./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/recHanoi03-2.c --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/recursive/recHanoi03-2.c -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 6256a35b65d93a8e45ad38c9510c3be689a890aeee58265a5723be13a7385a72 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 04:20:49,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 04:20:49,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 04:20:49,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 04:20:49,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 04:20:49,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 04:20:49,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 04:20:49,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 04:20:49,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 04:20:49,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 04:20:49,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 04:20:49,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 04:20:49,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 04:20:49,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 04:20:49,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 04:20:49,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 04:20:49,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 04:20:49,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 04:20:49,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 04:20:49,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 04:20:49,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 04:20:49,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 04:20:49,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 04:20:49,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 04:20:49,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 04:20:49,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 04:20:49,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 04:20:49,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 04:20:49,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 04:20:49,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 04:20:49,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 04:20:49,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 04:20:49,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 04:20:49,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 04:20:49,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 04:20:49,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 04:20:49,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 04:20:49,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 04:20:49,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 04:20:49,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 04:20:49,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 04:20:49,582 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 04:20:49,594 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 04:20:49,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 04:20:49,595 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 04:20:49,595 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 04:20:49,596 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 04:20:49,596 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 04:20:49,596 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 04:20:49,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 04:20:49,596 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 04:20:49,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 04:20:49,597 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 04:20:49,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 04:20:49,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 04:20:49,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 04:20:49,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 04:20:49,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 04:20:49,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 04:20:49,598 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 04:20:49,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 04:20:49,598 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 04:20:49,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 04:20:49,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 04:20:49,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 04:20:49,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 04:20:49,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 04:20:49,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 04:20:49,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 04:20:49,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 04:20:49,600 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 04:20:49,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 04:20:49,600 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 04:20:49,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 04:20:49,600 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 04:20:49,600 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 04:20:49,601 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 04:20:49,601 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6256a35b65d93a8e45ad38c9510c3be689a890aeee58265a5723be13a7385a72 [2023-02-18 04:20:49,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 04:20:49,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 04:20:49,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 04:20:49,791 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 04:20:49,791 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 04:20:49,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/recHanoi03-2.c [2023-02-18 04:20:50,770 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 04:20:50,884 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 04:20:50,884 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/recHanoi03-2.c [2023-02-18 04:20:50,888 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dbfad67b/61b42e007a604cb9b75b5f9b6c0c63a6/FLAGbd30253d6 [2023-02-18 04:20:50,897 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dbfad67b/61b42e007a604cb9b75b5f9b6c0c63a6 [2023-02-18 04:20:50,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 04:20:50,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 04:20:50,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 04:20:50,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 04:20:50,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 04:20:50,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:20:50" (1/1) ... [2023-02-18 04:20:50,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52d84036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:20:50, skipping insertion in model container [2023-02-18 04:20:50,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:20:50" (1/1) ... [2023-02-18 04:20:50,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 04:20:50,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 04:20:50,998 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/recursive/recHanoi03-2.c[769,782] [2023-02-18 04:20:51,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 04:20:51,007 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 04:20:51,015 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/recursive/recHanoi03-2.c[769,782] [2023-02-18 04:20:51,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 04:20:51,024 INFO L208 MainTranslator]: Completed translation [2023-02-18 04:20:51,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:20:51 WrapperNode [2023-02-18 04:20:51,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 04:20:51,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 04:20:51,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 04:20:51,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 04:20:51,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:20:51" (1/1) ... [2023-02-18 04:20:51,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:20:51" (1/1) ... [2023-02-18 04:20:51,045 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2023-02-18 04:20:51,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 04:20:51,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 04:20:51,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 04:20:51,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 04:20:51,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:20:51" (1/1) ... [2023-02-18 04:20:51,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:20:51" (1/1) ... [2023-02-18 04:20:51,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:20:51" (1/1) ... [2023-02-18 04:20:51,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:20:51" (1/1) ... [2023-02-18 04:20:51,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:20:51" (1/1) ... [2023-02-18 04:20:51,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:20:51" (1/1) ... [2023-02-18 04:20:51,055 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:20:51" (1/1) ... [2023-02-18 04:20:51,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:20:51" (1/1) ... [2023-02-18 04:20:51,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 04:20:51,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 04:20:51,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 04:20:51,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 04:20:51,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:20:51" (1/1) ... [2023-02-18 04:20:51,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 04:20:51,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:20:51,076 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) [2023-02-18 04:20:51,093 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 [2023-02-18 04:20:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 04:20:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2023-02-18 04:20:51,105 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2023-02-18 04:20:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 04:20:51,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 04:20:51,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 04:20:51,149 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 04:20:51,151 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 04:20:51,254 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 04:20:51,259 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 04:20:51,259 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-18 04:20:51,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:20:51 BoogieIcfgContainer [2023-02-18 04:20:51,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 04:20:51,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 04:20:51,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 04:20:51,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 04:20:51,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 04:20:50" (1/3) ... [2023-02-18 04:20:51,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d24e872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:20:51, skipping insertion in model container [2023-02-18 04:20:51,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:20:51" (2/3) ... [2023-02-18 04:20:51,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d24e872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:20:51, skipping insertion in model container [2023-02-18 04:20:51,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:20:51" (3/3) ... [2023-02-18 04:20:51,272 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2023-02-18 04:20:51,296 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 04:20:51,296 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 04:20:51,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 04:20:51,339 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;@64649083, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 04:20:51,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 04:20:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 04:20:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 04:20:51,347 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:20:51,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:20:51,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:20:51,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:20:51,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2023-02-18 04:20:51,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:20:51,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506259379] [2023-02-18 04:20:51,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:20:51,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:20:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:51,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 04:20:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 04:20:51,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:20:51,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506259379] [2023-02-18 04:20:51,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506259379] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 04:20:51,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 04:20:51,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 04:20:51,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528068803] [2023-02-18 04:20:51,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 04:20:51,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 04:20:51,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:20:51,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 04:20:51,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 04:20:51,679 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 04:20:51,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:20:51,776 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-02-18 04:20:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 04:20:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-02-18 04:20:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:20:51,784 INFO L225 Difference]: With dead ends: 29 [2023-02-18 04:20:51,785 INFO L226 Difference]: Without dead ends: 16 [2023-02-18 04:20:51,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 04:20:51,792 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 04:20:51,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 52 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 04:20:51,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-02-18 04:20:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-02-18 04:20:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 04:20:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-02-18 04:20:51,820 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2023-02-18 04:20:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:20:51,821 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-02-18 04:20:51,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 04:20:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-02-18 04:20:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 04:20:51,822 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:20:51,823 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:20:51,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 04:20:51,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:20:51,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:20:51,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2023-02-18 04:20:51,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:20:51,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770877288] [2023-02-18 04:20:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:20:51,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:20:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:51,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 04:20:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:52,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 04:20:52,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:20:52,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770877288] [2023-02-18 04:20:52,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770877288] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:20:52,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796481404] [2023-02-18 04:20:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:20:52,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:20:52,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:20:52,042 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) [2023-02-18 04:20:52,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 04:20:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:52,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 04:20:52,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:20:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 04:20:52,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:20:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 04:20:52,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796481404] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 04:20:52,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 04:20:52,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2023-02-18 04:20:52,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247050832] [2023-02-18 04:20:52,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 04:20:52,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 04:20:52,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:20:52,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 04:20:52,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-02-18 04:20:52,398 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 04:20:52,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:20:52,502 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2023-02-18 04:20:52,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 04:20:52,502 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 17 [2023-02-18 04:20:52,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:20:52,503 INFO L225 Difference]: With dead ends: 28 [2023-02-18 04:20:52,503 INFO L226 Difference]: Without dead ends: 22 [2023-02-18 04:20:52,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-02-18 04:20:52,505 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 04:20:52,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 66 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 04:20:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-18 04:20:52,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-18 04:20:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 04:20:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-02-18 04:20:52,510 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2023-02-18 04:20:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:20:52,511 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-02-18 04:20:52,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-18 04:20:52,511 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-02-18 04:20:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 04:20:52,512 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:20:52,512 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:20:52,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 04:20:52,717 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 [2023-02-18 04:20:52,718 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:20:52,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:20:52,718 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2023-02-18 04:20:52,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:20:52,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918186050] [2023-02-18 04:20:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:20:52,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:20:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:52,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 04:20:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:52,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:52,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:52,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 04:20:53,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:20:53,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918186050] [2023-02-18 04:20:53,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918186050] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:20:53,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329587276] [2023-02-18 04:20:53,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 04:20:53,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:20:53,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:20:53,006 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) [2023-02-18 04:20:53,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 04:20:53,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 04:20:53,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:20:53,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 04:20:53,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:20:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 04:20:53,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:20:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 04:20:53,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329587276] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 04:20:53,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 04:20:53,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15] total 30 [2023-02-18 04:20:53,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714562553] [2023-02-18 04:20:53,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 04:20:53,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 04:20:53,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:20:53,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 04:20:53,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2023-02-18 04:20:53,438 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 20 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-18 04:20:53,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:20:53,617 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2023-02-18 04:20:53,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 04:20:53,618 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 20 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) Word has length 29 [2023-02-18 04:20:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:20:53,618 INFO L225 Difference]: With dead ends: 37 [2023-02-18 04:20:53,618 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 04:20:53,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 04:20:53,620 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 04:20:53,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 144 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 04:20:53,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 04:20:53,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-18 04:20:53,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 04:20:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-02-18 04:20:53,624 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2023-02-18 04:20:53,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:20:53,624 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-02-18 04:20:53,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 20 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 9 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-18 04:20:53,624 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-02-18 04:20:53,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 04:20:53,625 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:20:53,625 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:20:53,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 04:20:53,837 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 [2023-02-18 04:20:53,837 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:20:53,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:20:53,837 INFO L85 PathProgramCache]: Analyzing trace with hash 278928068, now seen corresponding path program 3 times [2023-02-18 04:20:53,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:20:53,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284814114] [2023-02-18 04:20:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:20:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:20:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:53,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 04:20:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:54,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:54,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:54,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:54,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:54,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:54,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-18 04:20:54,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:20:54,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284814114] [2023-02-18 04:20:54,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284814114] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:20:54,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154415635] [2023-02-18 04:20:54,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 04:20:54,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:20:54,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:20:54,300 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) [2023-02-18 04:20:54,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 04:20:54,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-18 04:20:54,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:20:54,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 04:20:54,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:20:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-18 04:20:54,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:20:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 04:20:55,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154415635] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 04:20:55,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 04:20:55,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 24] total 45 [2023-02-18 04:20:55,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774645693] [2023-02-18 04:20:55,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 04:20:55,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-18 04:20:55,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:20:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-18 04:20:55,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 04:20:55,235 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 29 states have internal predecessors, (58), 9 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) [2023-02-18 04:20:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:20:55,641 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-02-18 04:20:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 04:20:55,642 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 29 states have internal predecessors, (58), 9 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) Word has length 47 [2023-02-18 04:20:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:20:55,643 INFO L225 Difference]: With dead ends: 55 [2023-02-18 04:20:55,643 INFO L226 Difference]: Without dead ends: 49 [2023-02-18 04:20:55,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 62 SyntacticMatches, 18 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=3944, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 04:20:55,645 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 84 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 04:20:55,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 244 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 04:20:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-18 04:20:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-02-18 04:20:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2023-02-18 04:20:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-02-18 04:20:55,658 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2023-02-18 04:20:55,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:20:55,658 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-02-18 04:20:55,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.288888888888889) internal successors, (58), 29 states have internal predecessors, (58), 9 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (21), 16 states have call predecessors, (21), 9 states have call successors, (21) [2023-02-18 04:20:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-02-18 04:20:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-02-18 04:20:55,662 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:20:55,662 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:20:55,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 04:20:55,866 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 [2023-02-18 04:20:55,867 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:20:55,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:20:55,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2030797316, now seen corresponding path program 4 times [2023-02-18 04:20:55,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:20:55,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623230492] [2023-02-18 04:20:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:20:55,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:20:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:56,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 04:20:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:56,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:56,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:56,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:56,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:56,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:56,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:56,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:56,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:56,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:56,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:57,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:57,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:20:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:20:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-02-18 04:20:57,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:20:57,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623230492] [2023-02-18 04:20:57,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623230492] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:20:57,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855301465] [2023-02-18 04:20:57,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 04:20:57,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:20:57,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:20:57,111 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) [2023-02-18 04:20:57,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 04:20:57,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 04:20:57,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:20:57,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-18 04:20:57,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:20:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-02-18 04:20:57,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:20:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-18 04:20:59,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855301465] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 04:20:59,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 04:20:59,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 42] total 75 [2023-02-18 04:20:59,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66420935] [2023-02-18 04:20:59,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 04:20:59,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-02-18 04:20:59,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:20:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-02-18 04:20:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=5001, Unknown=0, NotChecked=0, Total=5550 [2023-02-18 04:20:59,818 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 75 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 47 states have internal predecessors, (94), 15 states have call successors, (15), 1 states have call predecessors, (15), 27 states have return successors, (39), 28 states have call predecessors, (39), 15 states have call successors, (39) [2023-02-18 04:21:01,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:21:01,022 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2023-02-18 04:21:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-18 04:21:01,023 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 47 states have internal predecessors, (94), 15 states have call successors, (15), 1 states have call predecessors, (15), 27 states have return successors, (39), 28 states have call predecessors, (39), 15 states have call successors, (39) Word has length 83 [2023-02-18 04:21:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:21:01,029 INFO L225 Difference]: With dead ends: 91 [2023-02-18 04:21:01,029 INFO L226 Difference]: Without dead ends: 85 [2023-02-18 04:21:01,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 110 SyntacticMatches, 36 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3858 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1830, Invalid=12932, Unknown=0, NotChecked=0, Total=14762 [2023-02-18 04:21:01,036 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 232 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 04:21:01,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 728 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 04:21:01,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-18 04:21:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-02-18 04:21:01,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 58 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2023-02-18 04:21:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-02-18 04:21:01,055 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2023-02-18 04:21:01,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:21:01,056 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-02-18 04:21:01,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 47 states have internal predecessors, (94), 15 states have call successors, (15), 1 states have call predecessors, (15), 27 states have return successors, (39), 28 states have call predecessors, (39), 15 states have call successors, (39) [2023-02-18 04:21:01,056 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-02-18 04:21:01,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-02-18 04:21:01,058 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:21:01,059 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:21:01,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 04:21:01,263 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 [2023-02-18 04:21:01,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:21:01,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:21:01,264 INFO L85 PathProgramCache]: Analyzing trace with hash -341184380, now seen corresponding path program 5 times [2023-02-18 04:21:01,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:21:01,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49593871] [2023-02-18 04:21:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:21:01,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:21:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:01,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 04:21:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:02,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:02,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:02,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:03,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:03,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:03,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:03,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:04,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:04,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:04,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:04,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:04,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:05,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:05,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:05,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:05,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:05,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:05,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:05,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:05,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:05,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:05,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:06,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:06,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 04:21:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:21:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2023-02-18 04:21:06,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:21:06,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49593871] [2023-02-18 04:21:06,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49593871] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:21:06,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106149630] [2023-02-18 04:21:06,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 04:21:06,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:21:06,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:21:06,188 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) [2023-02-18 04:21:06,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 04:21:06,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-02-18 04:21:06,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:21:06,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-18 04:21:06,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:21:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 876 proven. 0 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2023-02-18 04:21:09,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 04:21:09,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106149630] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 04:21:09,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:21:09,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [54] total 106 [2023-02-18 04:21:09,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761881160] [2023-02-18 04:21:09,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 04:21:09,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-18 04:21:09,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:21:09,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-18 04:21:09,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=789, Invalid=10341, Unknown=0, NotChecked=0, Total=11130 [2023-02-18 04:21:09,014 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 29 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) [2023-02-18 04:21:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:21:09,209 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2023-02-18 04:21:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-18 04:21:09,210 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 29 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) Word has length 155 [2023-02-18 04:21:09,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:21:09,211 INFO L225 Difference]: With dead ends: 85 [2023-02-18 04:21:09,211 INFO L226 Difference]: Without dead ends: 0 [2023-02-18 04:21:09,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=789, Invalid=10341, Unknown=0, NotChecked=0, Total=11130 [2023-02-18 04:21:09,214 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 04:21:09,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 443 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 04:21:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-18 04:21:09,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-18 04:21:09,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-02-18 04:21:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-18 04:21:09,216 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 155 [2023-02-18 04:21:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:21:09,216 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-18 04:21:09,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 29 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) [2023-02-18 04:21:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-18 04:21:09,216 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-18 04:21:09,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-18 04:21:09,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 04:21:09,424 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 [2023-02-18 04:21:09,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-18 04:21:09,429 INFO L899 garLoopResultBuilder]: For program point hanoiEXIT(lines 18 23) no Hoare annotation was computed. [2023-02-18 04:21:09,429 INFO L899 garLoopResultBuilder]: For program point hanoiFINAL(lines 18 23) no Hoare annotation was computed. [2023-02-18 04:21:09,429 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 18 23) the Hoare annotation is: true [2023-02-18 04:21:09,429 INFO L895 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (= hanoi_~n |hanoi_#in~n|) [2023-02-18 04:21:09,429 INFO L899 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2023-02-18 04:21:09,429 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 21) no Hoare annotation was computed. [2023-02-18 04:21:09,429 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-18 04:21:09,429 INFO L899 garLoopResultBuilder]: For program point L32(lines 32 36) no Hoare annotation was computed. [2023-02-18 04:21:09,429 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-18 04:21:09,429 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (not (> |ULTIMATE.start_main_~n~0#1| 31)) [2023-02-18 04:21:09,429 INFO L899 garLoopResultBuilder]: For program point L31-1(line 31) no Hoare annotation was computed. [2023-02-18 04:21:09,429 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-18 04:21:09,430 INFO L899 garLoopResultBuilder]: For program point L28(lines 28 30) no Hoare annotation was computed. [2023-02-18 04:21:09,430 INFO L902 garLoopResultBuilder]: At program point L26(lines 26 37) the Hoare annotation is: true [2023-02-18 04:21:09,430 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2023-02-18 04:21:09,430 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-18 04:21:09,430 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2023-02-18 04:21:09,435 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1] [2023-02-18 04:21:09,438 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 04:21:09,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 04:21:09 BoogieIcfgContainer [2023-02-18 04:21:09,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 04:21:09,447 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 04:21:09,448 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 04:21:09,448 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 04:21:09,448 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:20:51" (3/4) ... [2023-02-18 04:21:09,451 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-18 04:21:09,456 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure hanoi [2023-02-18 04:21:09,459 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-02-18 04:21:09,459 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-02-18 04:21:09,459 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-18 04:21:09,459 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-18 04:21:09,480 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-18 04:21:09,480 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 04:21:09,481 INFO L158 Benchmark]: Toolchain (without parser) took 18580.44ms. Allocated memory was 153.1MB in the beginning and 698.4MB in the end (delta: 545.3MB). Free memory was 104.7MB in the beginning and 414.1MB in the end (delta: -309.4MB). Peak memory consumption was 237.7MB. Max. memory is 16.1GB. [2023-02-18 04:21:09,481 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 94.4MB. Free memory is still 41.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 04:21:09,482 INFO L158 Benchmark]: CACSL2BoogieTranslator took 123.89ms. Allocated memory is still 153.1MB. Free memory was 104.7MB in the beginning and 94.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 04:21:09,482 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.67ms. Allocated memory is still 153.1MB. Free memory was 94.7MB in the beginning and 93.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 04:21:09,482 INFO L158 Benchmark]: Boogie Preprocessor took 10.68ms. Allocated memory is still 153.1MB. Free memory was 93.4MB in the beginning and 92.5MB in the end (delta: 922.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 04:21:09,482 INFO L158 Benchmark]: RCFGBuilder took 207.46ms. Allocated memory is still 153.1MB. Free memory was 92.5MB in the beginning and 83.0MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 04:21:09,483 INFO L158 Benchmark]: TraceAbstraction took 18181.35ms. Allocated memory was 153.1MB in the beginning and 698.4MB in the end (delta: 545.3MB). Free memory was 82.6MB in the beginning and 417.3MB in the end (delta: -334.7MB). Peak memory consumption was 212.5MB. Max. memory is 16.1GB. [2023-02-18 04:21:09,483 INFO L158 Benchmark]: Witness Printer took 32.78ms. Allocated memory is still 698.4MB. Free memory was 417.3MB in the beginning and 414.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 04:21:09,484 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 94.4MB. Free memory is still 41.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 123.89ms. Allocated memory is still 153.1MB. Free memory was 104.7MB in the beginning and 94.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.67ms. Allocated memory is still 153.1MB. Free memory was 94.7MB in the beginning and 93.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 10.68ms. Allocated memory is still 153.1MB. Free memory was 93.4MB in the beginning and 92.5MB in the end (delta: 922.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 207.46ms. Allocated memory is still 153.1MB. Free memory was 92.5MB in the beginning and 83.0MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 18181.35ms. Allocated memory was 153.1MB in the beginning and 698.4MB in the end (delta: 545.3MB). Free memory was 82.6MB in the beginning and 417.3MB in the end (delta: -334.7MB). Peak memory consumption was 212.5MB. Max. memory is 16.1GB. * Witness Printer took 32.78ms. Allocated memory is still 698.4MB. Free memory was 417.3MB in the beginning and 414.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 35]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 18.1s, OverallIterations: 6, TraceHistogramMax: 25, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 401 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 350 mSDsluCounter, 1677 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1545 mSDsCounter, 177 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2512 IncrementalHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 177 mSolverCounterUnsat, 132 mSDtfsCounter, 2512 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 811 GetRequests, 388 SyntacticMatches, 66 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6143 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=5, InterpolantAutomatonStates: 174, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 6 PreInvPairs, 8 NumberOfFragments, 9 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 13.9s InterpolantComputationTime, 673 NumberOfCodeBlocks, 673 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 834 ConstructedInterpolants, 0 QuantifiedInterpolants, 3945 SizeOfPredicates, 40 NumberOfNonLiveVariables, 884 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 3326/5280 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2023-02-18 04:21:09,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE