./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eb57cc67b4a5d1052a722feccb00a81098424cf4bc0bbd7bfe756405ab740d43 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 05:07:40,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 05:07:40,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 05:07:40,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 05:07:40,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 05:07:40,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 05:07:40,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 05:07:40,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 05:07:40,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 05:07:40,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 05:07:40,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 05:07:40,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 05:07:40,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 05:07:40,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 05:07:40,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 05:07:40,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 05:07:40,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 05:07:40,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 05:07:40,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 05:07:40,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 05:07:40,700 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 05:07:40,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 05:07:40,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 05:07:40,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 05:07:40,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 05:07:40,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 05:07:40,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 05:07:40,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 05:07:40,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 05:07:40,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 05:07:40,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 05:07:40,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 05:07:40,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 05:07:40,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 05:07:40,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 05:07:40,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 05:07:40,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 05:07:40,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 05:07:40,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 05:07:40,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 05:07:40,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 05:07:40,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 05:07:40,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 05:07:40,761 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 05:07:40,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 05:07:40,762 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 05:07:40,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 05:07:40,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 05:07:40,763 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 05:07:40,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 05:07:40,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 05:07:40,764 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 05:07:40,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 05:07:40,764 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 05:07:40,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 05:07:40,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 05:07:40,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 05:07:40,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 05:07:40,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 05:07:40,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 05:07:40,766 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 05:07:40,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 05:07:40,766 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 05:07:40,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 05:07:40,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 05:07:40,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 05:07:40,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 05:07:40,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:07:40,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 05:07:40,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 05:07:40,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 05:07:40,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 05:07:40,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 05:07:40,768 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 05:07:40,769 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 05:07:40,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 05:07:40,769 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb57cc67b4a5d1052a722feccb00a81098424cf4bc0bbd7bfe756405ab740d43 [2022-07-21 05:07:41,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 05:07:41,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 05:07:41,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 05:07:41,036 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 05:07:41,037 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 05:07:41,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2022-07-21 05:07:41,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/911a9aa57/9514d34f7dc544528522747e23f9d138/FLAG9f6558ef4 [2022-07-21 05:07:41,423 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 05:07:41,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2022-07-21 05:07:41,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/911a9aa57/9514d34f7dc544528522747e23f9d138/FLAG9f6558ef4 [2022-07-21 05:07:41,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/911a9aa57/9514d34f7dc544528522747e23f9d138 [2022-07-21 05:07:41,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 05:07:41,445 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 05:07:41,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 05:07:41,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 05:07:41,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 05:07:41,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:07:41" (1/1) ... [2022-07-21 05:07:41,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@856bdfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:07:41, skipping insertion in model container [2022-07-21 05:07:41,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:07:41" (1/1) ... [2022-07-21 05:07:41,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 05:07:41,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 05:07:41,602 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/recursive-simple/fibo_2calls_5-2.c[946,959] [2022-07-21 05:07:41,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:07:41,611 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 05:07:41,624 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/recursive-simple/fibo_2calls_5-2.c[946,959] [2022-07-21 05:07:41,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:07:41,638 INFO L208 MainTranslator]: Completed translation [2022-07-21 05:07:41,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:07:41 WrapperNode [2022-07-21 05:07:41,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 05:07:41,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 05:07:41,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 05:07:41,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 05:07:41,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:07:41" (1/1) ... [2022-07-21 05:07:41,659 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:07:41" (1/1) ... [2022-07-21 05:07:41,669 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-07-21 05:07:41,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 05:07:41,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 05:07:41,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 05:07:41,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 05:07:41,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:07:41" (1/1) ... [2022-07-21 05:07:41,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:07:41" (1/1) ... [2022-07-21 05:07:41,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:07:41" (1/1) ... [2022-07-21 05:07:41,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:07:41" (1/1) ... [2022-07-21 05:07:41,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:07:41" (1/1) ... [2022-07-21 05:07:41,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:07:41" (1/1) ... [2022-07-21 05:07:41,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:07:41" (1/1) ... [2022-07-21 05:07:41,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 05:07:41,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 05:07:41,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 05:07:41,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 05:07:41,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:07:41" (1/1) ... [2022-07-21 05:07:41,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:07:41,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:07:41,723 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) [2022-07-21 05:07:41,742 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 [2022-07-21 05:07:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 05:07:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 05:07:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-07-21 05:07:41,755 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-07-21 05:07:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-07-21 05:07:41,755 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-07-21 05:07:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 05:07:41,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 05:07:41,804 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 05:07:41,805 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 05:07:41,910 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 05:07:41,914 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 05:07:41,915 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 05:07:41,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:07:41 BoogieIcfgContainer [2022-07-21 05:07:41,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 05:07:41,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 05:07:41,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 05:07:41,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 05:07:41,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:07:41" (1/3) ... [2022-07-21 05:07:41,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e40f740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:07:41, skipping insertion in model container [2022-07-21 05:07:41,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:07:41" (2/3) ... [2022-07-21 05:07:41,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e40f740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:07:41, skipping insertion in model container [2022-07-21 05:07:41,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:07:41" (3/3) ... [2022-07-21 05:07:41,922 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2022-07-21 05:07:41,931 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 05:07:41,931 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 05:07:41,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 05:07:41,979 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@7af805be, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@92f9e8b [2022-07-21 05:07:41,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 05:07:41,982 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 05:07:41,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 05:07:41,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:07:41,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:07:41,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:07:41,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:07:41,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2022-07-21 05:07:41,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:07:41,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390399264] [2022-07-21 05:07:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:41,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:07:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:42,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:07:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:07:42,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:07:42,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390399264] [2022-07-21 05:07:42,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390399264] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:07:42,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:07:42,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:07:42,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229405388] [2022-07-21 05:07:42,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:07:42,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:07:42,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:07:42,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:07:42,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:07:42,184 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-07-21 05:07:42,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:07:42,217 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-07-21 05:07:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:07:42,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 10 [2022-07-21 05:07:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:07:42,238 INFO L225 Difference]: With dead ends: 43 [2022-07-21 05:07:42,238 INFO L226 Difference]: Without dead ends: 27 [2022-07-21 05:07:42,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:07:42,245 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:07:42,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 123 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:07:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-21 05:07:42,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-21 05:07:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-21 05:07:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-07-21 05:07:42,279 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2022-07-21 05:07:42,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:07:42,279 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-07-21 05:07:42,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-07-21 05:07:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-07-21 05:07:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 05:07:42,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:07:42,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:07:42,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 05:07:42,282 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:07:42,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:07:42,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2022-07-21 05:07:42,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:07:42,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026024686] [2022-07-21 05:07:42,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:42,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:07:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:42,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:07:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:07:42,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:07:42,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026024686] [2022-07-21 05:07:42,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026024686] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:07:42,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:07:42,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:07:42,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428119789] [2022-07-21 05:07:42,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:07:42,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:07:42,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:07:42,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:07:42,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:07:42,364 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2022-07-21 05:07:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:07:42,394 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-07-21 05:07:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:07:42,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 [2022-07-21 05:07:42,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:07:42,396 INFO L225 Difference]: With dead ends: 33 [2022-07-21 05:07:42,397 INFO L226 Difference]: Without dead ends: 29 [2022-07-21 05:07:42,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:07:42,398 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:07:42,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:07:42,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-21 05:07:42,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-07-21 05:07:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-21 05:07:42,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-07-21 05:07:42,408 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2022-07-21 05:07:42,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:07:42,409 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-07-21 05:07:42,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2022-07-21 05:07:42,410 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-07-21 05:07:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 05:07:42,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:07:42,412 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:07:42,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 05:07:42,412 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:07:42,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:07:42,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2022-07-21 05:07:42,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:07:42,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998741845] [2022-07-21 05:07:42,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:42,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:07:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:42,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:07:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:42,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:42,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 05:07:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 05:07:42,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:07:42,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998741845] [2022-07-21 05:07:42,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998741845] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:07:42,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352005227] [2022-07-21 05:07:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:42,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:42,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:07:42,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:07:42,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 05:07:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:42,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 05:07:42,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:07:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 05:07:42,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:07:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 05:07:42,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352005227] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:07:42,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:07:42,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2022-07-21 05:07:42,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133836198] [2022-07-21 05:07:42,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:07:42,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 05:07:42,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:07:42,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 05:07:42,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-21 05:07:42,838 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 05:07:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:07:42,995 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2022-07-21 05:07:42,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 05:07:42,996 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2022-07-21 05:07:42,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:07:42,997 INFO L225 Difference]: With dead ends: 55 [2022-07-21 05:07:42,997 INFO L226 Difference]: Without dead ends: 31 [2022-07-21 05:07:42,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-21 05:07:42,998 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:07:42,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 112 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:07:42,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-21 05:07:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-07-21 05:07:43,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 05:07:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-07-21 05:07:43,004 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2022-07-21 05:07:43,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:07:43,004 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-07-21 05:07:43,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 05:07:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-07-21 05:07:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 05:07:43,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:07:43,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:07:43,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 05:07:43,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:43,222 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:07:43,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:07:43,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2022-07-21 05:07:43,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:07:43,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862592258] [2022-07-21 05:07:43,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:43,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:07:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:43,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:07:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:43,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:43,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 05:07:43,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:07:43,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862592258] [2022-07-21 05:07:43,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862592258] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:07:43,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091115903] [2022-07-21 05:07:43,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:43,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:43,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:07:43,316 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:07:43,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 05:07:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:43,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 05:07:43,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:07:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 05:07:43,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:07:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 05:07:43,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091115903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:07:43,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:07:43,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-07-21 05:07:43,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571943016] [2022-07-21 05:07:43,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:07:43,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 05:07:43,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:07:43,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 05:07:43,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-07-21 05:07:43,539 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 05:07:43,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:07:43,669 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2022-07-21 05:07:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 05:07:43,669 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2022-07-21 05:07:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:07:43,675 INFO L225 Difference]: With dead ends: 51 [2022-07-21 05:07:43,675 INFO L226 Difference]: Without dead ends: 47 [2022-07-21 05:07:43,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-21 05:07:43,678 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:07:43,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 92 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:07:43,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-21 05:07:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-07-21 05:07:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-07-21 05:07:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-07-21 05:07:43,690 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2022-07-21 05:07:43,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:07:43,691 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-07-21 05:07:43,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 05:07:43,691 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-07-21 05:07:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 05:07:43,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:07:43,692 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:07:43,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 05:07:43,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 05:07:43,913 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:07:43,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:07:43,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2022-07-21 05:07:43,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:07:43,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485718706] [2022-07-21 05:07:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:43,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:07:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:43,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:07:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:43,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:43,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:43,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-21 05:07:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:43,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-21 05:07:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 05:07:43,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:07:43,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485718706] [2022-07-21 05:07:43,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485718706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:07:43,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931526400] [2022-07-21 05:07:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:43,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:43,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:07:43,987 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:07:43,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 05:07:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:44,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 05:07:44,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:07:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 05:07:44,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:07:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 05:07:44,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931526400] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:07:44,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:07:44,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2022-07-21 05:07:44,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962333801] [2022-07-21 05:07:44,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:07:44,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 05:07:44,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:07:44,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 05:07:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-07-21 05:07:44,345 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2022-07-21 05:07:44,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:07:44,523 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2022-07-21 05:07:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 05:07:44,523 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2022-07-21 05:07:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:07:44,525 INFO L225 Difference]: With dead ends: 105 [2022-07-21 05:07:44,525 INFO L226 Difference]: Without dead ends: 63 [2022-07-21 05:07:44,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-07-21 05:07:44,529 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:07:44,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 95 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:07:44,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-21 05:07:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-21 05:07:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2022-07-21 05:07:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2022-07-21 05:07:44,538 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2022-07-21 05:07:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:07:44,539 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2022-07-21 05:07:44,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2022-07-21 05:07:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2022-07-21 05:07:44,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 05:07:44,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:07:44,540 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:07:44,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 05:07:44,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:44,751 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:07:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:07:44,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2022-07-21 05:07:44,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:07:44,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087175647] [2022-07-21 05:07:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:44,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:07:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:44,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:07:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:44,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:44,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:44,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:44,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:07:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 05:07:44,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:07:44,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087175647] [2022-07-21 05:07:44,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087175647] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:07:44,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38959887] [2022-07-21 05:07:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:44,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:44,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:07:44,826 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:07:44,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 05:07:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:44,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 05:07:44,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:07:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 05:07:44,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:07:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 05:07:45,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38959887] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:07:45,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:07:45,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2022-07-21 05:07:45,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490337554] [2022-07-21 05:07:45,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:07:45,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 05:07:45,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:07:45,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 05:07:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-07-21 05:07:45,137 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2022-07-21 05:07:45,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:07:45,425 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2022-07-21 05:07:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 05:07:45,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2022-07-21 05:07:45,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:07:45,428 INFO L225 Difference]: With dead ends: 177 [2022-07-21 05:07:45,428 INFO L226 Difference]: Without dead ends: 117 [2022-07-21 05:07:45,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-07-21 05:07:45,429 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:07:45,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 222 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:07:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-21 05:07:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2022-07-21 05:07:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2022-07-21 05:07:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2022-07-21 05:07:45,459 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2022-07-21 05:07:45,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:07:45,461 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2022-07-21 05:07:45,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2022-07-21 05:07:45,462 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2022-07-21 05:07:45,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 05:07:45,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:07:45,467 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:07:45,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 05:07:45,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:45,678 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:07:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:07:45,678 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2022-07-21 05:07:45,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:07:45,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832196019] [2022-07-21 05:07:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:45,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:07:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:45,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:07:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:45,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:45,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:45,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:45,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:45,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:07:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:45,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:07:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 05:07:45,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:07:45,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832196019] [2022-07-21 05:07:45,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832196019] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:07:45,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508700121] [2022-07-21 05:07:45,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:45,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:45,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:07:45,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:07:45,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 05:07:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:45,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 05:07:45,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:07:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 05:07:45,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:07:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 05:07:46,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508700121] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:07:46,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:07:46,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 19 [2022-07-21 05:07:46,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290604502] [2022-07-21 05:07:46,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:07:46,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 05:07:46,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:07:46,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 05:07:46,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-07-21 05:07:46,225 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2022-07-21 05:07:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:07:46,525 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2022-07-21 05:07:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 05:07:46,525 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) Word has length 51 [2022-07-21 05:07:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:07:46,527 INFO L225 Difference]: With dead ends: 255 [2022-07-21 05:07:46,527 INFO L226 Difference]: Without dead ends: 155 [2022-07-21 05:07:46,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-07-21 05:07:46,529 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 100 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:07:46,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 158 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:07:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-21 05:07:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2022-07-21 05:07:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 24 states have call successors, (24), 9 states have call predecessors, (24), 13 states have return successors, (66), 27 states have call predecessors, (66), 24 states have call successors, (66) [2022-07-21 05:07:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2022-07-21 05:07:46,543 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2022-07-21 05:07:46,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:07:46,543 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2022-07-21 05:07:46,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2022-07-21 05:07:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2022-07-21 05:07:46,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 05:07:46,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:07:46,546 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:07:46,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 05:07:46,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:46,765 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:07:46,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:07:46,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1851863125, now seen corresponding path program 1 times [2022-07-21 05:07:46,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:07:46,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897477001] [2022-07-21 05:07:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:46,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:07:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:46,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:07:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:46,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:46,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:46,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:46,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:46,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:46,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:07:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:46,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 05:07:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:46,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-21 05:07:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:46,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:46,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-21 05:07:46,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:07:46,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897477001] [2022-07-21 05:07:46,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897477001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:07:46,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845889297] [2022-07-21 05:07:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:46,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:46,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:07:46,914 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:07:46,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 05:07:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:46,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 05:07:46,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:07:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-21 05:07:47,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:07:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-21 05:07:47,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845889297] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:07:47,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:07:47,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 19 [2022-07-21 05:07:47,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442986441] [2022-07-21 05:07:47,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:07:47,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 05:07:47,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:07:47,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 05:07:47,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-07-21 05:07:47,271 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-21 05:07:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:07:47,536 INFO L93 Difference]: Finished difference Result 241 states and 471 transitions. [2022-07-21 05:07:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 05:07:47,536 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) Word has length 79 [2022-07-21 05:07:47,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:07:47,538 INFO L225 Difference]: With dead ends: 241 [2022-07-21 05:07:47,538 INFO L226 Difference]: Without dead ends: 120 [2022-07-21 05:07:47,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-07-21 05:07:47,539 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 81 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:07:47,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 167 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:07:47,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-21 05:07:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2022-07-21 05:07:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 19 states have call successors, (19), 10 states have call predecessors, (19), 12 states have return successors, (52), 20 states have call predecessors, (52), 19 states have call successors, (52) [2022-07-21 05:07:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 151 transitions. [2022-07-21 05:07:47,548 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 151 transitions. Word has length 79 [2022-07-21 05:07:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:07:47,548 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 151 transitions. [2022-07-21 05:07:47,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-21 05:07:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 151 transitions. [2022-07-21 05:07:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-21 05:07:47,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:07:47,550 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:07:47,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 05:07:47,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:47,763 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:07:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:07:47,764 INFO L85 PathProgramCache]: Analyzing trace with hash 502211684, now seen corresponding path program 2 times [2022-07-21 05:07:47,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:07:47,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581819259] [2022-07-21 05:07:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:47,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:07:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:47,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:07:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:47,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:47,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:47,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:47,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:47,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:47,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:07:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:47,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 05:07:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:47,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:47,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:47,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:47,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:07:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:47,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-21 05:07:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:47,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:48,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:48,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:48,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 05:07:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:48,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:48,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:48,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:48,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:07:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 140 proven. 160 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-21 05:07:48,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:07:48,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581819259] [2022-07-21 05:07:48,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581819259] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:07:48,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391765751] [2022-07-21 05:07:48,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:07:48,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:48,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:07:48,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:07:48,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 05:07:48,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:07:48,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:07:48,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 05:07:48,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:07:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 82 proven. 133 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2022-07-21 05:07:48,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:07:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 82 proven. 141 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-07-21 05:07:48,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391765751] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:07:48,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:07:48,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 13] total 32 [2022-07-21 05:07:48,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916013906] [2022-07-21 05:07:48,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:07:48,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 05:07:48,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:07:48,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 05:07:48,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-07-21 05:07:48,877 INFO L87 Difference]: Start difference. First operand 98 states and 151 transitions. Second operand has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 32 states have internal predecessors, (89), 20 states have call successors, (26), 1 states have call predecessors, (26), 14 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2022-07-21 05:07:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:07:49,397 INFO L93 Difference]: Finished difference Result 230 states and 432 transitions. [2022-07-21 05:07:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 05:07:49,397 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 32 states have internal predecessors, (89), 20 states have call successors, (26), 1 states have call predecessors, (26), 14 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) Word has length 148 [2022-07-21 05:07:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:07:49,399 INFO L225 Difference]: With dead ends: 230 [2022-07-21 05:07:49,399 INFO L226 Difference]: Without dead ends: 114 [2022-07-21 05:07:49,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 325 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=357, Invalid=1899, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 05:07:49,401 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 206 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:07:49,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 264 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:07:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-21 05:07:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2022-07-21 05:07:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 67 states have internal predecessors, (82), 17 states have call successors, (17), 11 states have call predecessors, (17), 12 states have return successors, (36), 17 states have call predecessors, (36), 17 states have call successors, (36) [2022-07-21 05:07:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2022-07-21 05:07:49,407 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 148 [2022-07-21 05:07:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:07:49,408 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2022-07-21 05:07:49,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 32 states have internal predecessors, (89), 20 states have call successors, (26), 1 states have call predecessors, (26), 14 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2022-07-21 05:07:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2022-07-21 05:07:49,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-21 05:07:49,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:07:49,409 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:07:49,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 05:07:49,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:49,627 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:07:49,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:07:49,627 INFO L85 PathProgramCache]: Analyzing trace with hash 882144864, now seen corresponding path program 1 times [2022-07-21 05:07:49,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:07:49,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289431209] [2022-07-21 05:07:49,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:49,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:07:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:07:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:07:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 05:07:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:07:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 79 proven. 22 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-07-21 05:07:49,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:07:49,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289431209] [2022-07-21 05:07:49,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289431209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:07:49,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813933079] [2022-07-21 05:07:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:49,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:49,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:07:49,784 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:07:49,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 05:07:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:49,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 05:07:49,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:07:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-21 05:07:49,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:07:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-21 05:07:50,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813933079] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:07:50,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:07:50,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 9] total 19 [2022-07-21 05:07:50,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981520136] [2022-07-21 05:07:50,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:07:50,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 05:07:50,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:07:50,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 05:07:50,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-07-21 05:07:50,127 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) [2022-07-21 05:07:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:07:50,304 INFO L93 Difference]: Finished difference Result 196 states and 283 transitions. [2022-07-21 05:07:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 05:07:50,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) Word has length 92 [2022-07-21 05:07:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:07:50,306 INFO L225 Difference]: With dead ends: 196 [2022-07-21 05:07:50,306 INFO L226 Difference]: Without dead ends: 109 [2022-07-21 05:07:50,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-07-21 05:07:50,307 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 56 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:07:50,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 196 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:07:50,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-21 05:07:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-07-21 05:07:50,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 71 states have internal predecessors, (88), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2022-07-21 05:07:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2022-07-21 05:07:50,312 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 92 [2022-07-21 05:07:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:07:50,313 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2022-07-21 05:07:50,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) [2022-07-21 05:07:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2022-07-21 05:07:50,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-21 05:07:50,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:07:50,314 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:07:50,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 05:07:50,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 05:07:50,515 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:07:50,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:07:50,515 INFO L85 PathProgramCache]: Analyzing trace with hash -574358487, now seen corresponding path program 2 times [2022-07-21 05:07:50,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:07:50,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639424876] [2022-07-21 05:07:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:50,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:07:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:07:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:07:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-21 05:07:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-21 05:07:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:07:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-21 05:07:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:07:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:07:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 58 proven. 98 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-21 05:07:50,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:07:50,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639424876] [2022-07-21 05:07:50,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639424876] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:07:50,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629714267] [2022-07-21 05:07:50,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:07:50,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:50,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:07:50,683 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:07:50,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 05:07:50,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:07:50,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:07:50,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 05:07:50,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:07:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 55 proven. 61 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-07-21 05:07:50,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:07:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 57 proven. 63 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-07-21 05:07:51,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629714267] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:07:51,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:07:51,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 11] total 24 [2022-07-21 05:07:51,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723028855] [2022-07-21 05:07:51,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:07:51,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 05:07:51,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:07:51,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 05:07:51,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-07-21 05:07:51,189 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 15 states have call predecessors, (27), 15 states have call successors, (27) [2022-07-21 05:07:51,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:07:51,401 INFO L93 Difference]: Finished difference Result 206 states and 292 transitions. [2022-07-21 05:07:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 05:07:51,401 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 15 states have call predecessors, (27), 15 states have call successors, (27) Word has length 107 [2022-07-21 05:07:51,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:07:51,402 INFO L225 Difference]: With dead ends: 206 [2022-07-21 05:07:51,402 INFO L226 Difference]: Without dead ends: 113 [2022-07-21 05:07:51,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-07-21 05:07:51,403 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:07:51,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 163 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:07:51,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-21 05:07:51,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2022-07-21 05:07:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 69 states have internal predecessors, (86), 18 states have call successors, (18), 13 states have call predecessors, (18), 11 states have return successors, (31), 17 states have call predecessors, (31), 18 states have call successors, (31) [2022-07-21 05:07:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 135 transitions. [2022-07-21 05:07:51,409 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 135 transitions. Word has length 107 [2022-07-21 05:07:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:07:51,410 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 135 transitions. [2022-07-21 05:07:51,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 15 states have call predecessors, (27), 15 states have call successors, (27) [2022-07-21 05:07:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 135 transitions. [2022-07-21 05:07:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-21 05:07:51,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:07:51,412 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:07:51,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 05:07:51,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:07:51,629 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:07:51,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:07:51,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2118534433, now seen corresponding path program 3 times [2022-07-21 05:07:51,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:07:51,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665788430] [2022-07-21 05:07:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:07:51,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:07:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 05:07:51,638 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 05:07:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 05:07:51,659 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 05:07:51,659 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 05:07:51,660 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 05:07:51,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 05:07:51,663 INFO L356 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:07:51,665 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 05:07:51,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 05:07:51 BoogieIcfgContainer [2022-07-21 05:07:51,692 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 05:07:51,693 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 05:07:51,693 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 05:07:51,693 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 05:07:51,694 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:07:41" (3/4) ... [2022-07-21 05:07:51,695 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-21 05:07:51,726 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 05:07:51,726 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 05:07:51,726 INFO L158 Benchmark]: Toolchain (without parser) took 10281.56ms. Allocated memory was 48.2MB in the beginning and 130.0MB in the end (delta: 81.8MB). Free memory was 25.6MB in the beginning and 71.8MB in the end (delta: -46.2MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. [2022-07-21 05:07:51,726 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 48.2MB. Free memory was 30.5MB in the beginning and 30.4MB in the end (delta: 38.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 05:07:51,727 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.23ms. Allocated memory was 48.2MB in the beginning and 60.8MB in the end (delta: 12.6MB). Free memory was 25.3MB in the beginning and 45.1MB in the end (delta: -19.9MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2022-07-21 05:07:51,727 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.27ms. Allocated memory is still 60.8MB. Free memory was 45.1MB in the beginning and 43.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 05:07:51,727 INFO L158 Benchmark]: Boogie Preprocessor took 25.96ms. Allocated memory is still 60.8MB. Free memory was 43.6MB in the beginning and 42.7MB in the end (delta: 887.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 05:07:51,727 INFO L158 Benchmark]: RCFGBuilder took 218.23ms. Allocated memory is still 60.8MB. Free memory was 42.7MB in the beginning and 33.6MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-21 05:07:51,728 INFO L158 Benchmark]: TraceAbstraction took 9775.37ms. Allocated memory was 60.8MB in the beginning and 130.0MB in the end (delta: 69.2MB). Free memory was 33.2MB in the beginning and 74.9MB in the end (delta: -41.8MB). Peak memory consumption was 29.2MB. Max. memory is 16.1GB. [2022-07-21 05:07:51,728 INFO L158 Benchmark]: Witness Printer took 32.98ms. Allocated memory is still 130.0MB. Free memory was 74.9MB in the beginning and 71.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-21 05:07:51,729 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 48.2MB. Free memory was 30.5MB in the beginning and 30.4MB in the end (delta: 38.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 192.23ms. Allocated memory was 48.2MB in the beginning and 60.8MB in the end (delta: 12.6MB). Free memory was 25.3MB in the beginning and 45.1MB in the end (delta: -19.9MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.27ms. Allocated memory is still 60.8MB. Free memory was 45.1MB in the beginning and 43.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.96ms. Allocated memory is still 60.8MB. Free memory was 43.6MB in the beginning and 42.7MB in the end (delta: 887.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 218.23ms. Allocated memory is still 60.8MB. Free memory was 42.7MB in the beginning and 33.6MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 9775.37ms. Allocated memory was 60.8MB in the beginning and 130.0MB in the end (delta: 69.2MB). Free memory was 33.2MB in the beginning and 74.9MB in the end (delta: -41.8MB). Peak memory consumption was 29.2MB. Max. memory is 16.1GB. * Witness Printer took 32.98ms. Allocated memory is still 130.0MB. Free memory was 74.9MB in the beginning and 71.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 5; VAL [x=5] [L39] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) VAL [fibo1(x)=5, x=5] [L39] int result = fibo1(x); [L40] COND TRUE result == 5 VAL [result=5, x=5] [L41] reach_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.7s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 767 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 698 mSDsluCounter, 1714 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1410 mSDsCounter, 755 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3283 IncrementalHoareTripleChecker+Invalid, 4038 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 755 mSolverCounterUnsat, 304 mSDtfsCounter, 3283 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1543 GetRequests, 1300 SyntacticMatches, 17 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=7, InterpolantAutomatonStates: 169, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 125 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 1321 NumberOfCodeBlocks, 1321 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1783 ConstructedInterpolants, 0 QuantifiedInterpolants, 3528 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1539 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 2771/3702 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-21 05:07:51,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE