/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-benchs/filter_iir.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:15:19,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:15:19,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:15:19,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:15:19,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:15:19,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:15:19,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:15:19,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:15:19,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:15:19,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:15:19,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:15:19,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:15:19,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:15:19,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:15:19,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:15:19,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:15:19,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:15:19,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:15:19,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:15:19,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:15:19,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:15:19,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:15:19,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:15:19,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:15:19,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:15:19,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:15:19,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:15:19,817 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:15:19,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:15:19,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:15:19,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:15:19,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:15:19,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:15:19,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:15:19,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:15:19,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:15:19,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:15:19,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:15:19,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:15:19,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:15:19,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:15:19,827 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 10:15:19,863 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:15:19,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:15:19,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:15:19,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:15:19,865 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:15:19,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:15:19,866 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:15:19,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:15:19,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:15:19,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:15:19,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:15:19,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:15:19,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:15:19,869 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:15:19,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:15:19,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:15:19,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:15:19,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:15:19,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:15:19,871 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:15:19,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:15:19,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:15:19,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:15:19,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:15:19,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:15:19,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:15:19,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:15:19,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:15:19,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:15:19,873 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 10:15:20,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:15:20,290 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:15:20,297 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:15:20,300 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:15:20,300 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:15:20,301 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/filter_iir.c [2020-10-13 10:15:20,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6703b4c6e/f52104ee56984a98ae784461172d2a4e/FLAG9d746d170 [2020-10-13 10:15:20,932 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:15:20,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/filter_iir.c [2020-10-13 10:15:20,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6703b4c6e/f52104ee56984a98ae784461172d2a4e/FLAG9d746d170 [2020-10-13 10:15:21,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6703b4c6e/f52104ee56984a98ae784461172d2a4e [2020-10-13 10:15:21,254 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:15:21,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:15:21,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:15:21,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:15:21,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:15:21,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:15:21" (1/1) ... [2020-10-13 10:15:21,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e09f978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:21, skipping insertion in model container [2020-10-13 10:15:21,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:15:21" (1/1) ... [2020-10-13 10:15:21,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:15:21,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:15:21,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:15:21,511 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:15:21,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:15:21,661 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:15:21,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:21 WrapperNode [2020-10-13 10:15:21,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:15:21,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:15:21,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:15:21,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:15:21,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:21" (1/1) ... [2020-10-13 10:15:21,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:21" (1/1) ... [2020-10-13 10:15:21,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:21" (1/1) ... [2020-10-13 10:15:21,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:21" (1/1) ... [2020-10-13 10:15:21,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:21" (1/1) ... [2020-10-13 10:15:21,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:21" (1/1) ... [2020-10-13 10:15:21,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:21" (1/1) ... [2020-10-13 10:15:21,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:15:21,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:15:21,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:15:21,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:15:21,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:21" (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 10:15:21,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:15:21,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:15:21,795 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:15:21,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:15:21,796 INFO L138 BoogieDeclarations]: Found implementation of procedure iir4 [2020-10-13 10:15:21,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:15:21,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:15:21,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-13 10:15:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:15:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:15:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:15:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure iir4 [2020-10-13 10:15:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-13 10:15:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-13 10:15:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:15:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:15:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:15:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-10-13 10:15:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:15:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:15:22,202 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:15:22,203 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:15:22,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:15:22 BoogieIcfgContainer [2020-10-13 10:15:22,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:15:22,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:15:22,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:15:22,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:15:22,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:15:21" (1/3) ... [2020-10-13 10:15:22,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583c3821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:15:22, skipping insertion in model container [2020-10-13 10:15:22,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:15:21" (2/3) ... [2020-10-13 10:15:22,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583c3821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:15:22, skipping insertion in model container [2020-10-13 10:15:22,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:15:22" (3/3) ... [2020-10-13 10:15:22,227 INFO L109 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2020-10-13 10:15:22,250 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:15:22,259 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:15:22,271 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:15:22,295 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:15:22,296 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:15:22,296 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:15:22,296 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:15:22,296 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:15:22,296 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:15:22,296 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:15:22,297 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:15:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 10:15:22,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:15:22,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:22,326 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] [2020-10-13 10:15:22,327 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:22,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:22,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1833483833, now seen corresponding path program 1 times [2020-10-13 10:15:22,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:22,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012690024] [2020-10-13 10:15:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:22,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:22,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:22,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:15:22,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:22,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-13 10:15:22,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:15:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:22,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:15:23,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:15:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:23,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:23,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:23,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:23,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:23,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 10:15:23,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:23,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:23,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:15:23,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:23,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:23,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:15:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:23,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:23,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:23,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:15:23,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:23,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:15:23,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:23,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:23,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 10:15:23,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:23,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:23,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-13 10:15:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:15:23,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:15:23,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:15:23,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:15:23,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:15:23,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:15:23,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:15:23,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:15:23,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:15:23,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:15:23,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:15:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:15:23,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012690024] [2020-10-13 10:15:23,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:15:23,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:15:23,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139987702] [2020-10-13 10:15:23,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:15:23,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:15:23,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:15:23,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:15:23,167 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-10-13 10:15:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:15:23,424 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2020-10-13 10:15:23,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:15:23,426 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-13 10:15:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:15:23,435 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:15:23,436 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 10:15:23,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:15:23,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 10:15:23,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 10:15:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 10:15:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 10:15:23,491 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2020-10-13 10:15:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:15:23,491 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 10:15:23,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:15:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 10:15:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:15:23,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:15:23,493 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] [2020-10-13 10:15:23,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:15:23,494 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:15:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:15:23,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1450366213, now seen corresponding path program 1 times [2020-10-13 10:15:23,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:15:23,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593999501] [2020-10-13 10:15:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:15:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 10:15:23,541 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 10:15:23,541 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 10:15:23,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:15:23,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:15:23 BoogieIcfgContainer [2020-10-13 10:15:23,571 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:15:23,575 INFO L168 Benchmark]: Toolchain (without parser) took 2317.85 ms. Allocated memory was 138.9 MB in the beginning and 235.4 MB in the end (delta: 96.5 MB). Free memory was 102.0 MB in the beginning and 180.3 MB in the end (delta: -78.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:23,576 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-13 10:15:23,577 INFO L168 Benchmark]: CACSL2BoogieTranslator took 405.31 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 101.8 MB in the beginning and 180.6 MB in the end (delta: -78.8 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:23,578 INFO L168 Benchmark]: Boogie Preprocessor took 56.56 ms. Allocated memory is still 202.9 MB. Free memory was 180.6 MB in the beginning and 178.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:23,579 INFO L168 Benchmark]: RCFGBuilder took 487.70 ms. Allocated memory is still 202.9 MB. Free memory was 178.6 MB in the beginning and 156.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:23,580 INFO L168 Benchmark]: TraceAbstraction took 1362.52 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 156.0 MB in the beginning and 180.3 MB in the end (delta: -24.3 MB). Peak memory consumption was 8.2 MB. Max. memory is 7.1 GB. [2020-10-13 10:15:23,585 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 405.31 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 101.8 MB in the beginning and 180.6 MB in the end (delta: -78.8 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.56 ms. Allocated memory is still 202.9 MB. Free memory was 180.6 MB in the beginning and 178.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 487.70 ms. Allocated memory is still 202.9 MB. Free memory was 178.6 MB in the beginning and 156.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1362.52 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 156.0 MB in the beginning and 180.3 MB in the end (delta: -24.3 MB). Peak memory consumption was 8.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 11]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 52, overapproximation of to_real at line 14, overapproximation of someBinaryArithmeticDOUBLEoperation at line 26. Possible FailurePath: [L14] double A1[3] = { 1, 0.5179422053046, 1.0 }; [L15] double b1[2] = { 1.470767736573, 0.5522073405779 }; [L16] double A2[3] = { 1, 1.633101801841, 1.0 }; [L17] double b2[2] = { 1.742319554830, 0.820939679242 }; [L19] double D1[2], D2[2]; [L20] double P, X; [L41] D1[0] = 0. [L41] D1[1] = 0. [L42] D2[0] = 0. [L42] D2[1] = 0. [L43] P = 0. [L45] COND TRUE 1 [L47] X = __VERIFIER_nondet_double() [L48] EXPR \read(X) [L48] EXPR X >= -10. && X <= 10. [L48] EXPR \read(X) [L48] EXPR X >= -10. && X <= 10. [L48] CALL assume_abort_if_not(X >= -10. && X <= 10.) [L9] COND FALSE !(!cond) [L48] RET assume_abort_if_not(X >= -10. && X <= 10.) [L50] CALL iir4(&X, &P) [L24] double x1, y1, t1, t2; [L26] EXPR \read(*x) [L26] x1 = 0.0117749388721091 * *x [L28] EXPR b1[0] [L28] EXPR D1[0] [L28] EXPR b1[1] [L28] EXPR D1[1] [L28] t1 = x1 + b1[0]*D1[0] - b1[1]*D1[1] [L29] EXPR A1[0] [L29] EXPR A1[1] [L29] EXPR D1[0] [L29] EXPR A1[2] [L29] EXPR D1[1] [L29] y1 = A1[0]*t1 - A1[1]*D1[0] + A1[2]*D1[1] [L30] EXPR D1[0] [L30] D1[1] = D1[0] [L31] D1[0] = t1 [L33] EXPR b2[0] [L33] EXPR D2[0] [L33] EXPR b2[1] [L33] EXPR D2[1] [L33] t2 = y1 + b2[0]*D2[0] - b2[1]*D2[1] [L34] EXPR A2[0] [L34] EXPR A2[1] [L34] EXPR D2[0] [L34] EXPR A2[2] [L34] EXPR D2[1] [L34] *y = A2[0]*t2 - A2[1]*D2[0] + A2[2]*D2[1] [L35] EXPR D2[0] [L35] D2[1] = D2[0] [L36] D2[0] = t2 [L50] RET iir4(&X, &P) [L52] EXPR \read(P) [L52] EXPR P >= -1e30 && P <= 1e30 [L52] CALL __VERIFIER_assert(P >= -1e30 && P <= 1e30) [L11] COND TRUE !(cond) [L11] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 26 SDslu, 1 SDs, 0 SdLazy, 27 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 1955 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...