./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 839c364b 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 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:18:02,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:18:02,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:18:02,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:18:02,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:18:02,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:18:02,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:18:02,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:18:02,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:18:02,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:18:02,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:18:02,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:18:02,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:18:02,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:18:02,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:18:02,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:18:02,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:18:02,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:18:02,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:18:02,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:18:02,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:18:02,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:18:02,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:18:02,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:18:02,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:18:02,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:18:02,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:18:02,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:18:02,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:18:02,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:18:02,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:18:02,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:18:02,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:18:02,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:18:02,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:18:02,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:18:02,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:18:02,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:18:02,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:18:02,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:18:02,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:18:02,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:18:02,872 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:18:02,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:18:02,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:18:02,874 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:18:02,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:18:02,875 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:18:02,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:18:02,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:18:02,876 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:18:02,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:18:02,877 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:18:02,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:18:02,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:18:02,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:18:02,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:18:02,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:18:02,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:18:02,878 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:18:02,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:18:02,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:18:02,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:18:02,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:18:02,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:18:02,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:18:02,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:18:02,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:18:02,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:18:02,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:18:02,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:18:02,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:18:02,881 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:18:02,882 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:18:02,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:18:02,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:18:02,882 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d [2021-12-14 13:18:03,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:18:03,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:18:03,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:18:03,175 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:18:03,176 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:18:03,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-14 13:18:03,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ecc5d0ea/a743e1d7b4d44b9ea6204ba7246a973e/FLAGd67eee253 [2021-12-14 13:18:03,709 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:18:03,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-14 13:18:03,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ecc5d0ea/a743e1d7b4d44b9ea6204ba7246a973e/FLAGd67eee253 [2021-12-14 13:18:03,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ecc5d0ea/a743e1d7b4d44b9ea6204ba7246a973e [2021-12-14 13:18:03,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:18:03,745 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:18:03,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:18:03,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:18:03,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:18:03,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:18:03" (1/1) ... [2021-12-14 13:18:03,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8e7652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:03, skipping insertion in model container [2021-12-14 13:18:03,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:18:03" (1/1) ... [2021-12-14 13:18:03,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:18:03,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:18:03,926 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] [2021-12-14 13:18:03,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:18:03,948 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:18:03,961 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] [2021-12-14 13:18:03,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:18:03,975 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:18:03,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:03 WrapperNode [2021-12-14 13:18:03,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:18:03,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:18:03,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:18:03,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:18:03,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:03" (1/1) ... [2021-12-14 13:18:03,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:03" (1/1) ... [2021-12-14 13:18:04,008 INFO L137 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2021-12-14 13:18:04,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:18:04,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:18:04,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:18:04,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:18:04,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:03" (1/1) ... [2021-12-14 13:18:04,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:03" (1/1) ... [2021-12-14 13:18:04,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:03" (1/1) ... [2021-12-14 13:18:04,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:03" (1/1) ... [2021-12-14 13:18:04,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:03" (1/1) ... [2021-12-14 13:18:04,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:03" (1/1) ... [2021-12-14 13:18:04,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:03" (1/1) ... [2021-12-14 13:18:04,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:18:04,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:18:04,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:18:04,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:18:04,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:03" (1/1) ... [2021-12-14 13:18:04,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:18:04,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:18:04,065 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) [2021-12-14 13:18:04,076 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 [2021-12-14 13:18:04,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:18:04,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:18:04,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:18:04,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:18:04,152 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:18:04,154 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:18:04,250 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:18:04,258 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:18:04,258 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 13:18:04,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:18:04 BoogieIcfgContainer [2021-12-14 13:18:04,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:18:04,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:18:04,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:18:04,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:18:04,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:18:03" (1/3) ... [2021-12-14 13:18:04,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1044087f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:18:04, skipping insertion in model container [2021-12-14 13:18:04,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:03" (2/3) ... [2021-12-14 13:18:04,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1044087f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:18:04, skipping insertion in model container [2021-12-14 13:18:04,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:18:04" (3/3) ... [2021-12-14 13:18:04,267 INFO L111 eAbstractionObserver]: Analyzing ICFG Float_div_bad.i [2021-12-14 13:18:04,274 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:18:04,275 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:18:04,322 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:18:04,329 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 [2021-12-14 13:18:04,330 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:18:04,345 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) [2021-12-14 13:18:04,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 13:18:04,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:18:04,352 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 13:18:04,353 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:18:04,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:18:04,358 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-14 13:18:04,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:18:04,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294457700] [2021-12-14 13:18:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:18:04,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:18:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 13:18:04,435 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 13:18:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 13:18:04,465 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 13:18:04,467 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 13:18:04,469 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-14 13:18:04,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:18:04,476 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-14 13:18:04,478 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 13:18:04,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 01:18:04 BoogieIcfgContainer [2021-12-14 13:18:04,500 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 13:18:04,502 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 13:18:04,503 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 13:18:04,503 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 13:18:04,503 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:18:04" (3/4) ... [2021-12-14 13:18:04,506 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-14 13:18:04,507 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 13:18:04,509 INFO L158 Benchmark]: Toolchain (without parser) took 762.52ms. Allocated memory was 86.0MB in the beginning and 115.3MB in the end (delta: 29.4MB). Free memory was 60.5MB in the beginning and 92.2MB in the end (delta: -31.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:18:04,510 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 86.0MB. Free memory is still 49.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:18:04,510 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.77ms. Allocated memory is still 86.0MB. Free memory was 60.3MB in the beginning and 63.1MB in the end (delta: -2.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 13:18:04,511 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.73ms. Allocated memory is still 86.0MB. Free memory was 63.1MB in the beginning and 61.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 13:18:04,516 INFO L158 Benchmark]: Boogie Preprocessor took 23.42ms. Allocated memory is still 86.0MB. Free memory was 61.5MB in the beginning and 60.5MB in the end (delta: 983.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:18:04,520 INFO L158 Benchmark]: RCFGBuilder took 226.49ms. Allocated memory is still 86.0MB. Free memory was 60.5MB in the beginning and 52.3MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 13:18:04,520 INFO L158 Benchmark]: TraceAbstraction took 238.63ms. Allocated memory was 86.0MB in the beginning and 115.3MB in the end (delta: 29.4MB). Free memory was 51.9MB in the beginning and 92.6MB in the end (delta: -40.7MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. [2021-12-14 13:18:04,522 INFO L158 Benchmark]: Witness Printer took 4.64ms. Allocated memory is still 115.3MB. Free memory was 92.5MB in the beginning and 92.2MB in the end (delta: 297.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:18:04,528 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 86.0MB. Free memory is still 49.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 230.77ms. Allocated memory is still 86.0MB. Free memory was 60.3MB in the beginning and 63.1MB in the end (delta: -2.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.73ms. Allocated memory is still 86.0MB. Free memory was 63.1MB in the beginning and 61.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.42ms. Allocated memory is still 86.0MB. Free memory was 61.5MB in the beginning and 60.5MB in the end (delta: 983.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 226.49ms. Allocated memory is still 86.0MB. Free memory was 60.5MB in the beginning and 52.3MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 238.63ms. Allocated memory was 86.0MB in the beginning and 115.3MB in the end (delta: 29.4MB). Free memory was 51.9MB in the beginning and 92.6MB in the end (delta: -40.7MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. * Witness Printer took 4.64ms. Allocated memory is still 115.3MB. Free memory was 92.5MB in the beginning and 92.2MB in the end (delta: 297.9kB). 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: 0.2s, 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 [2021-12-14 13:18:04,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:18:06,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:18:06,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:18:06,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:18:06,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:18:06,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:18:06,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:18:06,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:18:06,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:18:06,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:18:06,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:18:06,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:18:06,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:18:06,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:18:06,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:18:06,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:18:06,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:18:06,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:18:06,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:18:06,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:18:06,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:18:06,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:18:06,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:18:06,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:18:06,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:18:06,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:18:06,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:18:06,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:18:06,625 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:18:06,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:18:06,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:18:06,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:18:06,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:18:06,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:18:06,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:18:06,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:18:06,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:18:06,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:18:06,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:18:06,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:18:06,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:18:06,638 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-14 13:18:06,677 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:18:06,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:18:06,678 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:18:06,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:18:06,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:18:06,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:18:06,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:18:06,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:18:06,681 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:18:06,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:18:06,682 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:18:06,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:18:06,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:18:06,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:18:06,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:18:06,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:18:06,684 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 13:18:06,684 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-14 13:18:06,684 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-14 13:18:06,685 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:18:06,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:18:06,685 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:18:06,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:18:06,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:18:06,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:18:06,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:18:06,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:18:06,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:18:06,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:18:06,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:18:06,687 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-14 13:18:06,687 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-14 13:18:06,688 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:18:06,688 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:18:06,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:18:06,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:18:06,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-14 13:18:06,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d [2021-12-14 13:18:07,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:18:07,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:18:07,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:18:07,080 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:18:07,080 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:18:07,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-14 13:18:07,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0b7127b7/3a60d3119fe74a5c9cd568302a20e819/FLAG279ff33cc [2021-12-14 13:18:07,553 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:18:07,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-14 13:18:07,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0b7127b7/3a60d3119fe74a5c9cd568302a20e819/FLAG279ff33cc [2021-12-14 13:18:07,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0b7127b7/3a60d3119fe74a5c9cd568302a20e819 [2021-12-14 13:18:07,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:18:07,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:18:07,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:18:07,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:18:07,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:18:07,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:18:07" (1/1) ... [2021-12-14 13:18:07,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489abc59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:07, skipping insertion in model container [2021-12-14 13:18:07,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:18:07" (1/1) ... [2021-12-14 13:18:07,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:18:07,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:18:07,758 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] [2021-12-14 13:18:07,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:18:07,781 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:18:07,796 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] [2021-12-14 13:18:07,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:18:07,820 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:18:07,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:07 WrapperNode [2021-12-14 13:18:07,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:18:07,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:18:07,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:18:07,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:18:07,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:07" (1/1) ... [2021-12-14 13:18:07,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:07" (1/1) ... [2021-12-14 13:18:07,852 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2021-12-14 13:18:07,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:18:07,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:18:07,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:18:07,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:18:07,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:07" (1/1) ... [2021-12-14 13:18:07,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:07" (1/1) ... [2021-12-14 13:18:07,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:07" (1/1) ... [2021-12-14 13:18:07,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:07" (1/1) ... [2021-12-14 13:18:07,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:07" (1/1) ... [2021-12-14 13:18:07,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:07" (1/1) ... [2021-12-14 13:18:07,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:07" (1/1) ... [2021-12-14 13:18:07,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:18:07,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:18:07,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:18:07,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:18:07,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:07" (1/1) ... [2021-12-14 13:18:07,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:18:07,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:18:07,933 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) [2021-12-14 13:18:07,962 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 [2021-12-14 13:18:07,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:18:07,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-14 13:18:07,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:18:07,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:18:08,036 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:18:08,042 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:18:08,810 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:18:08,815 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:18:08,816 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 13:18:08,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:18:08 BoogieIcfgContainer [2021-12-14 13:18:08,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:18:08,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:18:08,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:18:08,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:18:08,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:18:07" (1/3) ... [2021-12-14 13:18:08,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d7c67c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:18:08, skipping insertion in model container [2021-12-14 13:18:08,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:18:07" (2/3) ... [2021-12-14 13:18:08,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d7c67c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:18:08, skipping insertion in model container [2021-12-14 13:18:08,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:18:08" (3/3) ... [2021-12-14 13:18:08,825 INFO L111 eAbstractionObserver]: Analyzing ICFG Float_div_bad.i [2021-12-14 13:18:08,829 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:18:08,830 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:18:08,868 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:18:08,874 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 [2021-12-14 13:18:08,875 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:18:08,886 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) [2021-12-14 13:18:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 13:18:08,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:18:08,890 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 13:18:08,891 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:18:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:18:08,896 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-14 13:18:08,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:18:08,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920820079] [2021-12-14 13:18:08,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:18:08,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:18:08,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:18:08,910 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) [2021-12-14 13:18:08,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-14 13:18:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:18:09,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 13:18:09,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:18:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:18:10,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:18:10,079 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:18:10,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920820079] [2021-12-14 13:18:10,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920820079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:18:10,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:18:10,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:18:10,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078191329] [2021-12-14 13:18:10,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:18:10,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 13:18:10,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:18:10,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 13:18:10,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 13:18:10,122 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) [2021-12-14 13:18:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:18:11,268 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-12-14 13:18:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 13:18:11,274 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 [2021-12-14 13:18:11,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:18:11,279 INFO L225 Difference]: With dead ends: 20 [2021-12-14 13:18:11,279 INFO L226 Difference]: Without dead ends: 8 [2021-12-14 13:18:11,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:18:11,284 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 13:18:11,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 13:18:11,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-14 13:18:11,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-14 13:18:11,304 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) [2021-12-14 13:18:11,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-14 13:18:11,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-12-14 13:18:11,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:18:11,306 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-14 13:18:11,306 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) [2021-12-14 13:18:11,306 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-14 13:18:11,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 13:18:11,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:18:11,307 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:18:11,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-14 13:18:11,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:18:11,508 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:18:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:18:11,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-12-14 13:18:11,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:18:11,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793621080] [2021-12-14 13:18:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:18:11,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:18:11,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:18:11,512 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) [2021-12-14 13:18:11,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-14 13:18:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:18:11,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 13:18:11,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:18:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:18:15,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:18:28,354 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 [2021-12-14 13:18:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:18:28,355 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:18:28,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793621080] [2021-12-14 13:18:28,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793621080] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:18:28,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 13:18:28,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-14 13:18:28,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072897954] [2021-12-14 13:18:28,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 13:18:28,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 13:18:28,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:18:28,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 13:18:28,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=28, Unknown=1, NotChecked=10, Total=56 [2021-12-14 13:18:28,358 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) [2021-12-14 13:18:29,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 13:18:45,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-14 13:18:47,346 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-14 13:18:47,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:18:47,764 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-12-14 13:18:47,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 13:18:47,791 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 [2021-12-14 13:18:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:18:47,792 INFO L225 Difference]: With dead ends: 15 [2021-12-14 13:18:47,792 INFO L226 Difference]: Without dead ends: 11 [2021-12-14 13:18:47,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=43, Invalid=70, Unknown=1, NotChecked=18, Total=132 [2021-12-14 13:18:47,794 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-12-14 13:18:47,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 1 Unknown, 7 Unchecked, 7.3s Time] [2021-12-14 13:18:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-12-14 13:18:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-12-14 13:18:47,796 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) [2021-12-14 13:18:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-12-14 13:18:47,796 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2021-12-14 13:18:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:18:47,797 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-12-14 13:18:47,797 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) [2021-12-14 13:18:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-12-14 13:18:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 13:18:47,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:18:47,797 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-12-14 13:18:47,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-14 13:18:47,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:18:47,998 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:18:47,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:18:47,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2021-12-14 13:18:47,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:18:47,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635401312] [2021-12-14 13:18:47,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:18:48,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:18:48,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:18:48,001 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) [2021-12-14 13:18:48,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-14 13:18:48,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:18:48,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:18:48,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-14 13:18:48,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:18:52,828 WARN L860 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0)) |c_ULTIMATE.start_main_~x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-12-14 13:18:58,743 WARN L860 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0)))) is different from true [2021-12-14 13:19:05,232 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-12-14 13:19:12,989 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (and (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0) |c_ULTIMATE.start_main_~x~0#1|) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-12-14 13:19:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2021-12-14 13:19:13,032 INFO L328 TraceCheckSpWp]: Computing backward predicates...