./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 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer --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=/tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer --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 0.2.0-69874e2 [2020-12-01 15:41:33,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:41:33,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:41:33,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:41:33,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:41:33,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:41:33,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:41:33,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:41:33,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:41:33,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:41:33,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:41:33,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:41:33,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:41:33,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:41:33,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:41:33,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:41:33,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:41:33,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:41:33,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:41:33,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:41:33,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:41:33,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:41:33,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:41:33,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:41:33,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:41:33,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:41:33,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:41:33,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:41:33,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:41:33,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:41:33,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:41:33,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:41:33,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:41:33,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:41:33,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:41:33,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:41:33,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:41:33,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:41:33,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:41:33,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:41:33,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:41:33,796 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:41:33,838 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:41:33,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:41:33,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:41:33,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:41:33,842 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:41:33,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:41:33,843 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:41:33,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:41:33,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:41:33,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:41:33,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:41:33,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:41:33,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:41:33,843 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:41:33,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:41:33,844 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:41:33,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:41:33,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:41:33,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:41:33,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:41:33,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:41:33,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:41:33,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:41:33,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:41:33,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:41:33,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:41:33,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:41:33,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:41:33,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:41:33,847 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:/tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-12-01 15:41:34,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:41:34,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:41:34,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:41:34,133 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:41:34,134 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:41:34,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-12-01 15:41:34,204 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/data/13c7ea730/9761d59b566345e390501b8fdef13a91/FLAG66f6ec687 [2020-12-01 15:41:34,616 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:41:34,617 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-12-01 15:41:34,623 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/data/13c7ea730/9761d59b566345e390501b8fdef13a91/FLAG66f6ec687 [2020-12-01 15:41:35,016 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/data/13c7ea730/9761d59b566345e390501b8fdef13a91 [2020-12-01 15:41:35,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:41:35,020 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:41:35,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:41:35,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:41:35,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:41:35,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:41:35" (1/1) ... [2020-12-01 15:41:35,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bf58ebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:35, skipping insertion in model container [2020-12-01 15:41:35,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:41:35" (1/1) ... [2020-12-01 15:41:35,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:41:35,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:41:35,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:41:35,311 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:41:35,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:41:35,387 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:41:35,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:35 WrapperNode [2020-12-01 15:41:35,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:41:35,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:41:35,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:41:35,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:41:35,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:35" (1/1) ... [2020-12-01 15:41:35,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:35" (1/1) ... [2020-12-01 15:41:35,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:41:35,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:41:35,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:41:35,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:41:35,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:35" (1/1) ... [2020-12-01 15:41:35,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:35" (1/1) ... [2020-12-01 15:41:35,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:35" (1/1) ... [2020-12-01 15:41:35,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:35" (1/1) ... [2020-12-01 15:41:35,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:35" (1/1) ... [2020-12-01 15:41:35,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:35" (1/1) ... [2020-12-01 15:41:35,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:35" (1/1) ... [2020-12-01 15:41:35,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:41:35,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:41:35,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:41:35,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:41:35,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:41:35,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:41:35,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:41:35,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-01 15:41:35,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 15:41:35,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-01 15:41:35,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:41:35,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:41:35,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 15:41:35,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 15:41:35,823 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:41:35,823 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-01 15:41:35,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:41:35 BoogieIcfgContainer [2020-12-01 15:41:35,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:41:35,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:41:35,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:41:35,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:41:35,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:41:35" (1/3) ... [2020-12-01 15:41:35,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca0b841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:41:35, skipping insertion in model container [2020-12-01 15:41:35,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:35" (2/3) ... [2020-12-01 15:41:35,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca0b841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:41:35, skipping insertion in model container [2020-12-01 15:41:35,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:41:35" (3/3) ... [2020-12-01 15:41:35,834 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-12-01 15:41:35,848 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:41:35,850 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 15:41:35,861 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 15:41:35,883 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:41:35,884 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:41:35,884 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:41:35,884 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:41:35,884 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:41:35,884 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:41:35,885 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:41:35,885 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:41:35,897 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-01 15:41:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-01 15:41:35,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:41:35,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:41:35,903 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:41:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:41:35,908 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-12-01 15:41:35,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:41:35,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484606750] [2020-12-01 15:41:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:41:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:41:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:41:36,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484606750] [2020-12-01 15:41:36,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:41:36,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 15:41:36,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002001732] [2020-12-01 15:41:36,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 15:41:36,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:41:36,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 15:41:36,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 15:41:36,101 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-12-01 15:41:36,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:41:36,115 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-01 15:41:36,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 15:41:36,116 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-01 15:41:36,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:41:36,124 INFO L225 Difference]: With dead ends: 26 [2020-12-01 15:41:36,125 INFO L226 Difference]: Without dead ends: 10 [2020-12-01 15:41:36,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 15:41:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-01 15:41:36,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-01 15:41:36,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-01 15:41:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-01 15:41:36,212 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-12-01 15:41:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:41:36,217 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-01 15:41:36,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 15:41:36,217 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-01 15:41:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-01 15:41:36,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:41:36,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:41:36,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:41:36,219 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:41:36,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:41:36,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-12-01 15:41:36,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:41:36,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420331213] [2020-12-01 15:41:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:41:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:41:36,305 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:41:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:41:36,381 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:41:36,407 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:41:36,413 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:41:36,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 15:41:36,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:41:36 BoogieIcfgContainer [2020-12-01 15:41:36,456 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:41:36,457 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:41:36,457 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:41:36,457 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:41:36,458 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:41:35" (3/4) ... [2020-12-01 15:41:36,461 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-01 15:41:36,461 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:41:36,466 INFO L168 Benchmark]: Toolchain (without parser) took 1442.18 ms. Allocated memory is still 98.6 MB. Free memory was 62.8 MB in the beginning and 66.9 MB in the end (delta: -4.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:41:36,467 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory is still 79.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:41:36,468 INFO L168 Benchmark]: CACSL2BoogieTranslator took 367.88 ms. Allocated memory is still 98.6 MB. Free memory was 62.5 MB in the beginning and 74.5 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:41:36,470 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.73 ms. Allocated memory is still 98.6 MB. Free memory was 74.5 MB in the beginning and 72.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:41:36,471 INFO L168 Benchmark]: Boogie Preprocessor took 29.84 ms. Allocated memory is still 98.6 MB. Free memory was 72.6 MB in the beginning and 71.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:41:36,472 INFO L168 Benchmark]: RCFGBuilder took 350.63 ms. Allocated memory is still 98.6 MB. Free memory was 71.4 MB in the beginning and 56.1 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-01 15:41:36,473 INFO L168 Benchmark]: TraceAbstraction took 629.08 ms. Allocated memory is still 98.6 MB. Free memory was 55.6 MB in the beginning and 67.3 MB in the end (delta: -11.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:41:36,475 INFO L168 Benchmark]: Witness Printer took 4.97 ms. Allocated memory is still 98.6 MB. Free memory was 67.3 MB in the beginning and 66.9 MB in the end (delta: 456.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:41:36,486 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory is still 79.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 367.88 ms. Allocated memory is still 98.6 MB. Free memory was 62.5 MB in the beginning and 74.5 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.73 ms. Allocated memory is still 98.6 MB. Free memory was 74.5 MB in the beginning and 72.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.84 ms. Allocated memory is still 98.6 MB. Free memory was 72.6 MB in the beginning and 71.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 350.63 ms. Allocated memory is still 98.6 MB. Free memory was 71.4 MB in the beginning and 56.1 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 629.08 ms. Allocated memory is still 98.6 MB. Free memory was 55.6 MB in the beginning and 67.3 MB in the end (delta: -11.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.97 ms. Allocated memory is still 98.6 MB. Free memory was 67.3 MB in the beginning and 66.9 MB in the end (delta: 456.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() 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] [L3] __assert_fail("0", "sqrt_poly2.c", 3, "reach_error") VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 64 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-69874e2 [2020-12-01 15:41:38,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:41:38,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:41:39,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:41:39,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:41:39,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:41:39,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:41:39,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:41:39,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:41:39,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:41:39,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:41:39,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:41:39,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:41:39,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:41:39,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:41:39,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:41:39,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:41:39,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:41:39,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:41:39,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:41:39,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:41:39,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:41:39,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:41:39,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:41:39,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:41:39,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:41:39,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:41:39,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:41:39,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:41:39,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:41:39,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:41:39,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:41:39,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:41:39,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:41:39,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:41:39,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:41:39,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:41:39,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:41:39,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:41:39,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:41:39,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:41:39,052 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-01 15:41:39,076 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:41:39,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:41:39,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:41:39,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:41:39,079 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:41:39,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:41:39,080 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:41:39,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:41:39,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:41:39,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:41:39,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:41:39,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:41:39,082 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-01 15:41:39,082 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-01 15:41:39,083 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:41:39,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:41:39,083 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:41:39,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:41:39,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:41:39,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:41:39,084 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:41:39,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:41:39,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:41:39,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:41:39,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:41:39,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:41:39,086 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-01 15:41:39,087 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-01 15:41:39,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:41:39,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:41:39,087 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-01 15:41:39,088 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:/tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-12-01 15:41:39,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:41:39,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:41:39,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:41:39,487 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:41:39,488 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:41:39,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-12-01 15:41:39,583 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/data/25cba33a8/2efb1a4a7c3d4b1c8d3fdf0f1ad9d8b7/FLAG306332e48 [2020-12-01 15:41:40,167 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:41:40,168 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-12-01 15:41:40,177 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/data/25cba33a8/2efb1a4a7c3d4b1c8d3fdf0f1ad9d8b7/FLAG306332e48 [2020-12-01 15:41:40,521 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/data/25cba33a8/2efb1a4a7c3d4b1c8d3fdf0f1ad9d8b7 [2020-12-01 15:41:40,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:41:40,525 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:41:40,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:41:40,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:41:40,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:41:40,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:41:40" (1/1) ... [2020-12-01 15:41:40,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f0a9f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:40, skipping insertion in model container [2020-12-01 15:41:40,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:41:40" (1/1) ... [2020-12-01 15:41:40,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:41:40,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:41:40,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:41:40,785 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:41:40,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:41:40,903 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:41:40,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:40 WrapperNode [2020-12-01 15:41:40,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:41:40,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:41:40,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:41:40,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:41:40,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:40" (1/1) ... [2020-12-01 15:41:40,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:40" (1/1) ... [2020-12-01 15:41:40,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:41:40,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:41:40,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:41:40,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:41:40,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:40" (1/1) ... [2020-12-01 15:41:40,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:40" (1/1) ... [2020-12-01 15:41:40,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:40" (1/1) ... [2020-12-01 15:41:40,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:40" (1/1) ... [2020-12-01 15:41:41,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:40" (1/1) ... [2020-12-01 15:41:41,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:40" (1/1) ... [2020-12-01 15:41:41,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:40" (1/1) ... [2020-12-01 15:41:41,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:41:41,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:41:41,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:41:41,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:41:41,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:41:41,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-12-01 15:41:41,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-12-01 15:41:41,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-01 15:41:41,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:41:41,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-01 15:41:41,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:41:41,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:41:41,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 15:41:41,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-01 15:41:47,777 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:41:47,777 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-01 15:41:47,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:41:47 BoogieIcfgContainer [2020-12-01 15:41:47,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:41:47,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:41:47,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:41:47,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:41:47,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:41:40" (1/3) ... [2020-12-01 15:41:47,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34021cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:41:47, skipping insertion in model container [2020-12-01 15:41:47,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:41:40" (2/3) ... [2020-12-01 15:41:47,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34021cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:41:47, skipping insertion in model container [2020-12-01 15:41:47,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:41:47" (3/3) ... [2020-12-01 15:41:47,787 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-12-01 15:41:47,800 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:41:47,804 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 15:41:47,815 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 15:41:47,838 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:41:47,838 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:41:47,838 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:41:47,838 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:41:47,838 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:41:47,839 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:41:47,839 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:41:47,839 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:41:47,850 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-01 15:41:47,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-01 15:41:47,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:41:47,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:41:47,856 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:41:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:41:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-12-01 15:41:47,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-01 15:41:47,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904647997] [2020-12-01 15:41:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-01 15:41:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:41:49,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-01 15:41:49,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:41:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:41:49,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-01 15:41:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:41:49,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904647997] [2020-12-01 15:41:49,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:41:49,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-01 15:41:49,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604808744] [2020-12-01 15:41:49,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 15:41:49,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-01 15:41:49,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 15:41:49,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 15:41:49,430 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-12-01 15:41:49,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:41:49,452 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-01 15:41:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 15:41:49,454 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-01 15:41:49,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:41:49,466 INFO L225 Difference]: With dead ends: 26 [2020-12-01 15:41:49,466 INFO L226 Difference]: Without dead ends: 10 [2020-12-01 15:41:49,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 15:41:49,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-01 15:41:49,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-01 15:41:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-01 15:41:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-01 15:41:49,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-12-01 15:41:49,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:41:49,500 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-01 15:41:49,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 15:41:49,500 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-01 15:41:49,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-01 15:41:49,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:41:49,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:41:49,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-01 15:41:49,713 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:41:49,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:41:49,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-12-01 15:41:49,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-01 15:41:49,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843352810] [2020-12-01 15:41:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-01 15:41:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:41:51,349 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:41:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:41:52,977 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:41:53,114 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-01 15:41:53,117 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:41:53,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-01 15:41:53,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:41:53 BoogieIcfgContainer [2020-12-01 15:41:53,355 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:41:53,356 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:41:53,356 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:41:53,356 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:41:53,362 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:41:47" (3/4) ... [2020-12-01 15:41:53,364 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:41:53,448 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_80099b17-4c20-4cb5-b79e-219ea75a783c/bin/uautomizer/witness.graphml [2020-12-01 15:41:53,454 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:41:53,457 INFO L168 Benchmark]: Toolchain (without parser) took 12930.72 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 29.9 MB in the beginning and 37.0 MB in the end (delta: -7.1 MB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. [2020-12-01 15:41:53,461 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 52.4 MB. Free memory was 35.1 MB in the beginning and 35.1 MB in the end (delta: 39.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:41:53,462 INFO L168 Benchmark]: CACSL2BoogieTranslator took 374.73 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 29.7 MB in the beginning and 47.6 MB in the end (delta: -17.9 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2020-12-01 15:41:53,463 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.60 ms. Allocated memory is still 65.0 MB. Free memory was 47.6 MB in the beginning and 45.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:41:53,464 INFO L168 Benchmark]: Boogie Preprocessor took 46.34 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 44.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:41:53,465 INFO L168 Benchmark]: RCFGBuilder took 6757.99 ms. Allocated memory is still 65.0 MB. Free memory was 44.3 MB in the beginning and 44.0 MB in the end (delta: 237.1 kB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. [2020-12-01 15:41:53,466 INFO L168 Benchmark]: TraceAbstraction took 5574.42 ms. Allocated memory is still 65.0 MB. Free memory was 43.6 MB in the beginning and 39.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-12-01 15:41:53,467 INFO L168 Benchmark]: Witness Printer took 99.51 ms. Allocated memory is still 65.0 MB. Free memory was 39.5 MB in the beginning and 37.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:41:53,471 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 52.4 MB. Free memory was 35.1 MB in the beginning and 35.1 MB in the end (delta: 39.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 374.73 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 29.7 MB in the beginning and 47.6 MB in the end (delta: -17.9 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.60 ms. Allocated memory is still 65.0 MB. Free memory was 47.6 MB in the beginning and 45.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.34 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 44.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 6757.99 ms. Allocated memory is still 65.0 MB. Free memory was 44.3 MB in the beginning and 44.0 MB in the end (delta: 237.1 kB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5574.42 ms. Allocated memory is still 65.0 MB. Free memory was 43.6 MB in the beginning and 39.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Witness Printer took 99.51 ms. Allocated memory is still 65.0 MB. Free memory was 39.5 MB in the beginning and 37.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] [L3] __assert_fail("0", "sqrt_poly2.c", 3, "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, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 128 SizeOfPredicates, 0 NumberOfNonLiveVariables, 58 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! Received shutdown request...