./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_init4_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/array-examples/standard_init4_ground-1.i -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 84dd450b83ffc0eda27ceeda48a4324978aec0ffc3f50cf64d7cfe4a88062bda --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 21:53:15,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 21:53:15,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 21:53:15,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 21:53:15,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 21:53:15,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 21:53:15,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 21:53:15,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 21:53:15,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 21:53:15,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 21:53:15,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 21:53:15,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 21:53:15,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 21:53:15,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 21:53:15,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 21:53:15,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 21:53:15,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 21:53:15,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 21:53:15,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 21:53:15,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 21:53:15,722 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 21:53:15,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 21:53:15,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 21:53:15,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 21:53:15,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 21:53:15,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 21:53:15,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 21:53:15,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 21:53:15,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 21:53:15,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 21:53:15,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 21:53:15,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 21:53:15,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 21:53:15,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 21:53:15,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 21:53:15,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 21:53:15,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 21:53:15,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 21:53:15,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 21:53:15,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 21:53:15,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 21:53:15,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 21:53:15,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 21:53:15,754 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 21:53:15,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 21:53:15,755 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 21:53:15,755 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 21:53:15,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 21:53:15,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 21:53:15,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 21:53:15,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 21:53:15,757 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 21:53:15,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 21:53:15,758 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 21:53:15,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 21:53:15,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 21:53:15,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 21:53:15,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 21:53:15,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 21:53:15,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 21:53:15,762 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 21:53:15,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 21:53:15,762 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 21:53:15,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 21:53:15,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 21:53:15,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 21:53:15,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 21:53:15,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 21:53:15,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 21:53:15,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 21:53:15,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 21:53:15,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 21:53:15,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 21:53:15,766 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 21:53:15,766 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 21:53:15,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 21:53:15,766 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 84dd450b83ffc0eda27ceeda48a4324978aec0ffc3f50cf64d7cfe4a88062bda [2022-07-11 21:53:16,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 21:53:16,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 21:53:16,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 21:53:16,063 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 21:53:16,063 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 21:53:16,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init4_ground-1.i [2022-07-11 21:53:16,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c58ddfe29/d08f8cdb9e1741b1b4f334ad54b07bf1/FLAGf3b82e286 [2022-07-11 21:53:16,567 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 21:53:16,568 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init4_ground-1.i [2022-07-11 21:53:16,577 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c58ddfe29/d08f8cdb9e1741b1b4f334ad54b07bf1/FLAGf3b82e286 [2022-07-11 21:53:16,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c58ddfe29/d08f8cdb9e1741b1b4f334ad54b07bf1 [2022-07-11 21:53:16,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 21:53:16,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 21:53:16,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 21:53:16,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 21:53:16,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 21:53:16,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 09:53:16" (1/1) ... [2022-07-11 21:53:16,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38587d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:53:16, skipping insertion in model container [2022-07-11 21:53:16,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 09:53:16" (1/1) ... [2022-07-11 21:53:16,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 21:53:16,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 21:53:16,720 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/array-examples/standard_init4_ground-1.i[816,829] [2022-07-11 21:53:16,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 21:53:16,739 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 21:53:16,750 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/array-examples/standard_init4_ground-1.i[816,829] [2022-07-11 21:53:16,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 21:53:16,767 INFO L208 MainTranslator]: Completed translation [2022-07-11 21:53:16,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:53:16 WrapperNode [2022-07-11 21:53:16,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 21:53:16,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 21:53:16,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 21:53:16,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 21:53:16,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:53:16" (1/1) ... [2022-07-11 21:53:16,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:53:16" (1/1) ... [2022-07-11 21:53:16,804 INFO L137 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2022-07-11 21:53:16,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 21:53:16,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 21:53:16,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 21:53:16,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 21:53:16,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:53:16" (1/1) ... [2022-07-11 21:53:16,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:53:16" (1/1) ... [2022-07-11 21:53:16,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:53:16" (1/1) ... [2022-07-11 21:53:16,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:53:16" (1/1) ... [2022-07-11 21:53:16,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:53:16" (1/1) ... [2022-07-11 21:53:16,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:53:16" (1/1) ... [2022-07-11 21:53:16,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:53:16" (1/1) ... [2022-07-11 21:53:16,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 21:53:16,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 21:53:16,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 21:53:16,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 21:53:16,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:53:16" (1/1) ... [2022-07-11 21:53:16,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 21:53:16,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:53:16,860 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) [2022-07-11 21:53:16,862 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 [2022-07-11 21:53:16,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 21:53:16,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 21:53:16,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 21:53:16,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 21:53:16,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 21:53:16,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 21:53:16,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 21:53:16,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 21:53:16,940 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 21:53:16,941 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 21:53:17,057 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 21:53:17,063 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 21:53:17,063 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-11 21:53:17,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 09:53:17 BoogieIcfgContainer [2022-07-11 21:53:17,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 21:53:17,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 21:53:17,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 21:53:17,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 21:53:17,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 09:53:16" (1/3) ... [2022-07-11 21:53:17,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3942c601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 09:53:17, skipping insertion in model container [2022-07-11 21:53:17,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:53:16" (2/3) ... [2022-07-11 21:53:17,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3942c601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 09:53:17, skipping insertion in model container [2022-07-11 21:53:17,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 09:53:17" (3/3) ... [2022-07-11 21:53:17,073 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-1.i [2022-07-11 21:53:17,085 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 21:53:17,085 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 21:53:17,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 21:53:17,144 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@e8c3cfc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@89cde7c [2022-07-11 21:53:17,144 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 21:53:17,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:17,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-11 21:53:17,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:53:17,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:53:17,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:53:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:53:17,174 INFO L85 PathProgramCache]: Analyzing trace with hash 474620133, now seen corresponding path program 1 times [2022-07-11 21:53:17,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:53:17,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623971624] [2022-07-11 21:53:17,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:53:17,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:53:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:53:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 21:53:17,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:53:17,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623971624] [2022-07-11 21:53:17,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623971624] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 21:53:17,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 21:53:17,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 21:53:17,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818569617] [2022-07-11 21:53:17,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 21:53:17,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 21:53:17,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:53:17,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 21:53:17,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 21:53:17,417 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:53:17,458 INFO L93 Difference]: Finished difference Result 41 states and 67 transitions. [2022-07-11 21:53:17,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 21:53:17,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-11 21:53:17,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:53:17,467 INFO L225 Difference]: With dead ends: 41 [2022-07-11 21:53:17,467 INFO L226 Difference]: Without dead ends: 20 [2022-07-11 21:53:17,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 21:53:17,473 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:53:17,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:53:17,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-11 21:53:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-11 21:53:17,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-07-11 21:53:17,503 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2022-07-11 21:53:17,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:53:17,503 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-07-11 21:53:17,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-07-11 21:53:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-11 21:53:17,504 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:53:17,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:53:17,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 21:53:17,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:53:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:53:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash -40844573, now seen corresponding path program 1 times [2022-07-11 21:53:17,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:53:17,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334496034] [2022-07-11 21:53:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:53:17,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:53:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:53:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 21:53:17,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:53:17,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334496034] [2022-07-11 21:53:17,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334496034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:53:17,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938784461] [2022-07-11 21:53:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:53:17,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:53:17,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:53:17,559 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) [2022-07-11 21:53:17,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 21:53:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:53:17,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 21:53:17,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:53:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 21:53:17,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:53:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 21:53:17,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938784461] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:53:17,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:53:17,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-11 21:53:17,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323798900] [2022-07-11 21:53:17,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:53:17,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 21:53:17,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:53:17,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 21:53:17,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 21:53:17,763 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:17,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:53:17,860 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2022-07-11 21:53:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 21:53:17,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-11 21:53:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:53:17,861 INFO L225 Difference]: With dead ends: 48 [2022-07-11 21:53:17,861 INFO L226 Difference]: Without dead ends: 32 [2022-07-11 21:53:17,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 21:53:17,863 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 21:53:17,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 21:53:17,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-11 21:53:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-11 21:53:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-11 21:53:17,870 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 17 [2022-07-11 21:53:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:53:17,870 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-11 21:53:17,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:17,871 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-11 21:53:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-11 21:53:17,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:53:17,872 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:53:17,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 21:53:18,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:53:18,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:53:18,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:53:18,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1096399461, now seen corresponding path program 2 times [2022-07-11 21:53:18,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:53:18,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289565444] [2022-07-11 21:53:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:53:18,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:53:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:53:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 21:53:18,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:53:18,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289565444] [2022-07-11 21:53:18,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289565444] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:53:18,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926160920] [2022-07-11 21:53:18,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 21:53:18,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:53:18,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:53:18,268 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) [2022-07-11 21:53:18,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 21:53:18,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 21:53:18,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:53:18,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 21:53:18,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:53:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 21:53:18,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:53:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 21:53:18,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926160920] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:53:18,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:53:18,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-11 21:53:18,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134694889] [2022-07-11 21:53:18,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:53:18,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 21:53:18,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:53:18,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 21:53:18,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-11 21:53:18,460 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:18,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:53:18,560 INFO L93 Difference]: Finished difference Result 81 states and 112 transitions. [2022-07-11 21:53:18,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 21:53:18,561 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-11 21:53:18,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:53:18,562 INFO L225 Difference]: With dead ends: 81 [2022-07-11 21:53:18,562 INFO L226 Difference]: Without dead ends: 56 [2022-07-11 21:53:18,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-11 21:53:18,564 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 21:53:18,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 21:53:18,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-11 21:53:18,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-11 21:53:18,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:18,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-07-11 21:53:18,573 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 29 [2022-07-11 21:53:18,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:53:18,573 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-07-11 21:53:18,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:18,573 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-07-11 21:53:18,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-11 21:53:18,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:53:18,575 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:53:18,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 21:53:18,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-11 21:53:18,799 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:53:18,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:53:18,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1399826597, now seen corresponding path program 3 times [2022-07-11 21:53:18,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:53:18,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335525562] [2022-07-11 21:53:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:53:18,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:53:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:53:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-07-11 21:53:19,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:53:19,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335525562] [2022-07-11 21:53:19,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335525562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:53:19,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237029347] [2022-07-11 21:53:19,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 21:53:19,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:53:19,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:53:19,013 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) [2022-07-11 21:53:19,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 21:53:20,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-11 21:53:20,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:53:20,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-11 21:53:20,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:53:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-07-11 21:53:20,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:53:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-11 21:53:20,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237029347] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:53:20,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:53:20,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-11 21:53:20,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869465151] [2022-07-11 21:53:20,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:53:20,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 21:53:20,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:53:20,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 21:53:20,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-11 21:53:20,557 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:20,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:53:20,756 INFO L93 Difference]: Finished difference Result 147 states and 202 transitions. [2022-07-11 21:53:20,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 21:53:20,757 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-11 21:53:20,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:53:20,758 INFO L225 Difference]: With dead ends: 147 [2022-07-11 21:53:20,758 INFO L226 Difference]: Without dead ends: 104 [2022-07-11 21:53:20,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-11 21:53:20,760 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 21:53:20,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 21:53:20,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-11 21:53:20,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-07-11 21:53:20,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:20,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-07-11 21:53:20,772 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 53 [2022-07-11 21:53:20,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:53:20,772 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-07-11 21:53:20,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:20,772 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-07-11 21:53:20,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-11 21:53:20,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:53:20,775 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:53:20,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 21:53:21,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:53:21,003 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:53:21,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:53:21,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1280824613, now seen corresponding path program 4 times [2022-07-11 21:53:21,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:53:21,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971441836] [2022-07-11 21:53:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:53:21,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:53:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:53:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-07-11 21:53:21,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:53:21,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971441836] [2022-07-11 21:53:21,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971441836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:53:21,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294613870] [2022-07-11 21:53:21,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 21:53:21,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:53:21,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:53:21,476 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) [2022-07-11 21:53:21,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 21:53:21,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 21:53:21,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:53:21,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-11 21:53:21,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:53:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-07-11 21:53:21,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:53:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-07-11 21:53:22,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294613870] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:53:22,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:53:22,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-11 21:53:22,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705477342] [2022-07-11 21:53:22,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:53:22,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-11 21:53:22,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:53:22,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-11 21:53:22,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-11 21:53:22,405 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 49 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:53:22,981 INFO L93 Difference]: Finished difference Result 279 states and 382 transitions. [2022-07-11 21:53:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-11 21:53:22,982 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 49 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-11 21:53:22,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:53:22,983 INFO L225 Difference]: With dead ends: 279 [2022-07-11 21:53:22,984 INFO L226 Difference]: Without dead ends: 200 [2022-07-11 21:53:22,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-11 21:53:22,986 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 21:53:22,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 21:53:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-11 21:53:23,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-07-11 21:53:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0251256281407035) internal successors, (204), 199 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2022-07-11 21:53:23,007 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 101 [2022-07-11 21:53:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:53:23,008 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2022-07-11 21:53:23,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 49 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 21:53:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2022-07-11 21:53:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-11 21:53:23,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:53:23,017 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:53:23,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 21:53:23,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:53:23,243 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:53:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:53:23,244 INFO L85 PathProgramCache]: Analyzing trace with hash -545690075, now seen corresponding path program 5 times [2022-07-11 21:53:23,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:53:23,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112116284] [2022-07-11 21:53:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:53:23,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:53:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:53:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-07-11 21:53:24,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:53:24,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112116284] [2022-07-11 21:53:24,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112116284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:53:24,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080827712] [2022-07-11 21:53:24,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 21:53:24,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:53:24,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:53:24,408 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) [2022-07-11 21:53:24,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process