./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:08:22,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:08:22,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:08:22,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:08:22,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:08:22,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:08:22,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:08:22,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:08:22,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:08:22,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:08:22,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:08:22,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:08:22,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:08:22,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:08:22,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:08:22,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:08:22,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:08:22,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:08:22,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:08:22,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:08:22,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:08:22,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:08:22,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:08:22,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:08:22,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:08:22,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:08:22,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:08:22,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:08:22,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:08:22,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:08:22,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:08:22,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:08:22,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:08:22,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:08:22,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:08:22,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:08:22,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:08:22,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:08:22,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:08:22,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:08:22,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:08:22,787 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 10:08:22,813 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:08:22,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:08:22,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:08:22,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:08:22,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:08:22,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:08:22,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:08:22,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:08:22,816 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:08:22,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:08:22,817 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:08:22,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 10:08:22,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:08:22,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:08:22,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:08:22,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:08:22,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:08:22,818 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:08:22,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:08:22,818 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:08:22,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:08:22,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:08:22,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:08:22,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:08:22,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:08:22,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:08:22,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:08:22,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:08:22,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 10:08:22,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 10:08:22,821 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:08:22,822 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:08:22,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:08:22,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:08:22,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d [2021-12-22 10:08:23,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:08:23,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:08:23,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:08:23,025 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:08:23,026 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:08:23,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-22 10:08:23,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e97400a9/e6ace3b31a52411dbc03b4d921c994f5/FLAG97a461f0c [2021-12-22 10:08:23,446 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:08:23,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-22 10:08:23,456 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e97400a9/e6ace3b31a52411dbc03b4d921c994f5/FLAG97a461f0c [2021-12-22 10:08:23,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e97400a9/e6ace3b31a52411dbc03b4d921c994f5 [2021-12-22 10:08:23,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:08:23,470 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:08:23,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:08:23,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:08:23,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:08:23,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:08:23" (1/1) ... [2021-12-22 10:08:23,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3362023d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:23, skipping insertion in model container [2021-12-22 10:08:23,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:08:23" (1/1) ... [2021-12-22 10:08:23,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:08:23,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:08:23,612 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-12-22 10:08:23,620 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:08:23,626 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:08:23,634 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-12-22 10:08:23,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:08:23,644 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:08:23,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:23 WrapperNode [2021-12-22 10:08:23,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:08:23,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:08:23,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:08:23,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:08:23,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:23" (1/1) ... [2021-12-22 10:08:23,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:23" (1/1) ... [2021-12-22 10:08:23,665 INFO L137 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2021-12-22 10:08:23,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:08:23,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:08:23,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:08:23,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:08:23,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:23" (1/1) ... [2021-12-22 10:08:23,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:23" (1/1) ... [2021-12-22 10:08:23,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:23" (1/1) ... [2021-12-22 10:08:23,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:23" (1/1) ... [2021-12-22 10:08:23,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:23" (1/1) ... [2021-12-22 10:08:23,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:23" (1/1) ... [2021-12-22 10:08:23,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:23" (1/1) ... [2021-12-22 10:08:23,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:08:23,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:08:23,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:08:23,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:08:23,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:23" (1/1) ... [2021-12-22 10:08:23,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:08:23,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:08:23,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 10:08:23,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 10:08:23,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:08:23,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 10:08:23,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:08:23,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:08:23,770 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:08:23,771 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:08:23,854 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:08:23,857 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:08:23,858 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 10:08:23,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:08:23 BoogieIcfgContainer [2021-12-22 10:08:23,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:08:23,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:08:23,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:08:23,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:08:23,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:08:23" (1/3) ... [2021-12-22 10:08:23,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6917e9ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:08:23, skipping insertion in model container [2021-12-22 10:08:23,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:23" (2/3) ... [2021-12-22 10:08:23,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6917e9ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:08:23, skipping insertion in model container [2021-12-22 10:08:23,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:08:23" (3/3) ... [2021-12-22 10:08:23,865 INFO L111 eAbstractionObserver]: Analyzing ICFG Float_div_bad.i [2021-12-22 10:08:23,868 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:08:23,869 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:08:23,898 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:08:23,903 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 10:08:23,903 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:08:23,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:08:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 10:08:23,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:08:23,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 10:08:23,916 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:08:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:08:23,919 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-22 10:08:23,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:08:23,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305386508] [2021-12-22 10:08:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:08:23,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:08:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 10:08:23,983 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 10:08:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 10:08:24,001 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 10:08:24,003 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 10:08:24,004 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 10:08:24,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 10:08:24,008 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-22 10:08:24,010 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 10:08:24,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 10:08:24 BoogieIcfgContainer [2021-12-22 10:08:24,021 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 10:08:24,022 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 10:08:24,022 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 10:08:24,022 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 10:08:24,023 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:08:23" (3/4) ... [2021-12-22 10:08:24,025 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-22 10:08:24,025 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 10:08:24,026 INFO L158 Benchmark]: Toolchain (without parser) took 556.19ms. Allocated memory is still 107.0MB. Free memory was 78.6MB in the beginning and 58.9MB in the end (delta: 19.7MB). Peak memory consumption was 17.3MB. Max. memory is 16.1GB. [2021-12-22 10:08:24,026 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 107.0MB. Free memory is still 63.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 10:08:24,027 INFO L158 Benchmark]: CACSL2BoogieTranslator took 174.08ms. Allocated memory is still 107.0MB. Free memory was 78.4MB in the beginning and 82.6MB in the end (delta: -4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 10:08:24,027 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.51ms. Allocated memory is still 107.0MB. Free memory was 82.6MB in the beginning and 81.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 10:08:24,028 INFO L158 Benchmark]: Boogie Preprocessor took 12.26ms. Allocated memory is still 107.0MB. Free memory was 81.0MB in the beginning and 80.2MB in the end (delta: 805.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 10:08:24,028 INFO L158 Benchmark]: RCFGBuilder took 179.82ms. Allocated memory is still 107.0MB. Free memory was 80.2MB in the beginning and 71.8MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 10:08:24,029 INFO L158 Benchmark]: TraceAbstraction took 161.49ms. Allocated memory is still 107.0MB. Free memory was 71.5MB in the beginning and 59.2MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 10:08:24,029 INFO L158 Benchmark]: Witness Printer took 3.04ms. Allocated memory is still 107.0MB. Free memory was 59.2MB in the beginning and 58.9MB in the end (delta: 282.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 10:08:24,031 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 107.0MB. Free memory is still 63.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 174.08ms. Allocated memory is still 107.0MB. Free memory was 78.4MB in the beginning and 82.6MB in the end (delta: -4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.51ms. Allocated memory is still 107.0MB. Free memory was 82.6MB in the beginning and 81.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.26ms. Allocated memory is still 107.0MB. Free memory was 81.0MB in the beginning and 80.2MB in the end (delta: 805.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 179.82ms. Allocated memory is still 107.0MB. Free memory was 80.2MB in the beginning and 71.8MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 161.49ms. Allocated memory is still 107.0MB. Free memory was 71.5MB in the beginning and 59.2MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 3.04ms. Allocated memory is still 107.0MB. Free memory was 59.2MB in the beginning and 58.9MB in the end (delta: 282.8kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 29, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L20] float x = 1.0f; [L21] float x1 = x/1.6f; VAL [x=1] [L23] COND FALSE !(x1 != x) VAL [x=1] [L29] CALL __VERIFIER_assert(x == 0) [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L13] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 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 [2021-12-22 10:08:24,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:08:25,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:08:25,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:08:25,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:08:25,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:08:25,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:08:25,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:08:25,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:08:25,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:08:25,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:08:25,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:08:25,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:08:25,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:08:25,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:08:25,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:08:25,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:08:25,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:08:25,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:08:25,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:08:25,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:08:25,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:08:25,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:08:25,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:08:25,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:08:25,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:08:25,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:08:25,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:08:25,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:08:25,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:08:25,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:08:25,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:08:25,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:08:25,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:08:25,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:08:25,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:08:25,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:08:25,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:08:25,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:08:25,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:08:25,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:08:25,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:08:25,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-22 10:08:25,848 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:08:25,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:08:25,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:08:25,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:08:25,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:08:25,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:08:25,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:08:25,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:08:25,851 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:08:25,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:08:25,852 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:08:25,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:08:25,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:08:25,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:08:25,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:08:25,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:08:25,852 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 10:08:25,853 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 10:08:25,853 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 10:08:25,853 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:08:25,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:08:25,853 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:08:25,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:08:25,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:08:25,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:08:25,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:08:25,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:08:25,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:08:25,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:08:25,861 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:08:25,862 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 10:08:25,862 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 10:08:25,862 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:08:25,862 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:08:25,862 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:08:25,862 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:08:25,863 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 10:08:25,863 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d [2021-12-22 10:08:26,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:08:26,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:08:26,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:08:26,104 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:08:26,105 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:08:26,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-22 10:08:26,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a223aef/8a2660ac16314a12b9ec56ceeb226284/FLAGe8229f79b [2021-12-22 10:08:26,471 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:08:26,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-22 10:08:26,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a223aef/8a2660ac16314a12b9ec56ceeb226284/FLAGe8229f79b [2021-12-22 10:08:26,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a223aef/8a2660ac16314a12b9ec56ceeb226284 [2021-12-22 10:08:26,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:08:26,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:08:26,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:08:26,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:08:26,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:08:26,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:08:26" (1/1) ... [2021-12-22 10:08:26,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4307eeb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:26, skipping insertion in model container [2021-12-22 10:08:26,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:08:26" (1/1) ... [2021-12-22 10:08:26,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:08:26,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:08:27,051 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-12-22 10:08:27,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:08:27,070 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:08:27,084 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-12-22 10:08:27,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:08:27,125 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:08:27,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:27 WrapperNode [2021-12-22 10:08:27,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:08:27,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:08:27,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:08:27,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:08:27,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:27" (1/1) ... [2021-12-22 10:08:27,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:27" (1/1) ... [2021-12-22 10:08:27,157 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2021-12-22 10:08:27,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:08:27,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:08:27,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:08:27,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:08:27,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:27" (1/1) ... [2021-12-22 10:08:27,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:27" (1/1) ... [2021-12-22 10:08:27,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:27" (1/1) ... [2021-12-22 10:08:27,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:27" (1/1) ... [2021-12-22 10:08:27,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:27" (1/1) ... [2021-12-22 10:08:27,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:27" (1/1) ... [2021-12-22 10:08:27,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:27" (1/1) ... [2021-12-22 10:08:27,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:08:27,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:08:27,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:08:27,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:08:27,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:27" (1/1) ... [2021-12-22 10:08:27,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:08:27,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:08:27,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 10:08:27,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 10:08:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:08:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 10:08:27,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:08:27,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:08:27,297 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:08:27,298 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:08:28,117 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:08:28,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:08:28,121 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 10:08:28,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:08:28 BoogieIcfgContainer [2021-12-22 10:08:28,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:08:28,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:08:28,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:08:28,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:08:28,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:08:26" (1/3) ... [2021-12-22 10:08:28,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18999da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:08:28, skipping insertion in model container [2021-12-22 10:08:28,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:08:27" (2/3) ... [2021-12-22 10:08:28,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18999da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:08:28, skipping insertion in model container [2021-12-22 10:08:28,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:08:28" (3/3) ... [2021-12-22 10:08:28,129 INFO L111 eAbstractionObserver]: Analyzing ICFG Float_div_bad.i [2021-12-22 10:08:28,134 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:08:28,134 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:08:28,169 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:08:28,173 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 10:08:28,175 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:08:28,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:08:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 10:08:28,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:08:28,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 10:08:28,202 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:08:28,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:08:28,211 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-22 10:08:28,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 10:08:28,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505961151] [2021-12-22 10:08:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:08:28,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 10:08:28,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 10:08:28,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 10:08:28,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 10:08:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:08:28,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 10:08:28,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:08:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:08:30,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 10:08:30,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 10:08:30,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505961151] [2021-12-22 10:08:30,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505961151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:08:30,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:08:30,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 10:08:30,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781479481] [2021-12-22 10:08:30,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:08:30,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:08:30,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 10:08:30,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:08:30,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:08:30,097 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:08:31,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:08:31,621 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-12-22 10:08:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 10:08:31,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 10:08:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:08:31,723 INFO L225 Difference]: With dead ends: 20 [2021-12-22 10:08:31,723 INFO L226 Difference]: Without dead ends: 8 [2021-12-22 10:08:31,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:08:31,729 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 10:08:31,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 10:08:31,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-22 10:08:31,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-22 10:08:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:08:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-22 10:08:31,751 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-12-22 10:08:31,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:08:31,751 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-22 10:08:31,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:08:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-22 10:08:31,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 10:08:31,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:08:31,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:08:31,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-22 10:08:31,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 10:08:31,953 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:08:31,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:08:31,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-12-22 10:08:31,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 10:08:31,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619307687] [2021-12-22 10:08:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:08:31,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 10:08:31,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 10:08:31,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 10:08:31,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 10:08:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:08:32,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 10:08:32,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:08:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:08:35,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:08:52,247 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2021-12-22 10:08:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:08:52,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 10:08:52,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619307687] [2021-12-22 10:08:52,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619307687] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:08:52,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 10:08:52,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-22 10:08:52,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854091228] [2021-12-22 10:08:52,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 10:08:52,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 10:08:52,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 10:08:52,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 10:08:52,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=28, Unknown=2, NotChecked=10, Total=56 [2021-12-22 10:08:52,250 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:08:58,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:09:11,170 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:09:15,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:09:17,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:09:19,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:09:21,693 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:09:23,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:09:25,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-22 10:09:25,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:09:25,773 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-12-22 10:09:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 10:09:25,774 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 10:09:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:09:25,774 INFO L225 Difference]: With dead ends: 15 [2021-12-22 10:09:25,774 INFO L226 Difference]: Without dead ends: 11 [2021-12-22 10:09:25,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=42, Invalid=69, Unknown=3, NotChecked=18, Total=132 [2021-12-22 10:09:25,775 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2021-12-22 10:09:25,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 6 Unknown, 7 Unchecked, 17.4s Time] [2021-12-22 10:09:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-12-22 10:09:25,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-12-22 10:09:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:09:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-12-22 10:09:25,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2021-12-22 10:09:25,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:09:25,778 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-12-22 10:09:25,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:09:25,778 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-12-22 10:09:25,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 10:09:25,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:09:25,778 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-12-22 10:09:25,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-22 10:09:25,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 10:09:25,979 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:09:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:09:25,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2021-12-22 10:09:25,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 10:09:25,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083451994] [2021-12-22 10:09:25,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:09:25,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 10:09:25,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 10:09:25,981 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 10:09:25,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 10:09:26,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:09:26,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:09:26,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 10:09:26,658 INFO L286 TraceCheckSpWp]: Computing forward predicates...