/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/floats-cbmc-regression/float22.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:20:34,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:20:34,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:20:34,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:20:34,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:20:34,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:20:34,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:20:34,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:20:34,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:20:34,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:20:34,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:20:34,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:20:34,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:20:34,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:20:34,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:20:34,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:20:34,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:20:34,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:20:34,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:20:34,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:20:34,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:20:34,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:20:34,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:20:34,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:20:34,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:20:34,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:20:34,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:20:34,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:20:34,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:20:34,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:20:34,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:20:34,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:20:34,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:20:34,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:20:34,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:20:34,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:20:34,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:20:34,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:20:34,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:20:34,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:20:34,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:20:34,615 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 10:20:34,645 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:20:34,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:20:34,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:20:34,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:20:34,647 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:20:34,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:20:34,647 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:20:34,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:20:34,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:20:34,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:20:34,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:20:34,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:20:34,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:20:34,648 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:20:34,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:20:34,648 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:20:34,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:20:34,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:20:34,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:20:34,649 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:20:34,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:20:34,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:20:34,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:20:34,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:20:34,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:20:34,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:20:34,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:20:34,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:20:34,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:20:34,654 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 10:20:35,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:20:35,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:20:35,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:20:35,033 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:20:35,033 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:20:35,034 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-cbmc-regression/float22.i [2020-10-13 10:20:35,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d790e327b/09cdd485f175471da723fd0c510b622e/FLAG71b8a517c [2020-10-13 10:20:35,522 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:20:35,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/floats-cbmc-regression/float22.i [2020-10-13 10:20:35,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d790e327b/09cdd485f175471da723fd0c510b622e/FLAG71b8a517c [2020-10-13 10:20:35,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d790e327b/09cdd485f175471da723fd0c510b622e [2020-10-13 10:20:35,882 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:20:35,884 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:20:35,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:20:35,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:20:35,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:20:35,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:20:35" (1/1) ... [2020-10-13 10:20:35,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c2d0e9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:35, skipping insertion in model container [2020-10-13 10:20:35,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:20:35" (1/1) ... [2020-10-13 10:20:35,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:20:35,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:20:36,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:20:36,160 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:20:36,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:20:36,224 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:20:36,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:36 WrapperNode [2020-10-13 10:20:36,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:20:36,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:20:36,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:20:36,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:20:36,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:36" (1/1) ... [2020-10-13 10:20:36,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:36" (1/1) ... [2020-10-13 10:20:36,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:36" (1/1) ... [2020-10-13 10:20:36,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:36" (1/1) ... [2020-10-13 10:20:36,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:36" (1/1) ... [2020-10-13 10:20:36,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:36" (1/1) ... [2020-10-13 10:20:36,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:36" (1/1) ... [2020-10-13 10:20:36,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:20:36,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:20:36,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:20:36,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:20:36,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:36" (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 10:20:36,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:20:36,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:20:36,443 INFO L138 BoogieDeclarations]: Found implementation of procedure returnsField [2020-10-13 10:20:36,443 INFO L138 BoogieDeclarations]: Found implementation of procedure returnsStructure [2020-10-13 10:20:36,443 INFO L138 BoogieDeclarations]: Found implementation of procedure testOne [2020-10-13 10:20:36,444 INFO L138 BoogieDeclarations]: Found implementation of procedure testTwo [2020-10-13 10:20:36,444 INFO L138 BoogieDeclarations]: Found implementation of procedure testThree [2020-10-13 10:20:36,444 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:20:36,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:20:36,444 INFO L130 BoogieDeclarations]: Found specification of procedure returnsField [2020-10-13 10:20:36,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:20:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:20:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-13 10:20:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:20:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure returnsStructure [2020-10-13 10:20:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:20:36,445 INFO L130 BoogieDeclarations]: Found specification of procedure testOne [2020-10-13 10:20:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-13 10:20:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure testTwo [2020-10-13 10:20:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure testThree [2020-10-13 10:20:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:20:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:20:36,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:20:36,951 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:20:36,952 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 10:20:36,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:20:36 BoogieIcfgContainer [2020-10-13 10:20:36,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:20:36,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:20:36,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:20:36,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:20:36,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:20:35" (1/3) ... [2020-10-13 10:20:36,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5329e7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:20:36, skipping insertion in model container [2020-10-13 10:20:36,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:36" (2/3) ... [2020-10-13 10:20:36,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5329e7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:20:36, skipping insertion in model container [2020-10-13 10:20:36,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:20:36" (3/3) ... [2020-10-13 10:20:36,971 INFO L109 eAbstractionObserver]: Analyzing ICFG float22.i [2020-10-13 10:20:36,983 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:20:36,991 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-10-13 10:20:37,005 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-13 10:20:37,033 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:20:37,033 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:20:37,033 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:20:37,034 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:20:37,034 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:20:37,034 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:20:37,034 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:20:37,034 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:20:37,058 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-10-13 10:20:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:20:37,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:20:37,066 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:20:37,067 INFO L427 AbstractCegarLoop]: === Iteration 1 === [testOneErr0ASSERT_VIOLATIONERROR_FUNCTION, testThreeErr0ASSERT_VIOLATIONERROR_FUNCTION, testTwoErr0ASSERT_VIOLATIONERROR_FUNCTION, testTwoErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:20:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:20:37,074 INFO L82 PathProgramCache]: Analyzing trace with hash -250275214, now seen corresponding path program 1 times [2020-10-13 10:20:37,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:20:37,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819534481] [2020-10-13 10:20:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:20:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 10:20:37,304 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 10:20:37,305 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 10:20:37,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:20:37,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:20:37 BoogieIcfgContainer [2020-10-13 10:20:37,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:20:37,332 INFO L168 Benchmark]: Toolchain (without parser) took 1447.28 ms. Allocated memory was 149.4 MB in the beginning and 204.5 MB in the end (delta: 55.1 MB). Free memory was 105.2 MB in the beginning and 137.8 MB in the end (delta: -32.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-10-13 10:20:37,333 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 149.4 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-13 10:20:37,334 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.58 ms. Allocated memory is still 149.4 MB. Free memory was 105.0 MB in the beginning and 93.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-10-13 10:20:37,335 INFO L168 Benchmark]: Boogie Preprocessor took 150.83 ms. Allocated memory was 149.4 MB in the beginning and 204.5 MB in the end (delta: 55.1 MB). Free memory was 93.2 MB in the beginning and 181.2 MB in the end (delta: -88.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-10-13 10:20:37,336 INFO L168 Benchmark]: RCFGBuilder took 580.47 ms. Allocated memory is still 204.5 MB. Free memory was 181.2 MB in the beginning and 154.3 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2020-10-13 10:20:37,337 INFO L168 Benchmark]: TraceAbstraction took 365.12 ms. Allocated memory is still 204.5 MB. Free memory was 153.7 MB in the beginning and 137.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2020-10-13 10:20:37,341 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 149.4 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 340.58 ms. Allocated memory is still 149.4 MB. Free memory was 105.0 MB in the beginning and 93.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 150.83 ms. Allocated memory was 149.4 MB in the beginning and 204.5 MB in the end (delta: 55.1 MB). Free memory was 93.2 MB in the beginning and 181.2 MB in the end (delta: -88.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 580.47 ms. Allocated memory is still 204.5 MB. Free memory was 181.2 MB in the beginning and 154.3 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 365.12 ms. Allocated memory is still 204.5 MB. Free memory was 153.7 MB in the beginning and 137.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 133]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseAnd at line 119. Possible FailurePath: [L168] CALL testOne() [L128] ieee754_float f1, f2; [L130] CALL, EXPR returnsStructure(0) [L117] ieee754_float c; [L119] c.ieee.negative = index & 0x1 [L120] c.ieee.exponent = 0 [L121] c.ieee.mantissa = 0 [L123] return c; [L123] return c; [L130] RET, EXPR returnsStructure(0) [L130] f1 = returnsStructure(0) [L131] CALL, EXPR returnsStructure(1) [L117] ieee754_float c; [L119] c.ieee.negative = index & 0x1 [L120] c.ieee.exponent = 0 [L121] c.ieee.mantissa = 0 [L123] return c; [L123] return c; [L131] RET, EXPR returnsStructure(1) [L131] f2 = returnsStructure(1) [L133] EXPR f1.ieee.negative [L133] EXPR f2.ieee.negative [L133] COND TRUE !(f1.ieee.negative != f2.ieee.negative) [L133] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 59 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...