./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 3dbbec33 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-?-3dbbec3 [2023-02-14 13:04:21,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 13:04:21,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 13:04:21,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 13:04:21,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 13:04:21,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 13:04:21,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 13:04:21,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 13:04:21,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 13:04:21,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 13:04:21,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 13:04:21,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 13:04:21,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 13:04:21,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 13:04:21,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 13:04:21,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 13:04:21,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 13:04:21,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 13:04:21,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 13:04:21,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 13:04:21,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 13:04:21,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 13:04:21,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 13:04:21,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 13:04:21,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 13:04:21,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 13:04:21,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 13:04:21,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 13:04:21,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 13:04:21,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 13:04:21,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 13:04:21,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 13:04:21,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 13:04:21,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 13:04:21,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 13:04:21,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 13:04:21,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 13:04:21,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 13:04:21,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 13:04:21,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 13:04:21,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 13:04:21,451 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 13:04:21,477 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 13:04:21,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 13:04:21,478 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 13:04:21,478 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 13:04:21,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 13:04:21,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 13:04:21,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 13:04:21,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 13:04:21,480 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 13:04:21,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 13:04:21,480 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 13:04:21,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 13:04:21,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 13:04:21,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 13:04:21,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 13:04:21,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 13:04:21,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 13:04:21,481 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 13:04:21,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 13:04:21,482 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 13:04:21,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 13:04:21,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 13:04:21,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 13:04:21,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 13:04:21,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:04:21,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 13:04:21,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 13:04:21,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 13:04:21,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 13:04:21,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 13:04:21,483 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 13:04:21,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 13:04:21,484 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 13:04:21,484 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 13:04:21,484 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 13:04:21,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6256a35b65d93a8e45ad38c9510c3be689a890aeee58265a5723be13a7385a72 [2023-02-14 13:04:21,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 13:04:21,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 13:04:21,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 13:04:21,712 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 13:04:21,713 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 13:04:21,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/recHanoi03-2.c [2023-02-14 13:04:22,728 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 13:04:22,867 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 13:04:22,867 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/recHanoi03-2.c [2023-02-14 13:04:22,871 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad81d856/55ffd2c05ebe40c0883f1dc52486ba7a/FLAGc996ef569 [2023-02-14 13:04:23,279 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad81d856/55ffd2c05ebe40c0883f1dc52486ba7a [2023-02-14 13:04:23,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 13:04:23,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 13:04:23,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 13:04:23,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 13:04:23,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 13:04:23,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:04:23" (1/1) ... [2023-02-14 13:04:23,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f78e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:04:23, skipping insertion in model container [2023-02-14 13:04:23,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:04:23" (1/1) ... [2023-02-14 13:04:23,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 13:04:23,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:04:23,401 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] [2023-02-14 13:04:23,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:04:23,410 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 13:04:23,420 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] [2023-02-14 13:04:23,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:04:23,429 INFO L208 MainTranslator]: Completed translation [2023-02-14 13:04:23,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:04:23 WrapperNode [2023-02-14 13:04:23,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 13:04:23,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 13:04:23,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 13:04:23,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 13:04:23,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:04:23" (1/1) ... [2023-02-14 13:04:23,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:04:23" (1/1) ... [2023-02-14 13:04:23,451 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2023-02-14 13:04:23,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 13:04:23,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 13:04:23,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 13:04:23,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 13:04:23,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:04:23" (1/1) ... [2023-02-14 13:04:23,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:04:23" (1/1) ... [2023-02-14 13:04:23,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:04:23" (1/1) ... [2023-02-14 13:04:23,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:04:23" (1/1) ... [2023-02-14 13:04:23,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:04:23" (1/1) ... [2023-02-14 13:04:23,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:04:23" (1/1) ... [2023-02-14 13:04:23,462 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:04:23" (1/1) ... [2023-02-14 13:04:23,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:04:23" (1/1) ... [2023-02-14 13:04:23,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 13:04:23,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 13:04:23,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 13:04:23,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 13:04:23,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:04:23" (1/1) ... [2023-02-14 13:04:23,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:04:23,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:23,491 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) [2023-02-14 13:04:23,503 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 [2023-02-14 13:04:23,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 13:04:23,520 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2023-02-14 13:04:23,521 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2023-02-14 13:04:23,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 13:04:23,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 13:04:23,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 13:04:23,567 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 13:04:23,568 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 13:04:23,691 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 13:04:23,697 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 13:04:23,699 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-14 13:04:23,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:04:23 BoogieIcfgContainer [2023-02-14 13:04:23,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 13:04:23,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 13:04:23,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 13:04:23,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 13:04:23,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:04:23" (1/3) ... [2023-02-14 13:04:23,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8a1090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:04:23, skipping insertion in model container [2023-02-14 13:04:23,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:04:23" (2/3) ... [2023-02-14 13:04:23,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f8a1090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:04:23, skipping insertion in model container [2023-02-14 13:04:23,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:04:23" (3/3) ... [2023-02-14 13:04:23,708 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2023-02-14 13:04:23,739 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 13:04:23,740 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 13:04:23,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 13:04:23,798 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;@3a604e05, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 13:04:23,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 13:04:23,803 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) [2023-02-14 13:04:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 13:04:23,810 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:23,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:23,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:23,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:23,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2023-02-14 13:04:23,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:23,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39601156] [2023-02-14 13:04:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:23,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:24,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:04:24,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:24,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39601156] [2023-02-14 13:04:24,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39601156] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:04:24,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:04:24,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 13:04:24,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384132711] [2023-02-14 13:04:24,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:04:24,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 13:04:24,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:24,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 13:04:24,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:04:24,163 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) [2023-02-14 13:04:24,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:24,239 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-02-14 13:04:24,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 13:04:24,241 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 [2023-02-14 13:04:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:24,247 INFO L225 Difference]: With dead ends: 29 [2023-02-14 13:04:24,247 INFO L226 Difference]: Without dead ends: 16 [2023-02-14 13:04:24,249 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 [2023-02-14 13:04:24,252 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:24,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 52 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 13:04:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-02-14 13:04:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-02-14 13:04:24,279 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) [2023-02-14 13:04:24,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-02-14 13:04:24,281 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2023-02-14 13:04:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:24,281 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-02-14 13:04:24,282 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) [2023-02-14 13:04:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-02-14 13:04:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-14 13:04:24,283 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:24,283 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:24,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 13:04:24,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2023-02-14 13:04:24,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:24,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244500746] [2023-02-14 13:04:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:24,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:24,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:24,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:04:24,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:24,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244500746] [2023-02-14 13:04:24,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244500746] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:24,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752396614] [2023-02-14 13:04:24,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:24,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:24,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:24,570 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) [2023-02-14 13:04:24,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 13:04:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:24,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 13:04:24,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 13:04:24,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:04:24,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752396614] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:04:24,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:04:24,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 21 [2023-02-14 13:04:24,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193712922] [2023-02-14 13:04:24,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:24,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 13:04:24,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:24,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 13:04:24,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-02-14 13:04:24,973 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 15 states have internal predecessors, (29), 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) [2023-02-14 13:04:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:25,091 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2023-02-14 13:04:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 13:04:25,092 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 15 states have internal predecessors, (29), 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 [2023-02-14 13:04:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:25,093 INFO L225 Difference]: With dead ends: 28 [2023-02-14 13:04:25,093 INFO L226 Difference]: Without dead ends: 22 [2023-02-14 13:04:25,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2023-02-14 13:04:25,100 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:25,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 61 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:04:25,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-14 13:04:25,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-14 13:04:25,107 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) [2023-02-14 13:04:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-02-14 13:04:25,109 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2023-02-14 13:04:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:25,109 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-02-14 13:04:25,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 15 states have internal predecessors, (29), 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) [2023-02-14 13:04:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-02-14 13:04:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 13:04:25,110 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:25,110 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:25,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 13:04:25,315 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 [2023-02-14 13:04:25,316 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:25,317 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2023-02-14 13:04:25,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:25,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214680668] [2023-02-14 13:04:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:25,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:25,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:25,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:25,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:25,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 13:04:25,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:25,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214680668] [2023-02-14 13:04:25,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214680668] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:25,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155650448] [2023-02-14 13:04:25,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:04:25,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:25,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:25,682 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) [2023-02-14 13:04:25,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 13:04:25,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:04:25,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:04:25,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 13:04:25,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 13:04:25,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 13:04:26,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155650448] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:04:26,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:04:26,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 15] total 31 [2023-02-14 13:04:26,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30534392] [2023-02-14 13:04:26,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:26,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 13:04:26,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:26,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 13:04:26,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2023-02-14 13:04:26,751 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 21 states have internal predecessors, (41), 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) [2023-02-14 13:04:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:26,949 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2023-02-14 13:04:26,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 13:04:26,950 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 21 states have internal predecessors, (41), 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 [2023-02-14 13:04:26,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:26,951 INFO L225 Difference]: With dead ends: 37 [2023-02-14 13:04:26,952 INFO L226 Difference]: Without dead ends: 31 [2023-02-14 13:04:26,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=1457, Unknown=0, NotChecked=0, Total=1722 [2023-02-14 13:04:26,955 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:26,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 115 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:04:26,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-14 13:04:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-14 13:04:26,963 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) [2023-02-14 13:04:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-02-14 13:04:26,964 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2023-02-14 13:04:26,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:26,965 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-02-14 13:04:26,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 21 states have internal predecessors, (41), 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) [2023-02-14 13:04:26,965 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-02-14 13:04:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 13:04:26,966 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:26,967 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:26,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 13:04:27,174 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 [2023-02-14 13:04:27,174 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:27,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:27,179 INFO L85 PathProgramCache]: Analyzing trace with hash 278928068, now seen corresponding path program 3 times [2023-02-14 13:04:27,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:27,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108050146] [2023-02-14 13:04:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:27,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:27,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:27,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:27,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:27,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:27,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:27,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:27,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-14 13:04:27,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:27,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108050146] [2023-02-14 13:04:27,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108050146] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:27,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329833808] [2023-02-14 13:04:27,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:04:27,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:27,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:27,774 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) [2023-02-14 13:04:27,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 13:04:27,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-14 13:04:27,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:04:27,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-14 13:04:27,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-14 13:04:28,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 13:04:30,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329833808] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:04:30,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:04:30,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 24] total 46 [2023-02-14 13:04:30,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447294222] [2023-02-14 13:04:30,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:30,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-14 13:04:30,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:30,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-14 13:04:30,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2023-02-14 13:04:30,878 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 30 states have internal predecessors, (59), 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) [2023-02-14 13:04:31,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:31,425 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-02-14 13:04:31,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-14 13:04:31,426 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 30 states have internal predecessors, (59), 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 [2023-02-14 13:04:31,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:31,427 INFO L225 Difference]: With dead ends: 55 [2023-02-14 13:04:31,427 INFO L226 Difference]: Without dead ends: 49 [2023-02-14 13:04:31,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 68 SyntacticMatches, 11 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=646, Invalid=4046, Unknown=0, NotChecked=0, Total=4692 [2023-02-14 13:04:31,429 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:31,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 269 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:04:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-14 13:04:31,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-02-14 13:04:31,434 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) [2023-02-14 13:04:31,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-02-14 13:04:31,435 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2023-02-14 13:04:31,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:31,435 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-02-14 13:04:31,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 30 states have internal predecessors, (59), 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) [2023-02-14 13:04:31,436 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-02-14 13:04:31,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-02-14 13:04:31,437 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:31,437 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:31,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 13:04:31,642 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 [2023-02-14 13:04:31,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:31,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:31,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2030797316, now seen corresponding path program 4 times [2023-02-14 13:04:31,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:31,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562368975] [2023-02-14 13:04:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:31,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:31,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:31,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-02-14 13:04:32,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:32,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562368975] [2023-02-14 13:04:32,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562368975] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:32,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265793379] [2023-02-14 13:04:32,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 13:04:32,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:32,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:32,972 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) [2023-02-14 13:04:33,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 13:04:33,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 13:04:33,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:04:33,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-14 13:04:33,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-02-14 13:04:34,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-14 13:04:45,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265793379] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:04:45,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:04:45,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 42] total 76 [2023-02-14 13:04:45,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302431259] [2023-02-14 13:04:45,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:45,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-14 13:04:45,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:45,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-14 13:04:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=5134, Unknown=0, NotChecked=0, Total=5700 [2023-02-14 13:04:45,924 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 76 states, 76 states have (on average 1.25) internal successors, (95), 48 states have internal predecessors, (95), 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) [2023-02-14 13:04:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:47,282 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2023-02-14 13:04:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-14 13:04:47,283 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.25) internal successors, (95), 48 states have internal predecessors, (95), 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 [2023-02-14 13:04:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:47,289 INFO L225 Difference]: With dead ends: 91 [2023-02-14 13:04:47,289 INFO L226 Difference]: Without dead ends: 85 [2023-02-14 13:04:47,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 122 SyntacticMatches, 23 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3994 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1894, Invalid=13112, Unknown=0, NotChecked=0, Total=15006 [2023-02-14 13:04:47,293 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:47,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 608 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 13:04:47,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-14 13:04:47,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-02-14 13:04:47,311 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) [2023-02-14 13:04:47,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-02-14 13:04:47,317 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2023-02-14 13:04:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:47,317 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-02-14 13:04:47,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.25) internal successors, (95), 48 states have internal predecessors, (95), 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) [2023-02-14 13:04:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-02-14 13:04:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-02-14 13:04:47,321 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:47,321 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:47,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 13:04:47,526 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 [2023-02-14 13:04:47,526 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:47,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:47,527 INFO L85 PathProgramCache]: Analyzing trace with hash -341184380, now seen corresponding path program 5 times [2023-02-14 13:04:47,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:47,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805227214] [2023-02-14 13:04:47,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:47,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:47,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:48,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:48,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:49,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:49,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:49,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:50,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:50,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:50,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:50,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:50,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:04:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2023-02-14 13:04:52,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:52,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805227214] [2023-02-14 13:04:52,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805227214] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:52,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151573058] [2023-02-14 13:04:52,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 13:04:52,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:52,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:52,629 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:04:52,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 13:04:52,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-02-14 13:04:52,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:04:52,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-14 13:04:52,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 876 proven. 0 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2023-02-14 13:04:55,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:04:55,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151573058] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:04:55,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:04:55,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [55] total 107 [2023-02-14 13:04:55,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210331529] [2023-02-14 13:04:55,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:04:55,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-14 13:04:55,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:55,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-14 13:04:55,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=10549, Unknown=0, NotChecked=0, Total=11342 [2023-02-14 13:04:55,340 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) [2023-02-14 13:04:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:55,559 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2023-02-14 13:04:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-14 13:04:55,559 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 [2023-02-14 13:04:55,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:55,560 INFO L225 Difference]: With dead ends: 85 [2023-02-14 13:04:55,560 INFO L226 Difference]: Without dead ends: 0 [2023-02-14 13:04:55,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=793, Invalid=10549, Unknown=0, NotChecked=0, Total=11342 [2023-02-14 13:04:55,563 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:55,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 391 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:04:55,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-14 13:04:55,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-14 13:04:55,564 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) [2023-02-14 13:04:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-14 13:04:55,564 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 155 [2023-02-14 13:04:55,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:55,565 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-14 13:04:55,565 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) [2023-02-14 13:04:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-14 13:04:55,565 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-14 13:04:55,567 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-14 13:04:55,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 13:04:55,773 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 [2023-02-14 13:04:55,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-14 13:04:55,781 INFO L899 garLoopResultBuilder]: For program point hanoiEXIT(lines 18 23) no Hoare annotation was computed. [2023-02-14 13:04:55,781 INFO L899 garLoopResultBuilder]: For program point hanoiFINAL(lines 18 23) no Hoare annotation was computed. [2023-02-14 13:04:55,781 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 18 23) the Hoare annotation is: true [2023-02-14 13:04:55,782 INFO L895 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (= hanoi_~n |hanoi_#in~n|) [2023-02-14 13:04:55,782 INFO L899 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2023-02-14 13:04:55,782 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 21) no Hoare annotation was computed. [2023-02-14 13:04:55,782 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-14 13:04:55,782 INFO L899 garLoopResultBuilder]: For program point L32(lines 32 36) no Hoare annotation was computed. [2023-02-14 13:04:55,782 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-14 13:04:55,782 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (not (< 31 |ULTIMATE.start_main_~n~0#1|)) [2023-02-14 13:04:55,782 INFO L899 garLoopResultBuilder]: For program point L31-1(line 31) no Hoare annotation was computed. [2023-02-14 13:04:55,783 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-14 13:04:55,783 INFO L899 garLoopResultBuilder]: For program point L28(lines 28 30) no Hoare annotation was computed. [2023-02-14 13:04:55,783 INFO L902 garLoopResultBuilder]: At program point L26(lines 26 37) the Hoare annotation is: true [2023-02-14 13:04:55,783 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2023-02-14 13:04:55,783 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-14 13:04:55,783 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2023-02-14 13:04:55,785 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1] [2023-02-14 13:04:55,786 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-14 13:04:55,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 01:04:55 BoogieIcfgContainer [2023-02-14 13:04:55,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-14 13:04:55,792 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-14 13:04:55,792 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-14 13:04:55,793 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-14 13:04:55,793 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:04:23" (3/4) ... [2023-02-14 13:04:55,795 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-14 13:04:55,800 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure hanoi [2023-02-14 13:04:55,802 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-02-14 13:04:55,807 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-02-14 13:04:55,807 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-14 13:04:55,807 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-14 13:04:55,826 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-14 13:04:55,827 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-14 13:04:55,827 INFO L158 Benchmark]: Toolchain (without parser) took 32545.12ms. Allocated memory was 98.6MB in the beginning and 704.6MB in the end (delta: 606.1MB). Free memory was 62.9MB in the beginning and 525.8MB in the end (delta: -462.9MB). Peak memory consumption was 145.1MB. Max. memory is 16.1GB. [2023-02-14 13:04:55,827 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 98.6MB. Free memory is still 65.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-14 13:04:55,827 INFO L158 Benchmark]: CACSL2BoogieTranslator took 145.66ms. Allocated memory is still 98.6MB. Free memory was 62.8MB in the beginning and 53.0MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-14 13:04:55,828 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.81ms. Allocated memory is still 98.6MB. Free memory was 52.8MB in the beginning and 51.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 13:04:55,828 INFO L158 Benchmark]: Boogie Preprocessor took 11.81ms. Allocated memory is still 98.6MB. Free memory was 51.5MB in the beginning and 50.6MB in the end (delta: 874.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-14 13:04:55,828 INFO L158 Benchmark]: RCFGBuilder took 237.34ms. Allocated memory is still 98.6MB. Free memory was 50.4MB in the beginning and 41.4MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-14 13:04:55,828 INFO L158 Benchmark]: TraceAbstraction took 32088.80ms. Allocated memory was 98.6MB in the beginning and 704.6MB in the end (delta: 606.1MB). Free memory was 40.6MB in the beginning and 527.9MB in the end (delta: -487.3MB). Peak memory consumption was 119.9MB. Max. memory is 16.1GB. [2023-02-14 13:04:55,829 INFO L158 Benchmark]: Witness Printer took 34.35ms. Allocated memory is still 704.6MB. Free memory was 527.9MB in the beginning and 525.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 13:04:55,830 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 98.6MB. Free memory is still 65.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 145.66ms. Allocated memory is still 98.6MB. Free memory was 62.8MB in the beginning and 53.0MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.81ms. Allocated memory is still 98.6MB. Free memory was 52.8MB in the beginning and 51.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 11.81ms. Allocated memory is still 98.6MB. Free memory was 51.5MB in the beginning and 50.6MB in the end (delta: 874.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 237.34ms. Allocated memory is still 98.6MB. Free memory was 50.4MB in the beginning and 41.4MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 32088.80ms. Allocated memory was 98.6MB in the beginning and 704.6MB in the end (delta: 606.1MB). Free memory was 40.6MB in the beginning and 527.9MB in the end (delta: -487.3MB). Peak memory consumption was 119.9MB. Max. memory is 16.1GB. * Witness Printer took 34.35ms. Allocated memory is still 704.6MB. Free memory was 527.9MB in the beginning and 525.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 35]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 32.0s, OverallIterations: 6, TraceHistogramMax: 25, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 311 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 260 mSDsluCounter, 1496 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1364 mSDsCounter, 112 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2225 IncrementalHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 112 mSolverCounterUnsat, 132 mSDtfsCounter, 2225 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 811 GetRequests, 409 SyntacticMatches, 40 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6532 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=5, InterpolantAutomatonStates: 174, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 6 PreInvPairs, 8 NumberOfFragments, 9 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 27.4s InterpolantComputationTime, 673 NumberOfCodeBlocks, 673 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 834 ConstructedInterpolants, 0 QuantifiedInterpolants, 3515 SizeOfPredicates, 36 NumberOfNonLiveVariables, 884 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 3280/5280 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! [2023-02-14 13:04:55,856 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