/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:21:39,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:21:39,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:21:39,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:21:39,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:21:39,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:21:39,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:21:39,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:21:39,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:21:39,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:21:39,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:21:39,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:21:39,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:21:39,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:21:39,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:21:39,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:21:39,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:21:39,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:21:39,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:21:39,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:21:39,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:21:39,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:21:39,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:21:39,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:21:39,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:21:39,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:21:39,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:21:39,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:21:39,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:21:39,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:21:39,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:21:39,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:21:39,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:21:39,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:21:39,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:21:39,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:21:39,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:21:39,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:21:39,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:21:39,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:21:39,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:21:39,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 20:21:39,303 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:21:39,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:21:39,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:21:39,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:21:39,305 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:21:39,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:21:39,306 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:21:39,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:21:39,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:21:39,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:21:39,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:21:39,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:21:39,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:21:39,307 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:21:39,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:21:39,308 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:21:39,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:21:39,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:21:39,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:21:39,308 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:21:39,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:21:39,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:21:39,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:21:39,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:21:39,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:21:39,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:21:39,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:21:39,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:21:39,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:21:39,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-09-24 20:21:39,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:21:39,813 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:21:39,818 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:21:39,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:21:39,821 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:21:39,822 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-09-24 20:21:39,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/510fbe380/b0712b0bc5d54297be0d19490876a6e5/FLAG9c7677ec4 [2020-09-24 20:21:40,453 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:21:40,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-09-24 20:21:40,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/510fbe380/b0712b0bc5d54297be0d19490876a6e5/FLAG9c7677ec4 [2020-09-24 20:21:40,790 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/510fbe380/b0712b0bc5d54297be0d19490876a6e5 [2020-09-24 20:21:40,806 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:21:40,813 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:21:40,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:21:40,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:21:40,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:21:40,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:21:40" (1/1) ... [2020-09-24 20:21:40,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31d5df5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:21:40, skipping insertion in model container [2020-09-24 20:21:40,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:21:40" (1/1) ... [2020-09-24 20:21:40,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:21:40,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:21:41,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:21:41,099 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:21:41,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:21:41,240 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:21:41,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:21:41 WrapperNode [2020-09-24 20:21:41,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:21:41,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:21:41,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:21:41,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:21:41,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:21:41" (1/1) ... [2020-09-24 20:21:41,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:21:41" (1/1) ... [2020-09-24 20:21:41,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:21:41" (1/1) ... [2020-09-24 20:21:41,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:21:41" (1/1) ... [2020-09-24 20:21:41,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:21:41" (1/1) ... [2020-09-24 20:21:41,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:21:41" (1/1) ... [2020-09-24 20:21:41,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:21:41" (1/1) ... [2020-09-24 20:21:41,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:21:41,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:21:41,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:21:41,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:21:41,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:21:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 20:21:41,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:21:41,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:21:41,376 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:21:41,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:21:41,377 INFO L138 BoogieDeclarations]: Found implementation of procedure sqrt_custom [2020-09-24 20:21:41,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:21:41,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:21:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-09-24 20:21:41,379 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:21:41,379 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:21:41,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:21:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure sqrt_custom [2020-09-24 20:21:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 20:21:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-24 20:21:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 20:21:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 20:21:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-24 20:21:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 20:21:41,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:21:41,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:21:41,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:21:41,782 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:21:41,782 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 20:21:41,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:21:41 BoogieIcfgContainer [2020-09-24 20:21:41,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:21:41,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:21:41,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:21:41,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:21:41,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:21:40" (1/3) ... [2020-09-24 20:21:41,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ceed104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:21:41, skipping insertion in model container [2020-09-24 20:21:41,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:21:41" (2/3) ... [2020-09-24 20:21:41,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ceed104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:21:41, skipping insertion in model container [2020-09-24 20:21:41,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:21:41" (3/3) ... [2020-09-24 20:21:41,797 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-09-24 20:21:41,806 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:21:41,816 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:21:41,838 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:21:41,866 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:21:41,867 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:21:41,867 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:21:41,867 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:21:41,867 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:21:41,867 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:21:41,867 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:21:41,867 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:21:41,890 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states. [2020-09-24 20:21:41,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 20:21:41,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:21:41,900 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, 1, 1, 1] [2020-09-24 20:21:41,901 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:21:41,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:21:41,907 INFO L82 PathProgramCache]: Analyzing trace with hash 284093711, now seen corresponding path program 1 times [2020-09-24 20:21:41,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:21:41,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588333687] [2020-09-24 20:21:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:21:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:21:42,220 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:21:42,221 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:21:42,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:21:42,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:21:42 BoogieIcfgContainer [2020-09-24 20:21:42,248 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:21:42,252 INFO L168 Benchmark]: Toolchain (without parser) took 1442.40 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 102.2 MB in the beginning and 141.4 MB in the end (delta: -39.2 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2020-09-24 20:21:42,253 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-24 20:21:42,254 INFO L168 Benchmark]: CACSL2BoogieTranslator took 426.37 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 101.8 MB in the beginning and 181.9 MB in the end (delta: -80.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-09-24 20:21:42,255 INFO L168 Benchmark]: Boogie Preprocessor took 53.87 ms. Allocated memory is still 202.9 MB. Free memory was 181.9 MB in the beginning and 179.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-09-24 20:21:42,256 INFO L168 Benchmark]: RCFGBuilder took 491.36 ms. Allocated memory is still 202.9 MB. Free memory was 179.6 MB in the beginning and 158.0 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2020-09-24 20:21:42,257 INFO L168 Benchmark]: TraceAbstraction took 459.21 ms. Allocated memory is still 202.9 MB. Free memory was 157.4 MB in the beginning and 141.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2020-09-24 20:21:42,261 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 426.37 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 101.8 MB in the beginning and 181.9 MB in the end (delta: -80.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 53.87 ms. Allocated memory is still 202.9 MB. Free memory was 181.9 MB in the beginning and 179.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 491.36 ms. Allocated memory is still 202.9 MB. Free memory was 179.6 MB in the beginning and 158.0 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 459.21 ms. Allocated memory is still 202.9 MB. Free memory was 157.4 MB in the beginning and 141.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 36, overapproximation of someUnaryDOUBLEoperation at line 20, overapproximation of bitwiseAnd at line 35, overapproximation of someBinaryArithmeticDOUBLEoperation at line 49, overapproximation of someBinaryDOUBLEComparisonOperation at line 63. Possible FailurePath: [L15] double C0 = 1.414213538; [L16] double C1 = 0.229761391; [L17] double C2 = 1.296735525; [L18] double C3 = -0.901098370; [L19] double C4 = 0.493553400; [L20] double C5 = -0.118958666; [L56] double x,y; [L58] x = __VERIFIER_nondet_double() [L59] CALL assume_abort_if_not(x >= 1. && x <= 1e10) [L10] COND FALSE !(!cond) [L59] RET assume_abort_if_not(x >= 1. && x <= 1e10) [L61] CALL, EXPR sqrt_custom(x) [L29] union u x; [L30] double r; [L31] int exp; [L33] x.d = a [L35] EXPR x.i[0] [L35] exp = (x.i[0] & 0x7FF00000) >> 20 [L36] EXPR x.i[0] [L36] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L37] EXPR x.d [L37] r = x.d * 0.5 [L39] r = C1+C2+(C3+(C4+C5*r)*r)*r [L41] COND FALSE !(exp % 2 == 0) [L45] r = r * C0 [L48] x.i[0] = (exp/2 + 511) << 20 [L49] EXPR x.d [L49] r = r * x.d [L51] return r; [L51] return r; [L61] RET, EXPR sqrt_custom(x) [L61] y = sqrt_custom(x) [L63] CALL __VERIFIER_assert(y >= 0. && y <= 1e6) [L12] COND TRUE !(cond) [L12] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, 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=75occurred 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 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 Received shutdown request...