/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/double_req_bl_0730b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:50:12,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:50:12,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:50:12,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:50:12,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:50:12,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:50:12,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:50:12,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:50:12,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:50:12,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:50:12,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:50:12,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:50:12,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:50:12,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:50:12,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:50:12,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:50:12,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:50:12,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:50:12,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:50:12,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:50:12,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:50:12,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:50:12,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:50:12,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:50:12,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:50:12,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:50:12,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:50:12,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:50:12,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:50:12,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:50:12,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:50:12,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:50:12,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:50:12,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:50:12,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:50:12,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:50:12,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:50:12,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:50:12,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:50:12,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:50:12,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:50:12,852 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 [2020-08-18 17:50:12,882 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:50:12,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:50:12,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:50:12,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:50:12,886 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:50:12,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:50:12,886 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:50:12,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:50:12,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:50:12,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:50:12,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:50:12,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:50:12,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:50:12,887 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:50:12,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:50:12,889 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:50:12,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:50:12,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:50:12,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:50:12,890 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:50:12,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:50:12,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:50:12,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:50:12,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:50:12,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:50:12,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:50:12,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:50:12,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:50:12,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:50:12,893 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:50:13,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:50:13,216 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:50:13,220 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:50:13,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:50:13,222 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:50:13,222 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_0730b.c [2020-08-18 17:50:13,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7509f7f2c/8666c0a84ab8410b925e887a07933986/FLAG809b0ca00 [2020-08-18 17:50:13,749 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:50:13,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/double_req_bl_0730b.c [2020-08-18 17:50:13,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7509f7f2c/8666c0a84ab8410b925e887a07933986/FLAG809b0ca00 [2020-08-18 17:50:14,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7509f7f2c/8666c0a84ab8410b925e887a07933986 [2020-08-18 17:50:14,144 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:50:14,146 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:50:14,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:50:14,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:50:14,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:50:14,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:50:14" (1/1) ... [2020-08-18 17:50:14,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c286c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:14, skipping insertion in model container [2020-08-18 17:50:14,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:50:14" (1/1) ... [2020-08-18 17:50:14,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:50:14,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:50:14,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:50:14,436 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:50:14,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:50:14,601 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:50:14,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:14 WrapperNode [2020-08-18 17:50:14,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:50:14,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:50:14,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:50:14,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:50:14,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:14" (1/1) ... [2020-08-18 17:50:14,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:14" (1/1) ... [2020-08-18 17:50:14,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:14" (1/1) ... [2020-08-18 17:50:14,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:14" (1/1) ... [2020-08-18 17:50:14,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:14" (1/1) ... [2020-08-18 17:50:14,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:14" (1/1) ... [2020-08-18 17:50:14,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:14" (1/1) ... [2020-08-18 17:50:14,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:50:14,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:50:14,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:50:14,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:50:14,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:14" (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 [2020-08-18 17:50:14,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:50:14,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:50:14,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrt [2020-08-18 17:50:14,721 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2020-08-18 17:50:14,721 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:50:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:50:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-08-18 17:50:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrt [2020-08-18 17:50:14,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:50:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 17:50:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:50:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:50:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:50:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 17:50:14,722 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2020-08-18 17:50:14,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:50:14,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:50:14,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:50:15,216 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:50:15,216 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-18 17:50:15,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:50:15 BoogieIcfgContainer [2020-08-18 17:50:15,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:50:15,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:50:15,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:50:15,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:50:15,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:50:14" (1/3) ... [2020-08-18 17:50:15,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39238dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:50:15, skipping insertion in model container [2020-08-18 17:50:15,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:14" (2/3) ... [2020-08-18 17:50:15,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39238dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:50:15, skipping insertion in model container [2020-08-18 17:50:15,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:50:15" (3/3) ... [2020-08-18 17:50:15,230 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_0730b.c [2020-08-18 17:50:15,240 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:50:15,248 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:50:15,267 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:50:15,292 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:50:15,293 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:50:15,293 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:50:15,293 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:50:15,293 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:50:15,294 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:50:15,294 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:50:15,294 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:50:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-08-18 17:50:15,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 17:50:15,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:15,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:15,327 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:15,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash 85253742, now seen corresponding path program 1 times [2020-08-18 17:50:15,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:15,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405881759] [2020-08-18 17:50:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:15,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:15,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:50:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:50:15,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405881759] [2020-08-18 17:50:15,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:50:15,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:50:15,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016511555] [2020-08-18 17:50:15,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:50:15,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:15,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:50:15,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:50:15,595 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 4 states. [2020-08-18 17:50:15,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:15,930 INFO L93 Difference]: Finished difference Result 124 states and 187 transitions. [2020-08-18 17:50:15,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:50:15,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-18 17:50:15,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:15,944 INFO L225 Difference]: With dead ends: 124 [2020-08-18 17:50:15,944 INFO L226 Difference]: Without dead ends: 62 [2020-08-18 17:50:15,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:50:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-18 17:50:15,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-08-18 17:50:15,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 17:50:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2020-08-18 17:50:16,003 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 16 [2020-08-18 17:50:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:16,004 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2020-08-18 17:50:16,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:50:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2020-08-18 17:50:16,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 17:50:16,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:16,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:16,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:50:16,007 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:16,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:16,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1037787104, now seen corresponding path program 1 times [2020-08-18 17:50:16,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:16,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520684245] [2020-08-18 17:50:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:50:16,068 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:50:16,069 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:50:16,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:50:16,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:50:16 BoogieIcfgContainer [2020-08-18 17:50:16,094 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:50:16,098 INFO L168 Benchmark]: Toolchain (without parser) took 1950.49 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 101.1 MB in the beginning and 89.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 75.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:16,099 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 17:50:16,100 INFO L168 Benchmark]: CACSL2BoogieTranslator took 454.35 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 100.9 MB in the beginning and 176.5 MB in the end (delta: -75.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:16,101 INFO L168 Benchmark]: Boogie Preprocessor took 57.35 ms. Allocated memory is still 200.8 MB. Free memory was 176.5 MB in the beginning and 174.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:16,102 INFO L168 Benchmark]: RCFGBuilder took 560.81 ms. Allocated memory is still 200.8 MB. Free memory was 174.4 MB in the beginning and 144.3 MB in the end (delta: 30.1 MB). Peak memory consumption was 30.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:16,103 INFO L168 Benchmark]: TraceAbstraction took 872.14 ms. Allocated memory is still 200.8 MB. Free memory was 143.7 MB in the beginning and 89.0 MB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:16,107 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 454.35 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 100.9 MB in the beginning and 176.5 MB in the end (delta: -75.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 57.35 ms. Allocated memory is still 200.8 MB. Free memory was 176.5 MB in the beginning and 174.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 560.81 ms. Allocated memory is still 200.8 MB. Free memory was 174.4 MB in the beginning and 144.3 MB in the end (delta: 30.1 MB). Peak memory consumption was 30.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 872.14 ms. Allocated memory is still 200.8 MB. Free memory was 143.7 MB in the beginning and 89.0 MB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 154]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someUnaryDOUBLEoperation at line 149, overapproximation of someBinaryArithmeticDOUBLEoperation at line 33, overapproximation of bitwiseAnd at line 32, overapproximation of someBinaryDOUBLEComparisonOperation at line 153. Possible FailurePath: [L17] static const double one_sqrt = 1.0, tiny_sqrt = 1.0e-300; [L149] double x = -0.0; [L150] CALL, EXPR __ieee754_sqrt(x) [L20] double z; [L21] __int32_t sign = 0x80000000; [L22] __uint32_t r, t1, s1, ix1, q1; [L23] __int32_t ix0, s0, q, m, t, i; [L26] ieee_double_shape_type ew_u; [L27] ew_u.value = (x) [L28] EXPR ew_u.parts.msw [L28] (ix0) = ew_u.parts.msw [L29] EXPR ew_u.parts.lsw [L29] (ix1) = ew_u.parts.lsw [L32] COND TRUE (ix0 & 0x7ff00000) == 0x7ff00000 [L33] return x * x + x; [L150] RET, EXPR __ieee754_sqrt(x) [L150] double res = __ieee754_sqrt(x); [L153] EXPR res == -0.0 && __signbit_double(res) == 1 [L153] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L154] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 66 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 80 SDtfs, 75 SDslu, 5 SDs, 0 SdLazy, 85 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred 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: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 630 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...