./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:33:03,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:33:03,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:33:03,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:33:03,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:33:03,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:33:03,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:33:03,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:33:03,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:33:03,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:33:03,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:33:03,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:33:03,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:33:03,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:33:03,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:33:03,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:33:03,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:33:03,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:33:03,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:33:03,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:33:03,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:33:03,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:33:03,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:33:03,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:33:03,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:33:03,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:33:03,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:33:03,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:33:03,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:33:03,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:33:03,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:33:03,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:33:03,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:33:03,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:33:03,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:33:03,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:33:03,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:33:03,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:33:03,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:33:03,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:33:03,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:33:03,234 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:33:03,265 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:33:03,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:33:03,266 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:33:03,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:33:03,267 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:33:03,267 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:33:03,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:33:03,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:33:03,268 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:33:03,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:33:03,269 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:33:03,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:33:03,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:33:03,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:33:03,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:33:03,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:33:03,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:33:03,271 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:33:03,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:33:03,271 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:33:03,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:33:03,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:33:03,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:33:03,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:33:03,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:33:03,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:33:03,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:33:03,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:33:03,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:33:03,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:33:03,273 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:33:03,273 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:33:03,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:33:03,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:33:03,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d [2021-12-15 23:33:03,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:33:03,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:33:03,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:33:03,527 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:33:03,528 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:33:03,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-15 23:33:03,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68cc43ff4/0d6fb13ca0084edc8d35aa791d5e4065/FLAG33e01ad80 [2021-12-15 23:33:03,969 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:33:03,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-15 23:33:03,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68cc43ff4/0d6fb13ca0084edc8d35aa791d5e4065/FLAG33e01ad80 [2021-12-15 23:33:03,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68cc43ff4/0d6fb13ca0084edc8d35aa791d5e4065 [2021-12-15 23:33:04,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:33:04,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:33:04,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:33:04,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:33:04,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:33:04,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:33:03" (1/1) ... [2021-12-15 23:33:04,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fdb4340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:04, skipping insertion in model container [2021-12-15 23:33:04,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:33:03" (1/1) ... [2021-12-15 23:33:04,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:33:04,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:33:04,172 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-12-15 23:33:04,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:33:04,191 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:33:04,203 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-12-15 23:33:04,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:33:04,218 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:33:04,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:04 WrapperNode [2021-12-15 23:33:04,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:33:04,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:33:04,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:33:04,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:33:04,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:04" (1/1) ... [2021-12-15 23:33:04,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:04" (1/1) ... [2021-12-15 23:33:04,251 INFO L137 Inliner]: procedures = 14, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2021-12-15 23:33:04,252 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:33:04,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:33:04,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:33:04,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:33:04,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:04" (1/1) ... [2021-12-15 23:33:04,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:04" (1/1) ... [2021-12-15 23:33:04,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:04" (1/1) ... [2021-12-15 23:33:04,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:04" (1/1) ... [2021-12-15 23:33:04,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:04" (1/1) ... [2021-12-15 23:33:04,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:04" (1/1) ... [2021-12-15 23:33:04,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:04" (1/1) ... [2021-12-15 23:33:04,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:33:04,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:33:04,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:33:04,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:33:04,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:04" (1/1) ... [2021-12-15 23:33:04,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:33:04,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:33:04,304 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 23:33:04,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 23:33:04,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:33:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:33:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:33:04,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:33:04,369 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:33:04,370 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:33:04,426 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:33:04,431 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:33:04,431 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:33:04,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:33:04 BoogieIcfgContainer [2021-12-15 23:33:04,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:33:04,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:33:04,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:33:04,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:33:04,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:33:03" (1/3) ... [2021-12-15 23:33:04,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3de262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:33:04, skipping insertion in model container [2021-12-15 23:33:04,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:04" (2/3) ... [2021-12-15 23:33:04,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3de262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:33:04, skipping insertion in model container [2021-12-15 23:33:04,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:33:04" (3/3) ... [2021-12-15 23:33:04,445 INFO L111 eAbstractionObserver]: Analyzing ICFG Float_div_bad.i [2021-12-15 23:33:04,448 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:33:04,449 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:33:04,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:33:04,492 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 23:33:04,492 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:33:04,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:33:04,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 23:33:04,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:33:04,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 23:33:04,508 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:33:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:33:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-15 23:33:04,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:33:04,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010909489] [2021-12-15 23:33:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:33:04,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:33:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 23:33:04,597 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 23:33:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 23:33:04,634 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 23:33:04,636 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-15 23:33:04,637 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 23:33:04,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:33:04,645 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-15 23:33:04,648 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 23:33:04,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 11:33:04 BoogieIcfgContainer [2021-12-15 23:33:04,666 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 23:33:04,669 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 23:33:04,669 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 23:33:04,669 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 23:33:04,670 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:33:04" (3/4) ... [2021-12-15 23:33:04,672 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-15 23:33:04,677 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 23:33:04,680 INFO L158 Benchmark]: Toolchain (without parser) took 677.42ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 65.2MB in the beginning and 92.7MB in the end (delta: -27.5MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. [2021-12-15 23:33:04,681 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 94.4MB. Free memory was 51.3MB in the beginning and 51.3MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 23:33:04,682 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.62ms. Allocated memory is still 94.4MB. Free memory was 65.0MB in the beginning and 69.8MB in the end (delta: -4.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 23:33:04,682 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.17ms. Allocated memory is still 94.4MB. Free memory was 69.8MB in the beginning and 68.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 23:33:04,684 INFO L158 Benchmark]: Boogie Preprocessor took 17.16ms. Allocated memory is still 94.4MB. Free memory was 68.4MB in the beginning and 67.4MB in the end (delta: 982.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 23:33:04,687 INFO L158 Benchmark]: RCFGBuilder took 162.41ms. Allocated memory is still 94.4MB. Free memory was 67.4MB in the beginning and 59.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 23:33:04,688 INFO L158 Benchmark]: TraceAbstraction took 232.03ms. Allocated memory is still 94.4MB. Free memory was 58.5MB in the beginning and 46.5MB in the end (delta: 12.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 23:33:04,690 INFO L158 Benchmark]: Witness Printer took 9.08ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 46.5MB in the beginning and 92.7MB in the end (delta: -46.2MB). Peak memory consumption was 5.9MB. Max. memory is 16.1GB. [2021-12-15 23:33:04,696 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 94.4MB. Free memory was 51.3MB in the beginning and 51.3MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 216.62ms. Allocated memory is still 94.4MB. Free memory was 65.0MB in the beginning and 69.8MB in the end (delta: -4.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.17ms. Allocated memory is still 94.4MB. Free memory was 69.8MB in the beginning and 68.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.16ms. Allocated memory is still 94.4MB. Free memory was 68.4MB in the beginning and 67.4MB in the end (delta: 982.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 162.41ms. Allocated memory is still 94.4MB. Free memory was 67.4MB in the beginning and 59.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 232.03ms. Allocated memory is still 94.4MB. Free memory was 58.5MB in the beginning and 46.5MB in the end (delta: 12.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Witness Printer took 9.08ms. Allocated memory was 94.4MB in the beginning and 115.3MB in the end (delta: 21.0MB). Free memory was 46.5MB in the beginning and 92.7MB in the end (delta: -46.2MB). Peak memory consumption was 5.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 29, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L20] float x = 1.0f; [L21] float x1 = x/1.6f; VAL [x=1] [L23] COND FALSE !(x1 != x) VAL [x=1] [L29] CALL __VERIFIER_assert(x == 0) [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L13] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-15 23:33:04,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:33:06,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:33:06,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:33:06,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:33:06,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:33:06,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:33:06,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:33:06,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:33:06,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:33:06,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:33:06,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:33:06,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:33:06,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:33:06,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:33:06,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:33:06,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:33:06,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:33:06,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:33:06,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:33:06,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:33:06,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:33:06,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:33:06,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:33:06,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:33:06,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:33:06,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:33:06,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:33:06,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:33:06,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:33:06,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:33:06,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:33:06,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:33:06,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:33:06,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:33:06,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:33:06,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:33:06,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:33:06,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:33:06,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:33:06,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:33:06,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:33:06,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 23:33:06,778 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:33:06,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:33:06,780 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:33:06,780 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:33:06,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:33:06,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:33:06,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:33:06,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:33:06,782 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:33:06,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:33:06,783 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:33:06,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:33:06,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:33:06,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:33:06,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:33:06,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:33:06,784 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 23:33:06,785 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 23:33:06,785 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 23:33:06,785 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:33:06,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:33:06,785 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:33:06,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:33:06,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:33:06,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:33:06,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:33:06,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:33:06,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:33:06,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:33:06,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:33:06,787 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 23:33:06,787 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 23:33:06,788 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:33:06,788 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:33:06,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:33:06,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:33:06,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 23:33:06,789 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497906435138d6e8ed86f6117a3a5c3feed8c22116354c349b2936471319931d [2021-12-15 23:33:07,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:33:07,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:33:07,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:33:07,111 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:33:07,112 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:33:07,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-15 23:33:07,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e50331ed5/21aa240f5f29433eb06455093a38acdd/FLAG24175be02 [2021-12-15 23:33:07,574 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:33:07,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i [2021-12-15 23:33:07,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e50331ed5/21aa240f5f29433eb06455093a38acdd/FLAG24175be02 [2021-12-15 23:33:07,970 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e50331ed5/21aa240f5f29433eb06455093a38acdd [2021-12-15 23:33:07,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:33:07,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:33:07,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:33:07,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:33:07,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:33:07,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:33:07" (1/1) ... [2021-12-15 23:33:07,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a5c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:07, skipping insertion in model container [2021-12-15 23:33:07,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:33:07" (1/1) ... [2021-12-15 23:33:07,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:33:07,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:33:08,105 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-12-15 23:33:08,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:33:08,123 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:33:08,134 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-esbmc-regression/Float_div_bad.i[807,820] [2021-12-15 23:33:08,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:33:08,148 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:33:08,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:08 WrapperNode [2021-12-15 23:33:08,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:33:08,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:33:08,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:33:08,150 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:33:08,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:08" (1/1) ... [2021-12-15 23:33:08,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:08" (1/1) ... [2021-12-15 23:33:08,183 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2021-12-15 23:33:08,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:33:08,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:33:08,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:33:08,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:33:08,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:08" (1/1) ... [2021-12-15 23:33:08,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:08" (1/1) ... [2021-12-15 23:33:08,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:08" (1/1) ... [2021-12-15 23:33:08,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:08" (1/1) ... [2021-12-15 23:33:08,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:08" (1/1) ... [2021-12-15 23:33:08,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:08" (1/1) ... [2021-12-15 23:33:08,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:08" (1/1) ... [2021-12-15 23:33:08,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:33:08,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:33:08,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:33:08,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:33:08,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:08" (1/1) ... [2021-12-15 23:33:08,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:33:08,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:33:08,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 23:33:08,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 23:33:08,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:33:08,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 23:33:08,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:33:08,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:33:08,364 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:33:08,366 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:33:09,051 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:33:09,055 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:33:09,056 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:33:09,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:33:09 BoogieIcfgContainer [2021-12-15 23:33:09,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:33:09,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:33:09,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:33:09,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:33:09,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:33:07" (1/3) ... [2021-12-15 23:33:09,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@522ced19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:33:09, skipping insertion in model container [2021-12-15 23:33:09,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:33:08" (2/3) ... [2021-12-15 23:33:09,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@522ced19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:33:09, skipping insertion in model container [2021-12-15 23:33:09,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:33:09" (3/3) ... [2021-12-15 23:33:09,064 INFO L111 eAbstractionObserver]: Analyzing ICFG Float_div_bad.i [2021-12-15 23:33:09,068 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:33:09,069 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:33:09,120 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:33:09,126 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 23:33:09,127 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:33:09,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:33:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 23:33:09,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:33:09,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 23:33:09,142 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:33:09,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:33:09,146 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-15 23:33:09,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 23:33:09,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112672956] [2021-12-15 23:33:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:33:09,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 23:33:09,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 23:33:09,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 23:33:09,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 23:33:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:33:09,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 23:33:09,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:33:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:33:10,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:33:10,980 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 23:33:10,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112672956] [2021-12-15 23:33:10,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112672956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:33:10,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:33:10,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:33:10,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139999204] [2021-12-15 23:33:10,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:33:10,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:33:10,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 23:33:11,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:33:11,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:33:11,010 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:33:12,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:33:12,146 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-12-15 23:33:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:33:12,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 23:33:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:33:12,156 INFO L225 Difference]: With dead ends: 20 [2021-12-15 23:33:12,156 INFO L226 Difference]: Without dead ends: 8 [2021-12-15 23:33:12,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:33:12,162 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:33:12,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 23:33:12,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-15 23:33:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-15 23:33:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:33:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-15 23:33:12,183 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-12-15 23:33:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:33:12,183 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-15 23:33:12,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:33:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-15 23:33:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 23:33:12,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:33:12,184 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:33:12,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-15 23:33:12,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 23:33:12,388 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:33:12,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:33:12,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-12-15 23:33:12,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 23:33:12,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032021146] [2021-12-15 23:33:12,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:33:12,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 23:33:12,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 23:33:12,391 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 23:33:12,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-15 23:33:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:33:12,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 23:33:12,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:33:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:33:16,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:33:28,597 WARN L860 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (let ((.cse0 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse1))) (fp.eq (fp.div c_currentRoundingMode .cse0 .cse1) .cse0)))) is different from true [2021-12-15 23:33:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:33:28,598 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 23:33:28,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032021146] [2021-12-15 23:33:28,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032021146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 23:33:28,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:33:28,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-15 23:33:28,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758448769] [2021-12-15 23:33:28,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 23:33:28,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 23:33:28,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 23:33:28,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 23:33:28,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=28, Unknown=1, NotChecked=10, Total=56 [2021-12-15 23:33:28,601 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:33:30,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 23:33:42,247 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-15 23:33:45,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-15 23:33:45,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:33:45,060 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-12-15 23:33:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 23:33:45,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-15 23:33:45,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:33:45,084 INFO L225 Difference]: With dead ends: 15 [2021-12-15 23:33:45,084 INFO L226 Difference]: Without dead ends: 11 [2021-12-15 23:33:45,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=43, Invalid=70, Unknown=1, NotChecked=18, Total=132 [2021-12-15 23:33:45,086 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:33:45,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 13 Invalid, 3 Unknown, 7 Unchecked, 8.3s Time] [2021-12-15 23:33:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-12-15 23:33:45,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-12-15 23:33:45,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:33:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-12-15 23:33:45,090 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2021-12-15 23:33:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:33:45,090 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-12-15 23:33:45,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:33:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-12-15 23:33:45,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 23:33:45,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:33:45,091 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-12-15 23:33:45,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-15 23:33:45,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 23:33:45,300 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:33:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:33:45,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2021-12-15 23:33:45,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 23:33:45,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276606423] [2021-12-15 23:33:45,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 23:33:45,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 23:33:45,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 23:33:45,302 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 23:33:45,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-15 23:33:45,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 23:33:45,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 23:33:45,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 23:33:45,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:34:01,582 WARN L227 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-15 23:34:07,837 WARN L860 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_main_~x1~0#1| (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 8.0 5.0)))) (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) .cse0) .cse0) .cse0) .cse0)))) is different from true [2021-12-15 23:34:20,767 WARN L227 SmtUtils]: Spent 6.87s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-15 23:34:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-15 23:34:20,805 INFO L328 TraceCheckSpWp]: Computing backward predicates...