./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_05.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_two_index_05.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 3fc114fbbcfc36c9c941771d8fca06798b1529d5817554239fb5f8a03a84a489 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 18:43:54,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 18:43:54,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 18:43:54,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 18:43:54,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 18:43:54,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 18:43:54,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 18:43:54,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 18:43:54,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 18:43:54,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 18:43:54,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 18:43:54,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 18:43:54,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 18:43:54,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 18:43:54,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 18:43:54,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 18:43:54,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 18:43:54,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 18:43:54,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 18:43:54,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 18:43:54,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 18:43:54,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 18:43:54,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 18:43:54,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 18:43:54,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 18:43:54,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 18:43:54,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 18:43:54,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 18:43:54,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 18:43:54,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 18:43:54,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 18:43:54,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 18:43:54,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 18:43:54,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 18:43:54,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 18:43:54,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 18:43:54,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 18:43:54,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 18:43:54,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 18:43:54,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 18:43:54,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 18:43:54,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 18:43:54,306 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 18:43:54,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 18:43:54,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 18:43:54,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 18:43:54,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 18:43:54,308 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 18:43:54,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 18:43:54,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 18:43:54,308 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 18:43:54,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 18:43:54,309 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 18:43:54,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 18:43:54,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 18:43:54,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 18:43:54,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 18:43:54,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 18:43:54,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 18:43:54,310 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 18:43:54,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 18:43:54,310 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 18:43:54,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 18:43:54,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 18:43:54,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 18:43:54,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 18:43:54,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 18:43:54,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 18:43:54,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 18:43:54,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 18:43:54,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 18:43:54,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 18:43:54,312 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 18:43:54,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 18:43:54,312 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 18:43:54,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 18:43:54,312 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 18:43:54,312 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fc114fbbcfc36c9c941771d8fca06798b1529d5817554239fb5f8a03a84a489 [2023-02-17 18:43:54,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 18:43:54,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 18:43:54,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 18:43:54,503 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 18:43:54,503 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 18:43:54,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_05.i [2023-02-17 18:43:55,658 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 18:43:55,808 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 18:43:55,808 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_05.i [2023-02-17 18:43:55,812 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73ecde9a8/f12e17d71f734fcaab17bdbf88c586d1/FLAG309727c90 [2023-02-17 18:43:55,824 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73ecde9a8/f12e17d71f734fcaab17bdbf88c586d1 [2023-02-17 18:43:55,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 18:43:55,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 18:43:55,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 18:43:55,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 18:43:55,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 18:43:55,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:43:55" (1/1) ... [2023-02-17 18:43:55,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@386802ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:43:55, skipping insertion in model container [2023-02-17 18:43:55,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:43:55" (1/1) ... [2023-02-17 18:43:55,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 18:43:55,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 18:43:55,948 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_two_index_05.i[814,827] [2023-02-17 18:43:55,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 18:43:55,960 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 18:43:55,967 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_two_index_05.i[814,827] [2023-02-17 18:43:55,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 18:43:55,980 INFO L208 MainTranslator]: Completed translation [2023-02-17 18:43:55,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:43:55 WrapperNode [2023-02-17 18:43:55,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 18:43:55,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 18:43:55,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 18:43:55,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 18:43:55,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:43:55" (1/1) ... [2023-02-17 18:43:55,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:43:55" (1/1) ... [2023-02-17 18:43:56,001 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-02-17 18:43:56,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 18:43:56,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 18:43:56,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 18:43:56,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 18:43:56,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:43:55" (1/1) ... [2023-02-17 18:43:56,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:43:55" (1/1) ... [2023-02-17 18:43:56,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:43:55" (1/1) ... [2023-02-17 18:43:56,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:43:55" (1/1) ... [2023-02-17 18:43:56,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:43:55" (1/1) ... [2023-02-17 18:43:56,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:43:55" (1/1) ... [2023-02-17 18:43:56,015 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:43:55" (1/1) ... [2023-02-17 18:43:56,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:43:55" (1/1) ... [2023-02-17 18:43:56,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 18:43:56,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 18:43:56,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 18:43:56,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 18:43:56,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:43:55" (1/1) ... [2023-02-17 18:43:56,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 18:43:56,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:43:56,042 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 18:43:56,054 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 18:43:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 18:43:56,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 18:43:56,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 18:43:56,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 18:43:56,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 18:43:56,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 18:43:56,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 18:43:56,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 18:43:56,122 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 18:43:56,123 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 18:43:56,211 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 18:43:56,215 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 18:43:56,215 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-17 18:43:56,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:43:56 BoogieIcfgContainer [2023-02-17 18:43:56,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 18:43:56,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 18:43:56,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 18:43:56,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 18:43:56,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 06:43:55" (1/3) ... [2023-02-17 18:43:56,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612e0205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:43:56, skipping insertion in model container [2023-02-17 18:43:56,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:43:55" (2/3) ... [2023-02-17 18:43:56,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612e0205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:43:56, skipping insertion in model container [2023-02-17 18:43:56,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:43:56" (3/3) ... [2023-02-17 18:43:56,223 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_05.i [2023-02-17 18:43:56,235 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 18:43:56,235 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 18:43:56,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 18:43:56,270 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;@51f7d1d1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 18:43:56,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 18:43:56,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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 18:43:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 18:43:56,277 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:43:56,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:43:56,278 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:43:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:43:56,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2023-02-17 18:43:56,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:43:56,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3444239] [2023-02-17 18:43:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:43:56,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:43:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:43:56,417 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 18:43:56,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:43:56,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3444239] [2023-02-17 18:43:56,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3444239] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:43:56,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 18:43:56,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 18:43:56,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666697414] [2023-02-17 18:43:56,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:43:56,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 18:43:56,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:43:56,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 18:43:56,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 18:43:56,451 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 18:43:56,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:43:56,475 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2023-02-17 18:43:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 18:43:56,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2023-02-17 18:43:56,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:43:56,499 INFO L225 Difference]: With dead ends: 28 [2023-02-17 18:43:56,500 INFO L226 Difference]: Without dead ends: 12 [2023-02-17 18:43:56,501 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 18:43:56,504 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:43:56,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:43:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-17 18:43:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-17 18:43:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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 18:43:56,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-02-17 18:43:56,530 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2023-02-17 18:43:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:43:56,531 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-02-17 18:43:56,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 18:43:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-02-17 18:43:56,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 18:43:56,543 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:43:56,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:43:56,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 18:43:56,544 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:43:56,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:43:56,544 INFO L85 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2023-02-17 18:43:56,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:43:56,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407515054] [2023-02-17 18:43:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:43:56,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:43:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:43:56,644 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 18:43:56,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:43:56,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407515054] [2023-02-17 18:43:56,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407515054] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:43:56,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142531236] [2023-02-17 18:43:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:43:56,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:43:56,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:43:56,649 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 18:43:56,650 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 18:43:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:43:56,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-17 18:43:56,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:43:56,742 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 18:43:56,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 18:43:56,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142531236] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:43:56,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 18:43:56,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-02-17 18:43:56,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803045470] [2023-02-17 18:43:56,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:43:56,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 18:43:56,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:43:56,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 18:43:56,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 18:43:56,752 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 18:43:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:43:56,778 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-02-17 18:43:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 18:43:56,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2023-02-17 18:43:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:43:56,781 INFO L225 Difference]: With dead ends: 24 [2023-02-17 18:43:56,781 INFO L226 Difference]: Without dead ends: 18 [2023-02-17 18:43:56,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 18:43:56,785 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:43:56,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:43:56,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-17 18:43:56,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2023-02-17 18:43:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 18:43:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-17 18:43:56,792 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-02-17 18:43:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:43:56,792 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-17 18:43:56,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 18:43:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-17 18:43:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 18:43:56,793 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:43:56,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:43:56,798 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 18:43:56,998 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 18:43:56,998 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:43:56,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:43:56,999 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2023-02-17 18:43:56,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:43:57,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376666273] [2023-02-17 18:43:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:43:57,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:43:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:43:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 18:43:57,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:43:57,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376666273] [2023-02-17 18:43:57,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376666273] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:43:57,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140815697] [2023-02-17 18:43:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:43:57,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:43:57,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:43:57,090 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 18:43:57,092 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 18:43:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:43:57,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 18:43:57,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:43:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 18:43:57,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:43:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 18:43:57,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140815697] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:43:57,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:43:57,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-17 18:43:57,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316458053] [2023-02-17 18:43:57,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:43:57,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 18:43:57,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:43:57,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 18:43:57,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-17 18:43:57,152 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 18:43:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:43:57,177 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-02-17 18:43:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 18:43:57,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 18:43:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:43:57,178 INFO L225 Difference]: With dead ends: 36 [2023-02-17 18:43:57,178 INFO L226 Difference]: Without dead ends: 27 [2023-02-17 18:43:57,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 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 18:43:57,179 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:43:57,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:43:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-17 18:43:57,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2023-02-17 18:43:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 18:43:57,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-17 18:43:57,183 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2023-02-17 18:43:57,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:43:57,183 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-17 18:43:57,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 18:43:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-17 18:43:57,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 18:43:57,184 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:43:57,184 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:43:57,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 18:43:57,388 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 18:43:57,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:43:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:43:57,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 2 times [2023-02-17 18:43:57,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:43:57,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498470138] [2023-02-17 18:43:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:43:57,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:43:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:43:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 18:43:57,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:43:57,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498470138] [2023-02-17 18:43:57,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498470138] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:43:57,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934103146] [2023-02-17 18:43:57,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 18:43:57,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:43:57,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:43:57,501 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 18:43:57,503 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 18:43:57,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 18:43:57,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:43:57,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 18:43:57,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:43:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 18:43:57,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:43:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 18:43:57,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934103146] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:43:57,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:43:57,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-02-17 18:43:57,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620688685] [2023-02-17 18:43:57,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:43:57,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 18:43:57,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:43:57,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 18:43:57,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2023-02-17 18:43:57,622 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 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 18:43:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:43:57,667 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2023-02-17 18:43:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 18:43:57,667 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 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) Word has length 15 [2023-02-17 18:43:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:43:57,668 INFO L225 Difference]: With dead ends: 57 [2023-02-17 18:43:57,668 INFO L226 Difference]: Without dead ends: 47 [2023-02-17 18:43:57,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2023-02-17 18:43:57,669 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:43:57,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:43:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-17 18:43:57,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2023-02-17 18:43:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 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 18:43:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-02-17 18:43:57,673 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2023-02-17 18:43:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:43:57,674 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-02-17 18:43:57,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 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 18:43:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-02-17 18:43:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 18:43:57,674 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:43:57,675 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:43:57,687 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 18:43:57,881 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 18:43:57,881 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:43:57,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:43:57,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1448090520, now seen corresponding path program 3 times [2023-02-17 18:43:57,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:43:57,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759914114] [2023-02-17 18:43:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:43:57,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:43:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:43:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-17 18:43:58,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:43:58,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759914114] [2023-02-17 18:43:58,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759914114] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:43:58,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060980330] [2023-02-17 18:43:58,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 18:43:58,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:43:58,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:43:58,058 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 18:43:58,059 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 18:43:58,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 18:43:58,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:43:58,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 18:43:58,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:43:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-17 18:43:58,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:43:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-17 18:43:58,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060980330] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:43:58,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:43:58,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-17 18:43:58,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568239328] [2023-02-17 18:43:58,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:43:58,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 18:43:58,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:43:58,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 18:43:58,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-17 18:43:58,171 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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 18:43:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:43:58,228 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2023-02-17 18:43:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 18:43:58,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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 18:43:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:43:58,229 INFO L225 Difference]: With dead ends: 85 [2023-02-17 18:43:58,229 INFO L226 Difference]: Without dead ends: 79 [2023-02-17 18:43:58,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 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 18:43:58,230 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:43:58,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 41 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:43:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-17 18:43:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 33. [2023-02-17 18:43:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 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 18:43:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-02-17 18:43:58,235 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2023-02-17 18:43:58,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:43:58,235 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-02-17 18:43:58,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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 18:43:58,235 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-02-17 18:43:58,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 18:43:58,236 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:43:58,236 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:43:58,253 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 18:43:58,453 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 18:43:58,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:43:58,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:43:58,454 INFO L85 PathProgramCache]: Analyzing trace with hash -798905000, now seen corresponding path program 4 times [2023-02-17 18:43:58,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:43:58,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297106537] [2023-02-17 18:43:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:43:58,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:43:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:43:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-17 18:43:58,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:43:58,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297106537] [2023-02-17 18:43:58,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297106537] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:43:58,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504309216] [2023-02-17 18:43:58,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 18:43:58,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:43:58,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:43:58,629 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 18:43:58,649 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 18:43:58,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 18:43:58,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:43:58,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 18:43:58,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:43:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-17 18:43:58,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:43:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-17 18:43:58,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504309216] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:43:58,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:43:58,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 37 [2023-02-17 18:43:58,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541651879] [2023-02-17 18:43:58,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:43:58,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-17 18:43:58,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:43:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-17 18:43:58,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=665, Invalid=667, Unknown=0, NotChecked=0, Total=1332 [2023-02-17 18:43:58,938 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 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 18:43:59,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:43:59,078 INFO L93 Difference]: Finished difference Result 147 states and 176 transitions. [2023-02-17 18:43:59,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-17 18:43:59,078 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 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 31 [2023-02-17 18:43:59,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:43:59,093 INFO L225 Difference]: With dead ends: 147 [2023-02-17 18:43:59,093 INFO L226 Difference]: Without dead ends: 129 [2023-02-17 18:43:59,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=665, Invalid=667, Unknown=0, NotChecked=0, Total=1332 [2023-02-17 18:43:59,094 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 131 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:43:59,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 83 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 18:43:59,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-17 18:43:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 59. [2023-02-17 18:43:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 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 18:43:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-02-17 18:43:59,099 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 31 [2023-02-17 18:43:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:43:59,099 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-02-17 18:43:59,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 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 18:43:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-02-17 18:43:59,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 18:43:59,100 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:43:59,100 INFO L195 NwaCegarLoop]: trace histogram [34, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:43:59,110 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 18:43:59,300 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 18:43:59,301 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:43:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:43:59,301 INFO L85 PathProgramCache]: Analyzing trace with hash 32443640, now seen corresponding path program 5 times [2023-02-17 18:43:59,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:43:59,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372155845] [2023-02-17 18:43:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:43:59,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:43:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:43:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2023-02-17 18:43:59,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:43:59,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372155845] [2023-02-17 18:43:59,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372155845] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:43:59,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921722570] [2023-02-17 18:43:59,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 18:43:59,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:43:59,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:43:59,593 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 18:43:59,595 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 18:46:41,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-02-17 18:46:41,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:46:41,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-17 18:46:41,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:46:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-17 18:46:41,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:46:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-17 18:46:42,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921722570] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:46:42,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:46:42,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 37, 37] total 81 [2023-02-17 18:46:42,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204308138] [2023-02-17 18:46:42,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:46:42,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-02-17 18:46:42,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:46:42,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-02-17 18:46:42,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3239, Invalid=3241, Unknown=0, NotChecked=0, Total=6480 [2023-02-17 18:46:42,741 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 81 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 81 states have internal predecessors, (99), 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 18:46:43,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:46:43,017 INFO L93 Difference]: Finished difference Result 243 states and 298 transitions. [2023-02-17 18:46:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-02-17 18:46:43,018 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 81 states have internal predecessors, (99), 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 57 [2023-02-17 18:46:43,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:46:43,019 INFO L225 Difference]: With dead ends: 243 [2023-02-17 18:46:43,019 INFO L226 Difference]: Without dead ends: 221 [2023-02-17 18:46:43,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3239, Invalid=3241, Unknown=0, NotChecked=0, Total=6480 [2023-02-17 18:46:43,022 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 419 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 18:46:43,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 117 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 18:46:43,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-02-17 18:46:43,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 111. [2023-02-17 18:46:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 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 18:46:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2023-02-17 18:46:43,044 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 57 [2023-02-17 18:46:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:46:43,045 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2023-02-17 18:46:43,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 81 states have internal predecessors, (99), 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 18:46:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2023-02-17 18:46:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-17 18:46:43,049 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:46:43,049 INFO L195 NwaCegarLoop]: trace histogram [78, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:46:43,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-17 18:46:43,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:46:43,265 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:46:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:46:43,265 INFO L85 PathProgramCache]: Analyzing trace with hash 238281784, now seen corresponding path program 6 times [2023-02-17 18:46:43,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:46:43,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094830611] [2023-02-17 18:46:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:46:43,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:46:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:46:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3334 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2023-02-17 18:46:43,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:46:43,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094830611] [2023-02-17 18:46:43,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094830611] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:46:43,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066949014] [2023-02-17 18:46:43,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 18:46:43,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:46:43,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:46:43,997 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 18:46:43,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process