./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-esbmc-regression/Double_div.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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 -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 2f4e199f6665b6821475945a72290dab8d4d620db3a5150842d6f2ec9f4c430d --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:27:19,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:27:19,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:27:19,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:27:19,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:27:19,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:27:19,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:27:19,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:27:19,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:27:19,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:27:19,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:27:19,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:27:19,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:27:19,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:27:19,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:27:19,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:27:19,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:27:19,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:27:19,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:27:19,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:27:19,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:27:19,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:27:19,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:27:19,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:27:19,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:27:19,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:27:19,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:27:19,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:27:19,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:27:19,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:27:19,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:27:19,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:27:19,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:27:19,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:27:19,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:27:19,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:27:19,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:27:19,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:27:19,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:27:19,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:27:19,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:27:19,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:27:19,978 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:27:19,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:27:19,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:27:19,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:27:19,979 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:27:19,980 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:27:19,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:27:19,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:27:19,980 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:27:19,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:27:19,981 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:27:19,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:27:19,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:27:19,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:27:19,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:27:19,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:27:19,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:27:19,982 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:27:19,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:27:19,982 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:27:19,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:27:19,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:27:19,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:27:19,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:27:19,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:27:19,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:27:19,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:27:19,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:27:19,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:27:19,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:27:19,985 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:27:19,985 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:27:19,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:27:19,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:27:19,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f4e199f6665b6821475945a72290dab8d4d620db3a5150842d6f2ec9f4c430d [2021-12-15 10:27:20,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:27:20,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:27:20,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:27:20,152 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:27:20,152 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:27:20,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Double_div.i [2021-12-15 10:27:20,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99f33a349/b79f229ff8a444aeae3755cfdf94e2dc/FLAGb5b591c11 [2021-12-15 10:27:20,564 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:27:20,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div.i [2021-12-15 10:27:20,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99f33a349/b79f229ff8a444aeae3755cfdf94e2dc/FLAGb5b591c11 [2021-12-15 10:27:21,006 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99f33a349/b79f229ff8a444aeae3755cfdf94e2dc [2021-12-15 10:27:21,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:27:21,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:27:21,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:27:21,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:27:21,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:27:21,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:27:21" (1/1) ... [2021-12-15 10:27:21,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a9362a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:21, skipping insertion in model container [2021-12-15 10:27:21,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:27:21" (1/1) ... [2021-12-15 10:27:21,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:27:21,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:27:21,151 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[804,817] [2021-12-15 10:27:21,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:27:21,168 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:27:21,178 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[804,817] [2021-12-15 10:27:21,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:27:21,190 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:27:21,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:21 WrapperNode [2021-12-15 10:27:21,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:27:21,193 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:27:21,193 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:27:21,193 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:27:21,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:21" (1/1) ... [2021-12-15 10:27:21,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:21" (1/1) ... [2021-12-15 10:27:21,216 INFO L137 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2021-12-15 10:27:21,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:27:21,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:27:21,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:27:21,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:27:21,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:21" (1/1) ... [2021-12-15 10:27:21,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:21" (1/1) ... [2021-12-15 10:27:21,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:21" (1/1) ... [2021-12-15 10:27:21,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:21" (1/1) ... [2021-12-15 10:27:21,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:21" (1/1) ... [2021-12-15 10:27:21,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:21" (1/1) ... [2021-12-15 10:27:21,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:21" (1/1) ... [2021-12-15 10:27:21,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:27:21,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:27:21,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:27:21,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:27:21,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:21" (1/1) ... [2021-12-15 10:27:21,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:27:21,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:27:21,264 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) [2021-12-15 10:27:21,266 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 [2021-12-15 10:27:21,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:27:21,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:27:21,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:27:21,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:27:21,326 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:27:21,327 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:27:21,382 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:27:21,385 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:27:21,385 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 10:27:21,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:27:21 BoogieIcfgContainer [2021-12-15 10:27:21,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:27:21,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:27:21,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:27:21,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:27:21,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:27:21" (1/3) ... [2021-12-15 10:27:21,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570062ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:27:21, skipping insertion in model container [2021-12-15 10:27:21,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:21" (2/3) ... [2021-12-15 10:27:21,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570062ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:27:21, skipping insertion in model container [2021-12-15 10:27:21,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:27:21" (3/3) ... [2021-12-15 10:27:21,391 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div.i [2021-12-15 10:27:21,394 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:27:21,394 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:27:21,420 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:27:21,425 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 [2021-12-15 10:27:21,425 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:27:21,432 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) [2021-12-15 10:27:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 10:27:21,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:27:21,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 10:27:21,436 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:27:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:27:21,439 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-15 10:27:21,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:27:21,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100445198] [2021-12-15 10:27:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:27:21,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:27:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 10:27:21,495 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 10:27:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 10:27:21,510 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 10:27:21,514 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-15 10:27:21,515 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 10:27:21,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:27:21,519 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-15 10:27:21,521 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 10:27:21,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 10:27:21 BoogieIcfgContainer [2021-12-15 10:27:21,533 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 10:27:21,536 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 10:27:21,536 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 10:27:21,536 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 10:27:21,537 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:27:21" (3/4) ... [2021-12-15 10:27:21,538 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-15 10:27:21,538 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 10:27:21,541 INFO L158 Benchmark]: Toolchain (without parser) took 531.43ms. Allocated memory was 86.0MB in the beginning and 109.1MB in the end (delta: 23.1MB). Free memory was 53.4MB in the beginning and 61.2MB in the end (delta: -7.8MB). Peak memory consumption was 15.8MB. Max. memory is 16.1GB. [2021-12-15 10:27:21,542 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 86.0MB. Free memory is still 42.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:27:21,543 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.99ms. Allocated memory was 86.0MB in the beginning and 109.1MB in the end (delta: 23.1MB). Free memory was 53.2MB in the beginning and 85.1MB in the end (delta: -31.9MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. [2021-12-15 10:27:21,543 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.26ms. Allocated memory is still 109.1MB. Free memory was 85.1MB in the beginning and 83.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 10:27:21,544 INFO L158 Benchmark]: Boogie Preprocessor took 18.00ms. Allocated memory is still 109.1MB. Free memory was 83.6MB in the beginning and 83.0MB in the end (delta: 611.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:27:21,546 INFO L158 Benchmark]: RCFGBuilder took 149.99ms. Allocated memory is still 109.1MB. Free memory was 82.8MB in the beginning and 74.4MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 10:27:21,546 INFO L158 Benchmark]: TraceAbstraction took 145.74ms. Allocated memory is still 109.1MB. Free memory was 73.8MB in the beginning and 61.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-15 10:27:21,546 INFO L158 Benchmark]: Witness Printer took 2.48ms. Allocated memory is still 109.1MB. Free memory is still 61.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 10:27:21,548 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 86.0MB. Free memory is still 42.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 180.99ms. Allocated memory was 86.0MB in the beginning and 109.1MB in the end (delta: 23.1MB). Free memory was 53.2MB in the beginning and 85.1MB in the end (delta: -31.9MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.26ms. Allocated memory is still 109.1MB. Free memory was 85.1MB in the beginning and 83.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.00ms. Allocated memory is still 109.1MB. Free memory was 83.6MB in the beginning and 83.0MB in the end (delta: 611.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 149.99ms. Allocated memory is still 109.1MB. Free memory was 82.8MB in the beginning and 74.4MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 145.74ms. Allocated memory is still 109.1MB. Free memory was 73.8MB in the beginning and 61.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 2.48ms. Allocated memory is still 109.1MB. Free memory is still 61.2MB. 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 someBinaryDOUBLEComparisonOperation at line 29, overapproximation of someBinaryArithmeticDOUBLEoperation at line 21. Possible FailurePath: [L20] double x = 1.0; [L21] double x1 = x/2.5; 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 [2021-12-15 10:27:21,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-esbmc-regression/Double_div.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 2f4e199f6665b6821475945a72290dab8d4d620db3a5150842d6f2ec9f4c430d --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:27:23,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:27:23,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:27:23,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:27:23,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:27:23,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:27:23,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:27:23,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:27:23,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:27:23,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:27:23,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:27:23,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:27:23,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:27:23,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:27:23,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:27:23,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:27:23,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:27:23,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:27:23,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:27:23,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:27:23,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:27:23,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:27:23,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:27:23,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:27:23,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:27:23,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:27:23,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:27:23,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:27:23,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:27:23,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:27:23,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:27:23,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:27:23,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:27:23,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:27:23,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:27:23,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:27:23,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:27:23,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:27:23,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:27:23,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:27:23,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:27:23,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 10:27:23,504 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:27:23,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:27:23,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:27:23,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:27:23,506 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:27:23,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:27:23,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:27:23,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:27:23,507 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:27:23,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:27:23,507 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:27:23,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:27:23,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:27:23,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:27:23,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:27:23,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:27:23,508 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 10:27:23,508 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 10:27:23,508 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 10:27:23,508 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:27:23,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:27:23,509 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:27:23,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:27:23,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:27:23,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:27:23,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:27:23,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:27:23,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:27:23,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:27:23,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:27:23,510 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 10:27:23,510 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 10:27:23,510 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:27:23,511 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:27:23,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:27:23,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:27:23,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 10:27:23,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f4e199f6665b6821475945a72290dab8d4d620db3a5150842d6f2ec9f4c430d [2021-12-15 10:27:23,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:27:23,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:27:23,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:27:23,802 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:27:23,803 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:27:23,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Double_div.i [2021-12-15 10:27:23,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96c7ff744/44b909bc65654b69b9252ccff453ebcc/FLAG992943ca6 [2021-12-15 10:27:24,268 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:27:24,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div.i [2021-12-15 10:27:24,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96c7ff744/44b909bc65654b69b9252ccff453ebcc/FLAG992943ca6 [2021-12-15 10:27:24,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96c7ff744/44b909bc65654b69b9252ccff453ebcc [2021-12-15 10:27:24,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:27:24,289 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:27:24,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:27:24,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:27:24,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:27:24,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:27:24" (1/1) ... [2021-12-15 10:27:24,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a0c9921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:24, skipping insertion in model container [2021-12-15 10:27:24,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:27:24" (1/1) ... [2021-12-15 10:27:24,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:27:24,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:27:24,412 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[804,817] [2021-12-15 10:27:24,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:27:24,432 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:27:24,453 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[804,817] [2021-12-15 10:27:24,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:27:24,479 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:27:24,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:24 WrapperNode [2021-12-15 10:27:24,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:27:24,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:27:24,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:27:24,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:27:24,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:24" (1/1) ... [2021-12-15 10:27:24,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:24" (1/1) ... [2021-12-15 10:27:24,504 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2021-12-15 10:27:24,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:27:24,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:27:24,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:27:24,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:27:24,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:24" (1/1) ... [2021-12-15 10:27:24,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:24" (1/1) ... [2021-12-15 10:27:24,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:24" (1/1) ... [2021-12-15 10:27:24,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:24" (1/1) ... [2021-12-15 10:27:24,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:24" (1/1) ... [2021-12-15 10:27:24,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:24" (1/1) ... [2021-12-15 10:27:24,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:24" (1/1) ... [2021-12-15 10:27:24,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:27:24,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:27:24,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:27:24,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:27:24,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:24" (1/1) ... [2021-12-15 10:27:24,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:27:24,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:27:24,574 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) [2021-12-15 10:27:24,635 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 [2021-12-15 10:27:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:27:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 10:27:24,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:27:24,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:27:24,708 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:27:24,709 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:27:25,994 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:27:25,998 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:27:25,998 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 10:27:25,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:27:25 BoogieIcfgContainer [2021-12-15 10:27:25,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:27:26,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:27:26,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:27:26,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:27:26,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:27:24" (1/3) ... [2021-12-15 10:27:26,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ef0302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:27:26, skipping insertion in model container [2021-12-15 10:27:26,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:27:24" (2/3) ... [2021-12-15 10:27:26,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ef0302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:27:26, skipping insertion in model container [2021-12-15 10:27:26,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:27:25" (3/3) ... [2021-12-15 10:27:26,013 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div.i [2021-12-15 10:27:26,016 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:27:26,016 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:27:26,076 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:27:26,087 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 [2021-12-15 10:27:26,092 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:27:26,101 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) [2021-12-15 10:27:26,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 10:27:26,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:27:26,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 10:27:26,111 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:27:26,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:27:26,115 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-15 10:27:26,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 10:27:26,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907439350] [2021-12-15 10:27:26,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:27:26,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 10:27:26,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 10:27:26,126 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) [2021-12-15 10:27:26,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 10:27:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:27:26,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 10:27:26,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:27:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:27:32,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:27:32,086 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 10:27:32,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907439350] [2021-12-15 10:27:32,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907439350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:27:32,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:27:32,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:27:32,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396541509] [2021-12-15 10:27:32,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:27:32,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:27:32,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 10:27:32,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:27:32,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:27:32,115 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) [2021-12-15 10:27:36,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:27:36,764 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-12-15 10:27:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:27:36,766 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 [2021-12-15 10:27:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:27:36,776 INFO L225 Difference]: With dead ends: 20 [2021-12-15 10:27:36,776 INFO L226 Difference]: Without dead ends: 8 [2021-12-15 10:27:36,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:27:36,780 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:27:36,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 10:27:36,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-15 10:27:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-15 10:27:36,798 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) [2021-12-15 10:27:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-15 10:27:36,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-12-15 10:27:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:27:36,800 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-15 10:27:36,800 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) [2021-12-15 10:27:36,800 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-15 10:27:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 10:27:36,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:27:36,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:27:36,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-15 10:27:37,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 10:27:37,013 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:27:37,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:27:37,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-12-15 10:27:37,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 10:27:37,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770518085] [2021-12-15 10:27:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:27:37,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 10:27:37,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 10:27:37,016 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) [2021-12-15 10:27:37,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-15 10:27:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:27:37,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 10:27:37,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:27:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:27:43,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:27:51,910 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0))) |c_ULTIMATE.start_main_~x1~0#1|)) is different from false [2021-12-15 10:27:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-15 10:27:54,604 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 10:27:54,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770518085] [2021-12-15 10:27:54,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770518085] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:27:54,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 10:27:54,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-15 10:27:54,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468935611] [2021-12-15 10:27:54,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 10:27:54,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 10:27:54,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 10:27:54,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 10:27:54,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=19, Unknown=2, NotChecked=8, Total=42 [2021-12-15 10:27:54,606 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) [2021-12-15 10:27:58,073 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (= c_currentRoundingMode roundNearestTiesToEven) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0) |c_ULTIMATE.start_main_~x1~0#1|)) (not (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|)) (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)))) is different from true [2021-12-15 10:27:59,354 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-15 10:28:02,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-15 10:28:04,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-15 10:28:04,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:28:04,619 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-12-15 10:28:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 10:28:04,624 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 [2021-12-15 10:28:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:28:04,624 INFO L225 Difference]: With dead ends: 14 [2021-12-15 10:28:04,624 INFO L226 Difference]: Without dead ends: 10 [2021-12-15 10:28:04,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=15, Invalid=20, Unknown=3, NotChecked=18, Total=56 [2021-12-15 10:28:04,625 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:28:04,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 15 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 2 Unknown, 6 Unchecked, 7.8s Time] [2021-12-15 10:28:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-15 10:28:04,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-12-15 10:28:04,627 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) [2021-12-15 10:28:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-12-15 10:28:04,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-12-15 10:28:04,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:28:04,628 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-12-15 10:28:04,628 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) [2021-12-15 10:28:04,628 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-12-15 10:28:04,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 10:28:04,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:28:04,629 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-12-15 10:28:04,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-15 10:28:04,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 10:28:04,829 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:28:04,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:28:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 2 times [2021-12-15 10:28:04,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 10:28:04,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956350491] [2021-12-15 10:28:04,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:28:04,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 10:28:04,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 10:28:04,832 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) [2021-12-15 10:28:04,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-15 10:28:05,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:28:05,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:28:05,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-15 10:28:05,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:28:09,763 WARN L860 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0)))) is different from true [2021-12-15 10:28:17,285 WARN L860 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_main_~x1~0#1| (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)))) is different from true [2021-12-15 10:28:22,643 WARN L227 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-15 10:28:28,438 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_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)))) is different from false [2021-12-15 10:28:31,514 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_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)))) is different from true [2021-12-15 10:28:36,864 WARN L227 SmtUtils]: Spent 5.34s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-15 10:28:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-12-15 10:28:41,733 INFO L328 TraceCheckSpWp]: Computing backward predicates...