./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 23:28:57,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 23:28:57,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 23:28:57,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 23:28:57,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 23:28:57,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 23:28:57,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 23:28:57,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 23:28:57,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 23:28:57,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 23:28:57,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 23:28:57,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 23:28:57,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 23:28:57,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 23:28:57,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 23:28:57,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 23:28:57,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 23:28:57,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 23:28:57,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 23:28:57,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 23:28:57,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 23:28:57,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 23:28:57,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 23:28:57,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 23:28:57,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 23:28:57,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 23:28:57,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 23:28:57,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 23:28:57,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 23:28:57,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 23:28:57,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 23:28:57,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 23:28:57,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 23:28:57,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 23:28:57,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 23:28:57,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 23:28:57,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 23:28:57,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 23:28:57,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 23:28:57,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 23:28:57,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 23:28:57,594 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 23:28:57,627 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 23:28:57,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 23:28:57,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 23:28:57,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 23:28:57,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 23:28:57,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 23:28:57,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 23:28:57,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 23:28:57,630 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 23:28:57,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 23:28:57,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 23:28:57,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 23:28:57,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 23:28:57,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 23:28:57,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 23:28:57,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 23:28:57,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 23:28:57,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 23:28:57,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 23:28:57,632 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 23:28:57,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 23:28:57,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 23:28:57,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 23:28:57,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 23:28:57,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:28:57,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 23:28:57,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 23:28:57,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 23:28:57,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 23:28:57,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 23:28:57,634 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 23:28:57,634 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 23:28:57,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 23:28:57,634 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d [2021-12-27 23:28:57,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 23:28:57,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 23:28:57,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 23:28:57,902 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 23:28:57,903 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 23:28:57,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-27 23:28:57,955 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/017bace89/3a2de7d465694d9da2b0495d7a79474b/FLAG8f5c39d88 [2021-12-27 23:28:58,262 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 23:28:58,262 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-27 23:28:58,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/017bace89/3a2de7d465694d9da2b0495d7a79474b/FLAG8f5c39d88 [2021-12-27 23:28:58,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/017bace89/3a2de7d465694d9da2b0495d7a79474b [2021-12-27 23:28:58,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 23:28:58,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 23:28:58,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 23:28:58,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 23:28:58,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 23:28:58,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:28:58" (1/1) ... [2021-12-27 23:28:58,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc117e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:28:58, skipping insertion in model container [2021-12-27 23:28:58,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:28:58" (1/1) ... [2021-12-27 23:28:58,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 23:28:58,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 23:28:58,796 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-12-27 23:28:58,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:28:58,809 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 23:28:58,817 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-12-27 23:28:58,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:28:58,827 INFO L208 MainTranslator]: Completed translation [2021-12-27 23:28:58,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:28:58 WrapperNode [2021-12-27 23:28:58,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 23:28:58,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 23:28:58,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 23:28:58,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 23:28:58,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:28:58" (1/1) ... [2021-12-27 23:28:58,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:28:58" (1/1) ... [2021-12-27 23:28:58,890 INFO L137 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2021-12-27 23:28:58,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 23:28:58,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 23:28:58,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 23:28:58,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 23:28:58,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:28:58" (1/1) ... [2021-12-27 23:28:58,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:28:58" (1/1) ... [2021-12-27 23:28:58,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:28:58" (1/1) ... [2021-12-27 23:28:58,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:28:58" (1/1) ... [2021-12-27 23:28:58,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:28:58" (1/1) ... [2021-12-27 23:28:58,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:28:58" (1/1) ... [2021-12-27 23:28:58,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:28:58" (1/1) ... [2021-12-27 23:28:58,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 23:28:58,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 23:28:58,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 23:28:58,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 23:28:58,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:28:58" (1/1) ... [2021-12-27 23:28:58,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:28:58,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:28:58,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-27 23:28:58,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-27 23:28:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 23:28:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 23:28:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 23:28:58,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 23:28:59,019 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 23:28:59,020 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 23:28:59,106 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 23:28:59,111 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 23:28:59,112 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-27 23:28:59,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:28:59 BoogieIcfgContainer [2021-12-27 23:28:59,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 23:28:59,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 23:28:59,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 23:28:59,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 23:28:59,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:28:58" (1/3) ... [2021-12-27 23:28:59,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505aa827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:28:59, skipping insertion in model container [2021-12-27 23:28:59,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:28:58" (2/3) ... [2021-12-27 23:28:59,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505aa827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:28:59, skipping insertion in model container [2021-12-27 23:28:59,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:28:59" (3/3) ... [2021-12-27 23:28:59,119 INFO L111 eAbstractionObserver]: Analyzing ICFG Float_div_bad.i [2021-12-27 23:28:59,123 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 23:28:59,123 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 23:28:59,152 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 23:28:59,160 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 23:28:59,161 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 23:28:59,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:28:59,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-27 23:28:59,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:28:59,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-27 23:28:59,173 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:28:59,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:28:59,177 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-27 23:28:59,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:28:59,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116596558] [2021-12-27 23:28:59,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:28:59,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:28:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-27 23:28:59,255 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-27 23:28:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-27 23:28:59,289 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-27 23:28:59,290 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-27 23:28:59,291 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-27 23:28:59,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 23:28:59,298 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-27 23:28:59,300 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-27 23:28:59,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 11:28:59 BoogieIcfgContainer [2021-12-27 23:28:59,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-27 23:28:59,317 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-27 23:28:59,317 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-27 23:28:59,317 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-27 23:28:59,317 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:28:59" (3/4) ... [2021-12-27 23:28:59,320 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-27 23:28:59,320 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-27 23:28:59,321 INFO L158 Benchmark]: Toolchain (without parser) took 631.35ms. Allocated memory is still 77.6MB. Free memory was 59.0MB in the beginning and 37.7MB in the end (delta: 21.3MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2021-12-27 23:28:59,322 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 77.6MB. Free memory is still 58.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 23:28:59,323 INFO L158 Benchmark]: CACSL2BoogieTranslator took 137.84ms. Allocated memory is still 77.6MB. Free memory was 58.8MB in the beginning and 49.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-27 23:28:59,324 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.87ms. Allocated memory is still 77.6MB. Free memory was 49.2MB in the beginning and 59.8MB in the end (delta: -10.6MB). Peak memory consumption was 2.5MB. Max. memory is 16.1GB. [2021-12-27 23:28:59,324 INFO L158 Benchmark]: Boogie Preprocessor took 17.74ms. Allocated memory is still 77.6MB. Free memory was 59.8MB in the beginning and 58.9MB in the end (delta: 924.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-27 23:28:59,327 INFO L158 Benchmark]: RCFGBuilder took 203.03ms. Allocated memory is still 77.6MB. Free memory was 58.9MB in the beginning and 50.8MB in the end (delta: 8.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-27 23:28:59,328 INFO L158 Benchmark]: TraceAbstraction took 199.85ms. Allocated memory is still 77.6MB. Free memory was 50.3MB in the beginning and 37.9MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-27 23:28:59,329 INFO L158 Benchmark]: Witness Printer took 3.40ms. Allocated memory is still 77.6MB. Free memory was 37.9MB in the beginning and 37.7MB in the end (delta: 262.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 23:28:59,334 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 77.6MB. Free memory is still 58.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 137.84ms. Allocated memory is still 77.6MB. Free memory was 58.8MB in the beginning and 49.2MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.87ms. Allocated memory is still 77.6MB. Free memory was 49.2MB in the beginning and 59.8MB in the end (delta: -10.6MB). Peak memory consumption was 2.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.74ms. Allocated memory is still 77.6MB. Free memory was 59.8MB in the beginning and 58.9MB in the end (delta: 924.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 203.03ms. Allocated memory is still 77.6MB. Free memory was 58.9MB in the beginning and 50.8MB in the end (delta: 8.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 199.85ms. Allocated memory is still 77.6MB. Free memory was 50.3MB in the beginning and 37.9MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 3.40ms. Allocated memory is still 77.6MB. Free memory was 37.9MB in the beginning and 37.7MB in the end (delta: 262.6kB). 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: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 29, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L20] float x = 1.0f; [L21] float x1 = x/1.6f; VAL [x=1] [L23] COND FALSE !(x1 != x) VAL [x=1] [L29] CALL __VERIFIER_assert(x == 0) [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L13] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-27 23:28:59,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 23:29:00,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 23:29:00,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 23:29:00,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 23:29:00,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 23:29:00,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 23:29:00,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 23:29:00,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 23:29:00,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 23:29:00,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 23:29:00,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 23:29:00,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 23:29:00,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 23:29:00,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 23:29:00,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 23:29:00,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 23:29:00,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 23:29:00,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 23:29:00,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 23:29:00,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 23:29:00,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 23:29:00,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 23:29:00,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 23:29:00,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 23:29:00,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 23:29:00,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 23:29:00,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 23:29:00,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 23:29:00,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 23:29:00,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 23:29:00,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 23:29:00,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 23:29:00,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 23:29:00,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 23:29:00,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 23:29:00,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 23:29:00,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 23:29:00,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 23:29:00,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 23:29:00,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 23:29:00,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 23:29:00,998 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-27 23:29:01,027 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 23:29:01,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 23:29:01,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 23:29:01,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 23:29:01,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 23:29:01,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 23:29:01,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 23:29:01,031 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 23:29:01,031 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 23:29:01,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 23:29:01,032 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 23:29:01,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 23:29:01,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 23:29:01,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 23:29:01,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 23:29:01,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 23:29:01,032 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-27 23:29:01,033 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-27 23:29:01,033 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-27 23:29:01,033 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 23:29:01,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 23:29:01,033 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 23:29:01,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 23:29:01,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 23:29:01,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 23:29:01,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 23:29:01,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:29:01,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 23:29:01,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 23:29:01,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 23:29:01,039 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-27 23:29:01,039 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-27 23:29:01,039 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 23:29:01,039 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 23:29:01,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 23:29:01,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-27 23:29:01,040 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d [2021-12-27 23:29:01,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 23:29:01,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 23:29:01,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 23:29:01,341 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 23:29:01,341 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 23:29:01,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-27 23:29:01,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32c71f6aa/181462cf8e60471bad12f02f8717103a/FLAGa2cfbae76 [2021-12-27 23:29:01,736 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 23:29:01,736 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-27 23:29:01,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32c71f6aa/181462cf8e60471bad12f02f8717103a/FLAGa2cfbae76 [2021-12-27 23:29:01,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32c71f6aa/181462cf8e60471bad12f02f8717103a [2021-12-27 23:29:01,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 23:29:01,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 23:29:01,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 23:29:01,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 23:29:01,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 23:29:01,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:29:01" (1/1) ... [2021-12-27 23:29:01,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@651757e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:29:01, skipping insertion in model container [2021-12-27 23:29:01,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:29:01" (1/1) ... [2021-12-27 23:29:01,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 23:29:01,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 23:29:01,870 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-12-27 23:29:01,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:29:01,893 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 23:29:01,909 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-12-27 23:29:01,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:29:01,925 INFO L208 MainTranslator]: Completed translation [2021-12-27 23:29:01,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:29:01 WrapperNode [2021-12-27 23:29:01,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 23:29:01,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 23:29:01,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 23:29:01,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 23:29:01,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:29:01" (1/1) ... [2021-12-27 23:29:01,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:29:01" (1/1) ... [2021-12-27 23:29:01,949 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2021-12-27 23:29:01,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 23:29:01,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 23:29:01,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 23:29:01,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 23:29:01,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:29:01" (1/1) ... [2021-12-27 23:29:01,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:29:01" (1/1) ... [2021-12-27 23:29:01,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:29:01" (1/1) ... [2021-12-27 23:29:01,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:29:01" (1/1) ... [2021-12-27 23:29:01,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:29:01" (1/1) ... [2021-12-27 23:29:01,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:29:01" (1/1) ... [2021-12-27 23:29:01,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:29:01" (1/1) ... [2021-12-27 23:29:01,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 23:29:01,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 23:29:01,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 23:29:01,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 23:29:01,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:29:01" (1/1) ... [2021-12-27 23:29:01,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:29:01,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:29:02,005 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-27 23:29:02,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-27 23:29:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 23:29:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-27 23:29:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 23:29:02,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 23:29:02,081 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 23:29:02,082 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 23:29:02,697 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 23:29:02,700 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 23:29:02,701 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-27 23:29:02,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:29:02 BoogieIcfgContainer [2021-12-27 23:29:02,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 23:29:02,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 23:29:02,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 23:29:02,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 23:29:02,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:29:01" (1/3) ... [2021-12-27 23:29:02,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f7d428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:29:02, skipping insertion in model container [2021-12-27 23:29:02,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:29:01" (2/3) ... [2021-12-27 23:29:02,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f7d428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:29:02, skipping insertion in model container [2021-12-27 23:29:02,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:29:02" (3/3) ... [2021-12-27 23:29:02,707 INFO L111 eAbstractionObserver]: Analyzing ICFG Float_div_bad.i [2021-12-27 23:29:02,710 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 23:29:02,710 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 23:29:02,747 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 23:29:02,751 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 23:29:02,751 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 23:29:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:29:02,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-27 23:29:02,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:29:02,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-27 23:29:02,763 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:29:02,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:29:02,766 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-27 23:29:02,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 23:29:02,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409414054] [2021-12-27 23:29:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:29:02,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 23:29:02,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 23:29:02,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-27 23:29:02,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-27 23:29:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:29:02,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 23:29:02,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:29:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:29:04,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 23:29:04,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 23:29:04,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409414054] [2021-12-27 23:29:04,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409414054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:29:04,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:29:04,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 23:29:04,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924116043] [2021-12-27 23:29:04,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:29:04,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 23:29:04,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 23:29:04,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 23:29:04,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 23:29:04,262 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:29:05,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:29:05,437 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-12-27 23:29:05,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 23:29:05,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-27 23:29:05,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:29:05,525 INFO L225 Difference]: With dead ends: 20 [2021-12-27 23:29:05,525 INFO L226 Difference]: Without dead ends: 8 [2021-12-27 23:29:05,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 23:29:05,530 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 23:29:05,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-27 23:29:05,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-27 23:29:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-27 23:29:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:29:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-27 23:29:05,550 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-12-27 23:29:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:29:05,550 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-27 23:29:05,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:29:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-27 23:29:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-27 23:29:05,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:29:05,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:29:05,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-27 23:29:05,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 23:29:05,754 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:29:05,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:29:05,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-12-27 23:29:05,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 23:29:05,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488893501] [2021-12-27 23:29:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:29:05,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 23:29:05,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 23:29:05,757 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-27 23:29:05,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-27 23:29:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:29:06,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 23:29:06,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:29:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:29:08,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:29:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:29:19,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-27 23:29:19,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488893501] [2021-12-27 23:29:19,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488893501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:29:19,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 23:29:19,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-27 23:29:19,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678347212] [2021-12-27 23:29:19,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 23:29:19,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-27 23:29:19,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-27 23:29:19,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-27 23:29:19,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=27, Unknown=1, NotChecked=0, Total=42 [2021-12-27 23:29:19,213 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:29:21,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-27 23:29:30,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-27 23:29:31,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:29:31,771 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-12-27 23:29:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-27 23:29:31,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-27 23:29:31,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:29:31,773 INFO L225 Difference]: With dead ends: 14 [2021-12-27 23:29:31,773 INFO L226 Difference]: Without dead ends: 10 [2021-12-27 23:29:31,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=32, Invalid=57, Unknown=1, NotChecked=0, Total=90 [2021-12-27 23:29:31,774 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-12-27 23:29:31,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2021-12-27 23:29:31,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-27 23:29:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-12-27 23:29:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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) [2021-12-27 23:29:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-12-27 23:29:31,778 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-12-27 23:29:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:29:31,778 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-12-27 23:29:31,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:29:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-12-27 23:29:31,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-27 23:29:31,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:29:31,779 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-12-27 23:29:31,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-27 23:29:31,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-27 23:29:31,980 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:29:31,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:29:31,984 INFO L85 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 2 times [2021-12-27 23:29:31,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-27 23:29:31,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4051690] [2021-12-27 23:29:31,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 23:29:31,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-27 23:29:31,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-27 23:29:31,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-27 23:29:31,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-27 23:29:32,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 23:29:32,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 23:29:32,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-27 23:29:32,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:29:46,893 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-12-27 23:29:52,856 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (and (= |c_ULTIMATE.start_main_~x~0#1| (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0)) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-12-27 23:29:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 5 not checked. [2021-12-27 23:29:52,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:29:58,596 WARN L860 $PredicateComparison]: unable to prove that (or (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~x1~0#1|)) (fp.eq |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))) is different from true [2021-12-27 23:30:08,305 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false [2021-12-27 23:30:10,365 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from true [2021-12-27 23:30:20,991 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse1) .cse1))) (or (not (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 8 24) c_currentRoundingMode (_ bv0 32)))))) is different from false