/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 SequenceOfStatements --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0833.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:19:54,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:19:54,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:19:55,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:19:55,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:19:55,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:19:55,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:19:55,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:19:55,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:19:55,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:19:55,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:19:55,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:19:55,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:19:55,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:19:55,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:19:55,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:19:55,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:19:55,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:19:55,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:19:55,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:19:55,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:19:55,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:19:55,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:19:55,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:19:55,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:19:55,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:19:55,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:19:55,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:19:55,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:19:55,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:19:55,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:19:55,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:19:55,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:19:55,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:19:55,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:19:55,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:19:55,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:19:55,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:19:55,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:19:55,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:19:55,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:19:55,058 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 [2020-10-13 10:19:55,081 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:19:55,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:19:55,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:19:55,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:19:55,083 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:19:55,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:19:55,084 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:19:55,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:19:55,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:19:55,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:19:55,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:19:55,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:19:55,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:19:55,085 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:19:55,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:19:55,085 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:19:55,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:19:55,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:19:55,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:19:55,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:19:55,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:19:55,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:19:55,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:19:55,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:19:55,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:19:55,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:19:55,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:19:55,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:19:55,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:19:55,088 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 -> SequenceOfStatements 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:19:55,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:19:55,429 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:19:55,432 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:19:55,434 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:19:55,434 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:19:55,435 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0833.c [2020-10-13 10:19:55,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77d63a859/3538153107514190b340c75a20a1e2cc/FLAG5c79050ab [2020-10-13 10:19:56,038 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:19:56,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_0833.c [2020-10-13 10:19:56,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77d63a859/3538153107514190b340c75a20a1e2cc/FLAG5c79050ab [2020-10-13 10:19:56,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77d63a859/3538153107514190b340c75a20a1e2cc [2020-10-13 10:19:56,430 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:19:56,432 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:19:56,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:19:56,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:19:56,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:19:56,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:19:56" (1/1) ... [2020-10-13 10:19:56,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e8547d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:56, skipping insertion in model container [2020-10-13 10:19:56,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:19:56" (1/1) ... [2020-10-13 10:19:56,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:19:56,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:19:56,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:19:56,712 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:19:56,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:19:56,871 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:19:56,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:56 WrapperNode [2020-10-13 10:19:56,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:19:56,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:19:56,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:19:56,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:19:56,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:56" (1/1) ... [2020-10-13 10:19:56,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:56" (1/1) ... [2020-10-13 10:19:56,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:56" (1/1) ... [2020-10-13 10:19:56,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:56" (1/1) ... [2020-10-13 10:19:56,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:56" (1/1) ... [2020-10-13 10:19:56,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:56" (1/1) ... [2020-10-13 10:19:56,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:56" (1/1) ... [2020-10-13 10:19:56,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:19:56,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:19:56,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:19:56,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:19:56,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:56" (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 [2020-10-13 10:19:57,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:19:57,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:19:57,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_expf [2020-10-13 10:19:57,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-10-13 10:19:57,002 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:19:57,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:19:57,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-13 10:19:57,003 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_expf [2020-10-13 10:19:57,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:19:57,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-13 10:19:57,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:19:57,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:19:57,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-13 10:19:57,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:19:57,004 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-10-13 10:19:57,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:19:57,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:19:57,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-10-13 10:19:57,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:19:57,464 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:19:57,465 INFO L295 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-13 10:19:57,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:19:57 BoogieIcfgContainer [2020-10-13 10:19:57,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:19:57,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:19:57,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:19:57,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:19:57,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:19:56" (1/3) ... [2020-10-13 10:19:57,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b805ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:19:57, skipping insertion in model container [2020-10-13 10:19:57,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:56" (2/3) ... [2020-10-13 10:19:57,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b805ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:19:57, skipping insertion in model container [2020-10-13 10:19:57,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:19:57" (3/3) ... [2020-10-13 10:19:57,478 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0833.c [2020-10-13 10:19:57,489 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:19:57,497 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:19:57,510 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:19:57,531 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:19:57,531 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:19:57,531 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:19:57,531 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:19:57,532 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:19:57,532 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:19:57,532 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:19:57,532 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:19:57,550 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-13 10:19:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:19:57,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:57,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:57,558 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:57,563 INFO L82 PathProgramCache]: Analyzing trace with hash 650206756, now seen corresponding path program 1 times [2020-10-13 10:19:57,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:57,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357738463] [2020-10-13 10:19:57,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:57,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:57,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:57,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:19:57,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:57,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-13 10:19:57,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:57,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:57,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:19:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:57,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:19:57,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:19:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:57,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:57,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:57,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:19:57,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:57,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 10:19:57,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:58,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:58,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:19:58,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:58,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:19:58,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:19:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:19:58,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:19:58,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:19:58,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 10:19:58,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:19:58,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 10:19:58,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:19:58,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:19:58,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 10:19:58,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:19:58,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:19:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:19:58,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357738463] [2020-10-13 10:19:58,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:19:58,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:19:58,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776938917] [2020-10-13 10:19:58,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:19:58,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:19:58,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:19:58,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:19:58,107 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2020-10-13 10:19:58,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:19:58,452 INFO L93 Difference]: Finished difference Result 100 states and 149 transitions. [2020-10-13 10:19:58,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:19:58,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 10:19:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:19:58,465 INFO L225 Difference]: With dead ends: 100 [2020-10-13 10:19:58,466 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 10:19:58,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:19:58,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 10:19:58,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-13 10:19:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 10:19:58,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2020-10-13 10:19:58,519 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 17 [2020-10-13 10:19:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:19:58,520 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2020-10-13 10:19:58,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:19:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2020-10-13 10:19:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:19:58,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:19:58,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:19:58,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:19:58,523 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:19:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:19:58,523 INFO L82 PathProgramCache]: Analyzing trace with hash -96221423, now seen corresponding path program 1 times [2020-10-13 10:19:58,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:19:58,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671403135] [2020-10-13 10:19:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:19:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 10:19:58,565 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 10:19:58,565 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 10:19:58,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:19:58,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:19:58 BoogieIcfgContainer [2020-10-13 10:19:58,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:19:58,594 INFO L168 Benchmark]: Toolchain (without parser) took 2161.09 ms. Allocated memory was 143.1 MB in the beginning and 233.3 MB in the end (delta: 90.2 MB). Free memory was 101.1 MB in the beginning and 180.0 MB in the end (delta: -78.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-10-13 10:19:58,595 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 143.1 MB. Free memory was 120.2 MB in the beginning and 119.8 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-13 10:19:58,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 439.56 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 100.6 MB in the beginning and 177.1 MB in the end (delta: -76.4 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-10-13 10:19:58,597 INFO L168 Benchmark]: Boogie Preprocessor took 57.41 ms. Allocated memory is still 200.8 MB. Free memory was 177.1 MB in the beginning and 174.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-10-13 10:19:58,598 INFO L168 Benchmark]: RCFGBuilder took 539.16 ms. Allocated memory is still 200.8 MB. Free memory was 174.2 MB in the beginning and 146.4 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2020-10-13 10:19:58,599 INFO L168 Benchmark]: TraceAbstraction took 1119.73 ms. Allocated memory was 200.8 MB in the beginning and 233.3 MB in the end (delta: 32.5 MB). Free memory was 146.4 MB in the beginning and 180.0 MB in the end (delta: -33.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 10:19:58,603 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 143.1 MB. Free memory was 120.2 MB in the beginning and 119.8 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 439.56 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 100.6 MB in the beginning and 177.1 MB in the end (delta: -76.4 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 57.41 ms. Allocated memory is still 200.8 MB. Free memory was 177.1 MB in the beginning and 174.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 539.16 ms. Allocated memory is still 200.8 MB. Free memory was 174.2 MB in the beginning and 146.4 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1119.73 ms. Allocated memory was 200.8 MB in the beginning and 233.3 MB in the end (delta: 32.5 MB). Free memory was 146.4 MB in the beginning and 180.0 MB in the end (delta: -33.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 131]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 130, overapproximation of someUnaryDOUBLEoperation at line 16, overapproximation of bitwiseAnd at line 43, overapproximation of someBinaryArithmeticFLOAToperation at line 47. Possible FailurePath: [L12-L31] static const float one_exp = 1.0, halF_exp[2] = { 0.5, -0.5, }, huge_exp = 1.0e+30, twom100_exp = 7.8886090522e-31, ln2HI_exp[2] = { 6.9313812256e-01, -6.9313812256e-01, }, ln2LO_exp[2] = { 9.0580006145e-06, -9.0580006145e-06, }, invln2_exp = 1.4426950216e+00, P1_exp = 1.6666667163e-01, P2_exp = -2.7777778450e-03, P3_exp = 6.6137559770e-05, P4_exp = -1.6533901999e-06, P5_exp = 4.1381369442e-08; [L126] float x = -1.0f / 0.0f; [L127] CALL, EXPR __ieee754_expf(x) [L34] float y, hi, lo, c, t; [L35] __int32_t k = 0, xsb, sx; [L36] __uint32_t hx; [L39] ieee_float_shape_type gf_u; [L40] gf_u.value = (x) [L41] EXPR gf_u.word [L41] (sx) = gf_u.word [L43] xsb = (sx >> 31) & 1 [L44] hx = sx & 0x7fffffff [L46] COND TRUE ((hx) > 0x7f800000L) [L47] return x + x; [L127] RET, EXPR __ieee754_expf(x) [L127] float res = __ieee754_expf(x); [L130] EXPR res == 0.0f && __signbit_float(res) == 0 [L130] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L131] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 62 SDtfs, 6 SDslu, 53 SDs, 0 SdLazy, 66 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred 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, 0.3s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 1360 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...