/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 IntervalDomain -i ../sv-benchmarks/c/float-benchs/sqrt_poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:44:17,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:44:17,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:44:17,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:44:17,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:44:17,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:44:17,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:44:17,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:44:17,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:44:17,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:44:17,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:44:17,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:44:17,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:44:17,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:44:17,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:44:17,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:44:17,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:44:17,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:44:17,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:44:17,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:44:17,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:44:17,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:44:17,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:44:17,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:44:17,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:44:17,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:44:17,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:44:17,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:44:17,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:44:17,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:44:17,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:44:17,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:44:17,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:44:17,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:44:17,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:44:17,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:44:17,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:44:17,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:44:17,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:44:17,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:44:17,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:44:17,831 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 [2023-03-31 22:44:17,856 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:44:17,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:44:17,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:44:17,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:44:17,857 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:44:17,857 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:44:17,857 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:44:17,858 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:44:17,858 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:44:17,858 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:44:17,858 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:44:17,858 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:44:17,858 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:44:17,858 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:44:17,859 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:44:17,859 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:44:17,859 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:44:17,859 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:44:17,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:44:17,859 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:44:17,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:44:17,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:44:17,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:44:17,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:44:17,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:44:17,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:44:17,860 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:44:17,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:44:17,860 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:44:17,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:44:17,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:44:17,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:44:17,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:44:17,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:44:17,861 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:44:17,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:44:17,861 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:44:17,861 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:44:17,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:44:17,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:44:17,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:44:17,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:44:18,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:44:18,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:44:18,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:44:18,055 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:44:18,055 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:44:18,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2023-03-31 22:44:19,014 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:44:19,191 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:44:19,191 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2023-03-31 22:44:19,195 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82bbc69b1/6130c67ddeaa43d39608179c1b328e5d/FLAGf830c9c85 [2023-03-31 22:44:19,209 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82bbc69b1/6130c67ddeaa43d39608179c1b328e5d [2023-03-31 22:44:19,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:44:19,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:44:19,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:44:19,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:44:19,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:44:19,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:44:19" (1/1) ... [2023-03-31 22:44:19,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b98754c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:44:19, skipping insertion in model container [2023-03-31 22:44:19,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:44:19" (1/1) ... [2023-03-31 22:44:19,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:44:19,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:44:19,364 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] [2023-03-31 22:44:19,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:44:19,401 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:44:19,413 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] [2023-03-31 22:44:19,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:44:19,444 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:44:19,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:44:19 WrapperNode [2023-03-31 22:44:19,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:44:19,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:44:19,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:44:19,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:44:19,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:44:19" (1/1) ... [2023-03-31 22:44:19,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:44:19" (1/1) ... [2023-03-31 22:44:19,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:44:19" (1/1) ... [2023-03-31 22:44:19,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:44:19" (1/1) ... [2023-03-31 22:44:19,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:44:19" (1/1) ... [2023-03-31 22:44:19,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:44:19" (1/1) ... [2023-03-31 22:44:19,481 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:44:19" (1/1) ... [2023-03-31 22:44:19,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:44:19" (1/1) ... [2023-03-31 22:44:19,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:44:19,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:44:19,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:44:19,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:44:19,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:44:19" (1/1) ... [2023-03-31 22:44:19,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:44:19,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:44:19,544 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) [2023-03-31 22:44:19,562 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 [2023-03-31 22:44:19,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:44:19,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:44:19,573 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:44:19,573 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 22:44:19,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 22:44:19,574 INFO L138 BoogieDeclarations]: Found implementation of procedure sqrt_custom [2023-03-31 22:44:19,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:44:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:44:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:44:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:44:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:44:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2023-03-31 22:44:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 22:44:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 22:44:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure sqrt_custom [2023-03-31 22:44:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 22:44:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-03-31 22:44:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:44:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:44:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-03-31 22:44:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:44:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:44:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:44:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:44:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:44:19,644 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:44:19,646 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:44:19,832 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:44:19,951 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:44:19,951 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-03-31 22:44:19,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:44:19 BoogieIcfgContainer [2023-03-31 22:44:19,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:44:19,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:44:19,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:44:19,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:44:19,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:44:19" (1/3) ... [2023-03-31 22:44:19,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744f3f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:44:19, skipping insertion in model container [2023-03-31 22:44:19,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:44:19" (2/3) ... [2023-03-31 22:44:19,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744f3f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:44:19, skipping insertion in model container [2023-03-31 22:44:19,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:44:19" (3/3) ... [2023-03-31 22:44:19,963 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2023-03-31 22:44:19,974 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:44:19,974 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:44:20,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:44:20,034 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;@7c4dff16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:44:20,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:44:20,038 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) [2023-03-31 22:44:20,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 22:44:20,043 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:44:20,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:44:20,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:44:20,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:44:20,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1402210496, now seen corresponding path program 1 times [2023-03-31 22:44:20,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:44:20,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116446216] [2023-03-31 22:44:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:44:20,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:44:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 22:44:20,253 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-31 22:44:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 22:44:20,326 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-03-31 22:44:20,327 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-31 22:44:20,328 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 22:44:20,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:44:20,332 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-03-31 22:44:20,336 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 22:44:20,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 10:44:20 BoogieIcfgContainer [2023-03-31 22:44:20,357 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 22:44:20,357 INFO L158 Benchmark]: Toolchain (without parser) took 1145.47ms. Allocated memory is still 228.6MB. Free memory was 196.5MB in the beginning and 136.0MB in the end (delta: 60.4MB). Peak memory consumption was 60.8MB. Max. memory is 8.0GB. [2023-03-31 22:44:20,357 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 228.6MB. Free memory was 181.9MB in the beginning and 181.8MB in the end (delta: 134.3kB). There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 22:44:20,358 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.43ms. Allocated memory is still 228.6MB. Free memory was 196.1MB in the beginning and 185.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-03-31 22:44:20,358 INFO L158 Benchmark]: Boogie Preprocessor took 37.62ms. Allocated memory is still 228.6MB. Free memory was 185.0MB in the beginning and 183.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-03-31 22:44:20,359 INFO L158 Benchmark]: RCFGBuilder took 469.89ms. Allocated memory is still 228.6MB. Free memory was 183.2MB in the beginning and 157.7MB in the end (delta: 25.5MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2023-03-31 22:44:20,359 INFO L158 Benchmark]: TraceAbstraction took 401.63ms. Allocated memory is still 228.6MB. Free memory was 157.3MB in the beginning and 136.0MB in the end (delta: 21.3MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2023-03-31 22:44:20,361 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 228.6MB. Free memory was 181.9MB in the beginning and 181.8MB in the end (delta: 134.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 230.43ms. Allocated memory is still 228.6MB. Free memory was 196.1MB in the beginning and 185.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.62ms. Allocated memory is still 228.6MB. Free memory was 185.0MB in the beginning and 183.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 469.89ms. Allocated memory is still 228.6MB. Free memory was 183.2MB in the beginning and 157.7MB in the end (delta: 25.5MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * TraceAbstraction took 401.63ms. Allocated memory is still 228.6MB. Free memory was 157.3MB in the beginning and 136.0MB in the end (delta: 21.3MB). Peak memory consumption was 21.0MB. 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 [2023-03-31 22:44:20,390 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...