./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/bitvector-regression/recHanoi03-1.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 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:28:11,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:28:11,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:28:11,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:28:11,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:28:11,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:28:11,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:28:11,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:28:11,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:28:11,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:28:11,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:28:11,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:28:11,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:28:11,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:28:11,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:28:11,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:28:11,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:28:11,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:28:11,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:28:11,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:28:11,663 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:28:11,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:28:11,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:28:11,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:28:11,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:28:11,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:28:11,667 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:28:11,667 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:28:11,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:28:11,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:28:11,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:28:11,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:28:11,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:28:11,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:28:11,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:28:11,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:28:11,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:28:11,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:28:11,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:28:11,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:28:11,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:28:11,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:28:11,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:28:11,690 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:28:11,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:28:11,690 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:28:11,691 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:28:11,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:28:11,691 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:28:11,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:28:11,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:28:11,692 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:28:11,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:28:11,693 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:28:11,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:28:11,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:28:11,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:28:11,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:28:11,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:28:11,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:28:11,694 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:28:11,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:28:11,694 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:28:11,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:28:11,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:28:11,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:28:11,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:28:11,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:28:11,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:28:11,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:28:11,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:28:11,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:28:11,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:28:11,697 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:28:11,697 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:28:11,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:28:11,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2022-07-13 11:28:11,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:28:11,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:28:11,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:28:11,931 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:28:11,931 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:28:11,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-07-13 11:28:11,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d8bb23ea/63611f6325ed45b787020728a5ffa750/FLAG6d381e722 [2022-07-13 11:28:12,357 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:28:12,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-07-13 11:28:12,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d8bb23ea/63611f6325ed45b787020728a5ffa750/FLAG6d381e722 [2022-07-13 11:28:12,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d8bb23ea/63611f6325ed45b787020728a5ffa750 [2022-07-13 11:28:12,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:28:12,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:28:12,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:28:12,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:28:12,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:28:12,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:28:12" (1/1) ... [2022-07-13 11:28:12,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@270874eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:12, skipping insertion in model container [2022-07-13 11:28:12,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:28:12" (1/1) ... [2022-07-13 11:28:12,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:28:12,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:28:12,531 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2022-07-13 11:28:12,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:28:12,538 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:28:12,546 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2022-07-13 11:28:12,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:28:12,555 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:28:12,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:12 WrapperNode [2022-07-13 11:28:12,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:28:12,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:28:12,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:28:12,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:28:12,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:12" (1/1) ... [2022-07-13 11:28:12,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:12" (1/1) ... [2022-07-13 11:28:12,577 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 25 [2022-07-13 11:28:12,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:28:12,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:28:12,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:28:12,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:28:12,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:12" (1/1) ... [2022-07-13 11:28:12,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:12" (1/1) ... [2022-07-13 11:28:12,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:12" (1/1) ... [2022-07-13 11:28:12,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:12" (1/1) ... [2022-07-13 11:28:12,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:12" (1/1) ... [2022-07-13 11:28:12,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:12" (1/1) ... [2022-07-13 11:28:12,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:12" (1/1) ... [2022-07-13 11:28:12,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:28:12,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:28:12,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:28:12,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:28:12,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:12" (1/1) ... [2022-07-13 11:28:12,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:28:12,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:28:12,621 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) [2022-07-13 11:28:12,629 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 [2022-07-13 11:28:12,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:28:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-07-13 11:28:12,654 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-07-13 11:28:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:28:12,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:28:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:28:12,689 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:28:12,690 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:28:12,760 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:28:12,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:28:12,764 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 11:28:12,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:28:12 BoogieIcfgContainer [2022-07-13 11:28:12,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:28:12,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:28:12,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:28:12,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:28:12,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:28:12" (1/3) ... [2022-07-13 11:28:12,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7ddb27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:28:12, skipping insertion in model container [2022-07-13 11:28:12,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:12" (2/3) ... [2022-07-13 11:28:12,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7ddb27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:28:12, skipping insertion in model container [2022-07-13 11:28:12,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:28:12" (3/3) ... [2022-07-13 11:28:12,772 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2022-07-13 11:28:12,781 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:28:12,781 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:28:12,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:28:12,812 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@87a764e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3a5c6479 [2022-07-13 11:28:12,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:28:12,815 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) [2022-07-13 11:28:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 11:28:12,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:12,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:28:12,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:12,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2022-07-13 11:28:12,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:28:12,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021106269] [2022-07-13 11:28:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:28:12,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:28:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 11:28:12,891 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 11:28:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 11:28:12,913 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 11:28:12,915 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 11:28:12,916 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 11:28:12,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:28:12,920 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-13 11:28:12,924 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 11:28:12,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 11:28:12 BoogieIcfgContainer [2022-07-13 11:28:12,939 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 11:28:12,939 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 11:28:12,939 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 11:28:12,940 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 11:28:12,940 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:28:12" (3/4) ... [2022-07-13 11:28:12,942 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-13 11:28:12,942 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 11:28:12,943 INFO L158 Benchmark]: Toolchain (without parser) took 570.76ms. Allocated memory is still 94.4MB. Free memory was 56.0MB in the beginning and 45.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. [2022-07-13 11:28:12,943 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory was 72.6MB in the beginning and 72.6MB in the end (delta: 46.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 11:28:12,944 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.17ms. Allocated memory is still 94.4MB. Free memory was 55.8MB in the beginning and 71.4MB in the end (delta: -15.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 11:28:12,944 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.45ms. Allocated memory is still 94.4MB. Free memory was 71.4MB in the beginning and 70.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 11:28:12,944 INFO L158 Benchmark]: Boogie Preprocessor took 19.97ms. Allocated memory is still 94.4MB. Free memory was 70.0MB in the beginning and 69.0MB in the end (delta: 969.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 11:28:12,945 INFO L158 Benchmark]: RCFGBuilder took 166.17ms. Allocated memory is still 94.4MB. Free memory was 69.0MB in the beginning and 59.8MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-13 11:28:12,945 INFO L158 Benchmark]: TraceAbstraction took 172.71ms. Allocated memory is still 94.4MB. Free memory was 59.2MB in the beginning and 45.5MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-13 11:28:12,946 INFO L158 Benchmark]: Witness Printer took 2.81ms. Allocated memory is still 94.4MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 121.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 11:28:12,947 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 94.4MB. Free memory was 72.6MB in the beginning and 72.6MB in the end (delta: 46.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 168.17ms. Allocated memory is still 94.4MB. Free memory was 55.8MB in the beginning and 71.4MB in the end (delta: -15.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.45ms. Allocated memory is still 94.4MB. Free memory was 71.4MB in the beginning and 70.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.97ms. Allocated memory is still 94.4MB. Free memory was 70.0MB in the beginning and 69.0MB in the end (delta: 969.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 166.17ms. Allocated memory is still 94.4MB. Free memory was 69.0MB in the beginning and 59.8MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 172.71ms. Allocated memory is still 94.4MB. Free memory was 59.2MB in the beginning and 45.5MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 2.81ms. Allocated memory is still 94.4MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 121.8kB). There was no memory consumed. 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 - UnprovableResult [Line: 36]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 33. Possible FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) VAL [n=1] [L31] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L31] RET, EXPR hanoi(n) VAL [hanoi(n)=1, n=1] [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1< 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 -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2022-07-13 11:28:14,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:28:14,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:28:14,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:28:14,955 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:28:14,961 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:28:14,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-07-13 11:28:14,998 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22e58caaf/7e5feca2f4fe4af287d2428eeaa17254/FLAGe2353fe17 [2022-07-13 11:28:15,328 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:28:15,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-07-13 11:28:15,332 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22e58caaf/7e5feca2f4fe4af287d2428eeaa17254/FLAGe2353fe17 [2022-07-13 11:28:15,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22e58caaf/7e5feca2f4fe4af287d2428eeaa17254 [2022-07-13 11:28:15,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:28:15,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:28:15,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:28:15,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:28:15,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:28:15,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:28:15" (1/1) ... [2022-07-13 11:28:15,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57bda525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:15, skipping insertion in model container [2022-07-13 11:28:15,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:28:15" (1/1) ... [2022-07-13 11:28:15,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:28:15,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:28:15,904 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2022-07-13 11:28:15,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:28:15,916 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:28:15,925 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2022-07-13 11:28:15,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:28:15,942 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:28:15,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:15 WrapperNode [2022-07-13 11:28:15,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:28:15,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:28:15,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:28:15,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:28:15,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:15" (1/1) ... [2022-07-13 11:28:15,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:15" (1/1) ... [2022-07-13 11:28:15,986 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-07-13 11:28:15,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:28:15,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:28:15,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:28:15,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:28:15,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:15" (1/1) ... [2022-07-13 11:28:15,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:15" (1/1) ... [2022-07-13 11:28:15,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:15" (1/1) ... [2022-07-13 11:28:15,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:15" (1/1) ... [2022-07-13 11:28:16,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:15" (1/1) ... [2022-07-13 11:28:16,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:15" (1/1) ... [2022-07-13 11:28:16,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:15" (1/1) ... [2022-07-13 11:28:16,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:28:16,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:28:16,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:28:16,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:28:16,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:15" (1/1) ... [2022-07-13 11:28:16,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:28:16,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:28:16,037 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) [2022-07-13 11:28:16,045 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 [2022-07-13 11:28:16,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:28:16,066 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-07-13 11:28:16,066 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-07-13 11:28:16,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:28:16,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:28:16,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-13 11:28:16,111 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:28:16,112 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:28:16,229 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:28:16,233 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:28:16,233 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 11:28:16,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:28:16 BoogieIcfgContainer [2022-07-13 11:28:16,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:28:16,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:28:16,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:28:16,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:28:16,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:28:15" (1/3) ... [2022-07-13 11:28:16,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263f0f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:28:16, skipping insertion in model container [2022-07-13 11:28:16,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:28:15" (2/3) ... [2022-07-13 11:28:16,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263f0f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:28:16, skipping insertion in model container [2022-07-13 11:28:16,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:28:16" (3/3) ... [2022-07-13 11:28:16,241 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2022-07-13 11:28:16,250 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:28:16,250 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:28:16,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:28:16,295 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5bc87a20, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2a360f3 [2022-07-13 11:28:16,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:28:16,318 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) [2022-07-13 11:28:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 11:28:16,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:16,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:28:16,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:16,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:16,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2022-07-13 11:28:16,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:16,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111466003] [2022-07-13 11:28:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:28:16,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:16,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:16,341 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:16,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-13 11:28:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:28:16,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:28:16,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:28:16,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 11:28:16,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:16,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111466003] [2022-07-13 11:28:16,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111466003] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:28:16,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:28:16,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 11:28:16,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603301441] [2022-07-13 11:28:16,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:28:16,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 11:28:16,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:16,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 11:28:16,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 11:28:16,583 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 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2022-07-13 11:28:16,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:16,665 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-07-13 11:28:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 11:28:16,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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 [2022-07-13 11:28:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:16,675 INFO L225 Difference]: With dead ends: 32 [2022-07-13 11:28:16,675 INFO L226 Difference]: Without dead ends: 16 [2022-07-13 11:28:16,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 11:28:16,681 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:16,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 51 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:28:16,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-13 11:28:16,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-13 11:28:16,710 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) [2022-07-13 11:28:16,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-07-13 11:28:16,712 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-07-13 11:28:16,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:16,712 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-07-13 11:28:16,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2022-07-13 11:28:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-07-13 11:28:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 11:28:16,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:16,714 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:28:16,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-13 11:28:16,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:16,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:16,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2022-07-13 11:28:16,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:16,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833746832] [2022-07-13 11:28:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:28:16,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:16,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:16,923 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:16,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-13 11:28:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:28:16,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 11:28:16,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 11:28:17,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:28:17,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:17,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833746832] [2022-07-13 11:28:17,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833746832] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:17,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:17,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-07-13 11:28:17,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982546171] [2022-07-13 11:28:17,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:17,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 11:28:17,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:17,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 11:28:17,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-13 11:28:17,546 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 11:28:17,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:17,788 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-07-13 11:28:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 11:28:17,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2022-07-13 11:28:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:17,789 INFO L225 Difference]: With dead ends: 28 [2022-07-13 11:28:17,789 INFO L226 Difference]: Without dead ends: 22 [2022-07-13 11:28:17,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-07-13 11:28:17,791 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:17,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 61 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-07-13 11:28:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-13 11:28:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-13 11:28:17,805 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) [2022-07-13 11:28:17,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-07-13 11:28:17,805 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-07-13 11:28:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:17,806 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-07-13 11:28:17,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 11:28:17,806 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-07-13 11:28:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 11:28:17,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:17,806 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:28:17,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-13 11:28:18,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:18,008 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:18,008 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2022-07-13 11:28:18,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:18,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484690721] [2022-07-13 11:28:18,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:28:18,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:18,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:18,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:18,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-13 11:28:18,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:28:18,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:28:18,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 11:28:18,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 11:28:18,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 11:28:19,359 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:19,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484690721] [2022-07-13 11:28:19,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484690721] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:19,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:19,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2022-07-13 11:28:19,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656701942] [2022-07-13 11:28:19,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:19,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 11:28:19,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:19,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 11:28:19,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-07-13 11:28:19,361 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-13 11:28:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:19,883 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-07-13 11:28:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 11:28:19,883 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 29 [2022-07-13 11:28:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:19,885 INFO L225 Difference]: With dead ends: 34 [2022-07-13 11:28:19,885 INFO L226 Difference]: Without dead ends: 28 [2022-07-13 11:28:19,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 11:28:19,887 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:19,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 124 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 171 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-07-13 11:28:19,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-13 11:28:19,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-13 11:28:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 11:28:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-07-13 11:28:19,892 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2022-07-13 11:28:19,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:19,892 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-07-13 11:28:19,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-13 11:28:19,893 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-07-13 11:28:19,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 11:28:19,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:19,894 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:28:19,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-13 11:28:20,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:20,104 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:20,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:20,105 INFO L85 PathProgramCache]: Analyzing trace with hash -492655308, now seen corresponding path program 3 times [2022-07-13 11:28:20,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:20,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634504887] [2022-07-13 11:28:20,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:28:20,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:20,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:20,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:20,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-13 11:28:20,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-13 11:28:20,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:28:20,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 11:28:20,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 11:28:20,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 11:28:22,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:22,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634504887] [2022-07-13 11:28:22,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634504887] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:22,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:22,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2022-07-13 11:28:22,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542626181] [2022-07-13 11:28:22,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:22,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-13 11:28:22,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:22,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-13 11:28:22,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2022-07-13 11:28:22,473 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-13 11:28:23,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:23,063 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-07-13 11:28:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 11:28:23,064 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 41 [2022-07-13 11:28:23,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:23,065 INFO L225 Difference]: With dead ends: 40 [2022-07-13 11:28:23,065 INFO L226 Difference]: Without dead ends: 34 [2022-07-13 11:28:23,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 11:28:23,066 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:23,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 185 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 194 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2022-07-13 11:28:23,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-13 11:28:23,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-07-13 11:28:23,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 11:28:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-07-13 11:28:23,070 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 41 [2022-07-13 11:28:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:23,071 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-07-13 11:28:23,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-13 11:28:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-07-13 11:28:23,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 11:28:23,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:23,072 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:28:23,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-13 11:28:23,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:23,280 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:23,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:23,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1906255628, now seen corresponding path program 4 times [2022-07-13 11:28:23,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:23,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515566655] [2022-07-13 11:28:23,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:28:23,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:23,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:23,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:23,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-13 11:28:23,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:28:23,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:28:23,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 11:28:23,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-13 11:28:23,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 11:28:26,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:26,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515566655] [2022-07-13 11:28:26,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515566655] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:26,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:26,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2022-07-13 11:28:26,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029359501] [2022-07-13 11:28:26,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:26,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-13 11:28:26,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:26,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-13 11:28:26,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 11:28:26,911 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-13 11:28:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:27,721 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-07-13 11:28:27,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 11:28:27,721 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 53 [2022-07-13 11:28:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:27,722 INFO L225 Difference]: With dead ends: 46 [2022-07-13 11:28:27,722 INFO L226 Difference]: Without dead ends: 40 [2022-07-13 11:28:27,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2022-07-13 11:28:27,724 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:27,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 299 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 338 Invalid, 0 Unknown, 289 Unchecked, 0.2s Time] [2022-07-13 11:28:27,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-13 11:28:27,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-13 11:28:27,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-13 11:28:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-07-13 11:28:27,732 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 53 [2022-07-13 11:28:27,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:27,733 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-07-13 11:28:27,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-13 11:28:27,734 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-07-13 11:28:27,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 11:28:27,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:27,739 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:28:27,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:28:27,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:27,947 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:27,948 INFO L85 PathProgramCache]: Analyzing trace with hash 788849844, now seen corresponding path program 5 times [2022-07-13 11:28:27,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:27,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108919582] [2022-07-13 11:28:27,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 11:28:27,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:27,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:27,949 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:27,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-13 11:28:28,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-13 11:28:28,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:28:28,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 11:28:28,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-13 11:28:28,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 11:28:32,784 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:32,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108919582] [2022-07-13 11:28:32,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108919582] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:32,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:32,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2022-07-13 11:28:32,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800482156] [2022-07-13 11:28:32,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:32,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-13 11:28:32,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:32,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-13 11:28:32,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2022-07-13 11:28:32,792 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2022-07-13 11:28:33,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:33,873 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-07-13 11:28:33,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 11:28:33,873 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) Word has length 65 [2022-07-13 11:28:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:33,874 INFO L225 Difference]: With dead ends: 52 [2022-07-13 11:28:33,874 INFO L226 Difference]: Without dead ends: 46 [2022-07-13 11:28:33,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2022-07-13 11:28:33,876 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 456 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:33,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 364 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 370 Invalid, 0 Unknown, 456 Unchecked, 0.3s Time] [2022-07-13 11:28:33,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-13 11:28:33,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-13 11:28:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-13 11:28:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-07-13 11:28:33,881 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 65 [2022-07-13 11:28:33,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:33,881 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-07-13 11:28:33,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2022-07-13 11:28:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-07-13 11:28:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-13 11:28:33,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:33,882 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:28:33,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:28:34,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:34,083 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:34,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1302253684, now seen corresponding path program 6 times [2022-07-13 11:28:34,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:34,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900102058] [2022-07-13 11:28:34,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 11:28:34,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:34,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:34,085 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:34,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-13 11:28:34,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-13 11:28:34,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:28:34,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-13 11:28:34,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-13 11:28:34,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-13 11:28:40,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:40,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900102058] [2022-07-13 11:28:40,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900102058] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:40,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:40,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39] total 66 [2022-07-13 11:28:40,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230031156] [2022-07-13 11:28:40,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:40,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 11:28:40,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:40,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 11:28:40,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 11:28:40,834 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2022-07-13 11:28:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:42,277 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-07-13 11:28:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 11:28:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) Word has length 77 [2022-07-13 11:28:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:42,279 INFO L225 Difference]: With dead ends: 58 [2022-07-13 11:28:42,279 INFO L226 Difference]: Without dead ends: 52 [2022-07-13 11:28:42,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2022-07-13 11:28:42,281 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 650 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:42,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 647 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 629 Invalid, 0 Unknown, 650 Unchecked, 0.3s Time] [2022-07-13 11:28:42,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-13 11:28:42,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-13 11:28:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2022-07-13 11:28:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-07-13 11:28:42,286 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 77 [2022-07-13 11:28:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:42,287 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-07-13 11:28:42,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2022-07-13 11:28:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-07-13 11:28:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-13 11:28:42,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:42,288 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:28:42,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-13 11:28:42,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:42,495 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1287742412, now seen corresponding path program 7 times [2022-07-13 11:28:42,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:42,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903267525] [2022-07-13 11:28:42,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 11:28:42,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:42,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:42,498 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:42,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-13 11:28:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:28:42,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-13 11:28:42,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-07-13 11:28:43,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:28:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-13 11:28:50,982 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:28:50,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903267525] [2022-07-13 11:28:50,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903267525] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:28:50,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:28:50,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45] total 76 [2022-07-13 11:28:50,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021597407] [2022-07-13 11:28:50,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:28:50,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-13 11:28:50,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:28:50,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-13 11:28:50,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2022-07-13 11:28:50,985 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2022-07-13 11:28:52,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:28:52,787 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-07-13 11:28:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 11:28:52,789 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) Word has length 89 [2022-07-13 11:28:52,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:28:52,790 INFO L225 Difference]: With dead ends: 64 [2022-07-13 11:28:52,790 INFO L226 Difference]: Without dead ends: 58 [2022-07-13 11:28:52,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2022-07-13 11:28:52,792 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 127 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 792 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:28:52,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 774 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 710 Invalid, 0 Unknown, 792 Unchecked, 0.4s Time] [2022-07-13 11:28:52,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-13 11:28:52,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-07-13 11:28:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-13 11:28:52,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-07-13 11:28:52,797 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 89 [2022-07-13 11:28:52,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:28:52,798 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-07-13 11:28:52,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2022-07-13 11:28:52,798 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-07-13 11:28:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-13 11:28:52,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:28:52,799 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:28:52,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-13 11:28:53,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:28:53,021 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:28:53,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:28:53,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1760839668, now seen corresponding path program 8 times [2022-07-13 11:28:53,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:28:53,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896418870] [2022-07-13 11:28:53,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:28:53,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:28:53,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:28:53,022 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:28:53,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-13 11:28:53,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:28:53,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:28:53,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-13 11:28:53,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:28:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-07-13 11:28:53,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:29:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-13 11:29:03,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:29:03,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896418870] [2022-07-13 11:29:03,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896418870] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:29:03,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:29:03,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51] total 86 [2022-07-13 11:29:03,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486130178] [2022-07-13 11:29:03,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:29:03,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-13 11:29:03,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:29:03,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-13 11:29:03,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2022-07-13 11:29:03,953 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2022-07-13 11:29:06,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:06,148 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-07-13 11:29:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 11:29:06,149 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) Word has length 101 [2022-07-13 11:29:06,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:06,150 INFO L225 Difference]: With dead ends: 70 [2022-07-13 11:29:06,150 INFO L226 Difference]: Without dead ends: 64 [2022-07-13 11:29:06,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2022-07-13 11:29:06,155 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 123 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1169 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:06,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 885 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 800 Invalid, 0 Unknown, 1169 Unchecked, 0.4s Time] [2022-07-13 11:29:06,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-13 11:29:06,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-07-13 11:29:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2022-07-13 11:29:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-07-13 11:29:06,160 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 101 [2022-07-13 11:29:06,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:06,161 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-07-13 11:29:06,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2022-07-13 11:29:06,161 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-07-13 11:29:06,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-13 11:29:06,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:06,162 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:06,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-13 11:29:06,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:29:06,371 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:06,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:06,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1211116620, now seen corresponding path program 9 times [2022-07-13 11:29:06,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:29:06,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755298315] [2022-07-13 11:29:06,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:29:06,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:29:06,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:29:06,373 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:29:06,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-13 11:29:06,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-13 11:29:06,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:29:06,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-13 11:29:06,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:29:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-07-13 11:29:07,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:29:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-13 11:29:19,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:29:19,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755298315] [2022-07-13 11:29:19,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755298315] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:29:19,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:29:19,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57] total 96 [2022-07-13 11:29:19,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390131161] [2022-07-13 11:29:19,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:29:19,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-13 11:29:19,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:29:19,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-13 11:29:19,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=8773, Unknown=0, NotChecked=0, Total=9120 [2022-07-13 11:29:19,939 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2022-07-13 11:29:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:22,282 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2022-07-13 11:29:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 11:29:22,283 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) Word has length 113 [2022-07-13 11:29:22,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:22,284 INFO L225 Difference]: With dead ends: 71 [2022-07-13 11:29:22,284 INFO L226 Difference]: Without dead ends: 67 [2022-07-13 11:29:22,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1185, Invalid=15845, Unknown=0, NotChecked=0, Total=17030 [2022-07-13 11:29:22,285 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 377 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 2890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1314 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:22,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 1183 Invalid, 2890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 1012 Invalid, 0 Unknown, 1314 Unchecked, 0.6s Time] [2022-07-13 11:29:22,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-13 11:29:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-07-13 11:29:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 46 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-13 11:29:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-07-13 11:29:22,290 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 113 [2022-07-13 11:29:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:22,290 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-07-13 11:29:22,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2022-07-13 11:29:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-07-13 11:29:22,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-13 11:29:22,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:22,292 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:22,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-13 11:29:22,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:29:22,499 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:22,499 INFO L85 PathProgramCache]: Analyzing trace with hash 79612228, now seen corresponding path program 10 times [2022-07-13 11:29:22,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:29:22,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518549816] [2022-07-13 11:29:22,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:29:22,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:29:22,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:29:22,501 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:29:22,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-13 11:29:22,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:29:22,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:29:22,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-13 11:29:22,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:29:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-07-13 11:29:23,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:29:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-13 11:29:37,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:29:37,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518549816] [2022-07-13 11:29:37,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518549816] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:29:37,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:29:37,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 60] total 101 [2022-07-13 11:29:37,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357359271] [2022-07-13 11:29:37,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:29:37,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-07-13 11:29:37,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:29:37,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-07-13 11:29:37,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=9734, Unknown=0, NotChecked=0, Total=10100 [2022-07-13 11:29:37,630 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 101 states, 100 states have (on average 1.24) internal successors, (124), 63 states have internal predecessors, (124), 21 states have call successors, (21), 1 states have call predecessors, (21), 38 states have return successors, (38), 38 states have call predecessors, (38), 21 states have call successors, (38) [2022-07-13 11:29:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:29:42,907 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2022-07-13 11:29:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-13 11:29:42,908 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 1.24) internal successors, (124), 63 states have internal predecessors, (124), 21 states have call successors, (21), 1 states have call predecessors, (21), 38 states have return successors, (38), 38 states have call predecessors, (38), 21 states have call successors, (38) Word has length 119 [2022-07-13 11:29:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:29:42,909 INFO L225 Difference]: With dead ends: 79 [2022-07-13 11:29:42,909 INFO L226 Difference]: Without dead ends: 73 [2022-07-13 11:29:42,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1011, Invalid=19295, Unknown=0, NotChecked=0, Total=20306 [2022-07-13 11:29:42,911 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 221 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1179 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:29:42,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1339 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1118 Invalid, 0 Unknown, 1179 Unchecked, 0.6s Time] [2022-07-13 11:29:42,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-13 11:29:42,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-07-13 11:29:42,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 50 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-13 11:29:42,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-07-13 11:29:42,917 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 119 [2022-07-13 11:29:42,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:29:42,917 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-07-13 11:29:42,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 1.24) internal successors, (124), 63 states have internal predecessors, (124), 21 states have call successors, (21), 1 states have call predecessors, (21), 38 states have return successors, (38), 38 states have call predecessors, (38), 21 states have call successors, (38) [2022-07-13 11:29:42,917 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-07-13 11:29:42,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-13 11:29:42,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:29:42,918 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:29:42,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-13 11:29:43,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:29:43,126 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:29:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:29:43,126 INFO L85 PathProgramCache]: Analyzing trace with hash 720478468, now seen corresponding path program 11 times [2022-07-13 11:29:43,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:29:43,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783011739] [2022-07-13 11:29:43,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 11:29:43,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:29:43,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:29:43,128 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:29:43,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-13 11:29:43,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-07-13 11:29:43,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:29:43,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-13 11:29:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:29:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-07-13 11:29:44,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:30:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-07-13 11:30:01,017 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:30:01,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783011739] [2022-07-13 11:30:01,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783011739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:30:01,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:30:01,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 66] total 111 [2022-07-13 11:30:01,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659911552] [2022-07-13 11:30:01,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:30:01,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-07-13 11:30:01,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:30:01,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-07-13 11:30:01,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=11806, Unknown=0, NotChecked=0, Total=12210 [2022-07-13 11:30:01,019 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 111 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 69 states have internal predecessors, (136), 23 states have call successors, (23), 1 states have call predecessors, (23), 42 states have return successors, (42), 42 states have call predecessors, (42), 23 states have call successors, (42) [2022-07-13 11:30:04,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:30:04,157 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-07-13 11:30:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-13 11:30:04,157 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 69 states have internal predecessors, (136), 23 states have call successors, (23), 1 states have call predecessors, (23), 42 states have return successors, (42), 42 states have call predecessors, (42), 23 states have call successors, (42) Word has length 131 [2022-07-13 11:30:04,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:30:04,158 INFO L225 Difference]: With dead ends: 80 [2022-07-13 11:30:04,158 INFO L226 Difference]: Without dead ends: 76 [2022-07-13 11:30:04,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1509, Invalid=21443, Unknown=0, NotChecked=0, Total=22952 [2022-07-13 11:30:04,160 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 3314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1798 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:30:04,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1626 Invalid, 3314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1409 Invalid, 0 Unknown, 1798 Unchecked, 0.6s Time] [2022-07-13 11:30:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-13 11:30:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-07-13 11:30:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 52 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2022-07-13 11:30:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-07-13 11:30:04,167 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 131 [2022-07-13 11:30:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:30:04,167 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-07-13 11:30:04,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 69 states have internal predecessors, (136), 23 states have call successors, (23), 1 states have call predecessors, (23), 42 states have return successors, (42), 42 states have call predecessors, (42), 23 states have call successors, (42) [2022-07-13 11:30:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-07-13 11:30:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-13 11:30:04,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:30:04,169 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:30:04,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-13 11:30:04,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:30:04,377 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:30:04,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:30:04,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2059891916, now seen corresponding path program 12 times [2022-07-13 11:30:04,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:30:04,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395367421] [2022-07-13 11:30:04,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 11:30:04,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:30:04,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:30:04,380 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:30:04,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-13 11:30:04,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-07-13 11:30:04,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:30:04,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-13 11:30:04,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:30:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-07-13 11:30:05,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:30:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-13 11:30:23,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:30:23,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395367421] [2022-07-13 11:30:23,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395367421] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:30:23,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:30:23,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69] total 116 [2022-07-13 11:30:23,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976607653] [2022-07-13 11:30:23,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:30:23,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-13 11:30:23,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:30:23,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-13 11:30:23,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=12917, Unknown=0, NotChecked=0, Total=13340 [2022-07-13 11:30:23,935 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) [2022-07-13 11:30:27,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:30:27,535 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2022-07-13 11:30:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-13 11:30:27,536 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) Word has length 137 [2022-07-13 11:30:27,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:30:27,537 INFO L225 Difference]: With dead ends: 88 [2022-07-13 11:30:27,537 INFO L226 Difference]: Without dead ends: 82 [2022-07-13 11:30:27,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1730, Invalid=24676, Unknown=0, NotChecked=0, Total=26406 [2022-07-13 11:30:27,538 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 3732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2058 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 11:30:27,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1719 Invalid, 3732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1398 Invalid, 0 Unknown, 2058 Unchecked, 0.6s Time] [2022-07-13 11:30:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-13 11:30:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-07-13 11:30:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.018181818181818) internal successors, (56), 56 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2022-07-13 11:30:27,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-07-13 11:30:27,543 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 137 [2022-07-13 11:30:27,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:30:27,543 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-07-13 11:30:27,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) [2022-07-13 11:30:27,544 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-07-13 11:30:27,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-13 11:30:27,544 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:30:27,545 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:30:27,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-13 11:30:27,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:30:27,751 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:30:27,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:30:27,752 INFO L85 PathProgramCache]: Analyzing trace with hash -706365708, now seen corresponding path program 13 times [2022-07-13 11:30:27,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:30:27,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198057353] [2022-07-13 11:30:27,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 11:30:27,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:30:27,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:30:27,753 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:30:27,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-13 11:30:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:30:27,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-13 11:30:27,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:30:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-07-13 11:30:29,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:30:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-07-13 11:30:49,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:30:49,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198057353] [2022-07-13 11:30:49,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198057353] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:30:49,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:30:49,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 75] total 126 [2022-07-13 11:30:49,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682221767] [2022-07-13 11:30:49,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:30:49,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-07-13 11:30:49,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:30:49,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-07-13 11:30:49,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=15289, Unknown=0, NotChecked=0, Total=15750 [2022-07-13 11:30:49,762 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) [2022-07-13 11:30:54,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:30:54,095 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-07-13 11:30:54,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-13 11:30:54,096 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) Word has length 149 [2022-07-13 11:30:54,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:30:54,096 INFO L225 Difference]: With dead ends: 94 [2022-07-13 11:30:54,097 INFO L226 Difference]: Without dead ends: 88 [2022-07-13 11:30:54,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4102 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=1982, Invalid=29170, Unknown=0, NotChecked=0, Total=31152 [2022-07-13 11:30:54,098 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 558 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 953 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 5133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 953 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2382 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 11:30:54,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1860 Invalid, 5133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [953 Valid, 1798 Invalid, 0 Unknown, 2382 Unchecked, 0.9s Time] [2022-07-13 11:30:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-13 11:30:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-07-13 11:30:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 60 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2022-07-13 11:30:54,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-07-13 11:30:54,103 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 149 [2022-07-13 11:30:54,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:30:54,103 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-07-13 11:30:54,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) [2022-07-13 11:30:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-07-13 11:30:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-13 11:30:54,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:30:54,104 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:30:54,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-13 11:30:54,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:30:54,311 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:30:54,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:30:54,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1677247156, now seen corresponding path program 14 times [2022-07-13 11:30:54,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:30:54,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624108886] [2022-07-13 11:30:54,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:30:54,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:30:54,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:30:54,313 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:30:54,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-13 11:30:54,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:30:54,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:30:54,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 108 conjunts are in the unsatisfiable core [2022-07-13 11:30:54,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:30:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-07-13 11:30:55,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:31:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-07-13 11:31:20,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:31:20,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624108886] [2022-07-13 11:31:20,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624108886] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:31:20,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:31:20,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 81] total 136 [2022-07-13 11:31:20,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925776855] [2022-07-13 11:31:20,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:31:20,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-07-13 11:31:20,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:31:20,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-07-13 11:31:20,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=17861, Unknown=0, NotChecked=0, Total=18360 [2022-07-13 11:31:20,193 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) [2022-07-13 11:31:25,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:31:25,230 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-07-13 11:31:25,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-13 11:31:25,230 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) Word has length 161 [2022-07-13 11:31:25,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:31:25,231 INFO L225 Difference]: With dead ends: 100 [2022-07-13 11:31:25,231 INFO L226 Difference]: Without dead ends: 94 [2022-07-13 11:31:25,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4781 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=2250, Invalid=34040, Unknown=0, NotChecked=0, Total=36290 [2022-07-13 11:31:25,234 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 510 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 837 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 2341 SdHoareTripleChecker+Invalid, 6040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 837 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2731 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:31:25,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 2341 Invalid, 6040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [837 Valid, 2472 Invalid, 0 Unknown, 2731 Unchecked, 1.0s Time] [2022-07-13 11:31:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-13 11:31:25,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-13 11:31:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 64 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 28 states have return successors, (29), 28 states have call predecessors, (29), 2 states have call successors, (29) [2022-07-13 11:31:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-07-13 11:31:25,238 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 161 [2022-07-13 11:31:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:31:25,238 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-07-13 11:31:25,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) [2022-07-13 11:31:25,238 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-07-13 11:31:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-13 11:31:25,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:31:25,239 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:31:25,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-13 11:31:25,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:31:25,451 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:31:25,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:31:25,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1199460748, now seen corresponding path program 15 times [2022-07-13 11:31:25,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:31:25,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774572892] [2022-07-13 11:31:25,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:31:25,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:31:25,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:31:25,453 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:31:25,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-13 11:31:25,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-07-13 11:31:25,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:31:25,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 116 conjunts are in the unsatisfiable core [2022-07-13 11:31:25,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:31:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2022-07-13 11:31:27,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:31:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-07-13 11:31:54,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-13 11:31:54,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774572892] [2022-07-13 11:31:54,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774572892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:31:54,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 11:31:54,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 87] total 146 [2022-07-13 11:31:54,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310332472] [2022-07-13 11:31:54,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 11:31:54,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-07-13 11:31:54,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-13 11:31:54,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-07-13 11:31:54,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=20633, Unknown=0, NotChecked=0, Total=21170 [2022-07-13 11:31:54,874 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 90 states have internal predecessors, (178), 30 states have call successors, (30), 1 states have call predecessors, (30), 56 states have return successors, (56), 56 states have call predecessors, (56), 30 states have call successors, (56) [2022-07-13 11:32:00,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:32:00,375 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2022-07-13 11:32:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-13 11:32:00,376 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 90 states have internal predecessors, (178), 30 states have call successors, (30), 1 states have call predecessors, (30), 56 states have return successors, (56), 56 states have call predecessors, (56), 30 states have call successors, (56) Word has length 173 [2022-07-13 11:32:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:32:00,376 INFO L225 Difference]: With dead ends: 106 [2022-07-13 11:32:00,376 INFO L226 Difference]: Without dead ends: 100 [2022-07-13 11:32:00,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=2534, Invalid=39286, Unknown=0, NotChecked=0, Total=41820 [2022-07-13 11:32:00,379 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 575 mSDsluCounter, 2400 mSDsCounter, 0 mSdLazyCounter, 2034 mSolverCounterSat, 925 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 2435 SdHoareTripleChecker+Invalid, 6205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 2034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3246 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:32:00,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 2435 Invalid, 6205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 2034 Invalid, 0 Unknown, 3246 Unchecked, 1.0s Time] [2022-07-13 11:32:00,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-13 11:32:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-07-13 11:32:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 68 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (31), 30 states have call predecessors, (31), 2 states have call successors, (31) [2022-07-13 11:32:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-07-13 11:32:00,383 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 173 [2022-07-13 11:32:00,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:32:00,383 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-07-13 11:32:00,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 90 states have internal predecessors, (178), 30 states have call successors, (30), 1 states have call predecessors, (30), 56 states have return successors, (56), 56 states have call predecessors, (56), 30 states have call successors, (56) [2022-07-13 11:32:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-07-13 11:32:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-13 11:32:00,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:32:00,384 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:32:00,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-13 11:32:00,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-13 11:32:00,591 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:32:00,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:32:00,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1668253132, now seen corresponding path program 16 times [2022-07-13 11:32:00,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-13 11:32:00,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219439281] [2022-07-13 11:32:00,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:32:00,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-13 11:32:00,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-13 11:32:00,593 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-13 11:32:00,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-13 11:32:00,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:32:00,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:32:00,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 124 conjunts are in the unsatisfiable core [2022-07-13 11:32:00,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:32:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2022-07-13 11:32:02,684 INFO L328 TraceCheckSpWp]: Computing backward predicates...