/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/float-benchs/sqrt_poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:44:33,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:44:33,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:44:33,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:44:33,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:44:33,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:44:33,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:44:33,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:44:33,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:44:33,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:44:33,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:44:33,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:44:33,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:44:33,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:44:33,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:44:33,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:44:33,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:44:33,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:44:33,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:44:33,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:44:33,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:44:33,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:44:33,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:44:33,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:44:33,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:44:33,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:44:33,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:44:33,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:44:33,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:44:33,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:44:33,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:44:33,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:44:33,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:44:33,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:44:33,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:44:33,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:44:33,833 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:44:33,868 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:44:33,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:44:33,869 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:44:33,869 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:44:33,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:44:33,870 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:44:33,870 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:44:33,870 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:44:33,870 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:44:33,870 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:44:33,871 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:44:33,871 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:44:33,872 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:44:33,872 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:44:33,872 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:44:33,872 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:44:33,873 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:44:33,873 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:44:33,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:44:33,874 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:44:33,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:44:33,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:44:33,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:44:33,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:44:33,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:44:33,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:44:33,875 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:44:33,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:44:33,875 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:44:33,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:44:33,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:44:33,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:44:33,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:44:33,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:44:33,877 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:44:33,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:44:33,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:44:33,877 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:44:33,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:44:33,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:44:33,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:44:33,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:44:34,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:44:34,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:44:34,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:44:34,146 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:44:34,148 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:44:34,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2023-04-01 04:44:35,347 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:44:35,503 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:44:35,504 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2023-04-01 04:44:35,509 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/954df7896/2268a6c8abe646eda5e87e29eaa13fb1/FLAG7e05c5777 [2023-04-01 04:44:35,521 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/954df7896/2268a6c8abe646eda5e87e29eaa13fb1 [2023-04-01 04:44:35,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:44:35,526 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:44:35,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:44:35,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:44:35,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:44:35,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:44:35" (1/1) ... [2023-04-01 04:44:35,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69ac6639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:35, skipping insertion in model container [2023-04-01 04:44:35,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:44:35" (1/1) ... [2023-04-01 04:44:35,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:44:35,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:44:35,665 WARN L247 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] [2023-04-01 04:44:35,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:44:35,691 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:44:35,700 WARN L247 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] [2023-04-01 04:44:35,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:44:35,721 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:44:35,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:35 WrapperNode [2023-04-01 04:44:35,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:44:35,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:44:35,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:44:35,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:44:35,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:35" (1/1) ... [2023-04-01 04:44:35,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:35" (1/1) ... [2023-04-01 04:44:35,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:35" (1/1) ... [2023-04-01 04:44:35,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:35" (1/1) ... [2023-04-01 04:44:35,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:35" (1/1) ... [2023-04-01 04:44:35,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:35" (1/1) ... [2023-04-01 04:44:35,753 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:35" (1/1) ... [2023-04-01 04:44:35,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:35" (1/1) ... [2023-04-01 04:44:35,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:44:35,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:44:35,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:44:35,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:44:35,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:35" (1/1) ... [2023-04-01 04:44:35,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:44:35,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:44:35,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:44:35,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:44:35,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:44:35,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:44:35,824 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:44:35,824 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 04:44:35,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 04:44:35,824 INFO L138 BoogieDeclarations]: Found implementation of procedure sqrt_custom [2023-04-01 04:44:35,824 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:44:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:44:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:44:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:44:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:44:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2023-04-01 04:44:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 04:44:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 04:44:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure sqrt_custom [2023-04-01 04:44:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 04:44:35,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-04-01 04:44:35,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:44:35,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:44:35,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-04-01 04:44:35,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:44:35,826 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:44:35,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:44:35,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:44:35,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:44:35,889 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:44:35,891 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:44:36,124 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:44:36,281 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:44:36,281 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 04:44:36,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:44:36 BoogieIcfgContainer [2023-04-01 04:44:36,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:44:36,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:44:36,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:44:36,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:44:36,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:44:35" (1/3) ... [2023-04-01 04:44:36,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184ba7d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:44:36, skipping insertion in model container [2023-04-01 04:44:36,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:35" (2/3) ... [2023-04-01 04:44:36,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184ba7d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:44:36, skipping insertion in model container [2023-04-01 04:44:36,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:44:36" (3/3) ... [2023-04-01 04:44:36,291 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2023-04-01 04:44:36,306 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:44:36,306 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:44:36,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:44:36,349 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f3df96d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:44:36,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:44:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:44:36,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 04:44:36,360 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:44:36,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:44:36,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:44:36,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:44:36,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1402210496, now seen corresponding path program 1 times [2023-04-01 04:44:36,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:44:36,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201824009] [2023-04-01 04:44:36,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:44:36,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:44:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 04:44:36,560 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 04:44:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 04:44:36,645 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 04:44:36,647 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 04:44:36,648 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 04:44:36,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:44:36,655 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-04-01 04:44:36,659 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 04:44:36,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 04:44:36 BoogieIcfgContainer [2023-04-01 04:44:36,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 04:44:36,681 INFO L158 Benchmark]: Toolchain (without parser) took 1155.47ms. Allocated memory is still 257.9MB. Free memory was 209.1MB in the beginning and 209.8MB in the end (delta: -772.3kB). Peak memory consumption was 798.5kB. Max. memory is 8.0GB. [2023-04-01 04:44:36,682 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 183.5MB. Free memory is still 131.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 04:44:36,682 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.54ms. Allocated memory is still 257.9MB. Free memory was 208.7MB in the beginning and 197.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 04:44:36,683 INFO L158 Benchmark]: Boogie Preprocessor took 33.21ms. Allocated memory is still 257.9MB. Free memory was 197.8MB in the beginning and 196.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 04:44:36,683 INFO L158 Benchmark]: RCFGBuilder took 526.93ms. Allocated memory is still 257.9MB. Free memory was 196.1MB in the beginning and 170.6MB in the end (delta: 25.5MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2023-04-01 04:44:36,683 INFO L158 Benchmark]: TraceAbstraction took 394.46ms. Allocated memory is still 257.9MB. Free memory was 169.9MB in the beginning and 209.8MB in the end (delta: -39.9MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 04:44:36,689 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 183.5MB. Free memory is still 131.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 192.54ms. Allocated memory is still 257.9MB. Free memory was 208.7MB in the beginning and 197.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.21ms. Allocated memory is still 257.9MB. Free memory was 197.8MB in the beginning and 196.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 526.93ms. Allocated memory is still 257.9MB. Free memory was 196.1MB in the beginning and 170.6MB in the end (delta: 25.5MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * TraceAbstraction took 394.46ms. Allocated memory is still 257.9MB. Free memory was 169.9MB in the beginning and 209.8MB in the end (delta: -39.9MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 bitwiseAnd at line 37, overapproximation of someBinaryArithmeticDOUBLEoperation at line 39, 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; [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L61] CALL assume_abort_if_not(x >= 1. && x <= 1e10) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, \old(cond)=1] [L12] COND FALSE !(!cond) [L61] RET assume_abort_if_not(x >= 1. && x <= 1e10) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, x=1072693253] [L63] CALL, EXPR sqrt_custom(x) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, \old(a)=1072693253] [L31] union u x; [L32] double r; [L33] int exp; [L35] x.d = a [L37] EXPR x.i[0] [L37] EXPR x.i[0] & 0x7FF00000 [L37] exp = (x.i[0] & 0x7FF00000) >> 20 [L38] EXPR x.i[0] [L38] EXPR x.i[0] & 0x800FFFFF [L38] EXPR (x.i[0] & 0x800FFFFF) | 0x3FF00000 [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 [L43] COND TRUE exp % 2 == 0 [L44] exp++ [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] r = r * x.d [L53] return r; [L53] return r; [L63] RET, EXPR sqrt_custom(x) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, sqrt_custom(x)=1072693251, x=1072693253] [L63] y = sqrt_custom(x) [L65] CALL __VERIFIER_assert(y >= 0. && y <= 1e6) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, \old(cond)=0] [L14] COND TRUE !(cond) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, \old(cond)=0, cond=0] [L14] reach_error() VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, \old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 [2023-04-01 04:44:36,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...