./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 574ddb4e 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-?-574ddb4 [2023-02-17 07:59:33,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 07:59:33,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 07:59:33,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 07:59:33,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 07:59:33,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 07:59:33,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 07:59:33,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 07:59:33,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 07:59:33,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 07:59:33,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 07:59:33,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 07:59:33,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 07:59:33,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 07:59:33,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 07:59:33,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 07:59:33,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 07:59:33,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 07:59:33,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 07:59:33,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 07:59:33,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 07:59:33,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 07:59:33,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 07:59:33,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 07:59:33,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 07:59:33,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 07:59:33,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 07:59:33,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 07:59:33,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 07:59:33,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 07:59:33,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 07:59:33,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 07:59:33,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 07:59:33,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 07:59:33,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 07:59:33,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 07:59:33,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 07:59:33,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 07:59:33,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 07:59:33,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 07:59:33,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 07:59:33,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 07:59:33,945 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 07:59:33,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 07:59:33,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 07:59:33,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 07:59:33,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 07:59:33,946 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 07:59:33,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 07:59:33,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 07:59:33,947 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 07:59:33,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 07:59:33,947 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 07:59:33,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 07:59:33,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 07:59:33,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 07:59:33,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 07:59:33,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 07:59:33,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 07:59:33,948 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 07:59:33,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 07:59:33,948 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 07:59:33,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 07:59:33,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 07:59:33,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 07:59:33,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 07:59:33,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:59:33,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 07:59:33,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 07:59:33,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 07:59:33,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 07:59:33,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 07:59:33,951 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 07:59:33,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 07:59:33,951 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 07:59:33,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 07:59:33,951 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 07:59:33,952 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6256a35b65d93a8e45ad38c9510c3be689a890aeee58265a5723be13a7385a72 [2023-02-17 07:59:34,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 07:59:34,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 07:59:34,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 07:59:34,196 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 07:59:34,198 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 07:59:34,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/recHanoi03-2.c [2023-02-17 07:59:35,288 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 07:59:35,424 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 07:59:35,425 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/recHanoi03-2.c [2023-02-17 07:59:35,428 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1bdbd57d/91f25c50c6b84ba5b7ed9b351c41a3ca/FLAGae534335b [2023-02-17 07:59:35,439 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1bdbd57d/91f25c50c6b84ba5b7ed9b351c41a3ca [2023-02-17 07:59:35,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 07:59:35,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 07:59:35,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 07:59:35,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 07:59:35,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 07:59:35,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:59:35" (1/1) ... [2023-02-17 07:59:35,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62f37e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:59:35, skipping insertion in model container [2023-02-17 07:59:35,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:59:35" (1/1) ... [2023-02-17 07:59:35,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 07:59:35,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 07:59:35,569 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] [2023-02-17 07:59:35,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:59:35,579 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 07:59:35,588 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] [2023-02-17 07:59:35,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:59:35,598 INFO L208 MainTranslator]: Completed translation [2023-02-17 07:59:35,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:59:35 WrapperNode [2023-02-17 07:59:35,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 07:59:35,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 07:59:35,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 07:59:35,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 07:59:35,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:59:35" (1/1) ... [2023-02-17 07:59:35,609 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:59:35" (1/1) ... [2023-02-17 07:59:35,621 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2023-02-17 07:59:35,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 07:59:35,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 07:59:35,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 07:59:35,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 07:59:35,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:59:35" (1/1) ... [2023-02-17 07:59:35,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:59:35" (1/1) ... [2023-02-17 07:59:35,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:59:35" (1/1) ... [2023-02-17 07:59:35,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:59:35" (1/1) ... [2023-02-17 07:59:35,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:59:35" (1/1) ... [2023-02-17 07:59:35,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:59:35" (1/1) ... [2023-02-17 07:59:35,648 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:59:35" (1/1) ... [2023-02-17 07:59:35,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:59:35" (1/1) ... [2023-02-17 07:59:35,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 07:59:35,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 07:59:35,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 07:59:35,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 07:59:35,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:59:35" (1/1) ... [2023-02-17 07:59:35,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:59:35,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:59:35,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 07:59:35,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 07:59:35,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 07:59:35,739 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2023-02-17 07:59:35,739 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2023-02-17 07:59:35,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 07:59:35,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 07:59:35,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 07:59:35,803 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 07:59:35,805 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 07:59:35,908 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 07:59:35,912 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 07:59:35,912 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-17 07:59:35,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:59:35 BoogieIcfgContainer [2023-02-17 07:59:35,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 07:59:35,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 07:59:35,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 07:59:35,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 07:59:35,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 07:59:35" (1/3) ... [2023-02-17 07:59:35,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9ce1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:59:35, skipping insertion in model container [2023-02-17 07:59:35,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:59:35" (2/3) ... [2023-02-17 07:59:35,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9ce1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:59:35, skipping insertion in model container [2023-02-17 07:59:35,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:59:35" (3/3) ... [2023-02-17 07:59:35,919 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2023-02-17 07:59:35,941 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 07:59:35,941 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 07:59:35,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 07:59:35,974 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;@21212677, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 07:59:35,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 07:59:35,978 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) [2023-02-17 07:59:35,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 07:59:35,990 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:59:35,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:59:35,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:59:35,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:59:36,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2023-02-17 07:59:36,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:59:36,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705880342] [2023-02-17 07:59:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:59:36,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:59:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:36,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:59:36,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:59:36,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705880342] [2023-02-17 07:59:36,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705880342] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:59:36,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:59:36,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 07:59:36,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901025379] [2023-02-17 07:59:36,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:59:36,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 07:59:36,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:59:36,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 07:59:36,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 07:59:36,393 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) [2023-02-17 07:59:36,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:59:36,503 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-02-17 07:59:36,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 07:59:36,506 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 [2023-02-17 07:59:36,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:59:36,511 INFO L225 Difference]: With dead ends: 29 [2023-02-17 07:59:36,511 INFO L226 Difference]: Without dead ends: 16 [2023-02-17 07:59:36,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 07:59:36,515 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 [2023-02-17 07:59:36,515 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] [2023-02-17 07:59:36,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-02-17 07:59:36,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-02-17 07:59:36,541 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) [2023-02-17 07:59:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-02-17 07:59:36,543 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2023-02-17 07:59:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:59:36,544 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-02-17 07:59:36,544 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) [2023-02-17 07:59:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-02-17 07:59:36,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 07:59:36,546 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:59:36,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:59:36,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 07:59:36,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:59:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:59:36,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2023-02-17 07:59:36,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:59:36,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178916260] [2023-02-17 07:59:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:59:36,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:59:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:36,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:36,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 07:59:36,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:59:36,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178916260] [2023-02-17 07:59:36,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178916260] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:59:36,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329414689] [2023-02-17 07:59:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:59:36,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:36,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:59:36,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:59:36,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 07:59:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:36,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 07:59:36,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:59:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 07:59:37,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:59:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 07:59:37,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329414689] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:59:37,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:59:37,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2023-02-17 07:59:37,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588488772] [2023-02-17 07:59:37,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:59:37,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 07:59:37,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:59:37,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 07:59:37,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-02-17 07:59:37,289 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) [2023-02-17 07:59:37,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:59:37,418 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2023-02-17 07:59:37,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 07:59:37,419 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 [2023-02-17 07:59:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:59:37,420 INFO L225 Difference]: With dead ends: 28 [2023-02-17 07:59:37,420 INFO L226 Difference]: Without dead ends: 22 [2023-02-17 07:59:37,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-02-17 07:59:37,422 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-02-17 07:59:37,423 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] [2023-02-17 07:59:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-17 07:59:37,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-17 07:59:37,427 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) [2023-02-17 07:59:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-02-17 07:59:37,428 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2023-02-17 07:59:37,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:59:37,428 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-02-17 07:59:37,429 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) [2023-02-17 07:59:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-02-17 07:59:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 07:59:37,430 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:59:37,430 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:59:37,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 07:59:37,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:37,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:59:37,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:59:37,638 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2023-02-17 07:59:37,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:59:37,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926663962] [2023-02-17 07:59:37,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:59:37,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:59:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:37,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:37,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:37,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:37,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 07:59:37,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:59:37,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926663962] [2023-02-17 07:59:37,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926663962] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:59:37,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338327472] [2023-02-17 07:59:37,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:59:37,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:37,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:59:38,010 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:59:38,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 07:59:38,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:59:38,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:59:38,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 07:59:38,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:59:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 07:59:38,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:59:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 07:59:38,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338327472] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:59:38,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:59:38,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 15] total 30 [2023-02-17 07:59:38,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719707226] [2023-02-17 07:59:38,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:59:38,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-17 07:59:38,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:59:38,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-17 07:59:38,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2023-02-17 07:59:38,533 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) [2023-02-17 07:59:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:59:38,749 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2023-02-17 07:59:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 07:59:38,749 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 [2023-02-17 07:59:38,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:59:38,750 INFO L225 Difference]: With dead ends: 37 [2023-02-17 07:59:38,750 INFO L226 Difference]: Without dead ends: 31 [2023-02-17 07:59:38,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 07:59:38,752 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 [2023-02-17 07:59:38,753 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] [2023-02-17 07:59:38,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-17 07:59:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-17 07:59:38,757 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) [2023-02-17 07:59:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-02-17 07:59:38,758 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2023-02-17 07:59:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:59:38,759 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-02-17 07:59:38,759 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) [2023-02-17 07:59:38,759 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-02-17 07:59:38,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-17 07:59:38,760 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:59:38,760 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:59:38,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 07:59:38,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-17 07:59:38,967 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:59:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:59:38,967 INFO L85 PathProgramCache]: Analyzing trace with hash 278928068, now seen corresponding path program 3 times [2023-02-17 07:59:38,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:59:38,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157076509] [2023-02-17 07:59:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:59:38,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:59:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:39,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:39,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:39,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:39,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:39,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:39,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:39,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-17 07:59:39,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:59:39,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157076509] [2023-02-17 07:59:39,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157076509] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:59:39,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835865863] [2023-02-17 07:59:39,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 07:59:39,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:39,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:59:39,545 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:59:39,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 07:59:39,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-17 07:59:39,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:59:39,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-17 07:59:39,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:59:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-17 07:59:39,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:59:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 07:59:40,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835865863] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:59:40,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:59:40,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 24] total 45 [2023-02-17 07:59:40,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881022947] [2023-02-17 07:59:40,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:59:40,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-17 07:59:40,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:59:40,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-17 07:59:40,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2023-02-17 07:59:40,549 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) [2023-02-17 07:59:40,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:59:40,929 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-02-17 07:59:40,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-17 07:59:40,929 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 [2023-02-17 07:59:40,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:59:40,930 INFO L225 Difference]: With dead ends: 55 [2023-02-17 07:59:40,930 INFO L226 Difference]: Without dead ends: 49 [2023-02-17 07:59:40,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 61 SyntacticMatches, 19 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=612, Invalid=3944, Unknown=0, NotChecked=0, Total=4556 [2023-02-17 07:59:40,932 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 [2023-02-17 07:59:40,932 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] [2023-02-17 07:59:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-17 07:59:40,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-02-17 07:59:40,937 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) [2023-02-17 07:59:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-02-17 07:59:40,937 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2023-02-17 07:59:40,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:59:40,938 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-02-17 07:59:40,938 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) [2023-02-17 07:59:40,938 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-02-17 07:59:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-02-17 07:59:40,939 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:59:40,940 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:59:40,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 07:59:41,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:41,144 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:59:41,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:59:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2030797316, now seen corresponding path program 4 times [2023-02-17 07:59:41,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:59:41,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585558955] [2023-02-17 07:59:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:59:41,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:59:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:41,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:41,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:41,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:41,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:41,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:42,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:42,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:42,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:42,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:42,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:42,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:42,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:42,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-02-17 07:59:42,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:59:42,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585558955] [2023-02-17 07:59:42,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585558955] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:59:42,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497400440] [2023-02-17 07:59:42,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 07:59:42,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:42,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:59:42,605 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:59:42,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 07:59:42,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 07:59:42,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:59:42,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-17 07:59:42,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:59:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-02-17 07:59:43,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:59:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-17 07:59:45,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497400440] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:59:45,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:59:45,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 42] total 75 [2023-02-17 07:59:45,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523738533] [2023-02-17 07:59:45,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:59:45,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-02-17 07:59:45,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:59:45,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-02-17 07:59:45,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=5001, Unknown=0, NotChecked=0, Total=5550 [2023-02-17 07:59:45,442 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) [2023-02-17 07:59:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:59:46,606 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2023-02-17 07:59:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-17 07:59:46,606 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 [2023-02-17 07:59:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:59:46,607 INFO L225 Difference]: With dead ends: 91 [2023-02-17 07:59:46,608 INFO L226 Difference]: Without dead ends: 85 [2023-02-17 07:59:46,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 109 SyntacticMatches, 37 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3858 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1830, Invalid=12932, Unknown=0, NotChecked=0, Total=14762 [2023-02-17 07:59:46,613 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 [2023-02-17 07:59:46,613 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] [2023-02-17 07:59:46,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-17 07:59:46,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-02-17 07:59:46,621 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) [2023-02-17 07:59:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-02-17 07:59:46,622 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2023-02-17 07:59:46,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:59:46,622 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-02-17 07:59:46,623 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) [2023-02-17 07:59:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-02-17 07:59:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-02-17 07:59:46,624 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:59:46,624 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:59:46,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 07:59:46,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:46,841 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:59:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:59:46,842 INFO L85 PathProgramCache]: Analyzing trace with hash -341184380, now seen corresponding path program 5 times [2023-02-17 07:59:46,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:59:46,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452927646] [2023-02-17 07:59:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:59:46,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:59:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:47,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:47,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:48,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:48,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:48,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:49,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:49,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:49,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:49,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:49,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:50,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:50,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:50,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:50,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:50,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:50,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:50,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:51,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:51,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:51,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:51,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:51,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:51,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:51,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:51,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2023-02-17 07:59:51,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:59:51,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452927646] [2023-02-17 07:59:51,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452927646] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:59:51,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022494204] [2023-02-17 07:59:51,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 07:59:51,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:51,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:59:51,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:59:51,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 07:59:52,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-02-17 07:59:52,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:59:52,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-17 07:59:52,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:59:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 876 proven. 0 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2023-02-17 07:59:54,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:59:54,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022494204] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:59:54,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:59:54,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [54] total 106 [2023-02-17 07:59:54,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597790795] [2023-02-17 07:59:54,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:59:54,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-17 07:59:54,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:59:54,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-17 07:59:54,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=789, Invalid=10341, Unknown=0, NotChecked=0, Total=11130 [2023-02-17 07:59:54,368 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) [2023-02-17 07:59:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:59:54,565 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2023-02-17 07:59:54,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-17 07:59:54,566 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 [2023-02-17 07:59:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:59:54,570 INFO L225 Difference]: With dead ends: 85 [2023-02-17 07:59:54,571 INFO L226 Difference]: Without dead ends: 0 [2023-02-17 07:59:54,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=789, Invalid=10341, Unknown=0, NotChecked=0, Total=11130 [2023-02-17 07:59:54,577 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 [2023-02-17 07:59:54,578 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] [2023-02-17 07:59:54,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-17 07:59:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-17 07:59:54,579 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) [2023-02-17 07:59:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-17 07:59:54,579 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 155 [2023-02-17 07:59:54,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:59:54,579 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-17 07:59:54,580 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) [2023-02-17 07:59:54,580 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-17 07:59:54,580 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-17 07:59:54,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-17 07:59:54,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 07:59:54,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:54,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-17 07:59:54,791 INFO L899 garLoopResultBuilder]: For program point hanoiEXIT(lines 18 23) no Hoare annotation was computed. [2023-02-17 07:59:54,791 INFO L899 garLoopResultBuilder]: For program point hanoiFINAL(lines 18 23) no Hoare annotation was computed. [2023-02-17 07:59:54,792 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 18 23) the Hoare annotation is: true [2023-02-17 07:59:54,792 INFO L895 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (and (= hanoi_~n |hanoi_#in~n|) (= |hanoi_#in~n| hanoi_~n)) [2023-02-17 07:59:54,792 INFO L899 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2023-02-17 07:59:54,792 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 21) no Hoare annotation was computed. [2023-02-17 07:59:54,792 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-17 07:59:54,792 INFO L899 garLoopResultBuilder]: For program point L32(lines 32 36) no Hoare annotation was computed. [2023-02-17 07:59:54,792 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-17 07:59:54,792 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (not (> |ULTIMATE.start_main_~n~0#1| 31)) [2023-02-17 07:59:54,792 INFO L899 garLoopResultBuilder]: For program point L31-1(line 31) no Hoare annotation was computed. [2023-02-17 07:59:54,792 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-17 07:59:54,792 INFO L899 garLoopResultBuilder]: For program point L28(lines 28 30) no Hoare annotation was computed. [2023-02-17 07:59:54,792 INFO L902 garLoopResultBuilder]: At program point L26(lines 26 37) the Hoare annotation is: true [2023-02-17 07:59:54,792 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2023-02-17 07:59:54,792 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-17 07:59:54,792 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2023-02-17 07:59:54,794 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1] [2023-02-17 07:59:54,795 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-17 07:59:54,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.02 07:59:54 BoogieIcfgContainer [2023-02-17 07:59:54,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-17 07:59:54,803 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-17 07:59:54,803 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-17 07:59:54,804 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-17 07:59:54,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:59:35" (3/4) ... [2023-02-17 07:59:54,808 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-17 07:59:54,825 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure hanoi [2023-02-17 07:59:54,828 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-02-17 07:59:54,831 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-02-17 07:59:54,831 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-17 07:59:54,831 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-17 07:59:54,854 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-17 07:59:54,855 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-17 07:59:54,855 INFO L158 Benchmark]: Toolchain (without parser) took 19412.78ms. Allocated memory was 169.9MB in the beginning and 645.9MB in the end (delta: 476.1MB). Free memory was 125.1MB in the beginning and 368.4MB in the end (delta: -243.4MB). Peak memory consumption was 232.1MB. Max. memory is 16.1GB. [2023-02-17 07:59:54,855 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 115.3MB. Free memory is still 59.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 07:59:54,855 INFO L158 Benchmark]: CACSL2BoogieTranslator took 155.51ms. Allocated memory is still 169.9MB. Free memory was 124.5MB in the beginning and 115.1MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-17 07:59:54,856 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.63ms. Allocated memory is still 169.9MB. Free memory was 115.1MB in the beginning and 113.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 07:59:54,856 INFO L158 Benchmark]: Boogie Preprocessor took 28.89ms. Allocated memory is still 169.9MB. Free memory was 113.5MB in the beginning and 112.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 07:59:54,856 INFO L158 Benchmark]: RCFGBuilder took 262.11ms. Allocated memory is still 169.9MB. Free memory was 112.5MB in the beginning and 103.5MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-17 07:59:54,856 INFO L158 Benchmark]: TraceAbstraction took 18887.84ms. Allocated memory was 169.9MB in the beginning and 645.9MB in the end (delta: 476.1MB). Free memory was 102.5MB in the beginning and 370.9MB in the end (delta: -268.4MB). Peak memory consumption was 207.0MB. Max. memory is 16.1GB. [2023-02-17 07:59:54,856 INFO L158 Benchmark]: Witness Printer took 51.16ms. Allocated memory is still 645.9MB. Free memory was 370.9MB in the beginning and 368.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 07:59:54,857 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 115.3MB. Free memory is still 59.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 155.51ms. Allocated memory is still 169.9MB. Free memory was 124.5MB in the beginning and 115.1MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.63ms. Allocated memory is still 169.9MB. Free memory was 115.1MB in the beginning and 113.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.89ms. Allocated memory is still 169.9MB. Free memory was 113.5MB in the beginning and 112.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 262.11ms. Allocated memory is still 169.9MB. Free memory was 112.5MB in the beginning and 103.5MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 18887.84ms. Allocated memory was 169.9MB in the beginning and 645.9MB in the end (delta: 476.1MB). Free memory was 102.5MB in the beginning and 370.9MB in the end (delta: -268.4MB). Peak memory consumption was 207.0MB. Max. memory is 16.1GB. * Witness Printer took 51.16ms. Allocated memory is still 645.9MB. Free memory was 370.9MB in the beginning and 368.4MB in the end (delta: 2.5MB). 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: 18.8s, 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, 1.0s 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, 383 SyntacticMatches, 71 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6143 ImplicationChecksByTransitivity, 7.8s 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: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 6 PreInvPairs, 8 NumberOfFragments, 13 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 14.4s 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! [2023-02-17 07:59:54,872 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