/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 03:54:28,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 03:54:28,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 03:54:28,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 03:54:28,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 03:54:28,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 03:54:28,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 03:54:28,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 03:54:28,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 03:54:28,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 03:54:28,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 03:54:28,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 03:54:28,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 03:54:28,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 03:54:28,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 03:54:28,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 03:54:28,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 03:54:28,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 03:54:28,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 03:54:28,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 03:54:28,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 03:54:28,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 03:54:28,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 03:54:28,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 03:54:28,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 03:54:28,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 03:54:28,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 03:54:28,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 03:54:28,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 03:54:28,893 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 03:54:28,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 03:54:28,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 03:54:28,898 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 03:54:28,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 03:54:28,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 03:54:28,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 03:54:28,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 03:54:28,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 03:54:28,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 03:54:28,901 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 03:54:28,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 03:54:28,901 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 03:54:28,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 03:54:28,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 03:54:28,902 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 03:54:28,902 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 03:54:28,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 03:54:28,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 03:54:28,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 03:54:28,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 03:54:28,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 03:54:28,903 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 03:54:28,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 03:54:29,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 03:54:29,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 03:54:29,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 03:54:29,333 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 03:54:29,334 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 03:54:29,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2021-02-24 03:54:29,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcb2d5d0e/049114f4852c4200899a073519fadbbe/FLAG4ae58a116 [2021-02-24 03:54:30,160 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 03:54:30,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2021-02-24 03:54:30,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcb2d5d0e/049114f4852c4200899a073519fadbbe/FLAG4ae58a116 [2021-02-24 03:54:30,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcb2d5d0e/049114f4852c4200899a073519fadbbe [2021-02-24 03:54:30,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 03:54:30,501 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 03:54:30,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 03:54:30,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 03:54:30,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 03:54:30,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:54:30" (1/1) ... [2021-02-24 03:54:30,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10622a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:54:30, skipping insertion in model container [2021-02-24 03:54:30,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:54:30" (1/1) ... [2021-02-24 03:54:30,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 03:54:30,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 03:54:30,695 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] [2021-02-24 03:54:30,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 03:54:30,731 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 03:54:30,746 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] [2021-02-24 03:54:30,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 03:54:30,780 INFO L208 MainTranslator]: Completed translation [2021-02-24 03:54:30,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:54:30 WrapperNode [2021-02-24 03:54:30,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 03:54:30,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 03:54:30,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 03:54:30,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 03:54:30,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:54:30" (1/1) ... [2021-02-24 03:54:30,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:54:30" (1/1) ... [2021-02-24 03:54:30,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:54:30" (1/1) ... [2021-02-24 03:54:30,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:54:30" (1/1) ... [2021-02-24 03:54:30,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:54:30" (1/1) ... [2021-02-24 03:54:30,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:54:30" (1/1) ... [2021-02-24 03:54:30,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:54:30" (1/1) ... [2021-02-24 03:54:30,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 03:54:30,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 03:54:30,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 03:54:30,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 03:54:30,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:54:30" (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 [2021-02-24 03:54:30,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 03:54:30,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 03:54:30,961 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 03:54:30,961 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 03:54:30,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 03:54:30,961 INFO L138 BoogieDeclarations]: Found implementation of procedure sqrt_custom [2021-02-24 03:54:30,961 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 03:54:30,962 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 03:54:30,962 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 03:54:30,963 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 03:54:30,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 03:54:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2021-02-24 03:54:30,964 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 03:54:30,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 03:54:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure sqrt_custom [2021-02-24 03:54:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-24 03:54:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 03:54:30,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 03:54:30,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-24 03:54:30,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 03:54:30,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 03:54:30,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 03:54:30,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 03:54:30,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 03:54:31,688 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 03:54:31,689 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 03:54:31,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:54:31 BoogieIcfgContainer [2021-02-24 03:54:31,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 03:54:31,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 03:54:31,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 03:54:31,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 03:54:31,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:54:30" (1/3) ... [2021-02-24 03:54:31,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8f3e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:54:31, skipping insertion in model container [2021-02-24 03:54:31,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:54:30" (2/3) ... [2021-02-24 03:54:31,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8f3e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:54:31, skipping insertion in model container [2021-02-24 03:54:31,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:54:31" (3/3) ... [2021-02-24 03:54:31,705 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2021-02-24 03:54:31,712 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 03:54:31,718 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 03:54:31,738 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 03:54:31,773 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 03:54:31,774 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 03:54:31,774 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 03:54:31,774 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 03:54:31,774 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 03:54:31,775 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 03:54:31,775 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 03:54:31,775 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 03:54:31,798 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2021-02-24 03:54:31,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-24 03:54:31,813 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:54:31,814 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] [2021-02-24 03:54:31,815 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:54:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:54:31,824 INFO L82 PathProgramCache]: Analyzing trace with hash 803602432, now seen corresponding path program 1 times [2021-02-24 03:54:31,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:54:31,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351732528] [2021-02-24 03:54:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:54:31,928 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:54:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 03:54:32,178 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 03:54:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 03:54:32,301 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 03:54:32,346 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 03:54:32,346 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 03:54:32,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 03:54:32,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 03:54:32 BoogieIcfgContainer [2021-02-24 03:54:32,368 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 03:54:32,371 INFO L168 Benchmark]: Toolchain (without parser) took 1881.32 ms. Allocated memory is still 152.0 MB. Free memory was 127.9 MB in the beginning and 107.5 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.6 MB. Max. memory is 8.0 GB. [2021-02-24 03:54:32,372 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 152.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 03:54:32,373 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.35 ms. Allocated memory is still 152.0 MB. Free memory was 126.8 MB in the beginning and 116.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 03:54:32,374 INFO L168 Benchmark]: Boogie Preprocessor took 46.42 ms. Allocated memory is still 152.0 MB. Free memory was 116.5 MB in the beginning and 114.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 03:54:32,375 INFO L168 Benchmark]: RCFGBuilder took 861.97 ms. Allocated memory is still 152.0 MB. Free memory was 114.8 MB in the beginning and 127.4 MB in the end (delta: -12.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-24 03:54:32,377 INFO L168 Benchmark]: TraceAbstraction took 673.63 ms. Allocated memory is still 152.0 MB. Free memory was 126.9 MB in the beginning and 107.5 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-02-24 03:54:32,382 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 152.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.35 ms. Allocated memory is still 152.0 MB. Free memory was 126.8 MB in the beginning and 116.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.42 ms. Allocated memory is still 152.0 MB. Free memory was 116.5 MB in the beginning and 114.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 861.97 ms. Allocated memory is still 152.0 MB. Free memory was 114.8 MB in the beginning and 127.4 MB in the end (delta: -12.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 673.63 ms. Allocated memory is still 152.0 MB. Free memory was 126.9 MB in the beginning and 107.5 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...