./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 ff03de63 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-dev-ff03de6 [2021-12-21 11:52:49,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:52:49,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:52:49,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:52:49,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:52:49,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:52:49,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:52:49,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:52:49,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:52:49,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:52:49,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:52:49,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:52:49,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:52:49,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:52:49,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:52:49,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:52:49,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:52:49,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:52:49,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:52:49,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:52:49,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:52:49,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:52:49,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:52:49,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:52:49,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:52:49,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:52:49,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:52:49,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:52:49,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:52:49,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:52:49,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:52:49,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:52:49,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:52:49,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:52:49,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:52:49,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:52:49,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:52:49,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:52:49,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:52:49,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:52:49,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:52:49,219 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:52:49,243 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:52:49,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:52:49,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:52:49,244 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:52:49,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:52:49,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:52:49,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:52:49,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:52:49,245 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:52:49,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:52:49,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:52:49,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:52:49,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:52:49,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:52:49,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:52:49,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:52:49,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:52:49,247 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:52:49,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:52:49,247 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:52:49,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:52:49,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:52:49,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:52:49,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:52:49,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:52:49,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:52:49,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:52:49,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:52:49,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:52:49,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:52:49,249 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:52:49,250 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:52:49,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:52:49,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:52:49,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f4e199f6665b6821475945a72290dab8d4d620db3a5150842d6f2ec9f4c430d [2021-12-21 11:52:49,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:52:49,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:52:49,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:52:49,451 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:52:49,452 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:52:49,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Double_div.i [2021-12-21 11:52:49,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/714a9247d/5e3def7370794076a0c20d41fd237d83/FLAGb9546a173 [2021-12-21 11:52:49,848 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:52:49,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div.i [2021-12-21 11:52:49,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/714a9247d/5e3def7370794076a0c20d41fd237d83/FLAGb9546a173 [2021-12-21 11:52:49,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/714a9247d/5e3def7370794076a0c20d41fd237d83 [2021-12-21 11:52:49,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:52:49,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:52:49,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:52:49,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:52:49,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:52:49,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:52:49" (1/1) ... [2021-12-21 11:52:49,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248da0ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:49, skipping insertion in model container [2021-12-21 11:52:49,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:52:49" (1/1) ... [2021-12-21 11:52:49,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:52:49,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:52:49,998 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] [2021-12-21 11:52:50,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:52:50,013 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:52:50,020 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] [2021-12-21 11:52:50,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:52:50,028 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:52:50,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:50 WrapperNode [2021-12-21 11:52:50,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:52:50,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:52:50,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:52:50,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:52:50,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:50" (1/1) ... [2021-12-21 11:52:50,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:50" (1/1) ... [2021-12-21 11:52:50,046 INFO L137 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2021-12-21 11:52:50,046 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:52:50,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:52:50,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:52:50,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:52:50,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:50" (1/1) ... [2021-12-21 11:52:50,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:50" (1/1) ... [2021-12-21 11:52:50,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:50" (1/1) ... [2021-12-21 11:52:50,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:50" (1/1) ... [2021-12-21 11:52:50,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:50" (1/1) ... [2021-12-21 11:52:50,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:50" (1/1) ... [2021-12-21 11:52:50,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:50" (1/1) ... [2021-12-21 11:52:50,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:52:50,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:52:50,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:52:50,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:52:50,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:50" (1/1) ... [2021-12-21 11:52:50,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:52:50,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:52:50,083 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) [2021-12-21 11:52:50,104 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 [2021-12-21 11:52:50,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:52:50,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:52:50,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:52:50,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:52:50,154 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:52:50,156 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:52:50,223 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:52:50,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:52:50,227 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:52:50,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:52:50 BoogieIcfgContainer [2021-12-21 11:52:50,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:52:50,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:52:50,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:52:50,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:52:50,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:52:49" (1/3) ... [2021-12-21 11:52:50,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fdb95d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:52:50, skipping insertion in model container [2021-12-21 11:52:50,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:50" (2/3) ... [2021-12-21 11:52:50,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fdb95d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:52:50, skipping insertion in model container [2021-12-21 11:52:50,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:52:50" (3/3) ... [2021-12-21 11:52:50,235 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div.i [2021-12-21 11:52:50,238 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:52:50,238 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:52:50,267 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:52:50,272 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 [2021-12-21 11:52:50,272 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:52:50,281 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) [2021-12-21 11:52:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 11:52:50,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:52:50,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 11:52:50,285 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:52:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:52:50,289 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-21 11:52:50,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:52:50,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4498334] [2021-12-21 11:52:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:52:50,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:52:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 11:52:50,367 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 11:52:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 11:52:50,386 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 11:52:50,388 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 11:52:50,389 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 11:52:50,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:52:50,393 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-21 11:52:50,395 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 11:52:50,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:52:50 BoogieIcfgContainer [2021-12-21 11:52:50,430 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 11:52:50,430 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 11:52:50,431 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 11:52:50,431 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 11:52:50,431 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:52:50" (3/4) ... [2021-12-21 11:52:50,433 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-21 11:52:50,434 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 11:52:50,434 INFO L158 Benchmark]: Toolchain (without parser) took 563.32ms. Allocated memory is still 104.9MB. Free memory was 75.5MB in the beginning and 56.6MB in the end (delta: 18.9MB). Peak memory consumption was 17.7MB. Max. memory is 16.1GB. [2021-12-21 11:52:50,435 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 104.9MB. Free memory was 62.6MB in the beginning and 62.5MB in the end (delta: 41.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:52:50,436 INFO L158 Benchmark]: CACSL2BoogieTranslator took 157.18ms. Allocated memory is still 104.9MB. Free memory was 75.5MB in the beginning and 80.4MB in the end (delta: -4.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 11:52:50,436 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.29ms. Allocated memory is still 104.9MB. Free memory was 80.4MB in the beginning and 78.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 11:52:50,439 INFO L158 Benchmark]: Boogie Preprocessor took 14.81ms. Allocated memory is still 104.9MB. Free memory was 78.9MB in the beginning and 77.9MB in the end (delta: 990.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:52:50,440 INFO L158 Benchmark]: RCFGBuilder took 167.37ms. Allocated memory is still 104.9MB. Free memory was 77.9MB in the beginning and 69.5MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 11:52:50,440 INFO L158 Benchmark]: TraceAbstraction took 200.06ms. Allocated memory is still 104.9MB. Free memory was 69.1MB in the beginning and 56.9MB in the end (delta: 12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 11:52:50,441 INFO L158 Benchmark]: Witness Printer took 3.22ms. Allocated memory is still 104.9MB. Free memory was 56.9MB in the beginning and 56.6MB in the end (delta: 361.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 11:52:50,443 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 104.9MB. Free memory was 62.6MB in the beginning and 62.5MB in the end (delta: 41.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 157.18ms. Allocated memory is still 104.9MB. Free memory was 75.5MB in the beginning and 80.4MB in the end (delta: -4.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 16.29ms. Allocated memory is still 104.9MB. Free memory was 80.4MB in the beginning and 78.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.81ms. Allocated memory is still 104.9MB. Free memory was 78.9MB in the beginning and 77.9MB in the end (delta: 990.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 167.37ms. Allocated memory is still 104.9MB. Free memory was 77.9MB in the beginning and 69.5MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 200.06ms. Allocated memory is still 104.9MB. Free memory was 69.1MB in the beginning and 56.9MB in the end (delta: 12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Witness Printer took 3.22ms. Allocated memory is still 104.9MB. Free memory was 56.9MB in the beginning and 56.6MB in the end (delta: 361.7kB). Peak memory consumption was 2.1MB. 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 [2021-12-21 11:52:50,476 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-dev-ff03de6 [2021-12-21 11:52:52,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:52:52,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:52:52,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:52:52,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:52:52,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:52:52,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:52:52,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:52:52,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:52:52,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:52:52,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:52:52,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:52:52,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:52:52,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:52:52,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:52:52,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:52:52,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:52:52,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:52:52,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:52:52,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:52:52,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:52:52,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:52:52,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:52:52,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:52:52,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:52:52,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:52:52,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:52:52,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:52:52,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:52:52,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:52:52,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:52:52,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:52:52,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:52:52,267 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:52:52,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:52:52,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:52:52,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:52:52,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:52:52,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:52:52,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:52:52,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:52:52,273 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-21 11:52:52,294 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:52:52,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:52:52,295 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:52:52,295 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:52:52,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:52:52,296 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:52:52,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:52:52,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:52:52,297 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:52:52,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:52:52,298 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:52:52,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:52:52,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:52:52,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:52:52,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:52:52,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:52:52,299 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 11:52:52,300 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 11:52:52,300 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 11:52:52,300 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:52:52,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:52:52,300 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:52:52,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:52:52,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:52:52,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:52:52,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:52:52,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:52:52,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:52:52,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:52:52,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:52:52,307 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 11:52:52,307 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 11:52:52,308 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:52:52,308 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:52:52,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:52:52,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:52:52,308 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 11:52:52,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f4e199f6665b6821475945a72290dab8d4d620db3a5150842d6f2ec9f4c430d [2021-12-21 11:52:52,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:52:52,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:52:52,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:52:52,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:52:52,555 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:52:52,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Double_div.i [2021-12-21 11:52:52,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b6c38266/3462add4632547be93f8bbc113e3810b/FLAGc1a1313c2 [2021-12-21 11:52:52,964 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:52:52,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div.i [2021-12-21 11:52:52,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b6c38266/3462add4632547be93f8bbc113e3810b/FLAGc1a1313c2 [2021-12-21 11:52:53,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b6c38266/3462add4632547be93f8bbc113e3810b [2021-12-21 11:52:53,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:52:53,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:52:53,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:52:53,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:52:53,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:52:53,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:52:53" (1/1) ... [2021-12-21 11:52:53,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c1d9c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:53, skipping insertion in model container [2021-12-21 11:52:53,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:52:53" (1/1) ... [2021-12-21 11:52:53,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:52:53,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:52:53,516 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] [2021-12-21 11:52:53,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:52:53,539 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:52:53,551 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] [2021-12-21 11:52:53,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:52:53,594 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:52:53,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:53 WrapperNode [2021-12-21 11:52:53,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:52:53,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:52:53,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:52:53,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:52:53,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:53" (1/1) ... [2021-12-21 11:52:53,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:53" (1/1) ... [2021-12-21 11:52:53,630 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2021-12-21 11:52:53,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:52:53,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:52:53,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:52:53,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:52:53,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:53" (1/1) ... [2021-12-21 11:52:53,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:53" (1/1) ... [2021-12-21 11:52:53,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:53" (1/1) ... [2021-12-21 11:52:53,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:53" (1/1) ... [2021-12-21 11:52:53,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:53" (1/1) ... [2021-12-21 11:52:53,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:53" (1/1) ... [2021-12-21 11:52:53,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:53" (1/1) ... [2021-12-21 11:52:53,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:52:53,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:52:53,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:52:53,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:52:53,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:53" (1/1) ... [2021-12-21 11:52:53,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:52:53,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:52:53,703 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) [2021-12-21 11:52:53,708 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 [2021-12-21 11:52:53,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:52:53,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 11:52:53,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:52:53,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:52:53,773 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:52:53,774 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:52:56,680 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:52:56,685 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:52:56,685 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:52:56,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:52:56 BoogieIcfgContainer [2021-12-21 11:52:56,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:52:56,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:52:56,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:52:56,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:52:56,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:52:53" (1/3) ... [2021-12-21 11:52:56,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744aa488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:52:56, skipping insertion in model container [2021-12-21 11:52:56,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:53" (2/3) ... [2021-12-21 11:52:56,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744aa488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:52:56, skipping insertion in model container [2021-12-21 11:52:56,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:52:56" (3/3) ... [2021-12-21 11:52:56,691 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div.i [2021-12-21 11:52:56,694 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:52:56,695 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:52:56,732 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:52:56,737 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 [2021-12-21 11:52:56,737 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:52:56,749 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) [2021-12-21 11:52:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 11:52:56,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:52:56,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 11:52:56,774 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:52:56,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:52:56,778 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-21 11:52:56,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:52:56,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340404504] [2021-12-21 11:52:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:52:56,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:52:56,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:52:56,798 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) [2021-12-21 11:52:56,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 11:52:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:52:56,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:52:56,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:53:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:53:05,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:53:05,010 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:53:05,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340404504] [2021-12-21 11:53:05,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340404504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:53:05,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:53:05,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:53:05,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981165524] [2021-12-21 11:53:05,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:53:05,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:53:05,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:53:05,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:53:05,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:53:05,038 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) [2021-12-21 11:53:09,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 11:53:11,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:53:11,132 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-12-21 11:53:11,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:53:11,135 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 [2021-12-21 11:53:11,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:53:11,141 INFO L225 Difference]: With dead ends: 20 [2021-12-21 11:53:11,141 INFO L226 Difference]: Without dead ends: 8 [2021-12-21 11:53:11,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:53:11,147 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:53:11,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-21 11:53:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-21 11:53:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-21 11:53:11,177 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) [2021-12-21 11:53:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-21 11:53:11,179 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-12-21 11:53:11,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:53:11,179 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-21 11:53:11,179 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) [2021-12-21 11:53:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-21 11:53:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 11:53:11,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:53:11,180 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:53:11,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:53:11,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 11:53:11,385 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:53:11,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:53:11,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-12-21 11:53:11,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:53:11,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249797163] [2021-12-21 11:53:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:53:11,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:53:11,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:53:11,393 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) [2021-12-21 11:53:11,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 11:53:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:53:11,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 11:53:11,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:53:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:53:18,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:53:25,209 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 [2021-12-21 11:53:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-21 11:53:27,944 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:53:27,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249797163] [2021-12-21 11:53:27,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249797163] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:53:27,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 11:53:27,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-21 11:53:27,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253672684] [2021-12-21 11:53:27,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 11:53:27,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 11:53:27,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:53:27,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 11:53:27,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=20, Unknown=1, NotChecked=8, Total=42 [2021-12-21 11:53:27,946 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) [2021-12-21 11:53:31,074 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (and (= |c_ULTIMATE.start_main_~x1~0#1| (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0)) (not (fp.eq |c_ULTIMATE.start_main_~x1~0#1| |c_ULTIMATE.start_main_~x~0#1|)) (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~x1~0#1| .cse0) |c_ULTIMATE.start_main_~x1~0#1|)) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-12-21 11:53:32,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 11:53:34,961 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 11:53:37,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 11:53:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:53:37,552 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-12-21 11:53:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 11:53:37,552 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 [2021-12-21 11:53:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:53:37,553 INFO L225 Difference]: With dead ends: 14 [2021-12-21 11:53:37,553 INFO L226 Difference]: Without dead ends: 10 [2021-12-21 11:53:37,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=15, Invalid=21, Unknown=2, NotChecked=18, Total=56 [2021-12-21 11:53:37,554 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s 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, 7.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:53:37,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 15 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 2 Unknown, 6 Unchecked, 7.4s Time] [2021-12-21 11:53:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-21 11:53:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-12-21 11:53:37,556 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) [2021-12-21 11:53:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-12-21 11:53:37,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-12-21 11:53:37,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:53:37,557 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-12-21 11:53:37,557 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) [2021-12-21 11:53:37,557 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-12-21 11:53:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 11:53:37,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:53:37,557 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-12-21 11:53:37,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-21 11:53:37,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 11:53:37,764 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:53:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:53:37,766 INFO L85 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 2 times [2021-12-21 11:53:37,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:53:37,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613242582] [2021-12-21 11:53:37,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 11:53:37,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:53:37,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:53:37,768 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) [2021-12-21 11:53:37,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 11:53:38,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 11:53:38,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 11:53:38,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 11:53:38,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:53:42,747 WARN L860 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0)) |c_ULTIMATE.start_main_~x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-12-21 11:53:50,425 WARN L860 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 5.0 2.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0)) |c_ULTIMATE.start_main_~x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-12-21 11:53:59,440 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)