. [2023-02-17 00:27:25,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 99 states have internal predecessors, (109), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2023-02-17 00:27:25,376 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 24 [2023-02-17 00:27:25,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:25,376 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2023-02-17 00:27:25,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:25,377 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2023-02-17 00:27:25,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 00:27:25,377 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:25,377 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-17 00:27:25,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 00:27:25,378 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:25,379 INFO L85 PathProgramCache]: Analyzing trace with hash 833312563, now seen corresponding path program 1 times [2023-02-17 00:27:25,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:25,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818406604] [2023-02-17 00:27:25,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:25,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:25,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:25,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818406604] [2023-02-17 00:27:25,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818406604] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:25,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:25,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 00:27:25,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809480540] [2023-02-17 00:27:25,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:25,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 00:27:25,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:25,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 00:27:25,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 00:27:25,742 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:26,130 INFO L93 Difference]: Finished difference Result 264 states and 335 transitions. [2023-02-17 00:27:26,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 00:27:26,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-17 00:27:26,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:26,133 INFO L225 Difference]: With dead ends: 264 [2023-02-17 00:27:26,133 INFO L226 Difference]: Without dead ends: 261 [2023-02-17 00:27:26,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-02-17 00:27:26,135 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 539 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:26,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 331 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 00:27:26,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-02-17 00:27:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 105. [2023-02-17 00:27:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 102 states have internal predecessors, (112), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2023-02-17 00:27:26,158 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 27 [2023-02-17 00:27:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:26,160 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2023-02-17 00:27:26,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:26,160 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2023-02-17 00:27:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 00:27:26,165 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:26,165 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-17 00:27:26,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 00:27:26,166 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:26,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:26,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1708085367, now seen corresponding path program 1 times [2023-02-17 00:27:26,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:26,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422096233] [2023-02-17 00:27:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:26,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:26,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:26,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422096233] [2023-02-17 00:27:26,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422096233] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:26,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:26,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 00:27:26,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548600415] [2023-02-17 00:27:26,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:26,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 00:27:26,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:26,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 00:27:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 00:27:26,471 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:26,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:26,844 INFO L93 Difference]: Finished difference Result 263 states and 333 transitions. [2023-02-17 00:27:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 00:27:26,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-17 00:27:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:26,847 INFO L225 Difference]: With dead ends: 263 [2023-02-17 00:27:26,847 INFO L226 Difference]: Without dead ends: 260 [2023-02-17 00:27:26,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-02-17 00:27:26,850 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 535 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:26,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 331 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 00:27:26,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-17 00:27:26,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 108. [2023-02-17 00:27:26,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 94 states have (on average 1.2234042553191489) internal successors, (115), 105 states have internal predecessors, (115), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2023-02-17 00:27:26,876 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 27 [2023-02-17 00:27:26,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:26,877 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2023-02-17 00:27:26,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:26,877 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2023-02-17 00:27:26,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-17 00:27:26,880 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:26,880 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] [2023-02-17 00:27:26,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 00:27:26,881 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:26,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:26,881 INFO L85 PathProgramCache]: Analyzing trace with hash -399551200, now seen corresponding path program 1 times [2023-02-17 00:27:26,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:26,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560849112] [2023-02-17 00:27:26,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:26,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 00:27:26,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:26,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560849112] [2023-02-17 00:27:26,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560849112] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:27:26,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160842519] [2023-02-17 00:27:26,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:26,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:26,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:27:26,965 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) [2023-02-17 00:27:26,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 00:27:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:27,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-17 00:27:27,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:27:27,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-02-17 00:27:27,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-02-17 00:27:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 00:27:27,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:27:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 00:27:27,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160842519] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:27:27,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:27:27,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-02-17 00:27:27,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720651565] [2023-02-17 00:27:27,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:27:27,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 00:27:27,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:27,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 00:27:27,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:27:27,190 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:27,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:27,302 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2023-02-17 00:27:27,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 00:27:27,303 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-17 00:27:27,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:27,303 INFO L225 Difference]: With dead ends: 110 [2023-02-17 00:27:27,304 INFO L226 Difference]: Without dead ends: 106 [2023-02-17 00:27:27,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-17 00:27:27,305 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 76 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:27,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 172 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:27:27,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-17 00:27:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-02-17 00:27:27,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 94 states have (on average 1.202127659574468) internal successors, (113), 103 states have internal predecessors, (113), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2023-02-17 00:27:27,329 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 32 [2023-02-17 00:27:27,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:27,329 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2023-02-17 00:27:27,329 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:27,329 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2023-02-17 00:27:27,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 00:27:27,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:27,330 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-17 00:27:27,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 00:27:27,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-17 00:27:27,536 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:27,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2096511860, now seen corresponding path program 1 times [2023-02-17 00:27:27,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:27,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934031410] [2023-02-17 00:27:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:27,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:27,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:27,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934031410] [2023-02-17 00:27:27,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934031410] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:27,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:27,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 00:27:27,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801858927] [2023-02-17 00:27:27,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:27,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 00:27:27,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:27,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 00:27:27,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:27:27,596 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:27,682 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2023-02-17 00:27:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 00:27:27,683 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-17 00:27:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:27,684 INFO L225 Difference]: With dead ends: 146 [2023-02-17 00:27:27,684 INFO L226 Difference]: Without dead ends: 143 [2023-02-17 00:27:27,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 00:27:27,685 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 272 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:27,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 325 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:27:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-17 00:27:27,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 110. [2023-02-17 00:27:27,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 107 states have internal predecessors, (118), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 130 transitions. [2023-02-17 00:27:27,711 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 130 transitions. Word has length 33 [2023-02-17 00:27:27,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:27,711 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 130 transitions. [2023-02-17 00:27:27,712 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:27,712 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 130 transitions. [2023-02-17 00:27:27,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 00:27:27,712 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:27,712 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-17 00:27:27,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 00:27:27,713 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:27,713 INFO L85 PathProgramCache]: Analyzing trace with hash -236025208, now seen corresponding path program 1 times [2023-02-17 00:27:27,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:27,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049617752] [2023-02-17 00:27:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:27,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:28,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:28,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049617752] [2023-02-17 00:27:28,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049617752] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:27:28,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596850197] [2023-02-17 00:27:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:28,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:28,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:27:28,012 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) [2023-02-17 00:27:28,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 00:27:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:28,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-17 00:27:28,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:27:28,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:28,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-17 00:27:28,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:28,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-17 00:27:28,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2023-02-17 00:27:28,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-17 00:27:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:28,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:27:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:28,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596850197] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:27:28,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:27:28,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 11 [2023-02-17 00:27:28,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577561678] [2023-02-17 00:27:28,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:27:28,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 00:27:28,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:28,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 00:27:28,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-17 00:27:28,251 INFO L87 Difference]: Start difference. First operand 110 states and 130 transitions. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:28,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:28,568 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2023-02-17 00:27:28,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 00:27:28,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-17 00:27:28,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:28,570 INFO L225 Difference]: With dead ends: 210 [2023-02-17 00:27:28,570 INFO L226 Difference]: Without dead ends: 207 [2023-02-17 00:27:28,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-02-17 00:27:28,571 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 120 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:28,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 528 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 00:27:28,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-17 00:27:28,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 174. [2023-02-17 00:27:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 162 states have (on average 1.1728395061728396) internal successors, (190), 171 states have internal predecessors, (190), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 202 transitions. [2023-02-17 00:27:28,607 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 202 transitions. Word has length 36 [2023-02-17 00:27:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:28,608 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 202 transitions. [2023-02-17 00:27:28,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 11 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 202 transitions. [2023-02-17 00:27:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 00:27:28,608 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:28,609 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] [2023-02-17 00:27:28,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 00:27:28,816 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,SelfDestructingSolverStorable11 [2023-02-17 00:27:28,816 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:28,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:28,816 INFO L85 PathProgramCache]: Analyzing trace with hash -73182163, now seen corresponding path program 1 times [2023-02-17 00:27:28,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:28,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496364144] [2023-02-17 00:27:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:28,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 00:27:29,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:29,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496364144] [2023-02-17 00:27:29,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496364144] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:27:29,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452273170] [2023-02-17 00:27:29,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:29,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:29,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:27:29,045 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) [2023-02-17 00:27:29,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 00:27:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:29,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-17 00:27:29,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:27:29,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:29,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-17 00:27:29,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:29,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-17 00:27:29,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2023-02-17 00:27:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 00:27:29,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:27:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 00:27:29,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452273170] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:27:29,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:27:29,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 13 [2023-02-17 00:27:29,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761577709] [2023-02-17 00:27:29,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:27:29,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 00:27:29,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:29,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 00:27:29,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-17 00:27:29,244 INFO L87 Difference]: Start difference. First operand 174 states and 202 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:29,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:29,526 INFO L93 Difference]: Finished difference Result 293 states and 359 transitions. [2023-02-17 00:27:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 00:27:29,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-17 00:27:29,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:29,529 INFO L225 Difference]: With dead ends: 293 [2023-02-17 00:27:29,529 INFO L226 Difference]: Without dead ends: 205 [2023-02-17 00:27:29,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-02-17 00:27:29,532 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 290 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:29,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 422 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 00:27:29,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-17 00:27:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 140. [2023-02-17 00:27:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 128 states have (on average 1.171875) internal successors, (150), 137 states have internal predecessors, (150), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2023-02-17 00:27:29,570 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 38 [2023-02-17 00:27:29,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:29,571 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2023-02-17 00:27:29,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2023-02-17 00:27:29,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 00:27:29,572 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:29,572 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-17 00:27:29,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 00:27:29,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:29,778 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:29,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:29,778 INFO L85 PathProgramCache]: Analyzing trace with hash 490774160, now seen corresponding path program 1 times [2023-02-17 00:27:29,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:29,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394915825] [2023-02-17 00:27:29,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:29,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:29,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:29,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394915825] [2023-02-17 00:27:29,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394915825] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:29,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:29,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 00:27:29,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599974946] [2023-02-17 00:27:29,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:29,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 00:27:29,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:29,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 00:27:29,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:27:29,839 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:29,945 INFO L93 Difference]: Finished difference Result 248 states and 308 transitions. [2023-02-17 00:27:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 00:27:29,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-17 00:27:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:29,947 INFO L225 Difference]: With dead ends: 248 [2023-02-17 00:27:29,947 INFO L226 Difference]: Without dead ends: 207 [2023-02-17 00:27:29,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-02-17 00:27:29,948 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 352 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:29,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 379 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:27:29,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-17 00:27:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 141. [2023-02-17 00:27:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 129 states have (on average 1.1705426356589148) internal successors, (151), 138 states have internal predecessors, (151), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 163 transitions. [2023-02-17 00:27:29,977 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 163 transitions. Word has length 38 [2023-02-17 00:27:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:29,978 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 163 transitions. [2023-02-17 00:27:29,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 163 transitions. [2023-02-17 00:27:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 00:27:29,978 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:29,978 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-17 00:27:29,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-17 00:27:29,979 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:29,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:29,979 INFO L85 PathProgramCache]: Analyzing trace with hash -557560351, now seen corresponding path program 1 times [2023-02-17 00:27:29,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:29,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401589196] [2023-02-17 00:27:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:29,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:30,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:30,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401589196] [2023-02-17 00:27:30,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401589196] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:30,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:30,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 00:27:30,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006399337] [2023-02-17 00:27:30,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:30,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 00:27:30,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:30,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 00:27:30,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-17 00:27:30,149 INFO L87 Difference]: Start difference. First operand 141 states and 163 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:30,346 INFO L93 Difference]: Finished difference Result 185 states and 215 transitions. [2023-02-17 00:27:30,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 00:27:30,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-17 00:27:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:30,348 INFO L225 Difference]: With dead ends: 185 [2023-02-17 00:27:30,348 INFO L226 Difference]: Without dead ends: 182 [2023-02-17 00:27:30,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-02-17 00:27:30,350 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 269 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:30,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 288 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:27:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-17 00:27:30,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 147. [2023-02-17 00:27:30,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 135 states have (on average 1.1703703703703703) internal successors, (158), 144 states have internal predecessors, (158), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:27:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2023-02-17 00:27:30,379 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 39 [2023-02-17 00:27:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:30,380 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2023-02-17 00:27:30,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:30,380 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2023-02-17 00:27:30,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 00:27:30,380 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:30,380 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-17 00:27:30,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-17 00:27:30,381 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:30,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:30,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1187191262, now seen corresponding path program 1 times [2023-02-17 00:27:30,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:30,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855723733] [2023-02-17 00:27:30,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:30,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 00:27:30,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:30,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855723733] [2023-02-17 00:27:30,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855723733] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:30,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:30,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 00:27:30,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003961442] [2023-02-17 00:27:30,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:30,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 00:27:30,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:30,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 00:27:30,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-17 00:27:30,493 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:30,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:30,769 INFO L93 Difference]: Finished difference Result 326 states and 425 transitions. [2023-02-17 00:27:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 00:27:30,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-17 00:27:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:30,772 INFO L225 Difference]: With dead ends: 326 [2023-02-17 00:27:30,772 INFO L226 Difference]: Without dead ends: 285 [2023-02-17 00:27:30,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2023-02-17 00:27:30,774 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 750 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:30,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 742 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:27:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-02-17 00:27:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 166. [2023-02-17 00:27:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 163 states have internal predecessors, (183), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 00:27:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 199 transitions. [2023-02-17 00:27:30,812 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 199 transitions. Word has length 39 [2023-02-17 00:27:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:30,813 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 199 transitions. [2023-02-17 00:27:30,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 199 transitions. [2023-02-17 00:27:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 00:27:30,814 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:30,814 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-17 00:27:30,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-17 00:27:30,814 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:30,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:30,815 INFO L85 PathProgramCache]: Analyzing trace with hash -294674703, now seen corresponding path program 2 times [2023-02-17 00:27:30,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:30,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864466570] [2023-02-17 00:27:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:30,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 00:27:31,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:31,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864466570] [2023-02-17 00:27:31,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864466570] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:27:31,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065891289] [2023-02-17 00:27:31,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 00:27:31,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:31,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:27:31,177 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) [2023-02-17 00:27:31,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 00:27:31,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-17 00:27:31,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:27:31,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-17 00:27:31,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:27:31,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-17 00:27:31,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-17 00:27:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 00:27:31,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 00:27:31,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065891289] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:31,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 00:27:31,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2023-02-17 00:27:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538933685] [2023-02-17 00:27:31,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:31,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 00:27:31,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 00:27:31,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-02-17 00:27:31,345 INFO L87 Difference]: Start difference. First operand 166 states and 199 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:31,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:31,566 INFO L93 Difference]: Finished difference Result 222 states and 275 transitions. [2023-02-17 00:27:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 00:27:31,566 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-17 00:27:31,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:31,568 INFO L225 Difference]: With dead ends: 222 [2023-02-17 00:27:31,568 INFO L226 Difference]: Without dead ends: 219 [2023-02-17 00:27:31,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-02-17 00:27:31,569 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 98 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:31,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 419 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:27:31,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-02-17 00:27:31,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 156. [2023-02-17 00:27:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 142 states have (on average 1.2183098591549295) internal successors, (173), 153 states have internal predecessors, (173), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 00:27:31,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 189 transitions. [2023-02-17 00:27:31,606 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 189 transitions. Word has length 42 [2023-02-17 00:27:31,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:31,606 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 189 transitions. [2023-02-17 00:27:31,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:31,606 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 189 transitions. [2023-02-17 00:27:31,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 00:27:31,607 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:31,607 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-02-17 00:27:31,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 00:27:31,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-17 00:27:31,812 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:31,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:31,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1447224354, now seen corresponding path program 1 times [2023-02-17 00:27:31,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:31,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754763572] [2023-02-17 00:27:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:31,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:32,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:32,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754763572] [2023-02-17 00:27:32,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754763572] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:27:32,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485847891] [2023-02-17 00:27:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:32,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:32,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:27:32,019 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) [2023-02-17 00:27:32,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 00:27:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:32,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-17 00:27:32,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:27:32,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:32,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-17 00:27:32,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:32,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-17 00:27:32,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2023-02-17 00:27:32,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-17 00:27:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:32,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:27:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:32,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485847891] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:27:32,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:27:32,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 10 [2023-02-17 00:27:32,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798301930] [2023-02-17 00:27:32,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:27:32,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 00:27:32,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:32,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 00:27:32,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-02-17 00:27:32,254 INFO L87 Difference]: Start difference. First operand 156 states and 189 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:32,406 INFO L93 Difference]: Finished difference Result 249 states and 306 transitions. [2023-02-17 00:27:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 00:27:32,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-17 00:27:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:32,408 INFO L225 Difference]: With dead ends: 249 [2023-02-17 00:27:32,408 INFO L226 Difference]: Without dead ends: 188 [2023-02-17 00:27:32,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-02-17 00:27:32,409 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 40 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:32,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 479 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:27:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-02-17 00:27:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 170. [2023-02-17 00:27:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 156 states have (on average 1.1987179487179487) internal successors, (187), 167 states have internal predecessors, (187), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 00:27:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 203 transitions. [2023-02-17 00:27:32,443 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 203 transitions. Word has length 42 [2023-02-17 00:27:32,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:32,444 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 203 transitions. [2023-02-17 00:27:32,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:32,444 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 203 transitions. [2023-02-17 00:27:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 00:27:32,445 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:32,445 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:27:32,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 00:27:32,649 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,SelfDestructingSolverStorable17 [2023-02-17 00:27:32,650 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:32,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:32,650 INFO L85 PathProgramCache]: Analyzing trace with hash -600772010, now seen corresponding path program 2 times [2023-02-17 00:27:32,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:32,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373754503] [2023-02-17 00:27:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:32,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:33,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:33,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373754503] [2023-02-17 00:27:33,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373754503] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:27:33,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229607819] [2023-02-17 00:27:33,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 00:27:33,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:33,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:27:33,171 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) [2023-02-17 00:27:33,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 00:27:33,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 00:27:33,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:27:33,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-17 00:27:33,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:27:33,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 00:27:33,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:33,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-17 00:27:33,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:33,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-17 00:27:33,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2023-02-17 00:27:33,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:33,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2023-02-17 00:27:33,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:33,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-17 00:27:33,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:33,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 28 [2023-02-17 00:27:33,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-17 00:27:33,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:33,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 31 [2023-02-17 00:27:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:33,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:27:33,652 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~item~0#1.base_12| Int) (v_ArrVal_690 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_12|) 0)) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_690))) (store .cse0 |v_ULTIMATE.start_main_~item~0#1.base_12| (store (store (select .cse0 |v_ULTIMATE.start_main_~item~0#1.base_12|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) (+ 4 0) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0)))) is different from false [2023-02-17 00:27:33,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:33,743 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 46 [2023-02-17 00:27:33,746 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 00:27:33,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:33,749 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 85 treesize of output 85 [2023-02-17 00:27:33,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 68 [2023-02-17 00:27:33,759 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:33,761 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:33,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 170 [2023-02-17 00:27:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-02-17 00:27:33,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229607819] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:27:33,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:27:33,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2023-02-17 00:27:33,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680656402] [2023-02-17 00:27:33,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:27:33,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-17 00:27:33,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:33,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-17 00:27:33,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=528, Unknown=1, NotChecked=46, Total=650 [2023-02-17 00:27:33,872 INFO L87 Difference]: Start difference. First operand 170 states and 203 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:35,364 INFO L93 Difference]: Finished difference Result 312 states and 377 transitions. [2023-02-17 00:27:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 00:27:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-17 00:27:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:35,366 INFO L225 Difference]: With dead ends: 312 [2023-02-17 00:27:35,367 INFO L226 Difference]: Without dead ends: 309 [2023-02-17 00:27:35,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=1024, Unknown=1, NotChecked=70, Total=1406 [2023-02-17 00:27:35,368 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 1314 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1318 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:35,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1318 Valid, 1249 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1096 Invalid, 0 Unknown, 291 Unchecked, 1.1s Time] [2023-02-17 00:27:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-02-17 00:27:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 181. [2023-02-17 00:27:35,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 167 states have (on average 1.1916167664670658) internal successors, (199), 178 states have internal predecessors, (199), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 00:27:35,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2023-02-17 00:27:35,424 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 44 [2023-02-17 00:27:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:35,424 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2023-02-17 00:27:35,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2023-02-17 00:27:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 00:27:35,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:35,425 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-02-17 00:27:35,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 00:27:35,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:35,631 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:35,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:35,631 INFO L85 PathProgramCache]: Analyzing trace with hash 186164471, now seen corresponding path program 1 times [2023-02-17 00:27:35,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:35,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990575729] [2023-02-17 00:27:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:35,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:36,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:36,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990575729] [2023-02-17 00:27:36,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990575729] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:27:36,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022772558] [2023-02-17 00:27:36,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:36,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:36,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:27:36,178 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) [2023-02-17 00:27:36,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 00:27:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:36,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-17 00:27:36,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:27:36,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 00:27:36,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:36,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-17 00:27:36,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:36,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 15 [2023-02-17 00:27:36,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2023-02-17 00:27:36,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:36,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-17 00:27:36,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:36,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:36,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 44 [2023-02-17 00:27:36,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-17 00:27:36,697 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:36,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 13 new quantified variables, introduced 45 case distinctions, treesize of input 159 treesize of output 230 [2023-02-17 00:27:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:40,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:27:40,332 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:40,332 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 75 [2023-02-17 00:27:40,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:40,339 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 693 treesize of output 667 [2023-02-17 00:27:40,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1037 treesize of output 989 [2023-02-17 00:27:40,533 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,544 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,547 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,549 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,551 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,553 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,564 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,567 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,569 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,571 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,573 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,576 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,579 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,580 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,582 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,586 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,587 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,589 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,593 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,596 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,599 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,601 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,604 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,606 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,607 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,609 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,611 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,612 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,614 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,616 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,617 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,619 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,620 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,623 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,625 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,627 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,628 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,630 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,632 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,633 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,635 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,637 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,638 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,640 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,641 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,643 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,644 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,646 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,648 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,649 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,651 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,652 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,654 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,655 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,657 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,658 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,660 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,661 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,663 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,665 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,667 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,669 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,670 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,672 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,673 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,675 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,676 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,678 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,680 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,683 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,684 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,686 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,688 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,689 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,690 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,692 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,694 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,695 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,697 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,699 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,700 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,702 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,703 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,705 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,707 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,708 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,712 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,714 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,716 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,718 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,719 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,720 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,722 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,723 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,724 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,726 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,727 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,729 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,730 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,732 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 00:27:40,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:40,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5391 treesize of output 5281 [2023-02-17 00:27:40,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:40,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 34 [2023-02-17 00:27:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:40,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022772558] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:27:40,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:27:40,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2023-02-17 00:27:40,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891942667] [2023-02-17 00:27:40,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:27:40,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-17 00:27:40,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:40,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-17 00:27:40,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=826, Unknown=14, NotChecked=0, Total=930 [2023-02-17 00:27:40,939 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand has 31 states, 31 states have (on average 3.5806451612903225) internal successors, (111), 31 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:43,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:43,123 INFO L93 Difference]: Finished difference Result 348 states and 424 transitions. [2023-02-17 00:27:43,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 00:27:43,124 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5806451612903225) internal successors, (111), 31 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-17 00:27:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:43,126 INFO L225 Difference]: With dead ends: 348 [2023-02-17 00:27:43,126 INFO L226 Difference]: Without dead ends: 345 [2023-02-17 00:27:43,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=530, Invalid=2006, Unknown=14, NotChecked=0, Total=2550 [2023-02-17 00:27:43,127 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 2151 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 74 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2153 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:43,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2153 Valid, 1224 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1209 Invalid, 1 Unknown, 0 Unchecked, 1.4s Time] [2023-02-17 00:27:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2023-02-17 00:27:43,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 188. [2023-02-17 00:27:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 174 states have (on average 1.1839080459770115) internal successors, (206), 185 states have internal predecessors, (206), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 00:27:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 222 transitions. [2023-02-17 00:27:43,193 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 222 transitions. Word has length 44 [2023-02-17 00:27:43,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:43,193 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 222 transitions. [2023-02-17 00:27:43,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5806451612903225) internal successors, (111), 31 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:43,193 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 222 transitions. [2023-02-17 00:27:43,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 00:27:43,194 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:43,194 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-02-17 00:27:43,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 00:27:43,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:43,401 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:43,401 INFO L85 PathProgramCache]: Analyzing trace with hash -498608819, now seen corresponding path program 1 times [2023-02-17 00:27:43,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:43,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114159843] [2023-02-17 00:27:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:43,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 00:27:43,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:43,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114159843] [2023-02-17 00:27:43,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114159843] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:27:43,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:27:43,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 00:27:43,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164580863] [2023-02-17 00:27:43,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:27:43,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 00:27:43,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:27:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 00:27:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:27:43,452 INFO L87 Difference]: Start difference. First operand 188 states and 222 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:27:43,571 INFO L93 Difference]: Finished difference Result 190 states and 223 transitions. [2023-02-17 00:27:43,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 00:27:43,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-17 00:27:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:27:43,574 INFO L225 Difference]: With dead ends: 190 [2023-02-17 00:27:43,574 INFO L226 Difference]: Without dead ends: 153 [2023-02-17 00:27:43,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:27:43,575 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:27:43,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 325 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:27:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-17 00:27:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-02-17 00:27:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 150 states have internal predecessors, (167), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 00:27:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2023-02-17 00:27:43,618 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 45 [2023-02-17 00:27:43,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:27:43,618 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2023-02-17 00:27:43,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:27:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2023-02-17 00:27:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-17 00:27:43,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:27:43,619 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:27:43,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-17 00:27:43,620 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:27:43,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:27:43,620 INFO L85 PathProgramCache]: Analyzing trace with hash -636511633, now seen corresponding path program 1 times [2023-02-17 00:27:43,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:27:43,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300469880] [2023-02-17 00:27:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:43,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:27:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:27:44,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:27:44,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300469880] [2023-02-17 00:27:44,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300469880] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:27:44,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376601817] [2023-02-17 00:27:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:27:44,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:27:44,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:27:44,589 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) [2023-02-17 00:27:44,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 00:27:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:27:44,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-17 00:27:44,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:27:44,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 00:27:44,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:44,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-17 00:27:44,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:44,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-17 00:27:44,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:44,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-17 00:27:44,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-17 00:27:44,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-17 00:27:44,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:44,878 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 00:27:44,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:44,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 47 [2023-02-17 00:27:44,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:27:44,884 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 00:27:44,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:44,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 71 [2023-02-17 00:27:45,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:45,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 23 select indices, 23 select index equivalence classes, 1 disjoint index pairs (out of 253 index pairs), introduced 34 new quantified variables, introduced 253 case distinctions, treesize of input 600 treesize of output 3261 [2023-02-17 00:27:45,775 INFO L217 Elim1Store]: Index analysis took 119 ms [2023-02-17 00:27:45,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:27:45,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 23 select indices, 23 select index equivalence classes, 2 disjoint index pairs (out of 253 index pairs), introduced 29 new quantified variables, introduced 247 case distinctions, treesize of input 2355 treesize of output 4107