./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/double_req_bl_1131b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 096883e9 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/float-newlib/double_req_bl_1131b.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 4975ced40ee4a8ea85abb8c123fa258e6c012e9d ........................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/float-newlib/double_req_bl_1131b.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 4975ced40ee4a8ea85abb8c123fa258e6c012e9d .................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-096883e [2020-12-01 23:20:51,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 23:20:51,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 23:20:51,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 23:20:51,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 23:20:51,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 23:20:51,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 23:20:51,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 23:20:51,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 23:20:51,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 23:20:51,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 23:20:51,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 23:20:51,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 23:20:51,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 23:20:51,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 23:20:51,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 23:20:51,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 23:20:51,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 23:20:51,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 23:20:51,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 23:20:51,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 23:20:51,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 23:20:51,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 23:20:51,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 23:20:52,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 23:20:52,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 23:20:52,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 23:20:52,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 23:20:52,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 23:20:52,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 23:20:52,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 23:20:52,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 23:20:52,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 23:20:52,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 23:20:52,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 23:20:52,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 23:20:52,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 23:20:52,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 23:20:52,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 23:20:52,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 23:20:52,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 23:20:52,025 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 23:20:52,090 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 23:20:52,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 23:20:52,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 23:20:52,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 23:20:52,094 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 23:20:52,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 23:20:52,095 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 23:20:52,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 23:20:52,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 23:20:52,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 23:20:52,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 23:20:52,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 23:20:52,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 23:20:52,098 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 23:20:52,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 23:20:52,098 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 23:20:52,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 23:20:52,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 23:20:52,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 23:20:52,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 23:20:52,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 23:20:52,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 23:20:52,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 23:20:52,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 23:20:52,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 23:20:52,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 23:20:52,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 23:20:52,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 23:20:52,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 23:20:52,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4975ced40ee4a8ea85abb8c123fa258e6c012e9d [2020-12-01 23:20:52,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 23:20:52,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 23:20:52,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 23:20:52,578 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 23:20:52,580 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 23:20:52,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1131b.c [2020-12-01 23:20:52,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf4b9e0b/f4b6ee46556b49c28bf6b46040792102/FLAG4f6353e0a [2020-12-01 23:20:53,333 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 23:20:53,334 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1131b.c [2020-12-01 23:20:53,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf4b9e0b/f4b6ee46556b49c28bf6b46040792102/FLAG4f6353e0a [2020-12-01 23:20:53,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf4b9e0b/f4b6ee46556b49c28bf6b46040792102 [2020-12-01 23:20:53,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 23:20:53,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 23:20:53,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 23:20:53,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 23:20:53,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 23:20:53,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 11:20:53" (1/1) ... [2020-12-01 23:20:53,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f60ca0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:53, skipping insertion in model container [2020-12-01 23:20:53,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 11:20:53" (1/1) ... [2020-12-01 23:20:53,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 23:20:53,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 23:20:54,159 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1131b.c[4119,4132] [2020-12-01 23:20:54,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 23:20:54,177 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 23:20:54,227 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1131b.c[4119,4132] [2020-12-01 23:20:54,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 23:20:54,256 INFO L208 MainTranslator]: Completed translation [2020-12-01 23:20:54,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:54 WrapperNode [2020-12-01 23:20:54,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 23:20:54,261 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 23:20:54,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 23:20:54,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 23:20:54,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:54" (1/1) ... [2020-12-01 23:20:54,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:54" (1/1) ... [2020-12-01 23:20:54,375 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 23:20:54,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 23:20:54,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 23:20:54,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 23:20:54,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:54" (1/1) ... [2020-12-01 23:20:54,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:54" (1/1) ... [2020-12-01 23:20:54,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:54" (1/1) ... [2020-12-01 23:20:54,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:54" (1/1) ... [2020-12-01 23:20:54,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:54" (1/1) ... [2020-12-01 23:20:54,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:54" (1/1) ... [2020-12-01 23:20:54,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:54" (1/1) ... [2020-12-01 23:20:54,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 23:20:54,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 23:20:54,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 23:20:54,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 23:20:54,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 23:20:54,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 23:20:54,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 23:20:54,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 23:20:54,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-01 23:20:54,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-01 23:20:54,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 23:20:54,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 23:20:54,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 23:20:54,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-12-01 23:20:54,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 23:20:55,323 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 23:20:55,323 INFO L298 CfgBuilder]: Removed 24 assume(true) statements. [2020-12-01 23:20:55,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:20:55 BoogieIcfgContainer [2020-12-01 23:20:55,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 23:20:55,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 23:20:55,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 23:20:55,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 23:20:55,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 11:20:53" (1/3) ... [2020-12-01 23:20:55,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394b9a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 11:20:55, skipping insertion in model container [2020-12-01 23:20:55,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:20:54" (2/3) ... [2020-12-01 23:20:55,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394b9a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 11:20:55, skipping insertion in model container [2020-12-01 23:20:55,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:20:55" (3/3) ... [2020-12-01 23:20:55,337 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1131b.c [2020-12-01 23:20:55,353 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 23:20:55,358 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 23:20:55,369 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 23:20:55,396 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 23:20:55,397 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 23:20:55,397 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 23:20:55,397 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 23:20:55,397 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 23:20:55,397 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 23:20:55,397 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 23:20:55,398 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 23:20:55,413 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-12-01 23:20:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-01 23:20:55,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:20:55,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:20:55,421 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:20:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:20:55,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2036387893, now seen corresponding path program 1 times [2020-12-01 23:20:55,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 23:20:55,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598702036] [2020-12-01 23:20:55,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 23:20:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 23:20:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 23:20:55,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598702036] [2020-12-01 23:20:55,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 23:20:55,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 23:20:55,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612644146] [2020-12-01 23:20:55,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 23:20:55,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 23:20:55,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 23:20:55,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 23:20:55,642 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 2 states. [2020-12-01 23:20:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 23:20:55,670 INFO L93 Difference]: Finished difference Result 118 states and 206 transitions. [2020-12-01 23:20:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 23:20:55,672 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-12-01 23:20:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 23:20:55,684 INFO L225 Difference]: With dead ends: 118 [2020-12-01 23:20:55,684 INFO L226 Difference]: Without dead ends: 56 [2020-12-01 23:20:55,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 23:20:55,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-01 23:20:55,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-01 23:20:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-01 23:20:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 82 transitions. [2020-12-01 23:20:55,733 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 82 transitions. Word has length 13 [2020-12-01 23:20:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 23:20:55,734 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 82 transitions. [2020-12-01 23:20:55,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 23:20:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 82 transitions. [2020-12-01 23:20:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 23:20:55,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:20:55,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:20:55,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 23:20:55,736 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:20:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:20:55,737 INFO L82 PathProgramCache]: Analyzing trace with hash -794890891, now seen corresponding path program 1 times [2020-12-01 23:20:55,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 23:20:55,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830988292] [2020-12-01 23:20:55,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 23:20:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 23:20:55,884 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 23:20:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 23:20:56,031 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 23:20:56,079 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 23:20:56,079 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 23:20:56,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 23:20:56,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 11:20:56 BoogieIcfgContainer [2020-12-01 23:20:56,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 23:20:56,143 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 23:20:56,143 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 23:20:56,143 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 23:20:56,144 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:20:55" (3/4) ... [2020-12-01 23:20:56,148 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-01 23:20:56,148 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 23:20:56,151 INFO L168 Benchmark]: Toolchain (without parser) took 2455.48 ms. Allocated memory was 44.0 MB in the beginning and 67.1 MB in the end (delta: 23.1 MB). Free memory was 19.7 MB in the beginning and 41.0 MB in the end (delta: -21.3 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2020-12-01 23:20:56,152 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 44.0 MB. Free memory was 29.3 MB in the beginning and 29.2 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 23:20:56,153 INFO L168 Benchmark]: CACSL2BoogieTranslator took 556.29 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.5 MB in the beginning and 25.8 MB in the end (delta: -6.3 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-12-01 23:20:56,154 INFO L168 Benchmark]: Boogie Procedure Inliner took 114.06 ms. Allocated memory is still 54.5 MB. Free memory was 25.8 MB in the beginning and 36.8 MB in the end (delta: -11.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-12-01 23:20:56,155 INFO L168 Benchmark]: Boogie Preprocessor took 90.22 ms. Allocated memory is still 54.5 MB. Free memory was 36.8 MB in the beginning and 34.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 23:20:56,156 INFO L168 Benchmark]: RCFGBuilder took 856.33 ms. Allocated memory is still 54.5 MB. Free memory was 34.7 MB in the beginning and 27.8 MB in the end (delta: 6.8 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. [2020-12-01 23:20:56,158 INFO L168 Benchmark]: TraceAbstraction took 812.74 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 27.6 MB in the beginning and 41.3 MB in the end (delta: -13.8 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. [2020-12-01 23:20:56,159 INFO L168 Benchmark]: Witness Printer took 5.72 ms. Allocated memory is still 67.1 MB. Free memory was 41.3 MB in the beginning and 41.0 MB in the end (delta: 396.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 23:20:56,164 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 44.0 MB. Free memory was 29.3 MB in the beginning and 29.2 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 556.29 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.5 MB in the beginning and 25.8 MB in the end (delta: -6.3 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 114.06 ms. Allocated memory is still 54.5 MB. Free memory was 25.8 MB in the beginning and 36.8 MB in the end (delta: -11.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 90.22 ms. Allocated memory is still 54.5 MB. Free memory was 36.8 MB in the beginning and 34.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 856.33 ms. Allocated memory is still 54.5 MB. Free memory was 34.7 MB in the beginning and 27.8 MB in the end (delta: 6.8 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 812.74 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 27.6 MB in the beginning and 41.3 MB in the end (delta: -13.8 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. * Witness Printer took 5.72 ms. Allocated memory is still 67.1 MB. Free memory was 41.3 MB in the beginning and 41.0 MB in the end (delta: 396.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 188]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 43, overapproximation of someUnaryDOUBLEoperation at line 19, overapproximation of someBinaryArithmeticDOUBLEoperation at line 44, overapproximation of bitwiseAnd at line 38, overapproximation of someBinaryDOUBLEComparisonOperation at line 187, overapproximation of bitwiseXor at line 39. Possible FailurePath: [L17-L20] static const double one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; VAL [one_fmod=1, Zero_fmod={9:0}] [L179] double y = -1.0 / 0.0; [L180] double x = __VERIFIER_nondet_double(); [L163] __int32_t hx; VAL [one_fmod=1, Zero_fmod={9:0}] [L165] ieee_double_shape_type gh_u; [L166] gh_u.value = (x) [L167] EXPR gh_u.parts.msw [L167] (hx) = gh_u.parts.msw [L169] return (int)((__uint32_t)((hx & 0x7fffffff) - 0x7ff00000) >> 31); VAL [one_fmod=1, Zero_fmod={9:0}] [L182] COND TRUE isfinite_double(x) [L23] __int32_t n, hx, hy, hz, ix, iy, sx, i; [L24] __uint32_t lx, ly, lz; VAL [one_fmod=1, Zero_fmod={9:0}] [L27] ieee_double_shape_type ew_u; [L28] ew_u.value = (x) [L29] EXPR ew_u.parts.msw [L29] (hx) = ew_u.parts.msw [L30] EXPR ew_u.parts.lsw [L30] (lx) = ew_u.parts.lsw [L33] ieee_double_shape_type ew_u; [L34] ew_u.value = (y) [L35] EXPR ew_u.parts.msw [L35] (hy) = ew_u.parts.msw [L36] EXPR ew_u.parts.lsw [L36] (ly) = ew_u.parts.lsw [L38] sx = hx & 0x80000000 [L39] hx ^= sx [L40] hy &= 0x7fffffff VAL [one_fmod=1, Zero_fmod={9:0}] [L42-L43] COND TRUE (hy | ly) == 0 || (hx >= 0x7ff00000) || ((hy | ((ly | -ly) >> 31)) > 0x7ff00000) [L44] return (x * y) / (x * y); VAL [one_fmod=1, Zero_fmod={9:0}] [L184] double res = fmod_double(x, y); [L187] COND TRUE res != x VAL [one_fmod=1, Zero_fmod={9:0}] [L188] reach_error() VAL [one_fmod=1, Zero_fmod={9:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 144 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-096883e [2020-12-01 23:20:58,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 23:20:58,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 23:20:58,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 23:20:58,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 23:20:58,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 23:20:58,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 23:20:58,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 23:20:58,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 23:20:58,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 23:20:58,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 23:20:58,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 23:20:58,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 23:20:58,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 23:20:58,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 23:20:58,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 23:20:58,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 23:20:58,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 23:20:58,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 23:20:58,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 23:20:58,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 23:20:58,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 23:20:58,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 23:20:58,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 23:20:58,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 23:20:58,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 23:20:58,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 23:20:58,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 23:20:58,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 23:20:58,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 23:20:58,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 23:20:58,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 23:20:58,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 23:20:58,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 23:20:58,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 23:20:58,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 23:20:58,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 23:20:58,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 23:20:58,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 23:20:58,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 23:20:58,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 23:20:58,865 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-01 23:20:58,924 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 23:20:58,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 23:20:58,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 23:20:58,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 23:20:58,929 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 23:20:58,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 23:20:58,930 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 23:20:58,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 23:20:58,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 23:20:58,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 23:20:58,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 23:20:58,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 23:20:58,931 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-01 23:20:58,932 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-01 23:20:58,932 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 23:20:58,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 23:20:58,934 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 23:20:58,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 23:20:58,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 23:20:58,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 23:20:58,935 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 23:20:58,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 23:20:58,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 23:20:58,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 23:20:58,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 23:20:58,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 23:20:58,937 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-01 23:20:58,937 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-01 23:20:58,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 23:20:58,938 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 23:20:58,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-01 23:20:58,938 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4975ced40ee4a8ea85abb8c123fa258e6c012e9d [2020-12-01 23:20:59,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 23:20:59,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 23:20:59,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 23:20:59,498 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 23:20:59,499 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 23:20:59,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1131b.c [2020-12-01 23:20:59,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84e95d60c/8bf7c5f4296f463197386230cc8dcbac/FLAG24313cdf9 [2020-12-01 23:21:00,248 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 23:21:00,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1131b.c [2020-12-01 23:21:00,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84e95d60c/8bf7c5f4296f463197386230cc8dcbac/FLAG24313cdf9 [2020-12-01 23:21:00,622 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84e95d60c/8bf7c5f4296f463197386230cc8dcbac [2020-12-01 23:21:00,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 23:21:00,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 23:21:00,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 23:21:00,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 23:21:00,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 23:21:00,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 11:21:00" (1/1) ... [2020-12-01 23:21:00,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3820bab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:00, skipping insertion in model container [2020-12-01 23:21:00,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 11:21:00" (1/1) ... [2020-12-01 23:21:00,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 23:21:00,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 23:21:01,041 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1131b.c[4119,4132] [2020-12-01 23:21:01,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 23:21:01,060 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 23:21:01,137 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1131b.c[4119,4132] [2020-12-01 23:21:01,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 23:21:01,166 INFO L208 MainTranslator]: Completed translation [2020-12-01 23:21:01,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:01 WrapperNode [2020-12-01 23:21:01,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 23:21:01,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 23:21:01,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 23:21:01,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 23:21:01,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:01" (1/1) ... [2020-12-01 23:21:01,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:01" (1/1) ... [2020-12-01 23:21:01,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 23:21:01,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 23:21:01,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 23:21:01,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 23:21:01,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:01" (1/1) ... [2020-12-01 23:21:01,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:01" (1/1) ... [2020-12-01 23:21:01,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:01" (1/1) ... [2020-12-01 23:21:01,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:01" (1/1) ... [2020-12-01 23:21:01,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:01" (1/1) ... [2020-12-01 23:21:01,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:01" (1/1) ... [2020-12-01 23:21:01,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:01" (1/1) ... [2020-12-01 23:21:01,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 23:21:01,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 23:21:01,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 23:21:01,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 23:21:01,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 23:21:01,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-12-01 23:21:01,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-12-01 23:21:01,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-01 23:21:01,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 23:21:01,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE8 [2020-12-01 23:21:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-01 23:21:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 23:21:01,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 23:21:01,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-01 23:21:01,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 23:21:07,305 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 23:21:07,306 INFO L298 CfgBuilder]: Removed 24 assume(true) statements. [2020-12-01 23:21:07,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:21:07 BoogieIcfgContainer [2020-12-01 23:21:07,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 23:21:07,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 23:21:07,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 23:21:07,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 23:21:07,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 11:21:00" (1/3) ... [2020-12-01 23:21:07,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9f85a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 11:21:07, skipping insertion in model container [2020-12-01 23:21:07,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:21:01" (2/3) ... [2020-12-01 23:21:07,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9f85a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 11:21:07, skipping insertion in model container [2020-12-01 23:21:07,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:21:07" (3/3) ... [2020-12-01 23:21:07,325 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1131b.c [2020-12-01 23:21:07,347 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 23:21:07,353 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 23:21:07,377 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 23:21:07,421 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 23:21:07,422 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 23:21:07,422 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 23:21:07,423 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 23:21:07,423 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 23:21:07,423 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 23:21:07,423 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 23:21:07,424 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 23:21:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-12-01 23:21:07,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-01 23:21:07,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:21:07,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:21:07,476 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:21:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:21:07,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2036387893, now seen corresponding path program 1 times [2020-12-01 23:21:07,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-01 23:21:07,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123057614] [2020-12-01 23:21:07,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-01 23:21:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 23:21:08,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-01 23:21:08,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 23:21:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 23:21:08,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-01 23:21:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 23:21:08,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123057614] [2020-12-01 23:21:08,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-01 23:21:08,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-01 23:21:08,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000812685] [2020-12-01 23:21:08,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 23:21:08,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-01 23:21:08,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 23:21:08,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 23:21:08,792 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 2 states. [2020-12-01 23:21:08,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 23:21:08,840 INFO L93 Difference]: Finished difference Result 118 states and 206 transitions. [2020-12-01 23:21:08,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 23:21:08,843 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-12-01 23:21:08,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 23:21:08,854 INFO L225 Difference]: With dead ends: 118 [2020-12-01 23:21:08,854 INFO L226 Difference]: Without dead ends: 56 [2020-12-01 23:21:08,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 23:21:08,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-01 23:21:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-01 23:21:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-01 23:21:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 82 transitions. [2020-12-01 23:21:08,895 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 82 transitions. Word has length 13 [2020-12-01 23:21:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 23:21:08,895 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 82 transitions. [2020-12-01 23:21:08,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 23:21:08,896 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 82 transitions. [2020-12-01 23:21:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 23:21:08,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 23:21:08,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 23:21:09,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-01 23:21:09,111 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 23:21:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 23:21:09,113 INFO L82 PathProgramCache]: Analyzing trace with hash -794890891, now seen corresponding path program 1 times [2020-12-01 23:21:09,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-01 23:21:09,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610784134] [2020-12-01 23:21:09,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-01 23:21:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 23:21:10,573 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 23:21:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 23:21:11,923 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 23:21:12,093 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-01 23:21:12,093 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 23:21:12,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-01 23:21:12,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 11:21:12 BoogieIcfgContainer [2020-12-01 23:21:12,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 23:21:12,339 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 23:21:12,339 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 23:21:12,339 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 23:21:12,340 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:21:07" (3/4) ... [2020-12-01 23:21:12,343 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 23:21:12,405 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-01 23:21:12,405 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 23:21:12,408 INFO L168 Benchmark]: Toolchain (without parser) took 11764.84 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.6 MB in the beginning and 21.3 MB in the end (delta: -637.4 kB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:12,409 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 35.7 MB. Free memory was 21.9 MB in the beginning and 21.9 MB in the end (delta: 22.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 23:21:12,410 INFO L168 Benchmark]: CACSL2BoogieTranslator took 519.53 ms. Allocated memory is still 44.0 MB. Free memory was 20.5 MB in the beginning and 25.0 MB in the end (delta: -4.5 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:12,411 INFO L168 Benchmark]: Boogie Procedure Inliner took 102.35 ms. Allocated memory is still 44.0 MB. Free memory was 25.0 MB in the beginning and 22.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:12,412 INFO L168 Benchmark]: Boogie Preprocessor took 104.43 ms. Allocated memory is still 44.0 MB. Free memory was 22.7 MB in the beginning and 27.7 MB in the end (delta: -5.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:12,413 INFO L168 Benchmark]: RCFGBuilder took 5932.50 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 27.7 MB in the beginning and 27.5 MB in the end (delta: 140.4 kB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:12,414 INFO L168 Benchmark]: TraceAbstraction took 5024.62 ms. Allocated memory is still 54.5 MB. Free memory was 27.0 MB in the beginning and 24.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:12,415 INFO L168 Benchmark]: Witness Printer took 66.38 ms. Allocated memory is still 54.5 MB. Free memory was 24.0 MB in the beginning and 21.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 23:21:12,419 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 35.7 MB. Free memory was 21.9 MB in the beginning and 21.9 MB in the end (delta: 22.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 519.53 ms. Allocated memory is still 44.0 MB. Free memory was 20.5 MB in the beginning and 25.0 MB in the end (delta: -4.5 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 102.35 ms. Allocated memory is still 44.0 MB. Free memory was 25.0 MB in the beginning and 22.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 104.43 ms. Allocated memory is still 44.0 MB. Free memory was 22.7 MB in the beginning and 27.7 MB in the end (delta: -5.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 5932.50 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 27.7 MB in the beginning and 27.5 MB in the end (delta: 140.4 kB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5024.62 ms. Allocated memory is still 54.5 MB. Free memory was 27.0 MB in the beginning and 24.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Witness Printer took 66.38 ms. Allocated memory is still 54.5 MB. Free memory was 24.0 MB in the beginning and 21.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 188]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17-L20] static const double one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; VAL [one_fmod=1.0, Zero_fmod={2:0}] [L179] double y = -1.0 / 0.0; [L180] double x = __VERIFIER_nondet_double(); [L163] __int32_t hx; VAL [one_fmod=1.0, Zero_fmod={2:0}] [L165] ieee_double_shape_type gh_u; [L166] gh_u.value = (x) [L167] EXPR gh_u.parts.msw [L167] (hx) = gh_u.parts.msw [L169] return (int)((__uint32_t)((hx & 0x7fffffff) - 0x7ff00000) >> 31); VAL [one_fmod=1.0, Zero_fmod={2:0}] [L182] COND TRUE isfinite_double(x) [L23] __int32_t n, hx, hy, hz, ix, iy, sx, i; [L24] __uint32_t lx, ly, lz; VAL [one_fmod=1.0, Zero_fmod={2:0}] [L27] ieee_double_shape_type ew_u; [L28] ew_u.value = (x) [L29] EXPR ew_u.parts.msw [L29] (hx) = ew_u.parts.msw [L30] EXPR ew_u.parts.lsw [L30] (lx) = ew_u.parts.lsw [L33] ieee_double_shape_type ew_u; [L34] ew_u.value = (y) [L35] EXPR ew_u.parts.msw [L35] (hy) = ew_u.parts.msw [L36] EXPR ew_u.parts.lsw [L36] (ly) = ew_u.parts.lsw [L38] sx = hx & 0x80000000 [L39] hx ^= sx [L40] hy &= 0x7fffffff VAL [one_fmod=1.0, Zero_fmod={2:0}] [L42-L43] COND TRUE (hy | ly) == 0 || (hx >= 0x7ff00000) || ((hy | ((ly | -ly) >> 31)) > 0x7ff00000) [L44] return (x * y) / (x * y); VAL [one_fmod=1.0, Zero_fmod={2:0}] [L184] double res = fmod_double(x, y); [L187] COND TRUE res != x VAL [one_fmod=1.0, Zero_fmod={2:0}] [L188] reach_error() VAL [one_fmod=1.0, Zero_fmod={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 288 SizeOfPredicates, 0 NumberOfNonLiveVariables, 55 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 proved your program to be incorrect! Received shutdown request...