./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-new/gauss_sum.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-new/gauss_sum.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 ac0c39e955880a6b0806ad5f8add28438e78eb47defb435342badf7c95feaa91 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 06:34:02,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 06:34:02,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 06:34:02,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 06:34:02,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 06:34:02,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 06:34:02,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 06:34:02,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 06:34:02,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 06:34:02,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 06:34:02,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 06:34:02,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 06:34:02,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 06:34:02,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 06:34:02,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 06:34:02,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 06:34:02,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 06:34:02,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 06:34:02,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 06:34:02,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 06:34:02,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 06:34:02,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 06:34:02,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 06:34:02,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 06:34:02,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 06:34:02,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 06:34:02,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 06:34:02,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 06:34:02,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 06:34:02,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 06:34:02,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 06:34:02,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 06:34:02,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 06:34:02,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 06:34:02,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 06:34:02,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 06:34:02,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 06:34:02,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 06:34:02,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 06:34:02,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 06:34:02,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 06:34:02,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 06:34:02,909 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 06:34:02,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 06:34:02,910 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 06:34:02,910 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 06:34:02,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 06:34:02,911 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 06:34:02,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 06:34:02,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 06:34:02,912 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 06:34:02,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 06:34:02,913 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 06:34:02,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 06:34:02,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 06:34:02,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 06:34:02,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 06:34:02,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 06:34:02,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 06:34:02,914 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 06:34:02,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 06:34:02,914 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 06:34:02,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 06:34:02,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 06:34:02,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 06:34:02,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 06:34:02,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 06:34:02,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 06:34:02,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 06:34:02,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 06:34:02,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 06:34:02,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 06:34:02,917 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 06:34:02,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 06:34:02,917 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 06:34:02,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 06:34:02,918 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 06:34:02,918 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac0c39e955880a6b0806ad5f8add28438e78eb47defb435342badf7c95feaa91 [2023-02-17 06:34:03,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 06:34:03,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 06:34:03,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 06:34:03,186 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 06:34:03,188 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 06:34:03,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/gauss_sum.i [2023-02-17 06:34:04,363 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 06:34:04,550 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 06:34:04,550 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/gauss_sum.i [2023-02-17 06:34:04,554 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b127b56ed/9b1443573aaa46b7a584bfd28a13ee8e/FLAGe1ac3719c [2023-02-17 06:34:04,572 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b127b56ed/9b1443573aaa46b7a584bfd28a13ee8e [2023-02-17 06:34:04,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 06:34:04,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 06:34:04,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 06:34:04,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 06:34:04,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 06:34:04,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:34:04" (1/1) ... [2023-02-17 06:34:04,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c9d17b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:34:04, skipping insertion in model container [2023-02-17 06:34:04,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:34:04" (1/1) ... [2023-02-17 06:34:04,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 06:34:04,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 06:34:04,724 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/gauss_sum.i[891,904] [2023-02-17 06:34:04,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 06:34:04,739 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 06:34:04,750 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/gauss_sum.i[891,904] [2023-02-17 06:34:04,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 06:34:04,764 INFO L208 MainTranslator]: Completed translation [2023-02-17 06:34:04,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:34:04 WrapperNode [2023-02-17 06:34:04,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 06:34:04,766 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 06:34:04,766 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 06:34:04,766 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 06:34:04,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:34:04" (1/1) ... [2023-02-17 06:34:04,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:34:04" (1/1) ... [2023-02-17 06:34:04,791 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 37 [2023-02-17 06:34:04,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 06:34:04,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 06:34:04,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 06:34:04,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 06:34:04,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:34:04" (1/1) ... [2023-02-17 06:34:04,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:34:04" (1/1) ... [2023-02-17 06:34:04,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:34:04" (1/1) ... [2023-02-17 06:34:04,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:34:04" (1/1) ... [2023-02-17 06:34:04,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:34:04" (1/1) ... [2023-02-17 06:34:04,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:34:04" (1/1) ... [2023-02-17 06:34:04,804 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:34:04" (1/1) ... [2023-02-17 06:34:04,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:34:04" (1/1) ... [2023-02-17 06:34:04,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 06:34:04,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 06:34:04,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 06:34:04,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 06:34:04,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:34:04" (1/1) ... [2023-02-17 06:34:04,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 06:34:04,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:34:04,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 06:34:04,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 06:34:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 06:34:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 06:34:04,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 06:34:04,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 06:34:04,932 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 06:34:04,934 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 06:34:05,081 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 06:34:05,086 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 06:34:05,086 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-17 06:34:05,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:34:05 BoogieIcfgContainer [2023-02-17 06:34:05,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 06:34:05,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 06:34:05,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 06:34:05,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 06:34:05,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 06:34:04" (1/3) ... [2023-02-17 06:34:05,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55391504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:34:05, skipping insertion in model container [2023-02-17 06:34:05,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:34:04" (2/3) ... [2023-02-17 06:34:05,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55391504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:34:05, skipping insertion in model container [2023-02-17 06:34:05,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:34:05" (3/3) ... [2023-02-17 06:34:05,103 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2023-02-17 06:34:05,120 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 06:34:05,120 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 06:34:05,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 06:34:05,192 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c99f304, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 06:34:05,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 06:34:05,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:34:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 06:34:05,203 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:34:05,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:34:05,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:34:05,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:34:05,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1807120264, now seen corresponding path program 1 times [2023-02-17 06:34:05,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:34:05,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050883688] [2023-02-17 06:34:05,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:34:05,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:34:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:34:05,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:34:05,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050883688] [2023-02-17 06:34:05,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 06:34:05,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643932062] [2023-02-17 06:34:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:34:05,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:34:05,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:34:05,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 06:34:05,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 06:34:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:34:05,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 06:34:05,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:34:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:34:05,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 06:34:05,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643932062] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 06:34:05,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 06:34:05,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 06:34:05,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144930574] [2023-02-17 06:34:05,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 06:34:05,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 06:34:05,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:34:05,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 06:34:05,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 06:34:05,478 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:34:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:34:05,491 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-02-17 06:34:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 06:34:05,493 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2023-02-17 06:34:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:34:05,499 INFO L225 Difference]: With dead ends: 21 [2023-02-17 06:34:05,499 INFO L226 Difference]: Without dead ends: 9 [2023-02-17 06:34:05,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 06:34:05,504 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 06:34:05,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 06:34:05,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-02-17 06:34:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-02-17 06:34:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:34:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2023-02-17 06:34:05,564 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2023-02-17 06:34:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:34:05,565 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2023-02-17 06:34:05,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:34:05,566 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2023-02-17 06:34:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 06:34:05,568 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:34:05,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:34:05,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 06:34:05,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-17 06:34:05,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:34:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:34:05,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1806941518, now seen corresponding path program 1 times [2023-02-17 06:34:05,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:34:05,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157323957] [2023-02-17 06:34:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:34:05,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:34:05,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:34:05,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833937383] [2023-02-17 06:34:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:34:05,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:34:05,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:34:05,792 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 06:34:05,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 06:34:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:34:05,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 06:34:05,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:34:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:34:05,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 06:34:05,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:34:05,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157323957] [2023-02-17 06:34:05,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:34:05,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833937383] [2023-02-17 06:34:05,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833937383] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 06:34:05,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 06:34:05,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 06:34:05,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361505570] [2023-02-17 06:34:05,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 06:34:05,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 06:34:05,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:34:05,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 06:34:05,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 06:34:05,865 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:34:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:34:05,893 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2023-02-17 06:34:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 06:34:05,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2023-02-17 06:34:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:34:05,895 INFO L225 Difference]: With dead ends: 15 [2023-02-17 06:34:05,895 INFO L226 Difference]: Without dead ends: 11 [2023-02-17 06:34:05,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 06:34:05,897 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 06:34:05,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 06:34:05,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-17 06:34:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2023-02-17 06:34:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:34:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-02-17 06:34:05,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2023-02-17 06:34:05,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:34:05,904 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-02-17 06:34:05,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:34:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-02-17 06:34:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 06:34:05,905 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:34:05,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:34:05,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 06:34:06,111 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,SelfDestructingSolverStorable1 [2023-02-17 06:34:06,112 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:34:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:34:06,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1357243696, now seen corresponding path program 1 times [2023-02-17 06:34:06,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:34:06,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711908199] [2023-02-17 06:34:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:34:06,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:34:06,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:34:06,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696207227] [2023-02-17 06:34:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:34:06,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:34:06,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:34:06,134 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 06:34:06,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 06:34:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 06:34:06,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 06:34:06,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:34:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:34:06,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:34:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:34:06,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:34:06,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711908199] [2023-02-17 06:34:06,371 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:34:06,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696207227] [2023-02-17 06:34:06,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696207227] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:34:06,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:34:06,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-17 06:34:06,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137926137] [2023-02-17 06:34:06,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 06:34:06,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 06:34:06,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:34:06,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 06:34:06,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-17 06:34:06,377 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:34:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:34:06,451 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2023-02-17 06:34:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 06:34:06,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 9 [2023-02-17 06:34:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:34:06,452 INFO L225 Difference]: With dead ends: 16 [2023-02-17 06:34:06,452 INFO L226 Difference]: Without dead ends: 12 [2023-02-17 06:34:06,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-02-17 06:34:06,457 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 06:34:06,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 25 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 06:34:06,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-17 06:34:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-17 06:34:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:34:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-02-17 06:34:06,467 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2023-02-17 06:34:06,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:34:06,468 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-02-17 06:34:06,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:34:06,468 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-02-17 06:34:06,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 06:34:06,469 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 06:34:06,469 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 06:34:06,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 06:34:06,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:34:06,670 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 06:34:06,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 06:34:06,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1305633646, now seen corresponding path program 2 times [2023-02-17 06:34:06,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 06:34:06,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434415162] [2023-02-17 06:34:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 06:34:06,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 06:34:06,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 06:34:06,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771861371] [2023-02-17 06:34:06,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 06:34:06,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:34:06,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 06:34:06,685 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 06:34:06,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 06:34:06,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 06:34:06,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 06:34:06,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 06:34:06,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 06:34:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 06:34:06,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 06:34:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 06:34:07,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 06:34:07,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434415162] [2023-02-17 06:34:07,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 06:34:07,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771861371] [2023-02-17 06:34:07,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771861371] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 06:34:07,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 06:34:07,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-02-17 06:34:07,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223386565] [2023-02-17 06:34:07,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 06:34:07,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 06:34:07,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 06:34:07,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 06:34:07,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-02-17 06:34:07,102 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:34:07,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 06:34:07,427 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2023-02-17 06:34:07,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 06:34:07,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 11 [2023-02-17 06:34:07,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 06:34:07,427 INFO L225 Difference]: With dead ends: 16 [2023-02-17 06:34:07,428 INFO L226 Difference]: Without dead ends: 0 [2023-02-17 06:34:07,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2023-02-17 06:34:07,429 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 06:34:07,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 13 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 06:34:07,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-17 06:34:07,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-17 06:34:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:34:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-17 06:34:07,430 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2023-02-17 06:34:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 06:34:07,430 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-17 06:34:07,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 06:34:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-17 06:34:07,431 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-17 06:34:07,433 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-17 06:34:07,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 06:34:07,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 06:34:07,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-17 06:34:07,646 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-17 06:34:07,647 INFO L899 garLoopResultBuilder]: For program point L27(line 27) no Hoare annotation was computed. [2023-02-17 06:34:07,647 INFO L899 garLoopResultBuilder]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2023-02-17 06:34:07,647 INFO L895 garLoopResultBuilder]: At program point L29-3(lines 29 31) the Hoare annotation is: (let ((.cse3 (forall ((|ULTIMATE.start_main_~n~0#1| Int)) (or (< (+ |ULTIMATE.start_main_~i~0#1| 1) (+ |ULTIMATE.start_main_~n~0#1| 1)) (= (* 2 (+ |ULTIMATE.start_main_~sum~0#1| |ULTIMATE.start_main_~i~0#1|)) (* |ULTIMATE.start_main_~n~0#1| (+ 1 |ULTIMATE.start_main_~n~0#1|))) (not (<= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|))))) (.cse2 (+ |ULTIMATE.start_main_~i~0#1| (- 1))) (.cse0 (or (<= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~n~0#1|) (= (* 2 |ULTIMATE.start_main_~sum~0#1|) (* |ULTIMATE.start_main_~n~0#1| (+ 1 |ULTIMATE.start_main_~n~0#1|))))) (.cse1 (<= 1 |ULTIMATE.start_main_~n~0#1|))) (or (and (<= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start_main_~sum~0#1| 0) .cse0 .cse1 (= |ULTIMATE.start_main_~i~0#1| 1)) (and (<= .cse2 2) .cse3 (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~sum~0#1| (+ (+ 0 (+ 2 (- 1))) 2))) (and .cse3 .cse0) (and (= |ULTIMATE.start_main_~sum~0#1| (+ 0 .cse2)) (<= .cse2 1) (= .cse2 1) (= |ULTIMATE.start_main_~sum~0#1| (+ 0 1)) .cse0 .cse1))) [2023-02-17 06:34:07,648 INFO L899 garLoopResultBuilder]: For program point L29-4(lines 29 31) no Hoare annotation was computed. [2023-02-17 06:34:07,648 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2023-02-17 06:34:07,648 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-17 06:34:07,648 INFO L902 garLoopResultBuilder]: At program point main_returnLabel#1(lines 24 34) the Hoare annotation is: true [2023-02-17 06:34:07,648 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-17 06:34:07,648 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-17 06:34:07,648 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2023-02-17 06:34:07,648 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2023-02-17 06:34:07,648 INFO L902 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2023-02-17 06:34:07,651 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2023-02-17 06:34:07,653 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-17 06:34:07,660 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,661 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,661 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,661 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,662 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,662 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,662 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,662 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,669 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,669 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,669 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,669 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,669 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,669 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,670 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,670 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.02 06:34:07 BoogieIcfgContainer [2023-02-17 06:34:07,675 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-17 06:34:07,675 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-17 06:34:07,675 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-17 06:34:07,676 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-17 06:34:07,676 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:34:05" (3/4) ... [2023-02-17 06:34:07,679 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-17 06:34:07,692 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2023-02-17 06:34:07,693 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-02-17 06:34:07,693 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-17 06:34:07,693 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-17 06:34:07,732 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-17 06:34:07,732 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-17 06:34:07,732 INFO L158 Benchmark]: Toolchain (without parser) took 3156.11ms. Allocated memory was 130.0MB in the beginning and 165.7MB in the end (delta: 35.7MB). Free memory was 85.1MB in the beginning and 136.7MB in the end (delta: -51.6MB). Peak memory consumption was 56.2MB. Max. memory is 16.1GB. [2023-02-17 06:34:07,733 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 130.0MB. Free memory is still 99.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 06:34:07,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.82ms. Allocated memory is still 130.0MB. Free memory was 84.6MB in the beginning and 74.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-17 06:34:07,733 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.45ms. Allocated memory is still 130.0MB. Free memory was 74.6MB in the beginning and 73.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 06:34:07,733 INFO L158 Benchmark]: Boogie Preprocessor took 14.63ms. Allocated memory is still 130.0MB. Free memory was 73.1MB in the beginning and 71.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 06:34:07,733 INFO L158 Benchmark]: RCFGBuilder took 280.36ms. Allocated memory is still 130.0MB. Free memory was 71.9MB in the beginning and 61.5MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-17 06:34:07,734 INFO L158 Benchmark]: TraceAbstraction took 2585.63ms. Allocated memory was 130.0MB in the beginning and 165.7MB in the end (delta: 35.7MB). Free memory was 61.0MB in the beginning and 67.2MB in the end (delta: -6.3MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. [2023-02-17 06:34:07,734 INFO L158 Benchmark]: Witness Printer took 56.41ms. Allocated memory is still 165.7MB. Free memory was 67.2MB in the beginning and 136.7MB in the end (delta: -69.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 06:34:07,736 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 130.0MB. Free memory is still 99.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 187.82ms. Allocated memory is still 130.0MB. Free memory was 84.6MB in the beginning and 74.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.45ms. Allocated memory is still 130.0MB. Free memory was 74.6MB in the beginning and 73.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 14.63ms. Allocated memory is still 130.0MB. Free memory was 73.1MB in the beginning and 71.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 280.36ms. Allocated memory is still 130.0MB. Free memory was 71.9MB in the beginning and 61.5MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2585.63ms. Allocated memory was 130.0MB in the beginning and 165.7MB in the end (delta: 35.7MB). Free memory was 61.0MB in the beginning and 67.2MB in the end (delta: -6.3MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. * Witness Printer took 56.41ms. Allocated memory is still 165.7MB. Free memory was 67.2MB in the beginning and 136.7MB in the end (delta: -69.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.5s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13 mSDsluCounter, 62 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 33 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 119 IncrementalHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 29 mSDtfsCounter, 119 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 8 NumberOfFragments, 148 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 48 ConstructedInterpolants, 3 QuantifiedInterpolants, 352 SizeOfPredicates, 14 NumberOfNonLiveVariables, 163 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 1/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant [2023-02-17 06:34:07,753 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,753 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,753 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,753 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,754 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,754 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,754 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,754 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,755 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,755 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,755 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,755 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,755 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,755 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,756 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] [2023-02-17 06:34:07,756 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~n~0#1,QUANTIFIED] Derived loop invariant: ((((((i <= 1 && sum == 0) && (i <= n || 2 * sum == n * (1 + n))) && 1 <= n) && i == 1) || (((i + -1 <= 2 && (forall ULTIMATE.start_main_~n~0#1 : int :: (i + 1 < ULTIMATE.start_main_~n~0#1 + 1 || 2 * (sum + i) == ULTIMATE.start_main_~n~0#1 * (1 + ULTIMATE.start_main_~n~0#1)) || !(i <= ULTIMATE.start_main_~n~0#1))) && 2 <= n) && sum == 0 + (2 + -1) + 2)) || ((forall ULTIMATE.start_main_~n~0#1 : int :: (i + 1 < ULTIMATE.start_main_~n~0#1 + 1 || 2 * (sum + i) == ULTIMATE.start_main_~n~0#1 * (1 + ULTIMATE.start_main_~n~0#1)) || !(i <= ULTIMATE.start_main_~n~0#1)) && (i <= n || 2 * sum == n * (1 + n)))) || (((((sum == 0 + (i + -1) && i + -1 <= 1) && i + -1 == 1) && sum == 0 + 1) && (i <= n || 2 * sum == n * (1 + n))) && 1 <= n) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2023-02-17 06:34:07,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE