/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=BIGGEST --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_0920a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:32:53,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:32:53,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:32:53,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:32:53,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:32:53,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:32:53,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:32:53,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:32:53,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:32:53,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:32:53,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:32:53,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:32:53,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:32:53,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:32:53,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:32:53,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:32:53,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:32:53,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:32:53,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:32:53,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:32:53,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:32:53,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:32:53,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:32:53,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:32:53,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:32:53,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:32:53,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:32:53,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:32:53,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:32:53,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:32:53,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:32:53,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:32:53,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:32:53,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:32:53,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:32:53,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:32:53,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:32:53,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:32:53,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:32:53,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:32:53,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:32:53,415 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 [2020-10-12 15:32:53,437 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:32:53,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:32:53,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:32:53,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:32:53,439 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:32:53,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:32:53,440 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:32:53,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:32:53,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:32:53,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:32:53,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:32:53,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:32:53,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:32:53,441 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:32:53,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:32:53,441 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:32:53,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:32:53,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:32:53,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:32:53,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:32:53,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:32:53,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:32:53,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:32:53,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:32:53,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:32:53,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:32:53,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:32:53,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:32:53,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:32:53,444 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:32:53,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:32:53,775 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:32:53,783 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:32:53,785 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:32:53,785 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:32:53,786 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0920a.c [2020-10-12 15:32:53,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09ef5a55c/8e09c868395e483680b537f6e6c7a0e7/FLAGa770b264a [2020-10-12 15:32:54,258 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:32:54,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_0920a.c [2020-10-12 15:32:54,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09ef5a55c/8e09c868395e483680b537f6e6c7a0e7/FLAGa770b264a [2020-10-12 15:32:54,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09ef5a55c/8e09c868395e483680b537f6e6c7a0e7 [2020-10-12 15:32:54,620 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:32:54,622 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:32:54,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:32:54,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:32:54,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:32:54,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:32:54" (1/1) ... [2020-10-12 15:32:54,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f12d333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:54, skipping insertion in model container [2020-10-12 15:32:54,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:32:54" (1/1) ... [2020-10-12 15:32:54,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:32:54,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:32:54,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:32:54,886 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:32:55,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:32:55,088 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:32:55,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:55 WrapperNode [2020-10-12 15:32:55,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:32:55,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:32:55,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:32:55,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:32:55,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:55" (1/1) ... [2020-10-12 15:32:55,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:55" (1/1) ... [2020-10-12 15:32:55,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:55" (1/1) ... [2020-10-12 15:32:55,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:55" (1/1) ... [2020-10-12 15:32:55,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:55" (1/1) ... [2020-10-12 15:32:55,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:55" (1/1) ... [2020-10-12 15:32:55,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:55" (1/1) ... [2020-10-12 15:32:55,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:32:55,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:32:55,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:32:55,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:32:55,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:55" (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 [2020-10-12 15:32:55,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:32:55,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:32:55,204 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2020-10-12 15:32:55,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_logf [2020-10-12 15:32:55,205 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-10-12 15:32:55,205 INFO L138 BoogieDeclarations]: Found implementation of procedure isfinite_float [2020-10-12 15:32:55,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:32:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:32:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-12 15:32:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2020-10-12 15:32:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 15:32:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-12 15:32:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:32:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:32:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_logf [2020-10-12 15:32:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:32:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-12 15:32:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-10-12 15:32:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure isfinite_float [2020-10-12 15:32:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:32:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:32:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:32:55,614 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:32:55,615 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-12 15:32:55,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:32:55 BoogieIcfgContainer [2020-10-12 15:32:55,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:32:55,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:32:55,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:32:55,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:32:55,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:32:54" (1/3) ... [2020-10-12 15:32:55,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8245c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:32:55, skipping insertion in model container [2020-10-12 15:32:55,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:32:55" (2/3) ... [2020-10-12 15:32:55,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8245c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:32:55, skipping insertion in model container [2020-10-12 15:32:55,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:32:55" (3/3) ... [2020-10-12 15:32:55,629 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0920a.c [2020-10-12 15:32:55,643 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:32:55,651 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:32:55,669 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:32:55,698 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:32:55,698 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:32:55,698 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:32:55,698 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:32:55,699 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:32:55,699 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:32:55,699 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:32:55,699 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:32:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-12 15:32:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 15:32:55,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:32:55,733 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] [2020-10-12 15:32:55,734 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:32:55,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:32:55,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1114262460, now seen corresponding path program 1 times [2020-10-12 15:32:55,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:32:55,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027109595] [2020-10-12 15:32:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:32:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:55,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:56,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:56,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:56,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 15:32:56,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:32:56,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-12 15:32:56,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:56,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 15:32:56,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 15:32:56,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 15:32:56,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 15:32:56,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:32:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:56,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:56,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:56,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:32:56,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:56,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:32:56,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:56,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:56,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:32:56,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:56,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:32:56,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 15:32:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:56,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:56,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:56,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:56,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-12 15:32:56,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:32:56,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 15:32:56,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:56,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:56,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 15:32:56,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:56,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:32:56,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-12 15:32:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:32:56,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:32:56,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:32:56,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:32:56,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:32:56,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:32:56,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:32:56,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:32:56,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 15:32:56,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:32:56,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:32:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:32:56,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027109595] [2020-10-12 15:32:56,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:32:56,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 15:32:56,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017088258] [2020-10-12 15:32:56,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 15:32:56,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:32:56,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 15:32:56,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:32:56,453 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 5 states. [2020-10-12 15:32:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:32:56,881 INFO L93 Difference]: Finished difference Result 103 states and 146 transitions. [2020-10-12 15:32:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 15:32:56,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-12 15:32:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:32:56,893 INFO L225 Difference]: With dead ends: 103 [2020-10-12 15:32:56,894 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 15:32:56,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:32:56,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 15:32:56,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-12 15:32:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 15:32:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-10-12 15:32:56,946 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 23 [2020-10-12 15:32:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:32:56,947 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-10-12 15:32:56,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 15:32:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-10-12 15:32:56,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:32:56,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:32:56,949 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] [2020-10-12 15:32:56,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:32:56,950 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:32:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:32:56,950 INFO L82 PathProgramCache]: Analyzing trace with hash -578773628, now seen corresponding path program 1 times [2020-10-12 15:32:56,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:32:56,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197478679] [2020-10-12 15:32:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:32:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 15:32:57,031 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 15:32:57,032 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 15:32:57,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:32:57,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 03:32:57 BoogieIcfgContainer [2020-10-12 15:32:57,080 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 15:32:57,084 INFO L168 Benchmark]: Toolchain (without parser) took 2460.78 ms. Allocated memory was 137.9 MB in the beginning and 232.3 MB in the end (delta: 94.4 MB). Free memory was 100.6 MB in the beginning and 159.8 MB in the end (delta: -59.2 MB). Peak memory consumption was 35.1 MB. Max. memory is 7.1 GB. [2020-10-12 15:32:57,086 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 119.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-12 15:32:57,087 INFO L168 Benchmark]: CACSL2BoogieTranslator took 463.64 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 100.2 MB in the beginning and 177.2 MB in the end (delta: -77.0 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-10-12 15:32:57,088 INFO L168 Benchmark]: Boogie Preprocessor took 56.21 ms. Allocated memory is still 201.9 MB. Free memory was 177.2 MB in the beginning and 175.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-12 15:32:57,089 INFO L168 Benchmark]: RCFGBuilder took 475.20 ms. Allocated memory is still 201.9 MB. Free memory was 175.2 MB in the beginning and 148.2 MB in the end (delta: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. [2020-10-12 15:32:57,091 INFO L168 Benchmark]: TraceAbstraction took 1458.34 ms. Allocated memory was 201.9 MB in the beginning and 232.3 MB in the end (delta: 30.4 MB). Free memory was 148.2 MB in the beginning and 159.8 MB in the end (delta: -11.6 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-10-12 15:32:57,102 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 119.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 463.64 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 100.2 MB in the beginning and 177.2 MB in the end (delta: -77.0 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.21 ms. Allocated memory is still 201.9 MB. Free memory was 177.2 MB in the beginning and 175.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 475.20 ms. Allocated memory is still 201.9 MB. Free memory was 175.2 MB in the beginning and 148.2 MB in the end (delta: 27.0 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1458.34 ms. Allocated memory was 201.9 MB in the beginning and 232.3 MB in the end (delta: 30.4 MB). Free memory was 148.2 MB in the beginning and 159.8 MB in the end (delta: -11.6 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 140]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 111, overapproximation of bitwiseAnd at line 43, overapproximation of someBinaryArithmeticFLOAToperation at line 44. Possible FailurePath: [L24-L28] static const float ln2_hi_log = 6.9313812256e-01, ln2_lo_log = 9.0580006145e-06, two25_log = 3.355443200e+07, Lg1_log = 6.6666668653e-01, Lg2_log = 4.0000000596e-01, Lg3_log = 2.8571429849e-01, Lg4_log = 2.2222198546e-01, Lg5_log = 1.8183572590e-01, Lg6_log = 1.5313838422e-01, Lg7_log = 1.4798198640e-01; [L30] static const float zero_log = 0.0; [L132] float x = __VERIFIER_nondet_float(); [L134] EXPR x < 0 && isfinite_float(x) [L134] CALL, EXPR isfinite_float(x) [L115] __int32_t ix; [L117] ieee_float_shape_type gf_u; [L118] gf_u.value = (x) [L119] EXPR gf_u.word [L119] (ix) = gf_u.word [L121] ix &= 0x7fffffff [L122] return (((ix) < 0x7f800000L)); [L134] RET, EXPR isfinite_float(x) [L134] EXPR x < 0 && isfinite_float(x) [L134] COND TRUE (x < 0 && isfinite_float(x)) [L136] CALL, EXPR __ieee754_logf(x) [L33] float hfsq, f, s, z, R, w, t1, t2, dk; [L34] __int32_t k, ix, i, j; [L37] ieee_float_shape_type gf_u; [L38] gf_u.value = (x) [L39] EXPR gf_u.word [L39] (ix) = gf_u.word [L42] k = 0 [L43] COND TRUE ((ix & 0x7fffffff) == 0) [L44] return -two25_log / zero_log; [L136] RET, EXPR __ieee754_logf(x) [L136] float res = __ieee754_logf(x); [L139] CALL, EXPR isnan_float(res) [L111] return x != x; [L139] RET, EXPR isnan_float(res) [L139] COND TRUE !isnan_float(res) [L140] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 56 SDtfs, 60 SDslu, 14 SDs, 0 SdLazy, 120 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s 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, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 55 NumberOfCodeBlocks, 55 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 1694 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...