/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:37:24,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:37:24,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:37:24,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:37:24,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:37:24,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:37:24,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:37:24,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:37:24,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:37:24,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:37:24,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:37:24,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:37:24,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:37:24,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:37:24,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:37:24,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:37:24,712 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:37:24,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:37:24,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:37:24,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:37:24,719 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:37:24,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:37:24,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:37:24,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:37:24,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:37:24,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:37:24,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:37:24,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:37:24,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:37:24,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:37:24,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:37:24,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:37:24,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:37:24,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:37:24,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:37:24,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:37:24,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:37:24,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:37:24,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:37:24,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:37:24,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:37:24,738 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 22:37:24,771 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:37:24,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:37:24,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:37:24,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:37:24,775 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:37:24,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:37:24,776 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:37:24,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:37:24,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:37:24,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:37:24,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:37:24,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:37:24,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:37:24,779 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:37:24,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:37:24,779 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:37:24,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:37:24,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:37:24,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:37:24,781 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:37:24,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:37:24,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:37:24,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:37:24,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:37:24,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:37:24,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:37:24,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:37:24,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:37:24,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:37:24,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:37:25,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:37:25,343 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:37:25,348 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:37:25,350 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:37:25,351 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:37:25,352 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c [2020-09-24 22:37:25,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43fed7a6d/12004e1f2a92421090d647ae63a85404/FLAG263f4587f [2020-09-24 22:37:26,021 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:37:26,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c [2020-09-24 22:37:26,032 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43fed7a6d/12004e1f2a92421090d647ae63a85404/FLAG263f4587f [2020-09-24 22:37:26,358 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43fed7a6d/12004e1f2a92421090d647ae63a85404 [2020-09-24 22:37:26,373 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:37:26,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:37:26,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:37:26,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:37:26,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:37:26,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:37:26" (1/1) ... [2020-09-24 22:37:26,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5500f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:26, skipping insertion in model container [2020-09-24 22:37:26,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:37:26" (1/1) ... [2020-09-24 22:37:26,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:37:26,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:37:26,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:37:26,687 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:37:26,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:37:26,841 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:37:26,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:26 WrapperNode [2020-09-24 22:37:26,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:37:26,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:37:26,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:37:26,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:37:26,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:26" (1/1) ... [2020-09-24 22:37:26,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:26" (1/1) ... [2020-09-24 22:37:26,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:26" (1/1) ... [2020-09-24 22:37:26,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:26" (1/1) ... [2020-09-24 22:37:26,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:26" (1/1) ... [2020-09-24 22:37:26,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:26" (1/1) ... [2020-09-24 22:37:26,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:26" (1/1) ... [2020-09-24 22:37:26,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:37:26,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:37:26,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:37:26,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:37:26,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:37:26,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:37:26,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:37:26,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ceil_float [2020-09-24 22:37:26,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-24 22:37:26,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:37:26,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:37:26,989 INFO L130 BoogieDeclarations]: Found specification of procedure ceil_float [2020-09-24 22:37:26,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 22:37:26,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-24 22:37:26,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 22:37:26,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 22:37:26,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 22:37:26,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-24 22:37:26,990 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-24 22:37:26,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:37:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:37:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:37:27,394 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:37:27,394 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-24 22:37:27,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:37:27 BoogieIcfgContainer [2020-09-24 22:37:27,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:37:27,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:37:27,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:37:27,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:37:27,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:37:26" (1/3) ... [2020-09-24 22:37:27,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f80758d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:37:27, skipping insertion in model container [2020-09-24 22:37:27,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:26" (2/3) ... [2020-09-24 22:37:27,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f80758d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:37:27, skipping insertion in model container [2020-09-24 22:37:27,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:37:27" (3/3) ... [2020-09-24 22:37:27,409 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1092a.c [2020-09-24 22:37:27,424 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:37:27,433 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:37:27,455 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:37:27,484 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:37:27,485 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:37:27,485 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:37:27,485 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:37:27,485 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:37:27,485 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:37:27,485 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:37:27,485 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:37:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2020-09-24 22:37:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 22:37:27,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:37:27,521 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] [2020-09-24 22:37:27,521 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:37:27,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:37:27,528 INFO L82 PathProgramCache]: Analyzing trace with hash 818160258, now seen corresponding path program 1 times [2020-09-24 22:37:27,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:37:27,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973601539] [2020-09-24 22:37:27,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:37:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:37:27,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:37:27,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:37:27,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 22:37:27,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:37:27,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-09-24 22:37:27,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:37:27,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:37:27,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-24 22:37:27,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:37:27,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 22:37:27,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:37:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:37:27,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:37:27,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:37:27,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 22:37:27,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:37:27,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 22:37:27,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:37:27,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:37:27,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:37:27,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:37:27,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:37:27,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-24 22:37:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:37:27,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:37:28,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:37:28,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 22:37:28,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:37:28,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 22:37:28,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:37:28,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:37:28,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 22:37:28,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:37:28,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:37:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:37:28,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973601539] [2020-09-24 22:37:28,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:37:28,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:37:28,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596294952] [2020-09-24 22:37:28,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:37:28,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:37:28,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:37:28,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:37:28,054 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 4 states. [2020-09-24 22:37:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:37:28,366 INFO L93 Difference]: Finished difference Result 168 states and 201 transitions. [2020-09-24 22:37:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:37:28,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-09-24 22:37:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:37:28,384 INFO L225 Difference]: With dead ends: 168 [2020-09-24 22:37:28,384 INFO L226 Difference]: Without dead ends: 84 [2020-09-24 22:37:28,390 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 [2020-09-24 22:37:28,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-24 22:37:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-09-24 22:37:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 22:37:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2020-09-24 22:37:28,457 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 31 [2020-09-24 22:37:28,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:37:28,458 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2020-09-24 22:37:28,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:37:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2020-09-24 22:37:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 22:37:28,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:37:28,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:37:28,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:37:28,461 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:37:28,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:37:28,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1168745686, now seen corresponding path program 1 times [2020-09-24 22:37:28,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:37:28,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553510942] [2020-09-24 22:37:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:37:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 22:37:28,514 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 22:37:28,515 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 22:37:28,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:37:28,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 10:37:28 BoogieIcfgContainer [2020-09-24 22:37:28,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 22:37:28,547 INFO L168 Benchmark]: Toolchain (without parser) took 2170.63 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 100.7 MB in the beginning and 85.8 MB in the end (delta: 14.9 MB). Peak memory consumption was 78.4 MB. Max. memory is 7.1 GB. [2020-09-24 22:37:28,549 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 22:37:28,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 457.49 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 100.0 MB in the beginning and 179.0 MB in the end (delta: -78.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-09-24 22:37:28,551 INFO L168 Benchmark]: Boogie Preprocessor took 70.20 ms. Allocated memory is still 200.3 MB. Free memory was 179.0 MB in the beginning and 176.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-24 22:37:28,552 INFO L168 Benchmark]: RCFGBuilder took 485.97 ms. Allocated memory is still 200.3 MB. Free memory was 176.3 MB in the beginning and 151.9 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-09-24 22:37:28,552 INFO L168 Benchmark]: TraceAbstraction took 1141.81 ms. Allocated memory is still 200.3 MB. Free memory was 151.2 MB in the beginning and 85.8 MB in the end (delta: 65.4 MB). Peak memory consumption was 65.4 MB. Max. memory is 7.1 GB. [2020-09-24 22:37:28,556 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 457.49 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 100.0 MB in the beginning and 179.0 MB in the end (delta: -78.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.20 ms. Allocated memory is still 200.3 MB. Free memory was 179.0 MB in the beginning and 176.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 485.97 ms. Allocated memory is still 200.3 MB. Free memory was 176.3 MB in the beginning and 151.9 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1141.81 ms. Allocated memory is still 200.3 MB. Free memory was 151.2 MB in the beginning and 85.8 MB in the end (delta: 65.4 MB). Peak memory consumption was 65.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 81]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of bitwiseAnd at line 21, overapproximation of someUnaryFLOAToperation at line 76, overapproximation of someBinaryArithmeticFLOAToperation at line 44. Possible FailurePath: [L11] static const float huge_ceil = 1.0e30; [L76] float x = -0.0f; [L77] CALL, EXPR ceil_float(x) [L14] __int32_t i0, j0; [L15] __uint32_t i, ix; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (i0) = gf_u.word [L21] ix = (i0 & 0x7fffffff) [L22] j0 = (ix >> 23) - 0x7f [L23] COND FALSE !(j0 < 23) [L43] COND TRUE !((ix) < 0x7f800000L) [L44] return x + x; [L77] RET, EXPR ceil_float(x) [L77] float res = ceil_float(x); [L80] EXPR res == -0.0f && __signbit_float(res) == 1 [L80] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L81] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 92 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: 97 SDtfs, 17 SDslu, 73 SDs, 0 SdLazy, 105 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, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred 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, 71 NumberOfCodeBlocks, 71 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 1620 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...