/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:08:59,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:08:59,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:08:59,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:08:59,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:08:59,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:08:59,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:08:59,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:08:59,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:08:59,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:08:59,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:08:59,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:08:59,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:08:59,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:08:59,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:08:59,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:08:59,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:08:59,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:08:59,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:08:59,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:08:59,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:08:59,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:08:59,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:08:59,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:08:59,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:08:59,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:08:59,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:08:59,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:08:59,770 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:08:59,793 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:08:59,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:08:59,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:08:59,798 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:08:59,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:08:59,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:08:59,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:08:59,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:08:59,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:08:59,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:08:59,800 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:08:59,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:08:59,800 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:08:59,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:08:59,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:08:59,801 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:08:59,801 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:08:59,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:08:59,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:08:59,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:08:59,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:08:59,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:08:59,802 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:09:00,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:09:00,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:09:00,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:09:00,216 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:09:00,217 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:09:00,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2021-02-21 20:09:00,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/301ec499b/01b0620812854bb3879b14557ed67120/FLAGbca52fd82 [2021-02-21 20:09:01,003 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:09:01,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2021-02-21 20:09:01,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/301ec499b/01b0620812854bb3879b14557ed67120/FLAGbca52fd82 [2021-02-21 20:09:01,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/301ec499b/01b0620812854bb3879b14557ed67120 [2021-02-21 20:09:01,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:09:01,362 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:09:01,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:09:01,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:09:01,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:09:01,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:09:01" (1/1) ... [2021-02-21 20:09:01,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d76e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:09:01, skipping insertion in model container [2021-02-21 20:09:01,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:09:01" (1/1) ... [2021-02-21 20:09:01,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:09:01,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:09:01,546 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c[587,600] [2021-02-21 20:09:01,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:09:01,580 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:09:01,594 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c[587,600] [2021-02-21 20:09:01,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:09:01,624 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:09:01,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:09:01 WrapperNode [2021-02-21 20:09:01,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:09:01,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:09:01,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:09:01,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:09:01,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:09:01" (1/1) ... [2021-02-21 20:09:01,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:09:01" (1/1) ... [2021-02-21 20:09:01,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:09:01" (1/1) ... [2021-02-21 20:09:01,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:09:01" (1/1) ... [2021-02-21 20:09:01,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:09:01" (1/1) ... [2021-02-21 20:09:01,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:09:01" (1/1) ... [2021-02-21 20:09:01,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:09:01" (1/1) ... [2021-02-21 20:09:01,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:09:01,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:09:01,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:09:01,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:09:01,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:09:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:09:01,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:09:01,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:09:01,766 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:09:01,767 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 20:09:01,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 20:09:01,767 INFO L138 BoogieDeclarations]: Found implementation of procedure sqrt_custom [2021-02-21 20:09:01,767 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:09:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:09:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:09:01,767 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:09:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:09:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2021-02-21 20:09:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 20:09:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 20:09:01,768 INFO L130 BoogieDeclarations]: Found specification of procedure sqrt_custom [2021-02-21 20:09:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-21 20:09:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:09:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:09:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-21 20:09:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:09:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:09:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:09:01,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:09:01,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:09:02,184 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:09:02,184 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 20:09:02,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:09:02 BoogieIcfgContainer [2021-02-21 20:09:02,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:09:02,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:09:02,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:09:02,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:09:02,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:09:01" (1/3) ... [2021-02-21 20:09:02,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e84da87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:09:02, skipping insertion in model container [2021-02-21 20:09:02,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:09:01" (2/3) ... [2021-02-21 20:09:02,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e84da87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:09:02, skipping insertion in model container [2021-02-21 20:09:02,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:09:02" (3/3) ... [2021-02-21 20:09:02,210 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2021-02-21 20:09:02,227 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:09:02,231 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:09:02,255 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:09:02,286 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:09:02,286 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:09:02,286 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:09:02,286 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:09:02,287 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:09:02,287 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:09:02,287 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:09:02,287 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:09:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2021-02-21 20:09:02,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-21 20:09:02,319 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:09:02,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:09:02,321 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:09:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:09:02,329 INFO L82 PathProgramCache]: Analyzing trace with hash 803602432, now seen corresponding path program 1 times [2021-02-21 20:09:02,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:09:02,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967188332] [2021-02-21 20:09:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:09:02,433 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:09:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:09:02,598 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:09:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:09:02,723 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:09:02,800 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:09:02,800 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:09:02,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:09:02,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:09:02 BoogieIcfgContainer [2021-02-21 20:09:02,843 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:09:02,850 INFO L168 Benchmark]: Toolchain (without parser) took 1499.29 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 108.0 MB in the end (delta: 18.7 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. [2021-02-21 20:09:02,851 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:09:02,854 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.29 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 115.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 20:09:02,855 INFO L168 Benchmark]: Boogie Preprocessor took 40.25 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 113.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:09:02,857 INFO L168 Benchmark]: RCFGBuilder took 522.77 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 127.9 MB in the end (delta: -14.5 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. [2021-02-21 20:09:02,858 INFO L168 Benchmark]: TraceAbstraction took 649.95 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 108.0 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-02-21 20:09:02,866 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 256.29 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 115.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.25 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 113.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 522.77 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 127.9 MB in the end (delta: -14.5 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 649.95 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 108.0 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 22, overapproximation of bitwiseAnd at line 37, overapproximation of someBinaryArithmeticDOUBLEoperation at line 51, 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) [L12] COND FALSE !(!cond) [L61] RET assume_abort_if_not(x >= 1. && x <= 1e10) [L63] CALL, EXPR sqrt_custom(x) [L31] union u x; [L32] double r; [L33] int exp; [L35] x.d = a [L37] EXPR x.i[0] [L37] exp = (x.i[0] & 0x7FF00000) >> 20 [L38] EXPR x.i[0] [L38] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L39] EXPR x.d [L39] r = x.d * 0.5 [L41] r = C1+C2+(C3+(C4+C5*r)*r)*r [L43] COND FALSE !(exp % 2 == 0) [L47] r = r * C0 [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) [L63] y = sqrt_custom(x) [L65] CALL __VERIFIER_assert(y >= 0. && y <= 1e6) [L14] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...