/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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_1032b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:05:23,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:05:23,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:05:23,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:05:23,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:05:23,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:05:23,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:05:23,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:05:23,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:05:23,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:05:23,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:05:23,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:05:23,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:05:23,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:05:23,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:05:23,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:05:23,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:05:23,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:05:23,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:05:23,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:05:23,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:05:23,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:05:23,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:05:23,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:05:23,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:05:23,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:05:23,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:05:23,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:05:23,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:05:23,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:05:23,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:05:23,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:05:23,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:05:23,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:05:23,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:05:23,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:05:23,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:05:23,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:05:23,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:05:23,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:05:23,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:05:23,738 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 [2020-09-25 11:05:23,767 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:05:23,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:05:23,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:05:23,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:05:23,769 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:05:23,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:05:23,769 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:05:23,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:05:23,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:05:23,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:05:23,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:05:23,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:05:23,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:05:23,771 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:05:23,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:05:23,771 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:05:23,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:05:23,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:05:23,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:05:23,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:05:23,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:05:23,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:05:23,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:05:23,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:05:23,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:05:23,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:05:23,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:05:23,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:05:23,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:05:23,774 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:05:24,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:05:24,297 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:05:24,304 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:05:24,306 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:05:24,308 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:05:24,309 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-09-25 11:05:24,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee12d281d/68b0220e8e6c4aeb82dc61118cc7f3ea/FLAG818046762 [2020-09-25 11:05:24,945 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:05:24,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-09-25 11:05:24,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee12d281d/68b0220e8e6c4aeb82dc61118cc7f3ea/FLAG818046762 [2020-09-25 11:05:25,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee12d281d/68b0220e8e6c4aeb82dc61118cc7f3ea [2020-09-25 11:05:25,290 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:05:25,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:05:25,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:05:25,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:05:25,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:05:25,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:05:25" (1/1) ... [2020-09-25 11:05:25,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fbfd6df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:25, skipping insertion in model container [2020-09-25 11:05:25,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:05:25" (1/1) ... [2020-09-25 11:05:25,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:05:25,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:05:25,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:05:25,596 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:05:25,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:05:25,662 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:05:25,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:25 WrapperNode [2020-09-25 11:05:25,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:05:25,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:05:25,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:05:25,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:05:25,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:25" (1/1) ... [2020-09-25 11:05:25,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:25" (1/1) ... [2020-09-25 11:05:25,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:25" (1/1) ... [2020-09-25 11:05:25,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:25" (1/1) ... [2020-09-25 11:05:25,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:25" (1/1) ... [2020-09-25 11:05:25,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:25" (1/1) ... [2020-09-25 11:05:25,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:25" (1/1) ... [2020-09-25 11:05:25,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:05:25,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:05:25,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:05:25,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:05:25,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:25" (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 [2020-09-25 11:05:25,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:05:25,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:05:25,872 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-09-25 11:05:25,872 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-25 11:05:25,872 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:05:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:05:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-25 11:05:25,874 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-09-25 11:05:25,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 11:05:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-25 11:05:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 11:05:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 11:05:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 11:05:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-25 11:05:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-25 11:05:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:05:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:05:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:05:26,288 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:05:26,288 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-25 11:05:26,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:05:26 BoogieIcfgContainer [2020-09-25 11:05:26,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:05:26,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:05:26,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:05:26,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:05:26,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:05:25" (1/3) ... [2020-09-25 11:05:26,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab5a254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:05:26, skipping insertion in model container [2020-09-25 11:05:26,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:05:25" (2/3) ... [2020-09-25 11:05:26,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab5a254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:05:26, skipping insertion in model container [2020-09-25 11:05:26,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:05:26" (3/3) ... [2020-09-25 11:05:26,303 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032b.c [2020-09-25 11:05:26,314 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:05:26,324 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:05:26,347 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:05:26,375 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:05:26,376 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:05:26,376 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:05:26,376 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:05:26,376 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:05:26,376 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:05:26,377 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:05:26,377 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:05:26,399 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-09-25 11:05:26,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 11:05:26,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:05:26,409 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] [2020-09-25 11:05:26,409 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:05:26,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:05:26,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1398005522, now seen corresponding path program 1 times [2020-09-25 11:05:26,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:05:26,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701156144] [2020-09-25 11:05:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:05:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:05:26,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:26,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:05:26,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 11:05:26,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:05:26,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-09-25 11:05:26,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:05:26,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:05:26,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:05:26,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 11:05:26,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:05:26,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 11:05:26,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:05:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:05:26,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:26,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:05:26,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 11:05:26,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:05:26,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 11:05:26,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:05:26,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:05:26,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:05:26,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:05:26,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:05:26,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:05:26,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-25 11:05:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:05:26,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:05:26,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:05:26,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-25 11:05:26,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:05:26,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-25 11:05:26,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:05:26,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:05:26,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:05:26,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-25 11:05:26,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:05:26,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:05:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:05:26,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701156144] [2020-09-25 11:05:26,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:05:26,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:05:26,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779903622] [2020-09-25 11:05:27,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:05:27,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:05:27,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:05:27,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:05:27,023 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 4 states. [2020-09-25 11:05:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:05:27,291 INFO L93 Difference]: Finished difference Result 155 states and 180 transitions. [2020-09-25 11:05:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 11:05:27,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-09-25 11:05:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:05:27,308 INFO L225 Difference]: With dead ends: 155 [2020-09-25 11:05:27,308 INFO L226 Difference]: Without dead ends: 76 [2020-09-25 11:05:27,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:05:27,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-25 11:05:27,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-25 11:05:27,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 11:05:27,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-09-25 11:05:27,373 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 27 [2020-09-25 11:05:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:05:27,373 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-09-25 11:05:27,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:05:27,374 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-09-25 11:05:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 11:05:27,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:05:27,376 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] [2020-09-25 11:05:27,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:05:27,377 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:05:27,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:05:27,378 INFO L82 PathProgramCache]: Analyzing trace with hash -687584586, now seen corresponding path program 1 times [2020-09-25 11:05:27,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:05:27,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506685169] [2020-09-25 11:05:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:05:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 11:05:27,420 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 11:05:27,420 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 11:05:27,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:05:27,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 11:05:27 BoogieIcfgContainer [2020-09-25 11:05:27,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 11:05:27,452 INFO L168 Benchmark]: Toolchain (without parser) took 2158.77 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 100.7 MB in the beginning and 94.2 MB in the end (delta: 6.5 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. [2020-09-25 11:05:27,454 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 11:05:27,455 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.30 ms. Allocated memory is still 138.4 MB. Free memory was 100.1 MB in the beginning and 88.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-09-25 11:05:27,456 INFO L168 Benchmark]: Boogie Preprocessor took 132.42 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 88.6 MB in the beginning and 178.5 MB in the end (delta: -89.9 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-25 11:05:27,457 INFO L168 Benchmark]: RCFGBuilder took 497.22 ms. Allocated memory is still 200.8 MB. Free memory was 178.5 MB in the beginning and 155.0 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-09-25 11:05:27,458 INFO L168 Benchmark]: TraceAbstraction took 1153.11 ms. Allocated memory is still 200.8 MB. Free memory was 154.3 MB in the beginning and 94.2 MB in the end (delta: 60.1 MB). Peak memory consumption was 60.1 MB. Max. memory is 7.1 GB. [2020-09-25 11:05:27,463 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 362.30 ms. Allocated memory is still 138.4 MB. Free memory was 100.1 MB in the beginning and 88.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.42 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 88.6 MB in the beginning and 178.5 MB in the end (delta: -89.9 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 497.22 ms. Allocated memory is still 200.8 MB. Free memory was 178.5 MB in the beginning and 155.0 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1153.11 ms. Allocated memory is still 200.8 MB. Free memory was 154.3 MB in the beginning and 94.2 MB in the end (delta: 60.1 MB). Peak memory consumption was 60.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 80]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 79, overapproximation of bitwiseAnd at line 23, overapproximation of someUnaryFLOAToperation at line 75, overapproximation of someBinaryArithmeticFLOAToperation at line 43. Possible FailurePath: [L75] float x = -0.0f; [L76] CALL, EXPR round_float(x) [L13] __uint32_t w; [L15] int exponent_less_127; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 [L25] COND FALSE !(exponent_less_127 < 23) [L41] COND TRUE exponent_less_127 == 128 [L43] return x + x; [L76] RET, EXPR round_float(x) [L76] float res = round_float(x); [L79] EXPR res == -0.0f && __signbit_float(res) == 1 [L79] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L80] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 84 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: 85 SDtfs, 13 SDslu, 64 SDs, 0 SdLazy, 94 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred 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, 0.4s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 1222 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...