./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-esbmc-regression/Double_div.i.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/Double_div.i.p+cfa-reducer.c -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 1b976e330e4c054879765a8eb6bc4e652ff9f2eb85e78e14695d7ebb374384cf --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 02:42:22,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 02:42:22,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 02:42:22,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 02:42:22,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 02:42:22,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 02:42:22,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 02:42:22,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 02:42:22,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 02:42:22,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 02:42:22,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 02:42:22,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 02:42:22,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 02:42:22,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 02:42:22,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 02:42:22,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 02:42:22,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 02:42:22,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 02:42:22,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 02:42:22,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 02:42:22,933 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 02:42:22,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 02:42:22,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 02:42:22,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 02:42:22,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 02:42:22,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 02:42:22,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 02:42:22,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 02:42:22,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 02:42:22,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 02:42:22,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 02:42:22,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 02:42:22,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 02:42:22,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 02:42:22,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 02:42:22,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 02:42:22,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 02:42:22,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 02:42:22,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 02:42:22,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 02:42:22,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 02:42:22,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 02:42:22,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 02:42:22,987 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 02:42:22,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 02:42:22,988 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 02:42:22,988 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 02:42:22,989 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 02:42:22,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 02:42:22,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 02:42:22,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 02:42:22,990 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 02:42:22,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 02:42:22,990 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 02:42:22,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 02:42:22,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 02:42:22,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 02:42:22,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 02:42:22,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 02:42:22,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 02:42:22,991 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 02:42:22,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 02:42:22,992 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 02:42:22,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 02:42:22,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 02:42:22,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 02:42:22,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 02:42:22,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 02:42:22,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 02:42:22,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 02:42:22,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 02:42:22,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 02:42:22,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 02:42:22,993 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 02:42:22,993 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 02:42:22,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 02:42:22,994 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b976e330e4c054879765a8eb6bc4e652ff9f2eb85e78e14695d7ebb374384cf [2022-07-12 02:42:23,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 02:42:23,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 02:42:23,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 02:42:23,212 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 02:42:23,213 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 02:42:23,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Double_div.i.p+cfa-reducer.c [2022-07-12 02:42:23,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97d3ab9b/1609eddc9a76444291f50b25db00b72c/FLAG46c3ba58c [2022-07-12 02:42:23,667 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 02:42:23,668 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div.i.p+cfa-reducer.c [2022-07-12 02:42:23,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97d3ab9b/1609eddc9a76444291f50b25db00b72c/FLAG46c3ba58c [2022-07-12 02:42:23,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97d3ab9b/1609eddc9a76444291f50b25db00b72c [2022-07-12 02:42:23,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 02:42:23,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 02:42:23,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 02:42:23,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 02:42:23,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 02:42:23,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 02:42:23" (1/1) ... [2022-07-12 02:42:23,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23fff61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:23, skipping insertion in model container [2022-07-12 02:42:23,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 02:42:23" (1/1) ... [2022-07-12 02:42:23,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 02:42:23,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 02:42:23,868 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/Double_div.i.p+cfa-reducer.c[670,683] [2022-07-12 02:42:23,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 02:42:23,876 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 02:42:23,885 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/Double_div.i.p+cfa-reducer.c[670,683] [2022-07-12 02:42:23,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 02:42:23,894 INFO L208 MainTranslator]: Completed translation [2022-07-12 02:42:23,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:23 WrapperNode [2022-07-12 02:42:23,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 02:42:23,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 02:42:23,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 02:42:23,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 02:42:23,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:23" (1/1) ... [2022-07-12 02:42:23,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:23" (1/1) ... [2022-07-12 02:42:23,923 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 28 [2022-07-12 02:42:23,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 02:42:23,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 02:42:23,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 02:42:23,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 02:42:23,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:23" (1/1) ... [2022-07-12 02:42:23,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:23" (1/1) ... [2022-07-12 02:42:23,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:23" (1/1) ... [2022-07-12 02:42:23,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:23" (1/1) ... [2022-07-12 02:42:23,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:23" (1/1) ... [2022-07-12 02:42:23,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:23" (1/1) ... [2022-07-12 02:42:23,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:23" (1/1) ... [2022-07-12 02:42:23,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 02:42:23,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 02:42:23,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 02:42:23,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 02:42:23,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:23" (1/1) ... [2022-07-12 02:42:23,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 02:42:23,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 02:42:23,978 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) [2022-07-12 02:42:23,980 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 [2022-07-12 02:42:24,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 02:42:24,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 02:42:24,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 02:42:24,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 02:42:24,056 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 02:42:24,057 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 02:42:24,128 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 02:42:24,133 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 02:42:24,134 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 02:42:24,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:42:24 BoogieIcfgContainer [2022-07-12 02:42:24,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 02:42:24,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 02:42:24,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 02:42:24,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 02:42:24,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 02:42:23" (1/3) ... [2022-07-12 02:42:24,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b64ebf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 02:42:24, skipping insertion in model container [2022-07-12 02:42:24,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:23" (2/3) ... [2022-07-12 02:42:24,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b64ebf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 02:42:24, skipping insertion in model container [2022-07-12 02:42:24,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:42:24" (3/3) ... [2022-07-12 02:42:24,144 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div.i.p+cfa-reducer.c [2022-07-12 02:42:24,157 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 02:42:24,158 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 02:42:24,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 02:42:24,223 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@38f4c805, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@ee3e2da [2022-07-12 02:42:24,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 02:42:24,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-07-12 02:42:24,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-12 02:42:24,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 02:42:24,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-12 02:42:24,251 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 02:42:24,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 02:42:24,259 INFO L85 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2022-07-12 02:42:24,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 02:42:24,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14988174] [2022-07-12 02:42:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 02:42:24,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 02:42:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 02:42:24,382 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 02:42:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 02:42:24,430 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 02:42:24,432 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 02:42:24,434 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-12 02:42:24,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 02:42:24,439 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-12 02:42:24,444 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 02:42:24,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 02:42:24 BoogieIcfgContainer [2022-07-12 02:42:24,468 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 02:42:24,470 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 02:42:24,471 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 02:42:24,471 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 02:42:24,472 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:42:24" (3/4) ... [2022-07-12 02:42:24,476 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-12 02:42:24,476 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 02:42:24,478 INFO L158 Benchmark]: Toolchain (without parser) took 779.78ms. Allocated memory is still 90.2MB. Free memory was 54.9MB in the beginning and 41.3MB in the end (delta: 13.5MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2022-07-12 02:42:24,479 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 90.2MB. Free memory was 59.0MB in the beginning and 59.0MB in the end (delta: 26.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 02:42:24,480 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.34ms. Allocated memory is still 90.2MB. Free memory was 54.6MB in the beginning and 66.0MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 02:42:24,480 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.27ms. Allocated memory is still 90.2MB. Free memory was 66.0MB in the beginning and 64.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 02:42:24,481 INFO L158 Benchmark]: Boogie Preprocessor took 19.20ms. Allocated memory is still 90.2MB. Free memory was 64.3MB in the beginning and 63.7MB in the end (delta: 647.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 02:42:24,485 INFO L158 Benchmark]: RCFGBuilder took 190.65ms. Allocated memory is still 90.2MB. Free memory was 63.4MB in the beginning and 55.1MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 02:42:24,485 INFO L158 Benchmark]: TraceAbstraction took 330.28ms. Allocated memory is still 90.2MB. Free memory was 54.5MB in the beginning and 41.6MB in the end (delta: 12.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 02:42:24,486 INFO L158 Benchmark]: Witness Printer took 5.89ms. Allocated memory is still 90.2MB. Free memory was 41.6MB in the beginning and 41.3MB in the end (delta: 299.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 02:42:24,493 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 90.2MB. Free memory was 59.0MB in the beginning and 59.0MB in the end (delta: 26.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 196.34ms. Allocated memory is still 90.2MB. Free memory was 54.6MB in the beginning and 66.0MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.27ms. Allocated memory is still 90.2MB. Free memory was 66.0MB in the beginning and 64.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.20ms. Allocated memory is still 90.2MB. Free memory was 64.3MB in the beginning and 63.7MB in the end (delta: 647.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 190.65ms. Allocated memory is still 90.2MB. Free memory was 63.4MB in the beginning and 55.1MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 330.28ms. Allocated memory is still 90.2MB. Free memory was 54.5MB in the beginning and 41.6MB in the end (delta: 12.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Witness Printer took 5.89ms. Allocated memory is still 90.2MB. Free memory was 41.6MB in the beginning and 41.3MB in the end (delta: 299.6kB). 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: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 12, overapproximation of someBinaryArithmeticDOUBLEoperation at line 10. Possible FailurePath: [L1] int __return_main; VAL [__return_main=0] [L9] double main__x = 1.0; [L10] double main__x1 = main__x / 2.5; VAL [__return_main=0, main__x=1] [L12] COND FALSE !(main__x1 != main__x) [L21] int __tmp_1; [L22] __tmp_1 = main__x == 0 [L23] int __VERIFIER_assert__cond; [L24] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L25] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L27] reach_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 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, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred 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, 5 NumberOfCodeBlocks, 5 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 [2022-07-12 02:42:24,552 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/Double_div.i.p+cfa-reducer.c -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 1b976e330e4c054879765a8eb6bc4e652ff9f2eb85e78e14695d7ebb374384cf --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 02:42:26,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 02:42:26,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 02:42:26,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 02:42:26,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 02:42:26,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 02:42:26,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 02:42:26,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 02:42:26,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 02:42:26,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 02:42:26,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 02:42:26,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 02:42:26,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 02:42:26,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 02:42:26,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 02:42:26,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 02:42:26,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 02:42:26,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 02:42:26,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 02:42:26,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 02:42:26,633 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 02:42:26,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 02:42:26,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 02:42:26,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 02:42:26,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 02:42:26,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 02:42:26,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 02:42:26,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 02:42:26,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 02:42:26,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 02:42:26,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 02:42:26,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 02:42:26,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 02:42:26,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 02:42:26,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 02:42:26,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 02:42:26,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 02:42:26,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 02:42:26,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 02:42:26,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 02:42:26,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 02:42:26,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 02:42:26,654 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-12 02:42:26,686 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 02:42:26,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 02:42:26,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 02:42:26,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 02:42:26,687 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 02:42:26,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 02:42:26,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 02:42:26,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 02:42:26,688 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 02:42:26,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 02:42:26,689 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 02:42:26,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 02:42:26,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 02:42:26,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 02:42:26,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 02:42:26,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 02:42:26,690 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 02:42:26,690 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 02:42:26,691 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 02:42:26,691 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 02:42:26,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 02:42:26,691 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 02:42:26,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 02:42:26,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 02:42:26,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 02:42:26,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 02:42:26,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 02:42:26,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 02:42:26,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 02:42:26,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 02:42:26,693 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 02:42:26,693 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 02:42:26,693 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 02:42:26,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 02:42:26,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 02:42:26,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 02:42:26,694 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b976e330e4c054879765a8eb6bc4e652ff9f2eb85e78e14695d7ebb374384cf [2022-07-12 02:42:26,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 02:42:27,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 02:42:27,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 02:42:27,018 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 02:42:27,018 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 02:42:27,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Double_div.i.p+cfa-reducer.c [2022-07-12 02:42:27,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7bfc4917/aa5221552afd47ad94bc8acecdcc5f5a/FLAGe674813a9 [2022-07-12 02:42:27,471 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 02:42:27,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div.i.p+cfa-reducer.c [2022-07-12 02:42:27,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7bfc4917/aa5221552afd47ad94bc8acecdcc5f5a/FLAGe674813a9 [2022-07-12 02:42:27,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7bfc4917/aa5221552afd47ad94bc8acecdcc5f5a [2022-07-12 02:42:27,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 02:42:27,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 02:42:27,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 02:42:27,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 02:42:27,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 02:42:27,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 02:42:27" (1/1) ... [2022-07-12 02:42:27,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f188b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:27, skipping insertion in model container [2022-07-12 02:42:27,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 02:42:27" (1/1) ... [2022-07-12 02:42:27,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 02:42:27,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 02:42:27,685 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/Double_div.i.p+cfa-reducer.c[670,683] [2022-07-12 02:42:27,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 02:42:27,704 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 02:42:27,724 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/Double_div.i.p+cfa-reducer.c[670,683] [2022-07-12 02:42:27,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 02:42:27,740 INFO L208 MainTranslator]: Completed translation [2022-07-12 02:42:27,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:27 WrapperNode [2022-07-12 02:42:27,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 02:42:27,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 02:42:27,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 02:42:27,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 02:42:27,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:27" (1/1) ... [2022-07-12 02:42:27,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:27" (1/1) ... [2022-07-12 02:42:27,783 INFO L137 Inliner]: procedures = 13, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2022-07-12 02:42:27,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 02:42:27,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 02:42:27,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 02:42:27,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 02:42:27,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:27" (1/1) ... [2022-07-12 02:42:27,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:27" (1/1) ... [2022-07-12 02:42:27,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:27" (1/1) ... [2022-07-12 02:42:27,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:27" (1/1) ... [2022-07-12 02:42:27,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:27" (1/1) ... [2022-07-12 02:42:27,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:27" (1/1) ... [2022-07-12 02:42:27,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:27" (1/1) ... [2022-07-12 02:42:27,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 02:42:27,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 02:42:27,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 02:42:27,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 02:42:27,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:27" (1/1) ... [2022-07-12 02:42:27,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 02:42:27,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 02:42:27,851 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) [2022-07-12 02:42:27,872 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 [2022-07-12 02:42:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 02:42:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 02:42:27,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 02:42:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-12 02:42:27,948 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 02:42:27,949 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 02:42:31,439 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 02:42:31,443 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 02:42:31,443 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 02:42:31,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:42:31 BoogieIcfgContainer [2022-07-12 02:42:31,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 02:42:31,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 02:42:31,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 02:42:31,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 02:42:31,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 02:42:27" (1/3) ... [2022-07-12 02:42:31,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b98219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 02:42:31, skipping insertion in model container [2022-07-12 02:42:31,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 02:42:27" (2/3) ... [2022-07-12 02:42:31,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b98219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 02:42:31, skipping insertion in model container [2022-07-12 02:42:31,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 02:42:31" (3/3) ... [2022-07-12 02:42:31,450 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div.i.p+cfa-reducer.c [2022-07-12 02:42:31,461 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 02:42:31,462 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 02:42:31,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 02:42:31,512 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2de5b465, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@48c685fb [2022-07-12 02:42:31,512 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 02:42:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 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) [2022-07-12 02:42:31,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-12 02:42:31,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 02:42:31,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-12 02:42:31,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 02:42:31,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 02:42:31,546 INFO L85 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2022-07-12 02:42:31,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 02:42:31,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147592999] [2022-07-12 02:42:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 02:42:31,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 02:42:31,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 02:42:31,573 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) [2022-07-12 02:42:31,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 02:42:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 02:42:31,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 02:42:31,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 02:42:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 02:42:37,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 02:42:37,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 02:42:37,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147592999] [2022-07-12 02:42:37,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147592999] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 02:42:37,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 02:42:37,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 02:42:37,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256500519] [2022-07-12 02:42:37,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 02:42:37,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 02:42:37,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 02:42:37,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 02:42:37,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 02:42:37,787 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 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 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-12 02:42:42,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 02:42:42,758 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-07-12 02:42:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 02:42:42,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-07-12 02:42:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 02:42:42,766 INFO L225 Difference]: With dead ends: 16 [2022-07-12 02:42:42,766 INFO L226 Difference]: Without dead ends: 7 [2022-07-12 02:42:42,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 02:42:42,770 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-12 02:42:42,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-12 02:42:42,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-07-12 02:42:42,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-07-12 02:42:42,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2022-07-12 02:42:42,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2022-07-12 02:42:42,791 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2022-07-12 02:42:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 02:42:42,791 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2022-07-12 02:42:42,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-07-12 02:42:42,792 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2022-07-12 02:42:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 02:42:42,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 02:42:42,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 02:42:42,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-12 02:42:43,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 02:42:43,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 02:42:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 02:42:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash 889537510, now seen corresponding path program 1 times [2022-07-12 02:42:43,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 02:42:43,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088455702] [2022-07-12 02:42:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 02:42:43,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 02:42:43,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 02:42:43,008 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) [2022-07-12 02:42:43,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 02:42:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 02:42:43,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 02:42:43,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 02:42:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 02:42:50,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 02:42:58,580 WARN L833 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) is different from false [2022-07-12 02:43:00,714 WARN L855 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) is different from true [2022-07-12 02:43:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-12 02:43:03,258 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 02:43:03,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088455702] [2022-07-12 02:43:03,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088455702] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 02:43:03,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 02:43:03,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-07-12 02:43:03,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044889064] [2022-07-12 02:43:03,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 02:43:03,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 02:43:03,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 02:43:03,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 02:43:03,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=19, Unknown=2, NotChecked=8, Total=42 [2022-07-12 02:43:03,261 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2022-07-12 02:43:06,439 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (not (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| |c_ULTIMATE.start_main_~main__x~0#1|)) (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse0) |c_ULTIMATE.start_main_~main__x1~0#1|)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2022-07-12 02:43:07,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:43:10,011 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:43:10,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 02:43:10,609 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2022-07-12 02:43:10,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 02:43:10,610 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 [2022-07-12 02:43:10,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 02:43:10,610 INFO L225 Difference]: With dead ends: 12 [2022-07-12 02:43:10,610 INFO L226 Difference]: Without dead ends: 9 [2022-07-12 02:43:10,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=15, Invalid=20, Unknown=3, NotChecked=18, Total=56 [2022-07-12 02:43:10,611 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-12 02:43:10,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 1 Unknown, 7 Unchecked, 5.1s Time] [2022-07-12 02:43:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-12 02:43:10,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-12 02:43:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2022-07-12 02:43:10,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-07-12 02:43:10,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2022-07-12 02:43:10,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 02:43:10,614 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-07-12 02:43:10,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2022-07-12 02:43:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-07-12 02:43:10,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 02:43:10,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 02:43:10,614 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2022-07-12 02:43:10,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 02:43:10,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 02:43:10,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 02:43:10,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 02:43:10,816 INFO L85 PathProgramCache]: Analyzing trace with hash 145055718, now seen corresponding path program 2 times [2022-07-12 02:43:10,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 02:43:10,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025901556] [2022-07-12 02:43:10,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 02:43:10,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 02:43:10,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 02:43:10,818 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) [2022-07-12 02:43:10,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 02:43:11,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 02:43:11,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 02:43:11,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 02:43:11,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 02:43:23,948 WARN L233 SmtUtils]: Spent 6.62s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 02:43:29,044 WARN L233 SmtUtils]: Spent 5.08s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-12 02:43:31,932 WARN L855 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0)) |c_ULTIMATE.start_main_~main__x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2022-07-12 02:43:40,606 WARN L233 SmtUtils]: Spent 5.47s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-12 02:43:43,685 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (= |c_ULTIMATE.start_main_~main__x~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0)) (= (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x~0#1| .cse0) |c_ULTIMATE.start_main_~main__x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2022-07-12 02:43:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-07-12 02:43:43,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 02:43:55,232 WARN L855 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) is different from true [2022-07-12 02:44:06,185 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2022-07-12 02:44:08,446 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2022-07-12 02:44:13,903 WARN L233 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-12 02:44:19,182 WARN L233 SmtUtils]: Spent 5.28s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-12 02:44:21,593 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from false [2022-07-12 02:44:23,984 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))))) is different from true [2022-07-12 02:44:29,605 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-12 02:44:34,928 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-12 02:44:37,329 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from false [2022-07-12 02:44:39,713 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) is different from true [2022-07-12 02:44:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-12 02:44:39,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 02:44:39,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025901556] [2022-07-12 02:44:39,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025901556] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 02:44:39,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 02:44:39,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-07-12 02:44:39,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228094359] [2022-07-12 02:44:39,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 02:44:39,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 02:44:39,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 02:44:39,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 02:44:39,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=32, Unknown=9, NotChecked=90, Total=156 [2022-07-12 02:44:39,716 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 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) [2022-07-12 02:44:42,157 WARN L855 $PredicateComparison]: unable to prove that (and (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2022-07-12 02:44:44,598 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))))) (= |c_ULTIMATE.start_main_~main__x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2022-07-12 02:44:47,417 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1) .cse1) |c_ULTIMATE.start_main_~main__x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2022-07-12 02:44:49,718 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (= (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) |c_ULTIMATE.start_main_~main__x1~0#1|) (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse0) |c_ULTIMATE.start_main_~main__x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2022-07-12 02:45:19,434 WARN L233 SmtUtils]: Spent 22.22s on a formula simplification. DAG size of input: 22 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 02:45:21,632 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:45:27,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 02:45:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 02:45:30,146 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-07-12 02:45:30,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 02:45:30,147 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 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 8 [2022-07-12 02:45:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 02:45:30,147 INFO L225 Difference]: With dead ends: 15 [2022-07-12 02:45:30,147 INFO L226 Difference]: Without dead ends: 11 [2022-07-12 02:45:30,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.2s TimeCoverageRelationStatistics Valid=48, Invalid=64, Unknown=18, NotChecked=250, Total=380 [2022-07-12 02:45:30,149 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-12 02:45:30,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 1 Unknown, 39 Unchecked, 5.5s Time] [2022-07-12 02:45:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-07-12 02:45:30,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-07-12 02:45:30,151 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) [2022-07-12 02:45:30,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2022-07-12 02:45:30,151 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2022-07-12 02:45:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 02:45:30,152 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2022-07-12 02:45:30,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 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) [2022-07-12 02:45:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2022-07-12 02:45:30,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 02:45:30,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 02:45:30,152 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1] [2022-07-12 02:45:30,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-12 02:45:30,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 02:45:30,356 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 02:45:30,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 02:45:30,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1957592038, now seen corresponding path program 3 times [2022-07-12 02:45:30,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 02:45:30,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003062257] [2022-07-12 02:45:30,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 02:45:30,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 02:45:30,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 02:45:30,359 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 02:45:30,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 02:45:31,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 02:45:31,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 02:45:31,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 02:45:31,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 02:45:42,912 WARN L855 $PredicateComparison]: unable to prove that (and (= (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~main__x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2022-07-12 02:45:48,009 WARN L233 SmtUtils]: Spent 5.08s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-12 02:45:53,015 WARN L233 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-12 02:46:02,736 WARN L833 $PredicateComparison]: unable to prove that (and (= (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~main__x1~0#1|) (exists ((|v_ULTIMATE.start_main_~main__x~0#1_12| (_ FloatingPoint 11 53))) (let ((.cse0 (fp.div c_currentRoundingMode |v_ULTIMATE.start_main_~main__x~0#1_12| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))))) (and (not (fp.eq .cse0 |v_ULTIMATE.start_main_~main__x~0#1_12|)) (= |c_ULTIMATE.start_main_~main__x~0#1| .cse0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-07-12 02:46:04,876 WARN L855 $PredicateComparison]: unable to prove that (and (= (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~main__x1~0#1|) (exists ((|v_ULTIMATE.start_main_~main__x~0#1_12| (_ FloatingPoint 11 53))) (let ((.cse0 (fp.div c_currentRoundingMode |v_ULTIMATE.start_main_~main__x~0#1_12| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))))) (and (not (fp.eq .cse0 |v_ULTIMATE.start_main_~main__x~0#1_12|)) (= |c_ULTIMATE.start_main_~main__x~0#1| .cse0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2022-07-12 02:46:15,728 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-12 02:46:24,233 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-12 02:46:29,270 WARN L233 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-12 02:46:36,603 WARN L833 $PredicateComparison]: unable to prove that (or (and (exists ((|v_ULTIMATE.start_main_~main__x~0#1_12| (_ FloatingPoint 11 53))) (let ((.cse0 (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~main__x~0#1_12| ((_ to_fp 11 53) roundNearestTiesToEven (/ 5.0 2.0))))) (and (not (fp.eq .cse0 |v_ULTIMATE.start_main_~main__x~0#1_12|)) (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))))) (= |c_ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| (_ bv1 32))) (and (= |c_ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| (_ bv0 32)) (exists ((|v_ULTIMATE.start_main_~main__x~0#1_12| (_ FloatingPoint 11 53))) (let ((.cse2 ((_ to_fp 11 53) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse1 (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~main__x~0#1_12| .cse2))) (and (not (fp.eq .cse1 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (not (fp.eq .cse1 |v_ULTIMATE.start_main_~main__x~0#1_12|)) (fp.eq (fp.div roundNearestTiesToEven .cse1 .cse2) .cse1))))))) is different from false [2022-07-12 02:46:44,078 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-12 02:46:49,215 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-12 02:46:56,316 WARN L833 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~main__x~0#1_12| (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~main__x~0#1_12| .cse1))) (and (not (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (not (fp.eq .cse0 |v_ULTIMATE.start_main_~main__x~0#1_12|)) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from false [2022-07-12 02:46:58,508 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~main__x~0#1_12| (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) roundNearestTiesToEven (/ 5.0 2.0)))) (let ((.cse0 (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~main__x~0#1_12| .cse1))) (and (not (fp.eq .cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (not (fp.eq .cse0 |v_ULTIMATE.start_main_~main__x~0#1_12|)) (fp.eq (fp.div roundNearestTiesToEven .cse0 .cse1) .cse0))))) is different from true [2022-07-12 02:46:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 9 not checked. [2022-07-12 02:46:58,509 INFO L328 TraceCheckSpWp]: Computing backward predicates...