./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy2_ground-1.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/array-examples/standard_copy2_ground-1.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 001066cca5a67e3c9af1d254dd4dcabba7e6cff5ea24a6e35ddcc570894db37c --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 18:14:04,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 18:14:04,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 18:14:04,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 18:14:04,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 18:14:04,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 18:14:04,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 18:14:04,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 18:14:04,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 18:14:04,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 18:14:04,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 18:14:04,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 18:14:04,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 18:14:04,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 18:14:04,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 18:14:04,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 18:14:04,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 18:14:04,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 18:14:04,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 18:14:04,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 18:14:04,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 18:14:04,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 18:14:04,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 18:14:04,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 18:14:04,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 18:14:04,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 18:14:04,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 18:14:04,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 18:14:04,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 18:14:04,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 18:14:04,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 18:14:04,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 18:14:04,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 18:14:04,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 18:14:04,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 18:14:04,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 18:14:04,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 18:14:04,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 18:14:04,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 18:14:04,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 18:14:04,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 18:14:04,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 18:14:04,199 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 18:14:04,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 18:14:04,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 18:14:04,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 18:14:04,203 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 18:14:04,203 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 18:14:04,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 18:14:04,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 18:14:04,204 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 18:14:04,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 18:14:04,204 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 18:14:04,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 18:14:04,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 18:14:04,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 18:14:04,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 18:14:04,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 18:14:04,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 18:14:04,205 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 18:14:04,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 18:14:04,206 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 18:14:04,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 18:14:04,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 18:14:04,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 18:14:04,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 18:14:04,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 18:14:04,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 18:14:04,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 18:14:04,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 18:14:04,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 18:14:04,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 18:14:04,208 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 18:14:04,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 18:14:04,208 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 18:14:04,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 18:14:04,208 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 18:14:04,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 001066cca5a67e3c9af1d254dd4dcabba7e6cff5ea24a6e35ddcc570894db37c [2023-02-17 18:14:04,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 18:14:04,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 18:14:04,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 18:14:04,430 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 18:14:04,431 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 18:14:04,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i [2023-02-17 18:14:05,430 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 18:14:05,648 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 18:14:05,648 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i [2023-02-17 18:14:05,652 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcc35359f/5d24917fe6c444529d5970fceaf177cc/FLAG150d723a0 [2023-02-17 18:14:06,060 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcc35359f/5d24917fe6c444529d5970fceaf177cc [2023-02-17 18:14:06,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 18:14:06,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 18:14:06,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 18:14:06,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 18:14:06,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 18:14:06,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:14:06" (1/1) ... [2023-02-17 18:14:06,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7029ef0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:06, skipping insertion in model container [2023-02-17 18:14:06,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:14:06" (1/1) ... [2023-02-17 18:14:06,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 18:14:06,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 18:14:06,268 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i[816,829] [2023-02-17 18:14:06,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 18:14:06,307 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 18:14:06,317 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i[816,829] [2023-02-17 18:14:06,338 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 18:14:06,366 INFO L208 MainTranslator]: Completed translation [2023-02-17 18:14:06,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:06 WrapperNode [2023-02-17 18:14:06,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 18:14:06,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 18:14:06,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 18:14:06,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 18:14:06,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:06" (1/1) ... [2023-02-17 18:14:06,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:06" (1/1) ... [2023-02-17 18:14:06,410 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-02-17 18:14:06,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 18:14:06,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 18:14:06,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 18:14:06,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 18:14:06,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:06" (1/1) ... [2023-02-17 18:14:06,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:06" (1/1) ... [2023-02-17 18:14:06,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:06" (1/1) ... [2023-02-17 18:14:06,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:06" (1/1) ... [2023-02-17 18:14:06,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:06" (1/1) ... [2023-02-17 18:14:06,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:06" (1/1) ... [2023-02-17 18:14:06,449 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:06" (1/1) ... [2023-02-17 18:14:06,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:06" (1/1) ... [2023-02-17 18:14:06,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 18:14:06,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 18:14:06,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 18:14:06,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 18:14:06,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:06" (1/1) ... [2023-02-17 18:14:06,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 18:14:06,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:06,508 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 18:14:06,510 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 18:14:06,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 18:14:06,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 18:14:06,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 18:14:06,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 18:14:06,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 18:14:06,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 18:14:06,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 18:14:06,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 18:14:06,627 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 18:14:06,629 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 18:14:06,729 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 18:14:06,733 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 18:14:06,733 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-17 18:14:06,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:14:06 BoogieIcfgContainer [2023-02-17 18:14:06,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 18:14:06,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 18:14:06,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 18:14:06,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 18:14:06,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 06:14:06" (1/3) ... [2023-02-17 18:14:06,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d749e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:14:06, skipping insertion in model container [2023-02-17 18:14:06,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:06" (2/3) ... [2023-02-17 18:14:06,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d749e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:14:06, skipping insertion in model container [2023-02-17 18:14:06,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:14:06" (3/3) ... [2023-02-17 18:14:06,740 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2023-02-17 18:14:06,753 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 18:14:06,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 18:14:06,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 18:14:06,800 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;@6241d138, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 18:14:06,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 18:14:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 18:14:06,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 18:14:06,808 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:06,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:14:06,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:06,813 INFO L85 PathProgramCache]: Analyzing trace with hash -779788197, now seen corresponding path program 1 times [2023-02-17 18:14:06,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:06,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046221998] [2023-02-17 18:14:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:06,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:07,028 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 18:14:07,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:07,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046221998] [2023-02-17 18:14:07,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046221998] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:07,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 18:14:07,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 18:14:07,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558423551] [2023-02-17 18:14:07,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:07,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 18:14:07,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:07,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 18:14:07,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 18:14:07,059 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 18:14:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:07,089 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2023-02-17 18:14:07,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 18:14:07,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-17 18:14:07,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:07,096 INFO L225 Difference]: With dead ends: 40 [2023-02-17 18:14:07,096 INFO L226 Difference]: Without dead ends: 19 [2023-02-17 18:14:07,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 18:14:07,100 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:07,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:07,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-17 18:14:07,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-02-17 18:14:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 18:14:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-02-17 18:14:07,140 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2023-02-17 18:14:07,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:07,141 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-02-17 18:14:07,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 18:14:07,141 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-02-17 18:14:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 18:14:07,157 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:07,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:14:07,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 18:14:07,158 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:07,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:07,158 INFO L85 PathProgramCache]: Analyzing trace with hash 383923737, now seen corresponding path program 1 times [2023-02-17 18:14:07,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:07,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970533299] [2023-02-17 18:14:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:07,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:07,284 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 18:14:07,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:07,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970533299] [2023-02-17 18:14:07,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970533299] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:07,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899325744] [2023-02-17 18:14:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:07,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:07,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:07,317 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 18:14:07,340 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 18:14:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-17 18:14:07,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 18:14:07,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 18:14:07,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899325744] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:07,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 18:14:07,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-17 18:14:07,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238067759] [2023-02-17 18:14:07,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:07,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 18:14:07,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:07,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 18:14:07,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 18:14:07,416 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 18:14:07,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:07,431 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-02-17 18:14:07,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 18:14:07,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2023-02-17 18:14:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:07,444 INFO L225 Difference]: With dead ends: 32 [2023-02-17 18:14:07,444 INFO L226 Difference]: Without dead ends: 22 [2023-02-17 18:14:07,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 18:14:07,445 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:07,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:07,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-17 18:14:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-02-17 18:14:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 18:14:07,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-02-17 18:14:07,449 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2023-02-17 18:14:07,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:07,450 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-02-17 18:14:07,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 18:14:07,450 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-02-17 18:14:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 18:14:07,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:07,450 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 18:14:07,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 18:14:07,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:07,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:07,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:07,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1602849365, now seen corresponding path program 1 times [2023-02-17 18:14:07,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:07,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68809235] [2023-02-17 18:14:07,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:07,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 18:14:07,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:07,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68809235] [2023-02-17 18:14:07,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68809235] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:07,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447286565] [2023-02-17 18:14:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:07,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:07,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:07,759 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 18:14:07,761 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 18:14:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:07,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 18:14:07,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 18:14:07,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:14:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 18:14:07,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447286565] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:14:07,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:14:07,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-17 18:14:07,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765397860] [2023-02-17 18:14:07,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:14:07,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 18:14:07,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:07,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 18:14:07,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-17 18:14:07,832 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 18:14:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:07,850 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-02-17 18:14:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 18:14:07,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 17 [2023-02-17 18:14:07,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:07,851 INFO L225 Difference]: With dead ends: 41 [2023-02-17 18:14:07,851 INFO L226 Difference]: Without dead ends: 26 [2023-02-17 18:14:07,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-17 18:14:07,853 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:07,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:07,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-17 18:14:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-17 18:14:07,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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 18:14:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-02-17 18:14:07,856 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2023-02-17 18:14:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:07,857 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-02-17 18:14:07,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 18:14:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-02-17 18:14:07,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 18:14:07,858 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:07,858 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:14:07,888 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 18:14:08,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-17 18:14:08,061 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:08,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:08,062 INFO L85 PathProgramCache]: Analyzing trace with hash 862458255, now seen corresponding path program 2 times [2023-02-17 18:14:08,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:08,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354995542] [2023-02-17 18:14:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:08,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 18:14:08,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:08,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354995542] [2023-02-17 18:14:08,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354995542] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:08,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987251910] [2023-02-17 18:14:08,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 18:14:08,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:08,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:08,152 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 18:14:08,154 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 18:14:08,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 18:14:08,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:14:08,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 18:14:08,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 18:14:08,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:14:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 18:14:08,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987251910] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:14:08,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:14:08,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-17 18:14:08,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849188281] [2023-02-17 18:14:08,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:14:08,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 18:14:08,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:08,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 18:14:08,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-17 18:14:08,271 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 18:14:08,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:08,315 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2023-02-17 18:14:08,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 18:14:08,316 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 18:14:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:08,317 INFO L225 Difference]: With dead ends: 49 [2023-02-17 18:14:08,317 INFO L226 Difference]: Without dead ends: 38 [2023-02-17 18:14:08,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-17 18:14:08,320 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:08,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 60 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-17 18:14:08,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-02-17 18:14:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 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 18:14:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-02-17 18:14:08,336 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 23 [2023-02-17 18:14:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:08,338 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-02-17 18:14:08,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 18:14:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-02-17 18:14:08,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-17 18:14:08,340 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:08,340 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:14:08,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 18:14:08,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:08,548 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:08,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:08,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1441156285, now seen corresponding path program 3 times [2023-02-17 18:14:08,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:08,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961739127] [2023-02-17 18:14:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:08,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-17 18:14:08,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:08,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961739127] [2023-02-17 18:14:08,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961739127] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:08,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138461383] [2023-02-17 18:14:08,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 18:14:08,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:08,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:08,649 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 18:14:08,650 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 18:14:08,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-17 18:14:08,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:14:08,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 18:14:08,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-17 18:14:08,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:14:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-17 18:14:08,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138461383] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:14:08,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:14:08,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-17 18:14:08,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647458974] [2023-02-17 18:14:08,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:14:08,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 18:14:08,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:08,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 18:14:08,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-17 18:14:08,815 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 18:14:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:08,846 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2023-02-17 18:14:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 18:14:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-17 18:14:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:08,848 INFO L225 Difference]: With dead ends: 77 [2023-02-17 18:14:08,848 INFO L226 Difference]: Without dead ends: 50 [2023-02-17 18:14:08,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-17 18:14:08,849 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 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 18:14:08,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-17 18:14:08,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-17 18:14:08,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 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 18:14:08,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2023-02-17 18:14:08,859 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 35 [2023-02-17 18:14:08,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:08,859 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2023-02-17 18:14:08,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 18:14:08,860 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2023-02-17 18:14:08,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-17 18:14:08,862 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:08,862 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:14:08,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 18:14:09,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:09,068 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:09,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:09,069 INFO L85 PathProgramCache]: Analyzing trace with hash -100034249, now seen corresponding path program 4 times [2023-02-17 18:14:09,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:09,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478549898] [2023-02-17 18:14:09,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:09,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-17 18:14:09,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:09,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478549898] [2023-02-17 18:14:09,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478549898] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:09,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932733482] [2023-02-17 18:14:09,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 18:14:09,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:09,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:09,274 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 18:14:09,276 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 18:14:09,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 18:14:09,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:14:09,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 18:14:09,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-17 18:14:09,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:14:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-17 18:14:09,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932733482] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:14:09,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:14:09,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-17 18:14:09,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949296215] [2023-02-17 18:14:09,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:14:09,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 18:14:09,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:09,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 18:14:09,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-17 18:14:09,555 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 18:14:09,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:09,607 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2023-02-17 18:14:09,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 18:14:09,608 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-17 18:14:09,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:09,608 INFO L225 Difference]: With dead ends: 101 [2023-02-17 18:14:09,609 INFO L226 Difference]: Without dead ends: 74 [2023-02-17 18:14:09,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-17 18:14:09,610 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:09,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-17 18:14:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-02-17 18:14:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 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 18:14:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2023-02-17 18:14:09,614 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 47 [2023-02-17 18:14:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:09,614 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2023-02-17 18:14:09,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 18:14:09,615 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2023-02-17 18:14:09,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-17 18:14:09,615 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:09,615 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:14:09,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 18:14:09,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:09,826 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:09,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:09,826 INFO L85 PathProgramCache]: Analyzing trace with hash -888767713, now seen corresponding path program 5 times [2023-02-17 18:14:09,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:09,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168019067] [2023-02-17 18:14:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:09,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-17 18:14:10,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:10,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168019067] [2023-02-17 18:14:10,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168019067] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:10,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353497930] [2023-02-17 18:14:10,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 18:14:10,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:10,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:10,311 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 18:14:10,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process