./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 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/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-dev-20ed64e [2021-08-26 00:59:30,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 00:59:30,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 00:59:30,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 00:59:30,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 00:59:30,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 00:59:30,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 00:59:30,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 00:59:30,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 00:59:30,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 00:59:30,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 00:59:30,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 00:59:30,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 00:59:30,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 00:59:30,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 00:59:30,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 00:59:30,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 00:59:30,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 00:59:30,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 00:59:30,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 00:59:30,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 00:59:31,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 00:59:31,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 00:59:31,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 00:59:31,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 00:59:31,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 00:59:31,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 00:59:31,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 00:59:31,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 00:59:31,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 00:59:31,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 00:59:31,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 00:59:31,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 00:59:31,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 00:59:31,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 00:59:31,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 00:59:31,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 00:59:31,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 00:59:31,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 00:59:31,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 00:59:31,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 00:59:31,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 00:59:31,057 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 00:59:31,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 00:59:31,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 00:59:31,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 00:59:31,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 00:59:31,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 00:59:31,061 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 00:59:31,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 00:59:31,062 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 00:59:31,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 00:59:31,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 00:59:31,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 00:59:31,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 00:59:31,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 00:59:31,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 00:59:31,064 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 00:59:31,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 00:59:31,064 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 00:59:31,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 00:59:31,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 00:59:31,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 00:59:31,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 00:59:31,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:59:31,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 00:59:31,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 00:59:31,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 00:59:31,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 00:59:31,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 00:59:31,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 00:59:31,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 00:59:31,067 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2021-08-26 00:59:31,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 00:59:31,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 00:59:31,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 00:59:31,400 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 00:59:31,401 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 00:59:31,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-08-26 00:59:31,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f8d1ee2/f43e47d22367477bba443db94c3199a8/FLAGf1dee09fc [2021-08-26 00:59:31,918 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 00:59:31,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-08-26 00:59:31,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f8d1ee2/f43e47d22367477bba443db94c3199a8/FLAGf1dee09fc [2021-08-26 00:59:32,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f8d1ee2/f43e47d22367477bba443db94c3199a8 [2021-08-26 00:59:32,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 00:59:32,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 00:59:32,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 00:59:32,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 00:59:32,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 00:59:32,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:59:32" (1/1) ... [2021-08-26 00:59:32,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ba9dc36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:32, skipping insertion in model container [2021-08-26 00:59:32,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:59:32" (1/1) ... [2021-08-26 00:59:32,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 00:59:32,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 00:59:32,596 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] [2021-08-26 00:59:32,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:59:32,634 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 00:59:32,654 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] [2021-08-26 00:59:32,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:59:32,701 INFO L208 MainTranslator]: Completed translation [2021-08-26 00:59:32,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:32 WrapperNode [2021-08-26 00:59:32,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 00:59:32,706 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 00:59:32,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 00:59:32,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 00:59:32,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:32" (1/1) ... [2021-08-26 00:59:32,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:32" (1/1) ... [2021-08-26 00:59:32,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 00:59:32,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 00:59:32,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 00:59:32,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 00:59:32,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:32" (1/1) ... [2021-08-26 00:59:32,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:32" (1/1) ... [2021-08-26 00:59:32,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:32" (1/1) ... [2021-08-26 00:59:32,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:32" (1/1) ... [2021-08-26 00:59:32,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:32" (1/1) ... [2021-08-26 00:59:32,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:32" (1/1) ... [2021-08-26 00:59:32,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:32" (1/1) ... [2021-08-26 00:59:32,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 00:59:32,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 00:59:32,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 00:59:32,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 00:59:32,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:32" (1/1) ... [2021-08-26 00:59:32,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:59:32,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 00:59:32,822 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 00:59:32,848 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 00:59:32,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 00:59:32,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 00:59:32,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-08-26 00:59:32,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 00:59:32,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-08-26 00:59:32,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 00:59:32,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 00:59:32,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 00:59:32,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 00:59:33,222 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 00:59:33,223 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-08-26 00:59:33,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:59:33 BoogieIcfgContainer [2021-08-26 00:59:33,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 00:59:33,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 00:59:33,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 00:59:33,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 00:59:33,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:59:32" (1/3) ... [2021-08-26 00:59:33,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d505c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:59:33, skipping insertion in model container [2021-08-26 00:59:33,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:32" (2/3) ... [2021-08-26 00:59:33,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d505c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:59:33, skipping insertion in model container [2021-08-26 00:59:33,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:59:33" (3/3) ... [2021-08-26 00:59:33,245 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2021-08-26 00:59:33,249 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 00:59:33,249 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 00:59:33,300 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 00:59:33,307 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 00:59:33,308 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 00:59:33,320 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) [2021-08-26 00:59:33,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 00:59:33,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:59:33,324 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 00:59:33,325 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:59:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:59:33,328 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2021-08-26 00:59:33,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 00:59:33,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955387303] [2021-08-26 00:59:33,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:59:33,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 00:59:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 00:59:33,459 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 00:59:33,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 00:59:33,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955387303] [2021-08-26 00:59:33,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955387303] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 00:59:33,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 00:59:33,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 00:59:33,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948335740] [2021-08-26 00:59:33,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 00:59:33,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 00:59:33,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 00:59:33,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 00:59:33,494 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) [2021-08-26 00:59:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 00:59:33,505 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-08-26 00:59:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 00:59:33,506 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 [2021-08-26 00:59:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 00:59:33,512 INFO L225 Difference]: With dead ends: 25 [2021-08-26 00:59:33,512 INFO L226 Difference]: Without dead ends: 10 [2021-08-26 00:59:33,514 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 00:59:33,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-08-26 00:59:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-08-26 00:59:33,535 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) [2021-08-26 00:59:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-08-26 00:59:33,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2021-08-26 00:59:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 00:59:33,537 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-08-26 00:59:33,537 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) [2021-08-26 00:59:33,537 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-08-26 00:59:33,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 00:59:33,538 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:59:33,538 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 00:59:33,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 00:59:33,538 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:59:33,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:59:33,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2021-08-26 00:59:33,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 00:59:33,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503198139] [2021-08-26 00:59:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:59:33,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 00:59:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 00:59:33,633 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 00:59:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 00:59:33,710 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 00:59:33,710 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 00:59:33,712 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 00:59:33,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 00:59:33,717 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 00:59:33,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:59:33 BoogieIcfgContainer [2021-08-26 00:59:33,737 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 00:59:33,738 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 00:59:33,738 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 00:59:33,738 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 00:59:33,739 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:59:33" (3/4) ... [2021-08-26 00:59:33,741 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 00:59:33,741 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 00:59:33,743 INFO L168 Benchmark]: Toolchain (without parser) took 1295.02 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 24.0 MB in the beginning and 32.0 MB in the end (delta: -8.1 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2021-08-26 00:59:33,744 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 48.2 MB. Free memory was 30.8 MB in the beginning and 30.7 MB in the end (delta: 41.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:59:33,744 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.12 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 23.8 MB in the beginning and 46.2 MB in the end (delta: -22.4 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-08-26 00:59:33,746 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.56 ms. Allocated memory is still 62.9 MB. Free memory was 46.2 MB in the beginning and 44.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:59:33,747 INFO L168 Benchmark]: Boogie Preprocessor took 39.17 ms. Allocated memory is still 62.9 MB. Free memory was 44.5 MB in the beginning and 43.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 00:59:33,749 INFO L168 Benchmark]: RCFGBuilder took 430.44 ms. Allocated memory is still 62.9 MB. Free memory was 43.3 MB in the beginning and 41.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2021-08-26 00:59:33,750 INFO L168 Benchmark]: TraceAbstraction took 511.76 ms. Allocated memory is still 62.9 MB. Free memory was 41.3 MB in the beginning and 32.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2021-08-26 00:59:33,751 INFO L168 Benchmark]: Witness Printer took 3.47 ms. Allocated memory is still 62.9 MB. Free memory was 32.3 MB in the beginning and 32.0 MB in the end (delta: 287.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:59:33,754 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 48.2 MB. Free memory was 30.8 MB in the beginning and 30.7 MB in the end (delta: 41.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 256.12 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 23.8 MB in the beginning and 46.2 MB in the end (delta: -22.4 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.56 ms. Allocated memory is still 62.9 MB. Free memory was 46.2 MB in the beginning and 44.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.17 ms. Allocated memory is still 62.9 MB. Free memory was 44.5 MB in the beginning and 43.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 430.44 ms. Allocated memory is still 62.9 MB. Free memory was 43.3 MB in the beginning and 41.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 511.76 ms. Allocated memory is still 62.9 MB. Free memory was 41.3 MB in the beginning and 32.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. * Witness Printer took 3.47 ms. Allocated memory is still 62.9 MB. Free memory was 32.3 MB in the beginning and 32.0 MB in the end (delta: 287.4 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: 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: 418.4ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.1ms, AutomataDifference: 47.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14 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=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, 0.0ms DumpTime, AutomataMinimizationStatistics: 11.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.5ms SsaConstructionTime, 110.1ms SatisfiabilityAnalysisTime, 40.7ms 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 [2021-08-26 00:59:33,799 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 00:59:35,649 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2021-08-26 00:59:35,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 00:59:35,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 00:59:35,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 00:59:35,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 00:59:35,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 00:59:35,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 00:59:35,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 00:59:35,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 00:59:35,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 00:59:35,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 00:59:35,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 00:59:35,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 00:59:35,800 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 00:59:35,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 00:59:35,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 00:59:35,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 00:59:35,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 00:59:35,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 00:59:35,804 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 00:59:35,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 00:59:35,805 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 00:59:35,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 00:59:35,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 00:59:35,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 00:59:35,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 00:59:35,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 00:59:35,807 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 00:59:35,807 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 00:59:35,807 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 00:59:35,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 00:59:35,807 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 00:59:35,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 00:59:35,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 00:59:35,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 00:59:35,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 00:59:35,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:59:35,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 00:59:35,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 00:59:35,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 00:59:35,809 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 00:59:35,810 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 00:59:35,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 00:59:35,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 00:59:35,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 00:59:35,811 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2021-08-26 00:59:36,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 00:59:36,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 00:59:36,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 00:59:36,163 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 00:59:36,164 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 00:59:36,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-08-26 00:59:36,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d44d944/9c608c31084743c897515bddbfdfeda2/FLAGfd317a596 [2021-08-26 00:59:36,595 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 00:59:36,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-08-26 00:59:36,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d44d944/9c608c31084743c897515bddbfdfeda2/FLAGfd317a596 [2021-08-26 00:59:36,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d44d944/9c608c31084743c897515bddbfdfeda2 [2021-08-26 00:59:36,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 00:59:36,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 00:59:37,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 00:59:37,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 00:59:37,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 00:59:37,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:59:36" (1/1) ... [2021-08-26 00:59:37,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5154abe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:37, skipping insertion in model container [2021-08-26 00:59:37,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:59:36" (1/1) ... [2021-08-26 00:59:37,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 00:59:37,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 00:59:37,167 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] [2021-08-26 00:59:37,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:59:37,193 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 00:59:37,203 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] [2021-08-26 00:59:37,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:59:37,264 INFO L208 MainTranslator]: Completed translation [2021-08-26 00:59:37,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:37 WrapperNode [2021-08-26 00:59:37,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 00:59:37,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 00:59:37,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 00:59:37,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 00:59:37,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:37" (1/1) ... [2021-08-26 00:59:37,290 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:37" (1/1) ... [2021-08-26 00:59:37,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 00:59:37,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 00:59:37,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 00:59:37,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 00:59:37,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:37" (1/1) ... [2021-08-26 00:59:37,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:37" (1/1) ... [2021-08-26 00:59:37,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:37" (1/1) ... [2021-08-26 00:59:37,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:37" (1/1) ... [2021-08-26 00:59:37,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:37" (1/1) ... [2021-08-26 00:59:37,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:37" (1/1) ... [2021-08-26 00:59:37,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:37" (1/1) ... [2021-08-26 00:59:37,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 00:59:37,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 00:59:37,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 00:59:37,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 00:59:37,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:37" (1/1) ... [2021-08-26 00:59:37,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:59:37,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 00:59:37,390 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 00:59:37,419 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 00:59:37,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-08-26 00:59:37,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-08-26 00:59:37,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 00:59:37,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 00:59:37,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-26 00:59:37,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 00:59:37,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 00:59:37,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 00:59:37,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-26 00:59:42,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 00:59:42,172 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-08-26 00:59:42,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:59:42 BoogieIcfgContainer [2021-08-26 00:59:42,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 00:59:42,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 00:59:42,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 00:59:42,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 00:59:42,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:59:36" (1/3) ... [2021-08-26 00:59:42,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ad645f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:59:42, skipping insertion in model container [2021-08-26 00:59:42,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:59:37" (2/3) ... [2021-08-26 00:59:42,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ad645f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:59:42, skipping insertion in model container [2021-08-26 00:59:42,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:59:42" (3/3) ... [2021-08-26 00:59:42,180 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2021-08-26 00:59:42,183 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 00:59:42,184 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 00:59:42,217 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 00:59:42,223 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 00:59:42,223 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 00:59:42,232 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) [2021-08-26 00:59:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 00:59:42,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:59:42,236 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 00:59:42,237 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:59:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:59:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2021-08-26 00:59:42,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 00:59:42,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075119936] [2021-08-26 00:59:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:59:42,252 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 00:59:42,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 00:59:42,265 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 00:59:42,296 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 00:59:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 00:59:43,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-26 00:59:43,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 00:59:43,489 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 00:59:43,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 00:59:43,623 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 00:59:43,624 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 00:59:43,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075119936] [2021-08-26 00:59:43,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075119936] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 00:59:43,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 00:59:43,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-26 00:59:43,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435901877] [2021-08-26 00:59:43,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 00:59:43,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 00:59:43,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 00:59:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 00:59:43,640 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) [2021-08-26 00:59:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 00:59:43,651 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-08-26 00:59:43,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 00:59:43,652 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 [2021-08-26 00:59:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 00:59:43,657 INFO L225 Difference]: With dead ends: 25 [2021-08-26 00:59:43,657 INFO L226 Difference]: Without dead ends: 10 [2021-08-26 00:59:43,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 00:59:43,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-08-26 00:59:43,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-08-26 00:59:43,677 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) [2021-08-26 00:59:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-08-26 00:59:43,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2021-08-26 00:59:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 00:59:43,678 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-08-26 00:59:43,679 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) [2021-08-26 00:59:43,679 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-08-26 00:59:43,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 00:59:43,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:59:43,679 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 00:59:43,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-26 00:59:43,893 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 00:59:43,894 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:59:43,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:59:43,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2021-08-26 00:59:43,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 00:59:43,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165554627] [2021-08-26 00:59:43,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:59:43,896 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 00:59:43,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 00:59:43,897 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 00:59:43,899 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 00:59:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 00:59:45,042 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 00:59:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 00:59:46,362 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-26 00:59:46,362 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 00:59:46,364 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 00:59:46,414 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 00:59:46,566 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 00:59:46,570 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 00:59:46,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:59:46 BoogieIcfgContainer [2021-08-26 00:59:46,596 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 00:59:46,596 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 00:59:46,596 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 00:59:46,597 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 00:59:46,597 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:59:42" (3/4) ... [2021-08-26 00:59:46,598 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 00:59:46,638 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 00:59:46,638 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 00:59:46,640 INFO L168 Benchmark]: Toolchain (without parser) took 9640.71 ms. Allocated memory was 46.1 MB in the beginning and 58.7 MB in the end (delta: 12.6 MB). Free memory was 22.3 MB in the beginning and 31.5 MB in the end (delta: -9.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-08-26 00:59:46,640 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 46.1 MB. Free memory is still 28.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:59:46,640 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.49 ms. Allocated memory is still 58.7 MB. Free memory was 43.9 MB in the beginning and 42.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-26 00:59:46,641 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.76 ms. Allocated memory is still 58.7 MB. Free memory was 42.3 MB in the beginning and 40.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:59:46,641 INFO L168 Benchmark]: Boogie Preprocessor took 48.10 ms. Allocated memory is still 58.7 MB. Free memory was 40.5 MB in the beginning and 39.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:59:46,641 INFO L168 Benchmark]: RCFGBuilder took 4810.78 ms. Allocated memory is still 58.7 MB. Free memory was 39.1 MB in the beginning and 36.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. [2021-08-26 00:59:46,642 INFO L168 Benchmark]: TraceAbstraction took 4421.02 ms. Allocated memory is still 58.7 MB. Free memory was 36.4 MB in the beginning and 34.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.8 MB. Max. memory is 16.1 GB. [2021-08-26 00:59:46,642 INFO L168 Benchmark]: Witness Printer took 42.04 ms. Allocated memory is still 58.7 MB. Free memory was 34.0 MB in the beginning and 31.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 00:59:46,644 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 46.1 MB. Free memory is still 28.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 259.49 ms. Allocated memory is still 58.7 MB. Free memory was 43.9 MB in the beginning and 42.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.76 ms. Allocated memory is still 58.7 MB. Free memory was 42.3 MB in the beginning and 40.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.10 ms. Allocated memory is still 58.7 MB. Free memory was 40.5 MB in the beginning and 39.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 4810.78 ms. Allocated memory is still 58.7 MB. Free memory was 39.1 MB in the beginning and 36.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4421.02 ms. Allocated memory is still 58.7 MB. Free memory was 36.4 MB in the beginning and 34.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.8 MB. Max. memory is 16.1 GB. * Witness Printer took 42.04 ms. Allocated memory is still 58.7 MB. Free memory was 34.0 MB in the beginning and 31.5 MB in the end (delta: 2.5 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 - 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: 4353.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 6.8ms, AutomataDifference: 29.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms Time, 0.0ms 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, 0.0ms DumpTime, AutomataMinimizationStatistics: 10.8ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 45.4ms SsaConstructionTime, 2001.4ms SatisfiabilityAnalysisTime, 323.3ms 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! [2021-08-26 00:59:46,751 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...