./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c --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_bad.i.p+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:52:53,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:52:53,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:52:53,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:52:53,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:52:53,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:52:53,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:52:53,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:52:53,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:52:53,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:52:53,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:52:53,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:52:53,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:52:53,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:52:53,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:52:53,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:52:53,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:52:53,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:52:53,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:52:53,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:52:53,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:52:53,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:52:53,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:52:53,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:52:53,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:52:53,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:52:53,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:52:53,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:52:53,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:52:53,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:52:53,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:52:53,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:52:53,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:52:53,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:52:53,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:52:53,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:52:53,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:52:53,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:52:53,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:52:53,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:52:53,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:52:53,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:52:53,182 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:52:53,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:52:53,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:52:53,186 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:52:53,187 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:52:53,187 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:52:53,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:52:53,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:52:53,187 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:52:53,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:52:53,188 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:52:53,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:52:53,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:52:53,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:52:53,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:52:53,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:52:53,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:52:53,189 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:52:53,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:52:53,189 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:52:53,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:52:53,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:52:53,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:52:53,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:52:53,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:52:53,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:52:53,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:52:53,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:52:53,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:52:53,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:52:53,192 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:52:53,192 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:52:53,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:52:53,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:52:53,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a [2021-12-21 11:52:53,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:52:53,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:52:53,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:52:53,436 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:52:53,436 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:52:53,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-12-21 11:52:53,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c4f74ecc/521132b831254b648004c4965e8c0f95/FLAGdf086b2f9 [2021-12-21 11:52:53,849 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:52:53,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-12-21 11:52:53,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c4f74ecc/521132b831254b648004c4965e8c0f95/FLAGdf086b2f9 [2021-12-21 11:52:53,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c4f74ecc/521132b831254b648004c4965e8c0f95 [2021-12-21 11:52:53,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:52:53,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:52:53,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:52:53,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:52:53,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:52:53,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:52:53" (1/1) ... [2021-12-21 11:52:53,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5569a3b4 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 11:52:53,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:52:53" (1/1) ... [2021-12-21 11:52:53,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:52:53,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:52:54,052 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_bad.i.p+cfa-reducer.c[674,687] [2021-12-21 11:52:54,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:52:54,062 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:52:54,088 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_bad.i.p+cfa-reducer.c[674,687] [2021-12-21 11:52:54,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:52:54,099 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:52:54,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:54 WrapperNode [2021-12-21 11:52:54,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:52:54,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:52:54,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:52:54,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:52:54,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:54" (1/1) ... [2021-12-21 11:52:54,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:54" (1/1) ... [2021-12-21 11:52:54,141 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 28 [2021-12-21 11:52:54,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:52:54,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:52:54,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:52:54,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:52:54,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:54" (1/1) ... [2021-12-21 11:52:54,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:54" (1/1) ... [2021-12-21 11:52:54,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:54" (1/1) ... [2021-12-21 11:52:54,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:54" (1/1) ... [2021-12-21 11:52:54,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:54" (1/1) ... [2021-12-21 11:52:54,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:54" (1/1) ... [2021-12-21 11:52:54,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:54" (1/1) ... [2021-12-21 11:52:54,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:52:54,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:52:54,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:52:54,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:52:54,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:54" (1/1) ... [2021-12-21 11:52:54,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:52:54,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:52:54,187 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 11:52:54,213 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 11:52:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:52:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:52:54,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:52:54,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:52:54,274 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:52:54,275 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:52:54,348 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:52:54,352 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:52:54,352 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 11:52:54,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:52:54 BoogieIcfgContainer [2021-12-21 11:52:54,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:52:54,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:52:54,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:52:54,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:52:54,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:52:53" (1/3) ... [2021-12-21 11:52:54,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ec23ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:52:54, skipping insertion in model container [2021-12-21 11:52:54,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:54" (2/3) ... [2021-12-21 11:52:54,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ec23ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:52:54, skipping insertion in model container [2021-12-21 11:52:54,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:52:54" (3/3) ... [2021-12-21 11:52:54,359 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i.p+cfa-reducer.c [2021-12-21 11:52:54,362 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:52:54,362 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:52:54,391 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:52:54,396 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 11:52:54,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:52:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:52:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-21 11:52:54,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:52:54,409 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-21 11:52:54,410 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:52:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:52:54,413 INFO L85 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2021-12-21 11:52:54,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:52:54,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173336924] [2021-12-21 11:52:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:52:54,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:52:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 11:52:54,481 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 11:52:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 11:52:54,514 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 11:52:54,515 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 11:52:54,517 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 11:52:54,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:52:54,521 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-21 11:52:54,523 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 11:52:54,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:52:54 BoogieIcfgContainer [2021-12-21 11:52:54,542 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 11:52:54,544 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 11:52:54,544 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 11:52:54,545 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 11:52:54,545 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:52:54" (3/4) ... [2021-12-21 11:52:54,548 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-21 11:52:54,548 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 11:52:54,549 INFO L158 Benchmark]: Toolchain (without parser) took 674.45ms. Allocated memory is still 119.5MB. Free memory was 90.3MB in the beginning and 70.8MB in the end (delta: 19.6MB). Peak memory consumption was 18.0MB. Max. memory is 16.1GB. [2021-12-21 11:52:54,550 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 86.0MB. Free memory was 44.4MB in the beginning and 44.3MB in the end (delta: 48.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:52:54,551 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.62ms. Allocated memory is still 119.5MB. Free memory was 90.3MB in the beginning and 95.6MB in the end (delta: -5.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 11:52:54,552 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.46ms. Allocated memory is still 119.5MB. Free memory was 95.6MB in the beginning and 94.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 11:52:54,552 INFO L158 Benchmark]: Boogie Preprocessor took 18.02ms. Allocated memory is still 119.5MB. Free memory was 94.2MB in the beginning and 93.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:52:54,556 INFO L158 Benchmark]: RCFGBuilder took 192.11ms. Allocated memory is still 119.5MB. Free memory was 93.1MB in the beginning and 84.8MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 11:52:54,556 INFO L158 Benchmark]: TraceAbstraction took 187.65ms. Allocated memory is still 119.5MB. Free memory was 84.4MB in the beginning and 71.1MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-21 11:52:54,557 INFO L158 Benchmark]: Witness Printer took 4.02ms. Allocated memory is still 119.5MB. Free memory was 71.1MB in the beginning and 70.8MB in the end (delta: 340.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 11:52:54,562 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 was 44.4MB in the beginning and 44.3MB in the end (delta: 48.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 240.62ms. Allocated memory is still 119.5MB. Free memory was 90.3MB in the beginning and 95.6MB in the end (delta: -5.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.46ms. Allocated memory is still 119.5MB. Free memory was 95.6MB in the beginning and 94.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.02ms. Allocated memory is still 119.5MB. Free memory was 94.2MB in the beginning and 93.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 192.11ms. Allocated memory is still 119.5MB. Free memory was 93.1MB in the beginning and 84.8MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 187.65ms. Allocated memory is still 119.5MB. Free memory was 84.4MB in the beginning and 71.1MB in the end (delta: 13.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 4.02ms. Allocated memory is still 119.5MB. Free memory was 71.1MB in the beginning and 70.8MB in the end (delta: 340.0kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 12, overapproximation of someBinaryArithmeticDOUBLEoperation at line 10. Possible FailurePath: [L1] int __return_main; VAL [__return_main=0] [L9] double main__x = 1.0; [L10] double main__x1 = main__x / 1.6; VAL [__return_main=0, main__x=1] [L12] COND FALSE !(main__x1 != main__x) [L21] int __tmp_1; [L22] __tmp_1 = main__x == 0 [L23] int __VERIFIER_assert__cond; [L24] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L25] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L27] reach_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.1s, 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=9occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-21 11:52:54,589 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_bad.i.p+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:52:56,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:52:56,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:52:56,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:52:56,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:52:56,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:52:56,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:52:56,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:52:56,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:52:56,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:52:56,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:52:56,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:52:56,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:52:56,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:52:56,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:52:56,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:52:56,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:52:56,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:52:56,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:52:56,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:52:56,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:52:56,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:52:56,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:52:56,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:52:56,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:52:56,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:52:56,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:52:56,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:52:56,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:52:56,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:52:56,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:52:56,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:52:56,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:52:56,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:52:56,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:52:56,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:52:56,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:52:56,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:52:56,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:52:56,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:52:56,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:52:56,388 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-21 11:52:56,415 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:52:56,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:52:56,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:52:56,417 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:52:56,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:52:56,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:52:56,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:52:56,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:52:56,418 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:52:56,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:52:56,419 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:52:56,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:52:56,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:52:56,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:52:56,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:52:56,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:52:56,420 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 11:52:56,420 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 11:52:56,420 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 11:52:56,420 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:52:56,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:52:56,421 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:52:56,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:52:56,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:52:56,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:52:56,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:52:56,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:52:56,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:52:56,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:52:56,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:52:56,422 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 11:52:56,422 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 11:52:56,423 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:52:56,423 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:52:56,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:52:56,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:52:56,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 11:52:56,423 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dd2b259de573dae381590d9c9a53c821e05ecea3ef79b47acb4a28edd56bf9a [2021-12-21 11:52:56,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:52:56,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:52:56,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:52:56,694 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:52:56,695 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:52:56,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-12-21 11:52:56,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d87fac457/7332e9cb19064470b2ca17d091fb7bfe/FLAGb73c65467 [2021-12-21 11:52:57,079 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:52:57,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad.i.p+cfa-reducer.c [2021-12-21 11:52:57,084 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d87fac457/7332e9cb19064470b2ca17d091fb7bfe/FLAGb73c65467 [2021-12-21 11:52:57,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d87fac457/7332e9cb19064470b2ca17d091fb7bfe [2021-12-21 11:52:57,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:52:57,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:52:57,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:52:57,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:52:57,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:52:57,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:52:57" (1/1) ... [2021-12-21 11:52:57,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28295d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:57, skipping insertion in model container [2021-12-21 11:52:57,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:52:57" (1/1) ... [2021-12-21 11:52:57,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:52:57,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:52:57,629 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_bad.i.p+cfa-reducer.c[674,687] [2021-12-21 11:52:57,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:52:57,642 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:52:57,651 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_bad.i.p+cfa-reducer.c[674,687] [2021-12-21 11:52:57,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:52:57,668 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:52:57,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:57 WrapperNode [2021-12-21 11:52:57,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:52:57,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:52:57,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:52:57,669 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:52:57,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:57" (1/1) ... [2021-12-21 11:52:57,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:57" (1/1) ... [2021-12-21 11:52:57,698 INFO L137 Inliner]: procedures = 13, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2021-12-21 11:52:57,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:52:57,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:52:57,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:52:57,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:52:57,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:57" (1/1) ... [2021-12-21 11:52:57,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:57" (1/1) ... [2021-12-21 11:52:57,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:57" (1/1) ... [2021-12-21 11:52:57,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:57" (1/1) ... [2021-12-21 11:52:57,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:57" (1/1) ... [2021-12-21 11:52:57,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:57" (1/1) ... [2021-12-21 11:52:57,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:57" (1/1) ... [2021-12-21 11:52:57,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:52:57,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:52:57,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:52:57,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:52:57,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:57" (1/1) ... [2021-12-21 11:52:57,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:52:57,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:52:57,748 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 11:52:57,799 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 11:52:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:52:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:52:57,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:52:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 11:52:57,877 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:52:57,878 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:53:01,645 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:53:01,649 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:53:01,649 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 11:53:01,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:53:01 BoogieIcfgContainer [2021-12-21 11:53:01,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:53:01,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:53:01,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:53:01,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:53:01,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:52:57" (1/3) ... [2021-12-21 11:53:01,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512f80ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:53:01, skipping insertion in model container [2021-12-21 11:53:01,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:52:57" (2/3) ... [2021-12-21 11:53:01,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512f80ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:53:01, skipping insertion in model container [2021-12-21 11:53:01,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:53:01" (3/3) ... [2021-12-21 11:53:01,657 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i.p+cfa-reducer.c [2021-12-21 11:53:01,666 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:53:01,666 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:53:01,735 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:53:01,740 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 11:53:01,740 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:53:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:53:01,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-21 11:53:01,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:53:01,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-21 11:53:01,757 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:53:01,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:53:01,771 INFO L85 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2021-12-21 11:53:01,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:53:01,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943432061] [2021-12-21 11:53:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:53:01,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:53:01,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:53:01,784 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 11:53:01,785 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 11:53:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:53:02,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:53:02,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:53:08,345 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 11:53:08,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:53:08,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:53:08,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943432061] [2021-12-21 11:53:08,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943432061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:53:08,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:53:08,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:53:08,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006609484] [2021-12-21 11:53:08,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:53:08,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:53:08,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:53:08,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:53:08,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:53:08,377 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:53:09,487 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 11:53:15,632 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 11:53:17,884 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 11:53:17,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:53:17,886 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-21 11:53:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:53:18,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-21 11:53:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:53:18,484 INFO L225 Difference]: With dead ends: 16 [2021-12-21 11:53:18,486 INFO L226 Difference]: Without dead ends: 7 [2021-12-21 11:53:18,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:53:18,492 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:53:18,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-12-21 11:53:18,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-12-21 11:53:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-12-21 11:53:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:53:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-12-21 11:53:18,527 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-12-21 11:53:18,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:53:18,528 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-12-21 11:53:18,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:53:18,528 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-12-21 11:53:18,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 11:53:18,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:53:18,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 11:53:18,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-21 11:53:18,750 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 11:53:18,750 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:53:18,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:53:18,751 INFO L85 PathProgramCache]: Analyzing trace with hash 889537510, now seen corresponding path program 1 times [2021-12-21 11:53:18,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:53:18,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414201748] [2021-12-21 11:53:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:53:18,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:53:18,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:53:18,754 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 11:53:18,755 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 11:53:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:53:20,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 11:53:20,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:53:31,635 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (/ 8.0 5.0)))) (and (= (fp.div roundNearestTiesToEven |c_ULTIMATE.start_main_~main__x~0#1| .cse0) |c_ULTIMATE.start_main_~main__x1~0#1|) (= |c_ULTIMATE.start_main_~main__x~0#1| (fp.div roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven 1.0) .cse0)))) is different from true [2021-12-21 11:53:31,654 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 11:53:31,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:53:38,212 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0))) |c_ULTIMATE.start_main_~main__x1~0#1|)) is different from false [2021-12-21 11:53:45,823 WARN L838 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from false [2021-12-21 11:53:48,119 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2021-12-21 11:53:48,119 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 11:53:48,119 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 11:53:48,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414201748] [2021-12-21 11:53:48,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414201748] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:53:48,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 11:53:48,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-21 11:53:48,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894384026] [2021-12-21 11:53:48,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 11:53:48,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 11:53:48,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 11:53:48,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 11:53:48,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=14, Unknown=4, NotChecked=24, Total=56 [2021-12-21 11:53:48,121 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:53:50,465 WARN L860 $PredicateComparison]: unable to prove that (and (not (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-12-21 11:53:52,641 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (/ 8.0 5.0)))) (and (not (fp.eq (fp.div c_currentRoundingMode |c_ULTIMATE.start_main_~main__x1~0#1| .cse0) |c_ULTIMATE.start_main_~main__x1~0#1|)) (= (fp.div c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 1.0) .cse0) |c_ULTIMATE.start_main_~main__x1~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-12-21 11:54:01,714 WARN L227 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 14 DAG size of output: 12 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-21 11:54:04,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 11:54:04,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:54:04,301 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-12-21 11:54:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 11:54:04,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 11:54:04,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:54:04,302 INFO L225 Difference]: With dead ends: 11 [2021-12-21 11:54:04,302 INFO L226 Difference]: Without dead ends: 8 [2021-12-21 11:54:04,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=21, Invalid=22, Unknown=7, NotChecked=60, Total=110 [2021-12-21 11:54:04,303 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:54:04,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 1 Unknown, 11 Unchecked, 2.6s Time] [2021-12-21 11:54:04,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-21 11:54:04,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-21 11:54:04,305 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 11:54:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-21 11:54:04,306 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-12-21 11:54:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:54:04,306 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-21 11:54:04,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:54:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-21 11:54:04,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 11:54:04,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:54:04,306 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-12-21 11:54:04,340 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 11:54:04,515 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 11:54:04,516 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:54:04,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:54:04,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1805796550, now seen corresponding path program 2 times [2021-12-21 11:54:04,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 11:54:04,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90958725] [2021-12-21 11:54:04,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 11:54:04,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 11:54:04,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 11:54:04,518 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 11:54:04,521 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 11:54:06,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 11:54:06,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 11:54:06,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 11:54:06,749 INFO L286 TraceCheckSpWp]: Computing forward predicates...