./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/sqrt_poly2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/sqrt_poly2.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 1d97d268d682e2021ff98bdbb1deaf100696d038 ...................................................................................................................................................................................................................................................................................................................... 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/sqrt_poly2.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 1d97d268d682e2021ff98bdbb1deaf100696d038 ...................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 07:30:04,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 07:30:04,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 07:30:04,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 07:30:04,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 07:30:04,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 07:30:04,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 07:30:04,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 07:30:04,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 07:30:04,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 07:30:04,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 07:30:04,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 07:30:04,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 07:30:04,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 07:30:04,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 07:30:04,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 07:30:04,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 07:30:04,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 07:30:04,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 07:30:04,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 07:30:04,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 07:30:04,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 07:30:04,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 07:30:04,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 07:30:04,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 07:30:04,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 07:30:04,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 07:30:04,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 07:30:04,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 07:30:04,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 07:30:04,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 07:30:04,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 07:30:04,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 07:30:04,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 07:30:04,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 07:30:04,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 07:30:04,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 07:30:04,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 07:30:04,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 07:30:04,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 07:30:04,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 07:30:04,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 07:30:04,980 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 07:30:04,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 07:30:04,981 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 07:30:04,981 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 07:30:04,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 07:30:04,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 07:30:04,984 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 07:30:04,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 07:30:04,984 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 07:30:04,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 07:30:04,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 07:30:04,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 07:30:04,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 07:30:04,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 07:30:04,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 07:30:04,986 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 07:30:04,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 07:30:04,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 07:30:04,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 07:30:04,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 07:30:04,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 07:30:04,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 07:30:04,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 07:30:04,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 07:30:04,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 07:30:04,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 07:30:04,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 07:30:04,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 07:30:04,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 07:30:04,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 07:30:04,989 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2021-08-29 07:30:05,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 07:30:05,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 07:30:05,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 07:30:05,381 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 07:30:05,382 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 07:30:05,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-08-29 07:30:05,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/715e9981d/2a4cb501ab7f437cbd5b84076d38e350/FLAG4f8f07b8f [2021-08-29 07:30:05,866 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 07:30:05,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-08-29 07:30:05,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/715e9981d/2a4cb501ab7f437cbd5b84076d38e350/FLAG4f8f07b8f [2021-08-29 07:30:05,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/715e9981d/2a4cb501ab7f437cbd5b84076d38e350 [2021-08-29 07:30:05,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 07:30:05,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 07:30:05,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 07:30:05,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 07:30:05,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 07:30:05,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:30:05" (1/1) ... [2021-08-29 07:30:05,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@640c0473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:05, skipping insertion in model container [2021-08-29 07:30:05,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:30:05" (1/1) ... [2021-08-29 07:30:05,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 07:30:05,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 07:30:06,068 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/sqrt_poly2.c[587,600] [2021-08-29 07:30:06,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 07:30:06,110 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 07:30:06,164 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/sqrt_poly2.c[587,600] [2021-08-29 07:30:06,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 07:30:06,203 INFO L208 MainTranslator]: Completed translation [2021-08-29 07:30:06,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:06 WrapperNode [2021-08-29 07:30:06,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 07:30:06,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 07:30:06,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 07:30:06,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 07:30:06,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:06" (1/1) ... [2021-08-29 07:30:06,228 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:06" (1/1) ... [2021-08-29 07:30:06,252 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 07:30:06,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 07:30:06,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 07:30:06,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 07:30:06,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:06" (1/1) ... [2021-08-29 07:30:06,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:06" (1/1) ... [2021-08-29 07:30:06,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:06" (1/1) ... [2021-08-29 07:30:06,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:06" (1/1) ... [2021-08-29 07:30:06,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:06" (1/1) ... [2021-08-29 07:30:06,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:06" (1/1) ... [2021-08-29 07:30:06,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:06" (1/1) ... [2021-08-29 07:30:06,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 07:30:06,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 07:30:06,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 07:30:06,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 07:30:06,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:06" (1/1) ... [2021-08-29 07:30:06,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 07:30:06,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 07:30:06,326 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) [2021-08-29 07:30:06,354 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 [2021-08-29 07:30:06,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 07:30:06,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 07:30:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-08-29 07:30:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 07:30:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-08-29 07:30:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 07:30:06,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 07:30:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 07:30:06,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 07:30:06,576 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 07:30:06,576 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-08-29 07:30:06,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:30:06 BoogieIcfgContainer [2021-08-29 07:30:06,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 07:30:06,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 07:30:06,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 07:30:06,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 07:30:06,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:30:05" (1/3) ... [2021-08-29 07:30:06,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b755b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:30:06, skipping insertion in model container [2021-08-29 07:30:06,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:06" (2/3) ... [2021-08-29 07:30:06,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b755b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:30:06, skipping insertion in model container [2021-08-29 07:30:06,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:30:06" (3/3) ... [2021-08-29 07:30:06,589 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2021-08-29 07:30:06,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 07:30:06,594 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 07:30:06,654 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 07:30:06,662 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 [2021-08-29 07:30:06,662 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 07:30:06,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 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) [2021-08-29 07:30:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 07:30:06,679 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 07:30:06,679 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 07:30:06,680 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 07:30:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 07:30:06,685 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2021-08-29 07:30:06,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 07:30:06,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743940445] [2021-08-29 07:30:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 07:30:06,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 07:30:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 07:30:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 07:30:06,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 07:30:06,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743940445] [2021-08-29 07:30:06,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743940445] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 07:30:06,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 07:30:06,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 07:30:06,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182490787] [2021-08-29 07:30:06,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 07:30:06,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 07:30:06,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 07:30:06,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 07:30:06,914 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 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 4.5) internal successors, (9), 2 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) [2021-08-29 07:30:06,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 07:30:06,974 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-08-29 07:30:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 07:30:06,979 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) Word has length 9 [2021-08-29 07:30:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 07:30:06,984 INFO L225 Difference]: With dead ends: 25 [2021-08-29 07:30:07,000 INFO L226 Difference]: Without dead ends: 10 [2021-08-29 07:30:07,003 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 07:30:07,007 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.22ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.49ms IncrementalHoareTripleChecker+Time [2021-08-29 07:30:07,008 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 14 Unknown, 0 Unchecked, 0.22ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 47.49ms Time] [2021-08-29 07:30:07,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-08-29 07:30:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-08-29 07:30:07,038 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) [2021-08-29 07:30:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-08-29 07:30:07,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2021-08-29 07:30:07,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 07:30:07,040 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-08-29 07:30:07,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2021-08-29 07:30:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-08-29 07:30:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 07:30:07,041 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 07:30:07,041 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 07:30:07,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 07:30:07,042 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 07:30:07,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 07:30:07,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2021-08-29 07:30:07,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 07:30:07,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498676664] [2021-08-29 07:30:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 07:30:07,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 07:30:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 07:30:07,119 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 07:30:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 07:30:07,182 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 07:30:07,182 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 07:30:07,183 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 07:30:07,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 07:30:07,190 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 07:30:07,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 07:30:07 BoogieIcfgContainer [2021-08-29 07:30:07,212 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 07:30:07,213 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 07:30:07,213 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 07:30:07,213 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 07:30:07,214 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:30:06" (3/4) ... [2021-08-29 07:30:07,216 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-29 07:30:07,216 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 07:30:07,217 INFO L158 Benchmark]: Toolchain (without parser) took 1323.40ms. Allocated memory was 60.8MB in the beginning and 77.6MB in the end (delta: 16.8MB). Free memory was 39.9MB in the beginning and 53.6MB in the end (delta: -13.6MB). Peak memory consumption was 1.7MB. Max. memory is 16.1GB. [2021-08-29 07:30:07,217 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 60.8MB. Free memory was 43.0MB in the beginning and 42.9MB in the end (delta: 81.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 07:30:07,218 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.11ms. Allocated memory is still 60.8MB. Free memory was 39.7MB in the beginning and 43.6MB in the end (delta: -3.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-29 07:30:07,218 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.46ms. Allocated memory is still 60.8MB. Free memory was 43.6MB in the beginning and 42.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 07:30:07,219 INFO L158 Benchmark]: Boogie Preprocessor took 42.73ms. Allocated memory is still 60.8MB. Free memory was 42.0MB in the beginning and 40.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 07:30:07,219 INFO L158 Benchmark]: RCFGBuilder took 281.82ms. Allocated memory is still 60.8MB. Free memory was 40.8MB in the beginning and 31.1MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 07:30:07,220 INFO L158 Benchmark]: TraceAbstraction took 631.99ms. Allocated memory was 60.8MB in the beginning and 77.6MB in the end (delta: 16.8MB). Free memory was 30.7MB in the beginning and 53.6MB in the end (delta: -22.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 07:30:07,220 INFO L158 Benchmark]: Witness Printer took 3.44ms. Allocated memory is still 77.6MB. Free memory is still 53.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 07:30:07,222 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 60.8MB. Free memory was 43.0MB in the beginning and 42.9MB in the end (delta: 81.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.11ms. Allocated memory is still 60.8MB. Free memory was 39.7MB in the beginning and 43.6MB in the end (delta: -3.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.46ms. Allocated memory is still 60.8MB. Free memory was 43.6MB in the beginning and 42.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.73ms. Allocated memory is still 60.8MB. Free memory was 42.0MB in the beginning and 40.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 281.82ms. Allocated memory is still 60.8MB. Free memory was 40.8MB in the beginning and 31.1MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 631.99ms. Allocated memory was 60.8MB in the beginning and 77.6MB in the end (delta: 16.8MB). Free memory was 30.7MB in the beginning and 53.6MB in the end (delta: -22.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.44ms. Allocated memory is still 77.6MB. Free memory is still 53.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 38, overapproximation of someUnaryDOUBLEoperation at line 20, overapproximation of someBinaryArithmeticDOUBLEoperation at line 51, overapproximation of bitwiseAnd at line 37, overapproximation of someBinaryDOUBLEComparisonOperation at line 65. Possible FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L12] COND FALSE !(!cond) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L31] union u x; [L32] double r; [L33] int exp; [L35] x.d = a [L37] EXPR x.i[0] [L37] exp = (x.i[0] & 0x7FF00000) >> 20 [L38] EXPR x.i[0] [L38] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L39] EXPR x.d [L39] r = x.d * 0.5 [L41] r = C1+C2+(C3+(C4+C5*r)*r)*r VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L43] COND TRUE exp % 2 == 0 [L44] exp++ VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] r = r * x.d [L53] return r; [L53] return r; VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L63] y = sqrt_custom(x) [L14] COND TRUE !(cond) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L14] reach_error() VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 536.89ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.14ms, AutomataDifference: 123.19ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 9.52ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 47.49ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 43.04ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14 IncrementalHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 0 mSDtfsCounter, 14 mSolverCounterSat, 0.22ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 10.92ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 15.80ms SsaConstructionTime, 110.55ms SatisfiabilityAnalysisTime, 71.52ms InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 8 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 [2021-08-29 07:30:07,259 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-wip.dd.seqcomp-5fbdf5b [2021-08-29 07:30:09,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 07:30:09,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 07:30:09,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 07:30:09,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 07:30:09,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 07:30:09,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 07:30:09,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 07:30:09,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 07:30:09,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 07:30:09,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 07:30:09,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 07:30:09,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 07:30:09,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 07:30:09,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 07:30:09,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 07:30:09,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 07:30:09,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 07:30:09,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 07:30:09,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 07:30:09,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 07:30:09,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 07:30:09,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 07:30:09,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 07:30:09,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 07:30:09,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 07:30:09,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 07:30:09,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 07:30:09,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 07:30:09,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 07:30:09,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 07:30:09,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 07:30:09,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 07:30:09,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 07:30:09,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 07:30:09,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 07:30:09,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 07:30:09,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 07:30:09,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 07:30:09,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 07:30:09,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 07:30:09,421 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-29 07:30:09,451 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 07:30:09,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 07:30:09,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 07:30:09,453 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 07:30:09,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 07:30:09,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 07:30:09,455 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 07:30:09,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 07:30:09,456 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 07:30:09,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 07:30:09,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 07:30:09,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 07:30:09,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 07:30:09,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 07:30:09,457 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-29 07:30:09,457 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-29 07:30:09,458 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 07:30:09,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 07:30:09,458 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 07:30:09,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 07:30:09,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 07:30:09,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 07:30:09,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 07:30:09,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 07:30:09,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 07:30:09,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 07:30:09,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 07:30:09,460 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-29 07:30:09,460 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-29 07:30:09,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 07:30:09,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 07:30:09,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-29 07:30:09,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2021-08-29 07:30:09,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 07:30:09,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 07:30:09,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 07:30:09,768 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 07:30:09,769 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 07:30:09,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-08-29 07:30:09,827 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ff74443b/8357d604cad549c798b41bea86178f06/FLAG243e7cd0a [2021-08-29 07:30:10,213 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 07:30:10,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-08-29 07:30:10,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ff74443b/8357d604cad549c798b41bea86178f06/FLAG243e7cd0a [2021-08-29 07:30:10,634 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ff74443b/8357d604cad549c798b41bea86178f06 [2021-08-29 07:30:10,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 07:30:10,639 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 07:30:10,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 07:30:10,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 07:30:10,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 07:30:10,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:30:10" (1/1) ... [2021-08-29 07:30:10,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3074b43a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:10, skipping insertion in model container [2021-08-29 07:30:10,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:30:10" (1/1) ... [2021-08-29 07:30:10,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 07:30:10,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 07:30:10,810 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/sqrt_poly2.c[587,600] [2021-08-29 07:30:10,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 07:30:10,861 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 07:30:10,899 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/sqrt_poly2.c[587,600] [2021-08-29 07:30:10,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 07:30:10,927 INFO L208 MainTranslator]: Completed translation [2021-08-29 07:30:10,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:10 WrapperNode [2021-08-29 07:30:10,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 07:30:10,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 07:30:10,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 07:30:10,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 07:30:10,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:10" (1/1) ... [2021-08-29 07:30:10,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:10" (1/1) ... [2021-08-29 07:30:10,972 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 07:30:10,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 07:30:10,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 07:30:10,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 07:30:10,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:10" (1/1) ... [2021-08-29 07:30:10,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:10" (1/1) ... [2021-08-29 07:30:10,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:10" (1/1) ... [2021-08-29 07:30:10,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:10" (1/1) ... [2021-08-29 07:30:11,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:10" (1/1) ... [2021-08-29 07:30:11,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:10" (1/1) ... [2021-08-29 07:30:11,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:10" (1/1) ... [2021-08-29 07:30:11,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 07:30:11,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 07:30:11,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 07:30:11,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 07:30:11,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:10" (1/1) ... [2021-08-29 07:30:11,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 07:30:11,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 07:30:11,056 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) [2021-08-29 07:30:11,080 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 [2021-08-29 07:30:11,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-08-29 07:30:11,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-08-29 07:30:11,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-29 07:30:11,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 07:30:11,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-29 07:30:11,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 07:30:11,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 07:30:11,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 07:30:11,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-29 07:30:11,290 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 07:30:11,290 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-08-29 07:30:11,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:30:11 BoogieIcfgContainer [2021-08-29 07:30:11,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 07:30:11,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 07:30:11,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 07:30:11,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 07:30:11,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:30:10" (1/3) ... [2021-08-29 07:30:11,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3a2fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:30:11, skipping insertion in model container [2021-08-29 07:30:11,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:30:10" (2/3) ... [2021-08-29 07:30:11,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3a2fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:30:11, skipping insertion in model container [2021-08-29 07:30:11,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:30:11" (3/3) ... [2021-08-29 07:30:11,298 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2021-08-29 07:30:11,303 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 07:30:11,303 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 07:30:11,346 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 07:30:11,352 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 [2021-08-29 07:30:11,353 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 07:30:11,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 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) [2021-08-29 07:30:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 07:30:11,368 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 07:30:11,369 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 07:30:11,369 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 07:30:11,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 07:30:11,374 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2021-08-29 07:30:11,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 07:30:11,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193968808] [2021-08-29 07:30:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 07:30:11,385 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 07:30:11,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 07:30:11,387 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) [2021-08-29 07:30:11,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-29 07:30:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 07:30:12,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-29 07:30:12,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 07:30:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 07:30:12,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 07:30:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 07:30:12,791 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 07:30:12,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193968808] [2021-08-29 07:30:12,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193968808] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 07:30:12,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 07:30:12,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-29 07:30:12,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583671544] [2021-08-29 07:30:12,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 07:30:12,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 07:30:12,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 07:30:12,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 07:30:12,818 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 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 4.5) internal successors, (9), 2 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) [2021-08-29 07:30:15,309 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-08-29 07:30:17,542 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 07:30:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 07:30:17,851 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-08-29 07:30:17,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 07:30:17,857 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) Word has length 9 [2021-08-29 07:30:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 07:30:17,867 INFO L225 Difference]: With dead ends: 25 [2021-08-29 07:30:17,867 INFO L226 Difference]: Without dead ends: 10 [2021-08-29 07:30:17,869 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.10ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 07:30:17,882 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4774.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.31ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5015.84ms IncrementalHoareTripleChecker+Time [2021-08-29 07:30:17,883 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 14 Unknown, 0 Unchecked, 0.31ms Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 1 Unknown, 0 Unchecked, 5015.84ms Time] [2021-08-29 07:30:17,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-08-29 07:30:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-08-29 07:30:17,902 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) [2021-08-29 07:30:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-08-29 07:30:17,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2021-08-29 07:30:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 07:30:17,903 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-08-29 07:30:17,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2021-08-29 07:30:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-08-29 07:30:17,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 07:30:17,904 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 07:30:17,904 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 07:30:17,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-08-29 07:30:18,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 07:30:18,105 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 07:30:18,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 07:30:18,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2021-08-29 07:30:18,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 07:30:18,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78559894] [2021-08-29 07:30:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 07:30:18,108 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 07:30:18,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 07:30:18,109 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) [2021-08-29 07:30:18,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-29 07:30:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 07:30:19,306 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 07:30:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 07:30:20,648 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-29 07:30:20,650 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 07:30:20,651 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 07:30:20,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-29 07:30:20,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 07:30:20,858 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 07:30:20,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 07:30:20 BoogieIcfgContainer [2021-08-29 07:30:20,887 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 07:30:20,888 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 07:30:20,888 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 07:30:20,888 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 07:30:20,889 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:30:11" (3/4) ... [2021-08-29 07:30:20,890 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 07:30:20,932 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 07:30:20,932 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 07:30:20,933 INFO L158 Benchmark]: Toolchain (without parser) took 10294.06ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 32.0MB in the beginning and 35.9MB in the end (delta: -3.9MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2021-08-29 07:30:20,937 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 54.5MB. Free memory was 37.0MB in the beginning and 36.9MB in the end (delta: 46.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 07:30:20,937 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.00ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 31.8MB in the beginning and 49.8MB in the end (delta: -18.0MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. [2021-08-29 07:30:20,937 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.12ms. Allocated memory is still 67.1MB. Free memory was 49.8MB in the beginning and 48.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 07:30:20,938 INFO L158 Benchmark]: Boogie Preprocessor took 51.13ms. Allocated memory is still 67.1MB. Free memory was 48.1MB in the beginning and 46.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 07:30:20,938 INFO L158 Benchmark]: RCFGBuilder took 266.39ms. Allocated memory is still 67.1MB. Free memory was 46.6MB in the beginning and 36.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 07:30:20,939 INFO L158 Benchmark]: TraceAbstraction took 9594.16ms. Allocated memory is still 67.1MB. Free memory was 36.1MB in the beginning and 38.6MB in the end (delta: -2.5MB). Peak memory consumption was 53.7kB. Max. memory is 16.1GB. [2021-08-29 07:30:20,939 INFO L158 Benchmark]: Witness Printer took 44.25ms. Allocated memory is still 67.1MB. Free memory was 38.3MB in the beginning and 35.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 07:30:20,941 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 54.5MB. Free memory was 37.0MB in the beginning and 36.9MB in the end (delta: 46.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 286.00ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 31.8MB in the beginning and 49.8MB in the end (delta: -18.0MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.12ms. Allocated memory is still 67.1MB. Free memory was 49.8MB in the beginning and 48.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 51.13ms. Allocated memory is still 67.1MB. Free memory was 48.1MB in the beginning and 46.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 266.39ms. Allocated memory is still 67.1MB. Free memory was 46.6MB in the beginning and 36.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 9594.16ms. Allocated memory is still 67.1MB. Free memory was 36.1MB in the beginning and 38.6MB in the end (delta: -2.5MB). Peak memory consumption was 53.7kB. Max. memory is 16.1GB. * Witness Printer took 44.25ms. Allocated memory is still 67.1MB. Free memory was 38.3MB in the beginning and 35.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L12] COND FALSE !(!cond) VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L31] union u x; [L32] double r; [L33] int exp; [L35] x.d = a [L37] EXPR x.i[0] [L37] exp = (x.i[0] & 0x7FF00000) >> 20 [L38] EXPR x.i[0] [L38] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L39] EXPR x.d [L39] r = x.d * 0.5 [L41] r = C1+C2+(C3+(C4+C5*r)*r)*r VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L43] COND TRUE exp % 2 == 0 [L44] exp++ VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] r = r * x.d [L53] return r; [L53] return r; VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L63] y = sqrt_custom(x) [L14] COND TRUE !(cond) VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L14] reach_error() VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9513.15ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.98ms, AutomataDifference: 5085.96ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 7.52ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 5015.84ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 4774.73ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13 IncrementalHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 0 mSDtfsCounter, 13 mSolverCounterSat, 0.31ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.10ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 11.18ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 41.05ms SsaConstructionTime, 2294.03ms SatisfiabilityAnalysisTime, 194.07ms InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 56 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 proved your program to be incorrect! [2021-08-29 07:30:21,070 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...