./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_length_check-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/list-ext3-properties/sll_length_check-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 0b1cf2dd5b4da09460afcca66f285dbd0591f4fa3369eb070fcfcc2c1d99d315 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 00:53:19,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 00:53:19,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 00:53:19,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 00:53:19,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 00:53:19,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 00:53:19,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 00:53:19,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 00:53:19,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 00:53:19,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 00:53:19,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 00:53:19,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 00:53:19,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 00:53:19,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 00:53:19,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 00:53:19,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 00:53:19,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 00:53:19,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 00:53:19,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 00:53:19,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 00:53:19,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 00:53:19,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 00:53:19,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 00:53:19,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 00:53:19,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 00:53:19,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 00:53:19,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 00:53:19,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 00:53:19,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 00:53:19,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 00:53:19,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 00:53:19,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 00:53:19,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 00:53:19,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 00:53:19,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 00:53:19,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 00:53:19,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 00:53:19,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 00:53:19,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 00:53:19,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 00:53:19,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 00:53:19,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 00:53:19,145 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 00:53:19,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 00:53:19,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 00:53:19,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 00:53:19,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 00:53:19,147 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 00:53:19,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 00:53:19,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 00:53:19,149 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 00:53:19,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 00:53:19,149 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 00:53:19,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 00:53:19,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 00:53:19,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 00:53:19,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 00:53:19,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 00:53:19,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 00:53:19,151 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 00:53:19,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 00:53:19,151 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 00:53:19,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 00:53:19,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 00:53:19,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 00:53:19,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 00:53:19,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 00:53:19,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 00:53:19,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 00:53:19,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 00:53:19,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 00:53:19,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 00:53:19,153 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 00:53:19,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 00:53:19,153 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 00:53:19,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 00:53:19,154 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 00:53:19,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b1cf2dd5b4da09460afcca66f285dbd0591f4fa3369eb070fcfcc2c1d99d315 [2023-02-17 00:53:19,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 00:53:19,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 00:53:19,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 00:53:19,395 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 00:53:19,396 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 00:53:19,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2023-02-17 00:53:20,454 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 00:53:20,654 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 00:53:20,654 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2023-02-17 00:53:20,662 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbf058838/590761f813bd4f089dcd782bdf8a3b6d/FLAG5f761586a [2023-02-17 00:53:20,673 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbf058838/590761f813bd4f089dcd782bdf8a3b6d [2023-02-17 00:53:20,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 00:53:20,676 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 00:53:20,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 00:53:20,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 00:53:20,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 00:53:20,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 12:53:20" (1/1) ... [2023-02-17 00:53:20,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a0f20b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:53:20, skipping insertion in model container [2023-02-17 00:53:20,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 12:53:20" (1/1) ... [2023-02-17 00:53:20,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 00:53:20,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 00:53:20,869 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/list-ext3-properties/sll_length_check-2.i[23814,23827] [2023-02-17 00:53:20,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 00:53:20,882 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 00:53:20,927 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/list-ext3-properties/sll_length_check-2.i[23814,23827] [2023-02-17 00:53:20,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 00:53:20,956 INFO L208 MainTranslator]: Completed translation [2023-02-17 00:53:20,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:53:20 WrapperNode [2023-02-17 00:53:20,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 00:53:20,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 00:53:20,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 00:53:20,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 00:53:20,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:53:20" (1/1) ... [2023-02-17 00:53:20,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:53:20" (1/1) ... [2023-02-17 00:53:20,997 INFO L138 Inliner]: procedures = 125, calls = 15, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 87 [2023-02-17 00:53:20,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 00:53:20,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 00:53:20,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 00:53:20,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 00:53:21,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:53:20" (1/1) ... [2023-02-17 00:53:21,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:53:20" (1/1) ... [2023-02-17 00:53:21,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:53:20" (1/1) ... [2023-02-17 00:53:21,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:53:20" (1/1) ... [2023-02-17 00:53:21,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:53:20" (1/1) ... [2023-02-17 00:53:21,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:53:20" (1/1) ... [2023-02-17 00:53:21,021 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:53:20" (1/1) ... [2023-02-17 00:53:21,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:53:20" (1/1) ... [2023-02-17 00:53:21,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 00:53:21,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 00:53:21,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 00:53:21,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 00:53:21,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:53:20" (1/1) ... [2023-02-17 00:53:21,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 00:53:21,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:53:21,056 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 00:53:21,073 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 00:53:21,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 00:53:21,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 00:53:21,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 00:53:21,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 00:53:21,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 00:53:21,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 00:53:21,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 00:53:21,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 00:53:21,217 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 00:53:21,221 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 00:53:21,324 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 00:53:21,328 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 00:53:21,328 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-17 00:53:21,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 12:53:21 BoogieIcfgContainer [2023-02-17 00:53:21,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 00:53:21,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 00:53:21,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 00:53:21,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 00:53:21,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 12:53:20" (1/3) ... [2023-02-17 00:53:21,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63bd4075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 12:53:21, skipping insertion in model container [2023-02-17 00:53:21,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:53:20" (2/3) ... [2023-02-17 00:53:21,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63bd4075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 12:53:21, skipping insertion in model container [2023-02-17 00:53:21,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 12:53:21" (3/3) ... [2023-02-17 00:53:21,336 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2023-02-17 00:53:21,347 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 00:53:21,352 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 00:53:21,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 00:53:21,397 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;@3c1c41fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 00:53:21,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 00:53:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 00:53:21,406 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:53:21,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:53:21,407 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:53:21,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:53:21,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1050078975, now seen corresponding path program 1 times [2023-02-17 00:53:21,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:53:21,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715693633] [2023-02-17 00:53:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:21,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:53:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:21,521 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 00:53:21,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:53:21,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715693633] [2023-02-17 00:53:21,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715693633] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:53:21,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:53:21,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 00:53:21,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12265978] [2023-02-17 00:53:21,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:53:21,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 00:53:21,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:53:21,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 00:53:21,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 00:53:21,567 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:21,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:53:21,586 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2023-02-17 00:53:21,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 00:53:21,588 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-17 00:53:21,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:53:21,599 INFO L225 Difference]: With dead ends: 41 [2023-02-17 00:53:21,599 INFO L226 Difference]: Without dead ends: 17 [2023-02-17 00:53:21,602 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 00:53:21,607 INFO L413 NwaCegarLoop]: 28 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, 28 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 00:53:21,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:53:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-17 00:53:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-17 00:53:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-02-17 00:53:21,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2023-02-17 00:53:21,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:53:21,637 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-02-17 00:53:21,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:21,638 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-02-17 00:53:21,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 00:53:21,638 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:53:21,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:53:21,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 00:53:21,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:53:21,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:53:21,641 INFO L85 PathProgramCache]: Analyzing trace with hash 924106356, now seen corresponding path program 1 times [2023-02-17 00:53:21,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:53:21,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907331276] [2023-02-17 00:53:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:21,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:53:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:21,777 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 00:53:21,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:53:21,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907331276] [2023-02-17 00:53:21,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907331276] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:53:21,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:53:21,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 00:53:21,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208828703] [2023-02-17 00:53:21,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:53:21,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 00:53:21,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:53:21,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 00:53:21,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 00:53:21,781 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:21,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:53:21,823 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2023-02-17 00:53:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 00:53:21,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-17 00:53:21,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:53:21,824 INFO L225 Difference]: With dead ends: 43 [2023-02-17 00:53:21,825 INFO L226 Difference]: Without dead ends: 35 [2023-02-17 00:53:21,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 00:53:21,826 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:53:21,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:53:21,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-17 00:53:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2023-02-17 00:53:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-02-17 00:53:21,830 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2023-02-17 00:53:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:53:21,831 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-02-17 00:53:21,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-02-17 00:53:21,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 00:53:21,832 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:53:21,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:53:21,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 00:53:21,832 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:53:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:53:21,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1149244957, now seen corresponding path program 1 times [2023-02-17 00:53:21,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:53:21,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064104391] [2023-02-17 00:53:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:21,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:53:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:53:21,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:53:21,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064104391] [2023-02-17 00:53:21,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064104391] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:53:21,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038139469] [2023-02-17 00:53:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:21,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:21,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:53:21,927 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 00:53:21,928 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 00:53:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:22,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 00:53:22,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:53:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:53:22,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:53:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:53:22,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038139469] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:53:22,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:53:22,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-02-17 00:53:22,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512455628] [2023-02-17 00:53:22,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:53:22,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 00:53:22,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:53:22,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 00:53:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-17 00:53:22,101 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:22,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:53:22,163 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2023-02-17 00:53:22,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 00:53:22,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-17 00:53:22,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:53:22,165 INFO L225 Difference]: With dead ends: 48 [2023-02-17 00:53:22,167 INFO L226 Difference]: Without dead ends: 40 [2023-02-17 00:53:22,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-17 00:53:22,168 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:53:22,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 67 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:53:22,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-17 00:53:22,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 21. [2023-02-17 00:53:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:22,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-02-17 00:53:22,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2023-02-17 00:53:22,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:53:22,176 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-02-17 00:53:22,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:22,176 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-02-17 00:53:22,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 00:53:22,177 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:53:22,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:53:22,192 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 00:53:22,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:22,382 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:53:22,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:53:22,383 INFO L85 PathProgramCache]: Analyzing trace with hash -485609004, now seen corresponding path program 2 times [2023-02-17 00:53:22,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:53:22,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293826993] [2023-02-17 00:53:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:22,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:53:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 00:53:22,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:53:22,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293826993] [2023-02-17 00:53:22,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293826993] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:53:22,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:53:22,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 00:53:22,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313008478] [2023-02-17 00:53:22,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:53:22,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 00:53:22,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:53:22,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 00:53:22,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 00:53:22,514 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:53:22,536 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-02-17 00:53:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 00:53:22,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-17 00:53:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:53:22,537 INFO L225 Difference]: With dead ends: 27 [2023-02-17 00:53:22,537 INFO L226 Difference]: Without dead ends: 22 [2023-02-17 00:53:22,537 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 00:53:22,538 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:53:22,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 56 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:53:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-17 00:53:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-17 00:53:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-02-17 00:53:22,546 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 20 [2023-02-17 00:53:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:53:22,547 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-02-17 00:53:22,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-02-17 00:53:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 00:53:22,548 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:53:22,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:53:22,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 00:53:22,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:53:22,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:53:22,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2117322972, now seen corresponding path program 1 times [2023-02-17 00:53:22,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:53:22,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026245972] [2023-02-17 00:53:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:22,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:53:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:53:22,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:53:22,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026245972] [2023-02-17 00:53:22,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026245972] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:53:22,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255371830] [2023-02-17 00:53:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:22,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:22,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:53:22,735 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 00:53:22,736 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 00:53:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:22,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-17 00:53:22,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:53:22,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 00:53:22,911 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 16 treesize of output 8 [2023-02-17 00:53:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:53:22,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:53:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:53:22,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255371830] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:53:22,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:53:22,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 12 [2023-02-17 00:53:22,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996337768] [2023-02-17 00:53:22,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:53:22,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 00:53:22,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:53:22,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 00:53:22,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-17 00:53:22,935 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:53:23,002 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-02-17 00:53:23,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 00:53:23,003 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-17 00:53:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:53:23,004 INFO L225 Difference]: With dead ends: 30 [2023-02-17 00:53:23,004 INFO L226 Difference]: Without dead ends: 25 [2023-02-17 00:53:23,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-02-17 00:53:23,005 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:53:23,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 100 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:53:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-17 00:53:23,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-02-17 00:53:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-02-17 00:53:23,014 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2023-02-17 00:53:23,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:53:23,015 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-02-17 00:53:23,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:23,015 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-02-17 00:53:23,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 00:53:23,016 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:53:23,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:53:23,023 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 00:53:23,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:23,221 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:53:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:53:23,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1160848428, now seen corresponding path program 2 times [2023-02-17 00:53:23,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:53:23,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718903389] [2023-02-17 00:53:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:23,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:53:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 00:53:23,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:53:23,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718903389] [2023-02-17 00:53:23,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718903389] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:53:23,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040596929] [2023-02-17 00:53:23,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 00:53:23,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:23,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:53:23,305 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 00:53:23,355 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 00:53:23,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 00:53:23,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:53:23,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-17 00:53:23,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:53:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 00:53:23,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:53:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 00:53:23,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040596929] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:53:23,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:53:23,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-02-17 00:53:23,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595657394] [2023-02-17 00:53:23,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:53:23,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 00:53:23,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:53:23,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 00:53:23,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-17 00:53:23,484 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:53:23,540 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2023-02-17 00:53:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 00:53:23,542 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-17 00:53:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:53:23,543 INFO L225 Difference]: With dead ends: 50 [2023-02-17 00:53:23,543 INFO L226 Difference]: Without dead ends: 45 [2023-02-17 00:53:23,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-02-17 00:53:23,544 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:53:23,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 97 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:53:23,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-17 00:53:23,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2023-02-17 00:53:23,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:23,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-02-17 00:53:23,554 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 22 [2023-02-17 00:53:23,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:53:23,554 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-02-17 00:53:23,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:23,555 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-02-17 00:53:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 00:53:23,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:53:23,557 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:53:23,563 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 00:53:23,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:23,762 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:53:23,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:53:23,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1574908636, now seen corresponding path program 3 times [2023-02-17 00:53:23,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:53:23,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527878661] [2023-02-17 00:53:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:23,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:53:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:53:24,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:53:24,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527878661] [2023-02-17 00:53:24,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527878661] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:53:24,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142402712] [2023-02-17 00:53:24,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 00:53:24,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:24,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:53:24,110 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 00:53:24,112 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 00:53:24,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 00:53:24,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:53:24,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-17 00:53:24,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:53:24,182 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 00:53:24,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 00:53:24,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 00:53:24,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:53:24,229 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 00:53:24,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-17 00:53:24,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-17 00:53:24,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:53:24,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 51 [2023-02-17 00:53:24,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:53:24,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2023-02-17 00:53:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:53:24,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:53:26,378 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| Int)) (or (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0)))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| Int)) (or (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0))))) is different from false [2023-02-17 00:53:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-02-17 00:53:26,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142402712] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:53:26,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:53:26,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-02-17 00:53:26,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433820098] [2023-02-17 00:53:26,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:53:26,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 00:53:26,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:53:26,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 00:53:26,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=331, Unknown=1, NotChecked=36, Total=420 [2023-02-17 00:53:26,455 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:28,488 WARN L837 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| Int)) (or (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0)))) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| Int)) (or (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0)))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0)) is different from false [2023-02-17 00:53:28,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:53:28,613 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2023-02-17 00:53:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 00:53:28,614 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-17 00:53:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:53:28,614 INFO L225 Difference]: With dead ends: 68 [2023-02-17 00:53:28,615 INFO L226 Difference]: Without dead ends: 57 [2023-02-17 00:53:28,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=86, Invalid=472, Unknown=2, NotChecked=90, Total=650 [2023-02-17 00:53:28,615 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:53:28,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 194 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2023-02-17 00:53:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-17 00:53:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2023-02-17 00:53:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2023-02-17 00:53:28,623 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 23 [2023-02-17 00:53:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:53:28,624 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2023-02-17 00:53:28,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:28,624 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2023-02-17 00:53:28,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 00:53:28,624 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:53:28,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:53:28,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-17 00:53:28,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:28,829 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:53:28,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:53:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2090698365, now seen corresponding path program 1 times [2023-02-17 00:53:28,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:53:28,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49070542] [2023-02-17 00:53:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:28,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:53:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 00:53:28,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:53:28,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49070542] [2023-02-17 00:53:28,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49070542] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:53:28,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302951479] [2023-02-17 00:53:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:28,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:28,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:53:28,875 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 00:53:28,877 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 00:53:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:28,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 00:53:28,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:53:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 00:53:28,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:53:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 00:53:28,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302951479] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:53:28,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:53:28,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-02-17 00:53:28,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572730408] [2023-02-17 00:53:28,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:53:28,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 00:53:28,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:53:28,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 00:53:28,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-17 00:53:28,984 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:53:29,036 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2023-02-17 00:53:29,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 00:53:29,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-17 00:53:29,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:53:29,037 INFO L225 Difference]: With dead ends: 61 [2023-02-17 00:53:29,037 INFO L226 Difference]: Without dead ends: 51 [2023-02-17 00:53:29,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-02-17 00:53:29,038 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 84 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:53:29,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 99 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:53:29,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-17 00:53:29,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2023-02-17 00:53:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2023-02-17 00:53:29,044 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 25 [2023-02-17 00:53:29,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:53:29,044 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2023-02-17 00:53:29,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2023-02-17 00:53:29,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 00:53:29,045 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:53:29,045 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:53:29,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-17 00:53:29,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:29,250 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:53:29,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:53:29,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1224539237, now seen corresponding path program 4 times [2023-02-17 00:53:29,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:53:29,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083966528] [2023-02-17 00:53:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:29,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:53:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 00:53:29,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:53:29,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083966528] [2023-02-17 00:53:29,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083966528] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:53:29,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467254522] [2023-02-17 00:53:29,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 00:53:29,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:29,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:53:29,327 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 00:53:29,341 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 00:53:29,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 00:53:29,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:53:29,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 00:53:29,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:53:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 00:53:29,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 00:53:29,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467254522] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:53:29,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 00:53:29,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2023-02-17 00:53:29,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35176932] [2023-02-17 00:53:29,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:53:29,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 00:53:29,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:53:29,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 00:53:29,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-17 00:53:29,438 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:29,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:53:29,479 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2023-02-17 00:53:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 00:53:29,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-17 00:53:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:53:29,480 INFO L225 Difference]: With dead ends: 51 [2023-02-17 00:53:29,480 INFO L226 Difference]: Without dead ends: 29 [2023-02-17 00:53:29,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-02-17 00:53:29,480 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:53:29,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 44 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:53:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-17 00:53:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-17 00:53:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-02-17 00:53:29,484 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 26 [2023-02-17 00:53:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:53:29,484 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-02-17 00:53:29,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-02-17 00:53:29,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 00:53:29,485 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:53:29,485 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:53:29,491 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 00:53:29,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:29,686 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:53:29,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:53:29,686 INFO L85 PathProgramCache]: Analyzing trace with hash -517577932, now seen corresponding path program 2 times [2023-02-17 00:53:29,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:53:29,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338095981] [2023-02-17 00:53:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:29,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:53:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 00:53:29,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:53:29,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338095981] [2023-02-17 00:53:29,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338095981] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:53:29,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803371405] [2023-02-17 00:53:29,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 00:53:29,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:29,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:53:29,962 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 00:53:29,963 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 00:53:30,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 00:53:30,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:53:30,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-17 00:53:30,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:53:30,032 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 00:53:30,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 00:53:30,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:53:30,060 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 00:53:30,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 00:53:30,079 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 20 treesize of output 19 [2023-02-17 00:53:30,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-17 00:53:30,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:53:30,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2023-02-17 00:53:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 00:53:30,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:53:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 00:53:30,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803371405] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:53:30,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:53:30,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2023-02-17 00:53:30,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058291565] [2023-02-17 00:53:30,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:53:30,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 00:53:30,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:53:30,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 00:53:30,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-02-17 00:53:30,229 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:30,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:53:30,427 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-02-17 00:53:30,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 00:53:30,429 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-17 00:53:30,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:53:30,429 INFO L225 Difference]: With dead ends: 37 [2023-02-17 00:53:30,429 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 00:53:30,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2023-02-17 00:53:30,430 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 111 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:53:30,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 156 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:53:30,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 00:53:30,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-02-17 00:53:30,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:30,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-02-17 00:53:30,435 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 28 [2023-02-17 00:53:30,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:53:30,435 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-02-17 00:53:30,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:30,435 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-02-17 00:53:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 00:53:30,435 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:53:30,435 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:53:30,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-17 00:53:30,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:30,636 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:53:30,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:53:30,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1186607556, now seen corresponding path program 3 times [2023-02-17 00:53:30,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:53:30,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803225093] [2023-02-17 00:53:30,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:30,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:53:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 00:53:30,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:53:30,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803225093] [2023-02-17 00:53:30,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803225093] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:53:30,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342765376] [2023-02-17 00:53:30,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 00:53:30,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:30,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:53:30,737 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 00:53:30,740 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 00:53:30,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 00:53:30,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:53:30,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 00:53:30,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:53:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 00:53:30,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:53:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 00:53:30,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342765376] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:53:30,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:53:30,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-02-17 00:53:30,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479968145] [2023-02-17 00:53:30,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:53:30,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 00:53:30,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:53:30,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 00:53:30,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-17 00:53:30,897 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:53:30,970 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-02-17 00:53:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 00:53:30,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-17 00:53:30,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:53:30,971 INFO L225 Difference]: With dead ends: 61 [2023-02-17 00:53:30,971 INFO L226 Difference]: Without dead ends: 56 [2023-02-17 00:53:30,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-02-17 00:53:30,972 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:53:30,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 132 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:53:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-17 00:53:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2023-02-17 00:53:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2023-02-17 00:53:30,978 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 29 [2023-02-17 00:53:30,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:53:30,979 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2023-02-17 00:53:30,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 00:53:30,979 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2023-02-17 00:53:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 00:53:30,979 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:53:30,980 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:53:30,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 00:53:31,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-17 00:53:31,184 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:53:31,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:53:31,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1818217164, now seen corresponding path program 4 times [2023-02-17 00:53:31,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:53:31,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294265983] [2023-02-17 00:53:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:53:31,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:53:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:53:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 00:53:31,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:53:31,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294265983] [2023-02-17 00:53:31,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294265983] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:53:31,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615078411] [2023-02-17 00:53:31,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 00:53:31,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:53:31,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:53:31,609 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 00:53:31,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 00:53:31,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 00:53:31,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:53:31,674 WARN L261 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-17 00:53:31,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:53:31,679 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 00:53:31,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 00:53:31,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 00:53:31,692 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:53:31,693 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 00:53:31,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-17 00:53:31,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-17 00:53:31,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:53:31,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 47 [2023-02-17 00:53:31,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:53:31,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 87 [2023-02-17 00:53:31,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:53:31,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:53:31,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 60 [2023-02-17 00:53:32,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:53:32,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 60 select indices, 60 select index equivalence classes, 0 disjoint index pairs (out of 1770 index pairs), introduced 78 new quantified variables, introduced 1770 case distinctions, treesize of input 1808 treesize of output 28494