/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_Newton_pseudoconstant.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:20:38,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:20:38,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:20:38,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:20:38,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:20:38,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:20:38,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:20:38,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:20:38,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:20:38,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:20:38,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:20:38,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:20:38,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:20:38,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:20:38,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:20:38,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:20:38,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:20:38,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:20:38,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:20:38,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:20:38,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:20:38,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:20:38,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:20:38,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:20:38,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 21:20:38,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 21:20:38,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 21:20:38,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 21:20:38,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 21:20:38,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 21:20:38,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 21:20:38,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 21:20:38,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 21:20:38,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 21:20:38,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 21:20:38,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 21:20:38,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 21:20:38,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 21:20:38,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:20:38,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:20:38,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:20:38,656 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 [2023-04-02 21:20:38,669 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:20:38,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:20:38,670 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:20:38,670 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:20:38,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:20:38,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:20:38,670 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:20:38,670 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:20:38,670 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:20:38,671 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:20:38,671 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:20:38,671 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:20:38,671 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:20:38,671 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:20:38,671 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:20:38,671 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:20:38,671 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:20:38,671 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:20:38,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:20:38,672 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:20:38,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:20:38,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:20:38,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:20:38,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:20:38,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:20:38,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:20:38,673 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:20:38,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:20:38,673 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:20:38,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:20:38,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:20:38,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:20:38,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:20:38,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:20:38,674 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:20:38,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:20:38,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:20:38,675 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:20:38,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:20:38,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:20:38,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:20:38,675 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:20:38,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:20:38,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:20:38,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:20:38,850 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:20:38,850 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:20:38,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c [2023-04-02 21:20:39,866 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:20:40,002 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:20:40,002 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_Newton_pseudoconstant.c [2023-04-02 21:20:40,006 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a39e1f36/59615418836d4b2cbee5a003b2b63e3c/FLAG32d32ba87 [2023-04-02 21:20:40,016 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a39e1f36/59615418836d4b2cbee5a003b2b63e3c [2023-04-02 21:20:40,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:20:40,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:20:40,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:20:40,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:20:40,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:20:40,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:20:40" (1/1) ... [2023-04-02 21:20:40,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21cb6934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:40, skipping insertion in model container [2023-04-02 21:20:40,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:20:40" (1/1) ... [2023-04-02 21:20:40,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:20:40,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:20:40,134 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_Newton_pseudoconstant.c[557,570] [2023-04-02 21:20:40,154 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:20:40,161 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:20:40,170 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_Newton_pseudoconstant.c[557,570] [2023-04-02 21:20:40,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:20:40,187 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:20:40,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:40 WrapperNode [2023-04-02 21:20:40,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:20:40,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:20:40,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:20:40,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:20:40,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:40" (1/1) ... [2023-04-02 21:20:40,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:40" (1/1) ... [2023-04-02 21:20:40,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:40" (1/1) ... [2023-04-02 21:20:40,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:40" (1/1) ... [2023-04-02 21:20:40,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:40" (1/1) ... [2023-04-02 21:20:40,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:40" (1/1) ... [2023-04-02 21:20:40,206 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:40" (1/1) ... [2023-04-02 21:20:40,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:40" (1/1) ... [2023-04-02 21:20:40,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:20:40,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:20:40,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:20:40,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:20:40,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:40" (1/1) ... [2023-04-02 21:20:40,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:20:40,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:20:40,230 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) [2023-04-02 21:20:40,235 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 [2023-04-02 21:20:40,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:20:40,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:20:40,260 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:20:40,261 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 21:20:40,261 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 21:20:40,261 INFO L138 BoogieDeclarations]: Found implementation of procedure SqrtR [2023-04-02 21:20:40,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:20:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:20:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:20:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:20:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:20:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2023-04-02 21:20:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 21:20:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 21:20:40,261 INFO L130 BoogieDeclarations]: Found specification of procedure SqrtR [2023-04-02 21:20:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:20:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:20:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:20:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:20:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:20:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:20:40,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:20:40,309 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:20:40,311 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:20:40,451 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:20:40,491 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:20:40,492 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 21:20:40,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:20:40 BoogieIcfgContainer [2023-04-02 21:20:40,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:20:40,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:20:40,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:20:40,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:20:40,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:20:40" (1/3) ... [2023-04-02 21:20:40,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ad479c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:20:40, skipping insertion in model container [2023-04-02 21:20:40,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:20:40" (2/3) ... [2023-04-02 21:20:40,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ad479c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:20:40, skipping insertion in model container [2023-04-02 21:20:40,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:20:40" (3/3) ... [2023-04-02 21:20:40,508 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt_Newton_pseudoconstant.c [2023-04-02 21:20:40,520 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:20:40,520 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:20:40,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:20:40,573 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;@2e80bbab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:20:40,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:20:40,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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) [2023-04-02 21:20:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 21:20:40,581 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:20:40,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:20:40,582 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:40,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:40,585 INFO L85 PathProgramCache]: Analyzing trace with hash 782405029, now seen corresponding path program 1 times [2023-04-02 21:20:40,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:40,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902801002] [2023-04-02 21:20:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:40,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 21:20:40,672 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 21:20:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 21:20:40,714 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-02 21:20:40,715 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 21:20:40,716 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 21:20:40,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:20:40,723 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-04-02 21:20:40,725 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 21:20:40,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 09:20:40 BoogieIcfgContainer [2023-04-02 21:20:40,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 21:20:40,749 INFO L158 Benchmark]: Toolchain (without parser) took 729.94ms. Allocated memory is still 275.8MB. Free memory was 236.4MB in the beginning and 194.9MB in the end (delta: 41.5MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. [2023-04-02 21:20:40,749 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 187.7MB. Free memory is still 134.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 21:20:40,750 INFO L158 Benchmark]: CACSL2BoogieTranslator took 167.50ms. Allocated memory is still 275.8MB. Free memory was 236.4MB in the beginning and 225.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 21:20:40,751 INFO L158 Benchmark]: Boogie Preprocessor took 19.74ms. Allocated memory is still 275.8MB. Free memory was 225.8MB in the beginning and 223.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 21:20:40,751 INFO L158 Benchmark]: RCFGBuilder took 285.44ms. Allocated memory is still 275.8MB. Free memory was 223.8MB in the beginning and 210.2MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-04-02 21:20:40,755 INFO L158 Benchmark]: TraceAbstraction took 244.96ms. Allocated memory is still 275.8MB. Free memory was 209.6MB in the beginning and 194.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-04-02 21:20:40,757 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 187.7MB. Free memory is still 134.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 167.50ms. Allocated memory is still 275.8MB. Free memory was 236.4MB in the beginning and 225.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.74ms. Allocated memory is still 275.8MB. Free memory was 225.8MB in the beginning and 223.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 285.44ms. Allocated memory is still 275.8MB. Free memory was 223.8MB in the beginning and 210.2MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 244.96ms. Allocated memory is still 275.8MB. Free memory was 209.6MB in the beginning and 194.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. 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: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 52, overapproximation of someBinaryArithmeticDOUBLEoperation at line 37, overapproximation of someUnaryDOUBLEoperation at line 25. Possible FailurePath: [L15] double _EPS = 1e-6; [L42] double d, dd, r; [L43] double epsilon = 1e-8; [L45] d = 1. VAL [_EPS=1/1000000, d=1, epsilon=1/100000000] [L45] COND TRUE d <= 20. [L47] dd = __VERIFIER_nondet_double() [L48] CALL assume_abort_if_not(dd >= d-epsilon && dd <= d+epsilon) VAL [\old(cond)=1, _EPS=1/1000000] [L11] COND FALSE !(!cond) [L48] RET assume_abort_if_not(dd >= d-epsilon && dd <= d+epsilon) VAL [_EPS=1/1000000, d=1, epsilon=1/100000000] [L50] CALL, EXPR SqrtR(dd) VAL [\old(Input)=53, _EPS=1/1000000] [L19] double xn, xnp1, residu, lsup, linf; [L20] int i, cond; [L21] COND FALSE !(Input <= 1.0) [L21] xn = 1.0/Input [L22] xnp1 = xn [L23] residu = 2.0*_EPS*(xn+xnp1) [L24] lsup = _EPS * (xn+xnp1) [L25] linf = -lsup [L26] cond = ((residu > lsup) || (residu < linf)) [L27] i = 0 VAL [Input=53, \old(Input)=53, _EPS=1/1000000, cond=0, i=0, xn=1, xn=1] [L28] COND FALSE !(\read(cond)) [L37] return 1.0 / xnp1; [L50] RET, EXPR SqrtR(dd) VAL [SqrtR(dd)=52, _EPS=1/1000000, d=1, d=53, epsilon=1/100000000] [L50] r = SqrtR(dd) [L52] CALL __VERIFIER_assert(r >= 0.9 && r <= 5.) VAL [\old(cond)=0, _EPS=1/1000000] [L13] COND TRUE !(cond) VAL [\old(cond)=0, _EPS=1/1000000, cond=0] [L13] reach_error() VAL [\old(cond)=0, _EPS=1/1000000, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, 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=25occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 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 [2023-04-02 21:20:40,785 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...