./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/inv_square-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/float-benchs/inv_square-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 052b65435ce93a43ae641d125fc7546191d1b08e ................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/float-benchs/inv_square-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 052b65435ce93a43ae641d125fc7546191d1b08e ............................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 00:41:16,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 00:41:16,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 00:41:16,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 00:41:16,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 00:41:16,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 00:41:16,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 00:41:16,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 00:41:16,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 00:41:16,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 00:41:16,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 00:41:16,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 00:41:16,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 00:41:16,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 00:41:16,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 00:41:16,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 00:41:16,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 00:41:16,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 00:41:16,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 00:41:16,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 00:41:16,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 00:41:16,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 00:41:16,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 00:41:16,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 00:41:16,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 00:41:16,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 00:41:16,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 00:41:16,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 00:41:16,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 00:41:16,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 00:41:16,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 00:41:16,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 00:41:16,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 00:41:16,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 00:41:16,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 00:41:16,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 00:41:16,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 00:41:16,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 00:41:16,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 00:41:16,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 00:41:16,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 00:41:16,936 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 00:41:16,955 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 00:41:16,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 00:41:16,955 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 00:41:16,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 00:41:16,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 00:41:16,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 00:41:16,957 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 00:41:16,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 00:41:16,957 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 00:41:16,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 00:41:16,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 00:41:16,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 00:41:16,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 00:41:16,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 00:41:16,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 00:41:16,959 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 00:41:16,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 00:41:16,959 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 00:41:16,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 00:41:16,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 00:41:16,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 00:41:16,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 00:41:16,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:41:16,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 00:41:16,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 00:41:16,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 00:41:16,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 00:41:16,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 00:41:16,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 00:41:16,961 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 00:41:16,961 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052b65435ce93a43ae641d125fc7546191d1b08e [2021-08-26 00:41:17,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 00:41:17,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 00:41:17,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 00:41:17,302 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 00:41:17,302 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 00:41:17,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square-2.c [2021-08-26 00:41:17,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b4b84925/edbd1ba09f8447b0a025a955b1c992c9/FLAG2657246a7 [2021-08-26 00:41:17,803 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 00:41:17,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-2.c [2021-08-26 00:41:17,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b4b84925/edbd1ba09f8447b0a025a955b1c992c9/FLAG2657246a7 [2021-08-26 00:41:17,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b4b84925/edbd1ba09f8447b0a025a955b1c992c9 [2021-08-26 00:41:17,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 00:41:17,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 00:41:17,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 00:41:17,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 00:41:17,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 00:41:17,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:41:17" (1/1) ... [2021-08-26 00:41:17,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7121c17e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:17, skipping insertion in model container [2021-08-26 00:41:17,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:41:17" (1/1) ... [2021-08-26 00:41:17,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 00:41:17,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 00:41:17,984 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-2.c[484,497] [2021-08-26 00:41:18,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:41:18,008 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 00:41:18,023 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-2.c[484,497] [2021-08-26 00:41:18,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:41:18,045 INFO L208 MainTranslator]: Completed translation [2021-08-26 00:41:18,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:18 WrapperNode [2021-08-26 00:41:18,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 00:41:18,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 00:41:18,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 00:41:18,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 00:41:18,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:18" (1/1) ... [2021-08-26 00:41:18,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:18" (1/1) ... [2021-08-26 00:41:18,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 00:41:18,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 00:41:18,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 00:41:18,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 00:41:18,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:18" (1/1) ... [2021-08-26 00:41:18,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:18" (1/1) ... [2021-08-26 00:41:18,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:18" (1/1) ... [2021-08-26 00:41:18,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:18" (1/1) ... [2021-08-26 00:41:18,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:18" (1/1) ... [2021-08-26 00:41:18,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:18" (1/1) ... [2021-08-26 00:41:18,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:18" (1/1) ... [2021-08-26 00:41:18,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 00:41:18,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 00:41:18,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 00:41:18,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 00:41:18,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:18" (1/1) ... [2021-08-26 00:41:18,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:41:18,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 00:41:18,142 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) [2021-08-26 00:41:18,153 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 [2021-08-26 00:41:18,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 00:41:18,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 00:41:18,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 00:41:18,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 00:41:18,428 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 00:41:18,429 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-26 00:41:18,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:41:18 BoogieIcfgContainer [2021-08-26 00:41:18,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 00:41:18,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 00:41:18,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 00:41:18,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 00:41:18,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:41:17" (1/3) ... [2021-08-26 00:41:18,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e18b666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:41:18, skipping insertion in model container [2021-08-26 00:41:18,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:18" (2/3) ... [2021-08-26 00:41:18,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e18b666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:41:18, skipping insertion in model container [2021-08-26 00:41:18,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:41:18" (3/3) ... [2021-08-26 00:41:18,443 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2021-08-26 00:41:18,447 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 00:41:18,447 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 00:41:18,496 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 00:41:18,514 INFO L339 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, mConcurrency=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 00:41:18,514 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 00:41:18,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-08-26 00:41:18,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 00:41:18,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:41:18,529 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 00:41:18,529 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:41:18,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:41:18,534 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2021-08-26 00:41:18,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 00:41:18,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283191312] [2021-08-26 00:41:18,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:41:18,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 00:41:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 00:41:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 00:41:18,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 00:41:18,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283191312] [2021-08-26 00:41:18,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283191312] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 00:41:18,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 00:41:18,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 00:41:18,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524046113] [2021-08-26 00:41:18,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 00:41:18,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 00:41:18,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 00:41:18,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 00:41:18,675 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-08-26 00:41:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 00:41:18,685 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-08-26 00:41:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 00:41:18,686 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-08-26 00:41:18,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 00:41:18,691 INFO L225 Difference]: With dead ends: 21 [2021-08-26 00:41:18,691 INFO L226 Difference]: Without dead ends: 7 [2021-08-26 00:41:18,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 00:41:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-08-26 00:41:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-08-26 00:41:18,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 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) [2021-08-26 00:41:18,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-08-26 00:41:18,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-08-26 00:41:18,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 00:41:18,714 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-08-26 00:41:18,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-08-26 00:41:18,715 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-08-26 00:41:18,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 00:41:18,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:41:18,716 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 00:41:18,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 00:41:18,716 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:41:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:41:18,717 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2021-08-26 00:41:18,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 00:41:18,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538778000] [2021-08-26 00:41:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:41:18,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 00:41:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 00:41:18,737 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 00:41:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 00:41:18,767 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 00:41:18,767 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 00:41:18,768 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 00:41:18,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 00:41:18,774 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 00:41:18,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:41:18 BoogieIcfgContainer [2021-08-26 00:41:18,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 00:41:18,789 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 00:41:18,789 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 00:41:18,789 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 00:41:18,790 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:41:18" (3/4) ... [2021-08-26 00:41:18,792 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 00:41:18,792 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 00:41:18,794 INFO L168 Benchmark]: Toolchain (without parser) took 970.78 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 32.1 MB in the beginning and 33.4 MB in the end (delta: -1.3 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:18,795 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 54.5 MB. Free memory was 37.2 MB in the beginning and 37.1 MB in the end (delta: 41.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:41:18,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.57 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.9 MB in the beginning and 51.1 MB in the end (delta: -19.2 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:18,796 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.43 ms. Allocated memory is still 67.1 MB. Free memory was 50.9 MB in the beginning and 49.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:41:18,796 INFO L168 Benchmark]: Boogie Preprocessor took 28.03 ms. Allocated memory is still 67.1 MB. Free memory was 49.5 MB in the beginning and 48.6 MB in the end (delta: 922.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:41:18,797 INFO L168 Benchmark]: RCFGBuilder took 327.83 ms. Allocated memory is still 67.1 MB. Free memory was 48.6 MB in the beginning and 37.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:18,797 INFO L168 Benchmark]: TraceAbstraction took 352.34 ms. Allocated memory is still 67.1 MB. Free memory was 36.5 MB in the beginning and 33.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:18,798 INFO L168 Benchmark]: Witness Printer took 3.45 ms. Allocated memory is still 67.1 MB. Free memory was 33.7 MB in the beginning and 33.4 MB in the end (delta: 286.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:41:18,801 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 54.5 MB. Free memory was 37.2 MB in the beginning and 37.1 MB in the end (delta: 41.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 207.57 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.9 MB in the beginning and 51.1 MB in the end (delta: -19.2 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.43 ms. Allocated memory is still 67.1 MB. Free memory was 50.9 MB in the beginning and 49.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.03 ms. Allocated memory is still 67.1 MB. Free memory was 49.5 MB in the beginning and 48.6 MB in the end (delta: 922.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 327.83 ms. Allocated memory is still 67.1 MB. Free memory was 48.6 MB in the beginning and 37.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 352.34 ms. Allocated memory is still 67.1 MB. Free memory was 36.5 MB in the beginning and 33.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * Witness Printer took 3.45 ms. Allocated memory is still 67.1 MB. Free memory was 33.7 MB in the beginning and 33.4 MB in the end (delta: 286.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x <= -1e-20f || x >= 1e-20f [L23] y = x * x [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 279.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.5ms, AutomataDifference: 30.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10.1ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.6ms SsaConstructionTime, 35.1ms SatisfiabilityAnalysisTime, 37.9ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-26 00:41:18,842 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... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 00:41:20,632 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2021-08-26 00:41:20,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 00:41:20,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 00:41:20,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 00:41:20,735 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 00:41:20,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 00:41:20,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 00:41:20,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 00:41:20,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 00:41:20,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 00:41:20,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 00:41:20,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 00:41:20,743 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 00:41:20,779 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 00:41:20,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 00:41:20,781 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 00:41:20,781 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 00:41:20,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 00:41:20,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 00:41:20,783 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 00:41:20,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 00:41:20,784 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 00:41:20,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 00:41:20,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 00:41:20,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 00:41:20,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 00:41:20,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 00:41:20,786 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 00:41:20,786 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 00:41:20,786 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 00:41:20,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 00:41:20,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 00:41:20,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 00:41:20,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 00:41:20,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 00:41:20,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 00:41:20,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:41:20,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 00:41:20,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 00:41:20,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 00:41:20,788 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 00:41:20,789 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 00:41:20,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 00:41:20,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 00:41:20,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 00:41:20,790 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052b65435ce93a43ae641d125fc7546191d1b08e [2021-08-26 00:41:21,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 00:41:21,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 00:41:21,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 00:41:21,138 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 00:41:21,139 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 00:41:21,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square-2.c [2021-08-26 00:41:21,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86c4b370b/a493534bc48649638d21bfb89db59c89/FLAG19ddf4727 [2021-08-26 00:41:21,614 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 00:41:21,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-2.c [2021-08-26 00:41:21,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86c4b370b/a493534bc48649638d21bfb89db59c89/FLAG19ddf4727 [2021-08-26 00:41:22,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86c4b370b/a493534bc48649638d21bfb89db59c89 [2021-08-26 00:41:22,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 00:41:22,052 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 00:41:22,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 00:41:22,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 00:41:22,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 00:41:22,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:41:22" (1/1) ... [2021-08-26 00:41:22,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78dbe65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:22, skipping insertion in model container [2021-08-26 00:41:22,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:41:22" (1/1) ... [2021-08-26 00:41:22,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 00:41:22,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 00:41:22,187 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-2.c[484,497] [2021-08-26 00:41:22,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:41:22,206 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 00:41:22,217 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-2.c[484,497] [2021-08-26 00:41:22,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:41:22,260 INFO L208 MainTranslator]: Completed translation [2021-08-26 00:41:22,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:22 WrapperNode [2021-08-26 00:41:22,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 00:41:22,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 00:41:22,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 00:41:22,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 00:41:22,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:22" (1/1) ... [2021-08-26 00:41:22,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:22" (1/1) ... [2021-08-26 00:41:22,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 00:41:22,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 00:41:22,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 00:41:22,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 00:41:22,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:22" (1/1) ... [2021-08-26 00:41:22,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:22" (1/1) ... [2021-08-26 00:41:22,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:22" (1/1) ... [2021-08-26 00:41:22,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:22" (1/1) ... [2021-08-26 00:41:22,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:22" (1/1) ... [2021-08-26 00:41:22,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:22" (1/1) ... [2021-08-26 00:41:22,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:22" (1/1) ... [2021-08-26 00:41:22,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 00:41:22,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 00:41:22,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 00:41:22,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 00:41:22,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:22" (1/1) ... [2021-08-26 00:41:22,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:41:22,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 00:41:22,374 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) [2021-08-26 00:41:22,400 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 [2021-08-26 00:41:22,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 00:41:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 00:41:22,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 00:41:22,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 00:41:24,050 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 00:41:24,050 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-26 00:41:24,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:41:24 BoogieIcfgContainer [2021-08-26 00:41:24,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 00:41:24,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 00:41:24,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 00:41:24,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 00:41:24,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:41:22" (1/3) ... [2021-08-26 00:41:24,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a44a793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:41:24, skipping insertion in model container [2021-08-26 00:41:24,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:41:22" (2/3) ... [2021-08-26 00:41:24,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a44a793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:41:24, skipping insertion in model container [2021-08-26 00:41:24,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:41:24" (3/3) ... [2021-08-26 00:41:24,058 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2021-08-26 00:41:24,062 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 00:41:24,063 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 00:41:24,106 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 00:41:24,112 INFO L339 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, mConcurrency=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 00:41:24,112 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 00:41:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-08-26 00:41:24,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 00:41:24,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:41:24,127 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 00:41:24,127 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:41:24,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:41:24,132 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2021-08-26 00:41:24,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 00:41:24,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958987597] [2021-08-26 00:41:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:41:24,142 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 00:41:24,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 00:41:24,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 00:41:24,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-26 00:41:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 00:41:24,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-26 00:41:24,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 00:41:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 00:41:24,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 00:41:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 00:41:24,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 00:41:24,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958987597] [2021-08-26 00:41:24,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958987597] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 00:41:24,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 00:41:24,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-26 00:41:24,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855157241] [2021-08-26 00:41:24,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 00:41:24,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 00:41:24,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 00:41:24,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 00:41:24,454 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-08-26 00:41:24,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 00:41:24,466 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-08-26 00:41:24,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 00:41:24,467 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-08-26 00:41:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 00:41:24,473 INFO L225 Difference]: With dead ends: 21 [2021-08-26 00:41:24,474 INFO L226 Difference]: Without dead ends: 7 [2021-08-26 00:41:24,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 00:41:24,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-08-26 00:41:24,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-08-26 00:41:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 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) [2021-08-26 00:41:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-08-26 00:41:24,504 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-08-26 00:41:24,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 00:41:24,505 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-08-26 00:41:24,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-08-26 00:41:24,506 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-08-26 00:41:24,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 00:41:24,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:41:24,506 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 00:41:24,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-08-26 00:41:24,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 00:41:24,718 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:41:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:41:24,719 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2021-08-26 00:41:24,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 00:41:24,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506199426] [2021-08-26 00:41:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:41:24,720 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 00:41:24,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 00:41:24,721 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 00:41:24,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-26 00:41:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 00:41:24,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 00:41:24,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 00:41:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 00:41:26,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 00:41:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 00:41:27,378 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 00:41:27,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506199426] [2021-08-26 00:41:27,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506199426] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 00:41:27,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 00:41:27,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 3] imperfect sequences [] total 7 [2021-08-26 00:41:27,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506734263] [2021-08-26 00:41:27,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 00:41:27,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 00:41:27,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 00:41:27,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-26 00:41:27,382 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-08-26 00:41:27,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 00:41:27,744 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2021-08-26 00:41:27,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 00:41:27,745 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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 6 [2021-08-26 00:41:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 00:41:27,745 INFO L225 Difference]: With dead ends: 7 [2021-08-26 00:41:27,745 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 00:41:27,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 333.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-26 00:41:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 00:41:27,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 00:41:27,746 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) [2021-08-26 00:41:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 00:41:27,746 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2021-08-26 00:41:27,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 00:41:27,747 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 00:41:27,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-08-26 00:41:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 00:41:27,747 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 00:41:27,749 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 00:41:27,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-26 00:41:27,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 00:41:27,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 00:41:27,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 00:41:27,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 00:41:27,988 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 00:41:27,988 INFO L860 garLoopResultBuilder]: At program point L27(lines 15 28) the Hoare annotation is: true [2021-08-26 00:41:27,988 INFO L857 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2021-08-26 00:41:27,989 INFO L857 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2021-08-26 00:41:27,989 INFO L857 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2021-08-26 00:41:27,989 INFO L860 garLoopResultBuilder]: At program point L13-3(line 13) the Hoare annotation is: true [2021-08-26 00:41:27,989 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 00:41:27,989 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 00:41:27,989 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 00:41:27,990 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-08-26 00:41:27,990 INFO L857 garLoopResultBuilder]: For program point L22-1(lines 22 26) no Hoare annotation was computed. [2021-08-26 00:41:27,990 INFO L857 garLoopResultBuilder]: For program point L10(lines 22 26) no Hoare annotation was computed. [2021-08-26 00:41:27,993 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 00:41:27,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:41:27 BoogieIcfgContainer [2021-08-26 00:41:27,998 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 00:41:27,999 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 00:41:27,999 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 00:41:27,999 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 00:41:27,999 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:41:24" (3/4) ... [2021-08-26 00:41:28,002 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 00:41:28,010 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-26 00:41:28,010 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 00:41:28,010 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-26 00:41:28,011 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 00:41:28,035 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 00:41:28,036 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 00:41:28,037 INFO L168 Benchmark]: Toolchain (without parser) took 5984.23 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.7 MB in the beginning and 30.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:28,038 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 54.5 MB. Free memory was 35.8 MB in the beginning and 35.7 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:41:28,038 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.08 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.6 MB in the beginning and 51.2 MB in the end (delta: -19.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:28,038 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.81 ms. Allocated memory is still 67.1 MB. Free memory was 51.0 MB in the beginning and 49.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:41:28,039 INFO L168 Benchmark]: Boogie Preprocessor took 41.15 ms. Allocated memory is still 67.1 MB. Free memory was 49.7 MB in the beginning and 48.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:41:28,039 INFO L168 Benchmark]: RCFGBuilder took 1716.11 ms. Allocated memory is still 67.1 MB. Free memory was 48.5 MB in the beginning and 36.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:28,040 INFO L168 Benchmark]: TraceAbstraction took 3945.13 ms. Allocated memory is still 67.1 MB. Free memory was 36.0 MB in the beginning and 32.6 MB in the end (delta: 3.4 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:28,040 INFO L168 Benchmark]: Witness Printer took 37.16 ms. Allocated memory is still 67.1 MB. Free memory was 32.6 MB in the beginning and 30.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 00:41:28,042 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 54.5 MB. Free memory was 35.8 MB in the beginning and 35.7 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 206.08 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.6 MB in the beginning and 51.2 MB in the end (delta: -19.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.81 ms. Allocated memory is still 67.1 MB. Free memory was 51.0 MB in the beginning and 49.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.15 ms. Allocated memory is still 67.1 MB. Free memory was 49.7 MB in the beginning and 48.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1716.11 ms. Allocated memory is still 67.1 MB. Free memory was 48.5 MB in the beginning and 36.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3945.13 ms. Allocated memory is still 67.1 MB. Free memory was 36.0 MB in the beginning and 32.6 MB in the end (delta: 3.4 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. * Witness Printer took 37.16 ms. Allocated memory is still 67.1 MB. Free memory was 32.6 MB in the beginning and 30.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: 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, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3897.3ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.6ms, AutomataDifference: 405.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 27.6ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 4 SDslu, 1 SDs, 0 SdLazy, 8 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 178.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 333.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13.1ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 21.6ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 2.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 22.3ms SsaConstructionTime, 121.9ms SatisfiabilityAnalysisTime, 2667.7ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 78 SizeOfPredicates, 6 NumberOfNonLiveVariables, 64 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 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: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-26 00:41:28,098 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...