/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=WIDEST --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 [2020-09-25 03:07:05,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:07:05,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:07:05,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:07:05,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:07:05,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:07:05,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:07:05,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:07:05,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:07:05,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:07:05,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:07:05,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:07:05,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:07:05,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:07:05,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:07:05,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:07:05,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:07:05,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:07:05,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:07:05,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:07:05,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:07:05,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:07:05,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:07:05,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:07:05,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:07:05,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:07:05,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:07:05,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:07:05,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:07:05,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:07:05,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:07:05,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:07:05,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:07:05,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:07:05,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:07:05,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:07:05,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:07:05,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:07:05,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:07:05,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:07:05,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:07:05,165 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 [2020-09-25 03:07:05,207 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:07:05,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:07:05,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:07:05,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:07:05,210 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:07:05,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:07:05,211 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:07:05,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:07:05,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:07:05,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:07:05,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:07:05,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:07:05,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:07:05,213 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:07:05,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:07:05,214 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:07:05,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:07:05,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:07:05,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:07:05,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:07:05,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:07:05,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:07:05,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:07:05,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:07:05,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:07:05,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:07:05,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:07:05,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:07:05,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:07:05,217 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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;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=WIDEST;log-additional-information=true; [2020-09-25 03:07:05,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:07:05,917 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:07:05,924 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:07:05,925 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:07:05,926 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:07:05,927 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-09-25 03:07:06,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2831cac10/1565e99c4ac9496bb05d3b916ee473a1/FLAG36e79c407 [2020-09-25 03:07:06,536 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:07:06,539 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-09-25 03:07:06,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2831cac10/1565e99c4ac9496bb05d3b916ee473a1/FLAG36e79c407 [2020-09-25 03:07:06,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2831cac10/1565e99c4ac9496bb05d3b916ee473a1 [2020-09-25 03:07:06,836 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:07:06,843 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:07:06,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:07:06,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:07:06,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:07:06,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:07:06" (1/1) ... [2020-09-25 03:07:06,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488a3702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:07:06, skipping insertion in model container [2020-09-25 03:07:06,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:07:06" (1/1) ... [2020-09-25 03:07:06,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:07:06,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:07:07,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:07:07,199 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:07:07,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:07:07,351 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:07:07,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:07:07 WrapperNode [2020-09-25 03:07:07,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:07:07,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:07:07,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:07:07,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:07:07,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:07:07" (1/1) ... [2020-09-25 03:07:07,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:07:07" (1/1) ... [2020-09-25 03:07:07,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:07:07" (1/1) ... [2020-09-25 03:07:07,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:07:07" (1/1) ... [2020-09-25 03:07:07,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:07:07" (1/1) ... [2020-09-25 03:07:07,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:07:07" (1/1) ... [2020-09-25 03:07:07,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:07:07" (1/1) ... [2020-09-25 03:07:07,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:07:07,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:07:07,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:07:07,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:07:07,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:07:07" (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 [2020-09-25 03:07:07,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:07:07,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:07:07,497 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 03:07:07,497 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:07:07,497 INFO L138 BoogieDeclarations]: Found implementation of procedure sqrt_custom [2020-09-25 03:07:07,497 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:07:07,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:07:07,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-09-25 03:07:07,498 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 03:07:07,499 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 03:07:07,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:07:07,499 INFO L130 BoogieDeclarations]: Found specification of procedure sqrt_custom [2020-09-25 03:07:07,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 03:07:07,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-25 03:07:07,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 03:07:07,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 03:07:07,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-25 03:07:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 03:07:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:07:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:07:07,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:07:07,915 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:07:07,915 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 03:07:07,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:07:07 BoogieIcfgContainer [2020-09-25 03:07:07,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:07:07,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:07:07,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:07:07,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:07:07,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:07:06" (1/3) ... [2020-09-25 03:07:07,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccb836e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:07:07, skipping insertion in model container [2020-09-25 03:07:07,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:07:07" (2/3) ... [2020-09-25 03:07:07,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccb836e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:07:07, skipping insertion in model container [2020-09-25 03:07:07,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:07:07" (3/3) ... [2020-09-25 03:07:07,929 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-09-25 03:07:07,938 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:07:07,948 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:07:07,970 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:07:08,000 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:07:08,001 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:07:08,001 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:07:08,001 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:07:08,001 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:07:08,001 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:07:08,001 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:07:08,002 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:07:08,028 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states. [2020-09-25 03:07:08,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-25 03:07:08,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:07:08,040 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] [2020-09-25 03:07:08,040 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:07:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:07:08,047 INFO L82 PathProgramCache]: Analyzing trace with hash 284093711, now seen corresponding path program 1 times [2020-09-25 03:07:08,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:07:08,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180687125] [2020-09-25 03:07:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:07:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 03:07:08,303 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 03:07:08,304 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 03:07:08,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:07:08,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 03:07:08 BoogieIcfgContainer [2020-09-25 03:07:08,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 03:07:08,338 INFO L168 Benchmark]: Toolchain (without parser) took 1498.22 ms. Allocated memory was 140.5 MB in the beginning and 201.9 MB in the end (delta: 61.3 MB). Free memory was 103.5 MB in the beginning and 139.3 MB in the end (delta: -35.8 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-09-25 03:07:08,339 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.5 MB. Free memory was 121.2 MB in the beginning and 120.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-25 03:07:08,340 INFO L168 Benchmark]: CACSL2BoogieTranslator took 508.66 ms. Allocated memory was 140.5 MB in the beginning and 201.9 MB in the end (delta: 61.3 MB). Free memory was 102.8 MB in the beginning and 179.8 MB in the end (delta: -77.0 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-09-25 03:07:08,341 INFO L168 Benchmark]: Boogie Preprocessor took 46.97 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 177.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-09-25 03:07:08,342 INFO L168 Benchmark]: RCFGBuilder took 521.05 ms. Allocated memory is still 201.9 MB. Free memory was 177.7 MB in the beginning and 156.5 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 7.1 GB. [2020-09-25 03:07:08,343 INFO L168 Benchmark]: TraceAbstraction took 412.05 ms. Allocated memory is still 201.9 MB. Free memory was 155.8 MB in the beginning and 139.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-09-25 03:07:08,347 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.5 MB. Free memory was 121.2 MB in the beginning and 120.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 508.66 ms. Allocated memory was 140.5 MB in the beginning and 201.9 MB in the end (delta: 61.3 MB). Free memory was 102.8 MB in the beginning and 179.8 MB in the end (delta: -77.0 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.97 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 177.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 521.05 ms. Allocated memory is still 201.9 MB. Free memory was 177.7 MB in the beginning and 156.5 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 412.05 ms. Allocated memory is still 201.9 MB. Free memory was 155.8 MB in the beginning and 139.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 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...