./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cbmc-regression/float20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cbmc-regression/float20.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dcedd10b8fa79fdd7f584d24ebbda0efe903404a ................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cbmc-regression/float20.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dcedd10b8fa79fdd7f584d24ebbda0efe903404a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 16:50:18,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:50:18,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:50:18,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:50:18,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:50:18,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:50:18,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:50:18,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:50:18,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:50:18,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:50:18,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:50:18,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:50:18,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:50:18,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:50:18,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:50:18,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:50:18,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:50:18,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:50:18,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:50:18,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:50:18,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:50:18,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:50:18,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:50:18,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:50:18,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:50:18,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:50:18,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:50:18,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:50:18,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:50:18,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:50:18,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:50:18,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:50:18,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:50:18,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:50:18,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:50:18,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:50:18,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:50:18,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:50:18,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:50:18,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:50:18,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:50:18,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 16:50:18,265 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:50:18,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:50:18,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:50:18,266 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:50:18,266 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:50:18,266 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:50:18,266 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 16:50:18,267 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:50:18,267 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:50:18,267 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 16:50:18,267 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 16:50:18,267 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:50:18,267 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 16:50:18,267 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 16:50:18,268 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 16:50:18,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:50:18,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:50:18,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 16:50:18,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:50:18,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:50:18,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 16:50:18,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:50:18,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 16:50:18,269 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:50:18,269 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:50:18,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 16:50:18,269 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:50:18,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 16:50:18,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:50:18,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:50:18,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:50:18,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:50:18,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:50:18,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 16:50:18,270 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 16:50:18,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 16:50:18,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 16:50:18,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:50:18,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:50:18,271 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dcedd10b8fa79fdd7f584d24ebbda0efe903404a [2020-12-09 16:50:18,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:50:18,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:50:18,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:50:18,481 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:50:18,482 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:50:18,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/../../sv-benchmarks/c/floats-cbmc-regression/float20.i [2020-12-09 16:50:18,523 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/data/ae0a5654b/c37d3c8b5fb44b68b5249e4ab149c02d/FLAG30a8e3e1a [2020-12-09 16:50:18,885 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:50:18,886 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/sv-benchmarks/c/floats-cbmc-regression/float20.i [2020-12-09 16:50:18,890 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/data/ae0a5654b/c37d3c8b5fb44b68b5249e4ab149c02d/FLAG30a8e3e1a [2020-12-09 16:50:18,899 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/data/ae0a5654b/c37d3c8b5fb44b68b5249e4ab149c02d [2020-12-09 16:50:18,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:50:18,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:50:18,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:50:18,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:50:18,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:50:18,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:50:18" (1/1) ... [2020-12-09 16:50:18,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e485d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:18, skipping insertion in model container [2020-12-09 16:50:18,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:50:18" (1/1) ... [2020-12-09 16:50:18,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:50:18,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:50:19,046 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/sv-benchmarks/c/floats-cbmc-regression/float20.i[1032,1045] [2020-12-09 16:50:19,056 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/sv-benchmarks/c/floats-cbmc-regression/float20.i[1306,1319] [2020-12-09 16:50:19,062 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/sv-benchmarks/c/floats-cbmc-regression/float20.i[1464,1477] [2020-12-09 16:50:19,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:50:19,073 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:50:19,087 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/sv-benchmarks/c/floats-cbmc-regression/float20.i[1032,1045] [2020-12-09 16:50:19,091 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/sv-benchmarks/c/floats-cbmc-regression/float20.i[1306,1319] [2020-12-09 16:50:19,094 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/sv-benchmarks/c/floats-cbmc-regression/float20.i[1464,1477] [2020-12-09 16:50:19,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:50:19,109 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:50:19,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:19 WrapperNode [2020-12-09 16:50:19,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:50:19,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:50:19,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:50:19,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:50:19,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:19" (1/1) ... [2020-12-09 16:50:19,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:19" (1/1) ... [2020-12-09 16:50:19,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:50:19,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:50:19,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:50:19,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:50:19,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:19" (1/1) ... [2020-12-09 16:50:19,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:19" (1/1) ... [2020-12-09 16:50:19,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:19" (1/1) ... [2020-12-09 16:50:19,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:19" (1/1) ... [2020-12-09 16:50:19,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:19" (1/1) ... [2020-12-09 16:50:19,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:19" (1/1) ... [2020-12-09 16:50:19,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:19" (1/1) ... [2020-12-09 16:50:19,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:50:19,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:50:19,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:50:19,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:50:19,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/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 [2020-12-09 16:50:19,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 16:50:19,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:50:19,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:50:19,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:50:19,405 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:50:19,405 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 16:50:19,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:50:19 BoogieIcfgContainer [2020-12-09 16:50:19,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:50:19,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:50:19,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:50:19,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:50:19,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:50:18" (1/3) ... [2020-12-09 16:50:19,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5780a1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:50:19, skipping insertion in model container [2020-12-09 16:50:19,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:19" (2/3) ... [2020-12-09 16:50:19,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5780a1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:50:19, skipping insertion in model container [2020-12-09 16:50:19,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:50:19" (3/3) ... [2020-12-09 16:50:19,413 INFO L111 eAbstractionObserver]: Analyzing ICFG float20.i [2020-12-09 16:50:19,423 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:50:19,426 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 16:50:19,437 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 16:50:19,458 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:50:19,458 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 16:50:19,458 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:50:19,459 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:50:19,459 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:50:19,459 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:50:19,459 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:50:19,459 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:50:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-09 16:50:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 16:50:19,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:50:19,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 16:50:19,474 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:50:19,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:50:19,478 INFO L82 PathProgramCache]: Analyzing trace with hash 95524, now seen corresponding path program 1 times [2020-12-09 16:50:19,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:50:19,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188648750] [2020-12-09 16:50:19,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:50:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 16:50:19,553 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 16:50:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 16:50:19,563 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 16:50:19,577 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 16:50:19,577 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 16:50:19,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 16:50:19,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:50:19 BoogieIcfgContainer [2020-12-09 16:50:19,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:50:19,591 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:50:19,591 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:50:19,591 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:50:19,591 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:50:19" (3/4) ... [2020-12-09 16:50:19,593 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 16:50:19,594 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:50:19,595 INFO L168 Benchmark]: Toolchain (without parser) took 691.64 ms. Allocated memory is still 98.6 MB. Free memory was 75.3 MB in the beginning and 51.6 MB in the end (delta: 23.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.1 GB. [2020-12-09 16:50:19,596 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 67.1 MB. Free memory is still 42.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:50:19,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.09 ms. Allocated memory is still 98.6 MB. Free memory was 75.3 MB in the beginning and 63.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 16:50:19,597 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.40 ms. Allocated memory is still 98.6 MB. Free memory was 63.3 MB in the beginning and 61.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:50:19,597 INFO L168 Benchmark]: Boogie Preprocessor took 17.92 ms. Allocated memory is still 98.6 MB. Free memory was 61.8 MB in the beginning and 60.8 MB in the end (delta: 964.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:50:19,598 INFO L168 Benchmark]: RCFGBuilder took 253.00 ms. Allocated memory is still 98.6 MB. Free memory was 60.8 MB in the beginning and 64.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 16:50:19,599 INFO L168 Benchmark]: TraceAbstraction took 181.83 ms. Allocated memory is still 98.6 MB. Free memory was 63.4 MB in the beginning and 51.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 16:50:19,599 INFO L168 Benchmark]: Witness Printer took 3.18 ms. Allocated memory is still 98.6 MB. Free memory is still 51.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:50:19,602 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 67.1 MB. Free memory is still 42.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 206.09 ms. Allocated memory is still 98.6 MB. Free memory was 75.3 MB in the beginning and 63.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.40 ms. Allocated memory is still 98.6 MB. Free memory was 63.3 MB in the beginning and 61.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.92 ms. Allocated memory is still 98.6 MB. Free memory was 61.8 MB in the beginning and 60.8 MB in the end (delta: 964.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 253.00 ms. Allocated memory is still 98.6 MB. Free memory was 60.8 MB in the beginning and 64.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 181.83 ms. Allocated memory is still 98.6 MB. Free memory was 63.4 MB in the beginning and 51.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Witness Printer took 3.18 ms. Allocated memory is still 98.6 MB. Free memory is still 51.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: 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 21, overapproximation of someBinaryArithmeticDOUBLEoperation at line 18, overapproximation of someBinaryArithmeticFLOAToperation at line 19. Possible FailurePath: [L48] float f=__VERIFIER_nondet_float(); [L17] COND FALSE !(!(min == 0x1.fffffep-105f)) [L18] float modifier = (0x1.0p-23 * (1<<1)); [L19] float ulpdiff = min * modifier; [L21] COND TRUE !(ulpdiff == 0x1p-126f) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 16:50:21,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:50:21,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:50:21,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:50:21,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:50:21,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:50:21,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:50:21,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:50:21,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:50:21,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:50:21,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:50:21,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:50:21,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:50:21,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:50:21,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:50:21,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:50:21,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:50:21,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:50:21,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:50:21,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:50:21,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:50:21,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:50:21,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:50:21,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:50:21,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:50:21,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:50:21,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:50:21,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:50:21,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:50:21,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:50:21,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:50:21,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:50:21,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:50:21,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:50:21,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:50:21,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:50:21,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:50:21,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:50:21,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:50:21,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:50:21,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:50:21,150 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 16:50:21,172 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:50:21,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:50:21,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:50:21,173 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:50:21,173 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:50:21,173 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:50:21,173 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:50:21,173 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:50:21,174 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:50:21,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:50:21,174 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:50:21,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:50:21,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:50:21,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 16:50:21,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:50:21,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 16:50:21,175 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:50:21,175 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 16:50:21,176 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 16:50:21,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:50:21,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 16:50:21,176 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:50:21,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 16:50:21,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:50:21,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 16:50:21,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:50:21,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:50:21,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:50:21,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:50:21,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 16:50:21,177 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 16:50:21,177 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 16:50:21,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 16:50:21,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:50:21,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:50:21,178 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:/tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dcedd10b8fa79fdd7f584d24ebbda0efe903404a [2020-12-09 16:50:21,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:50:21,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:50:21,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:50:21,439 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:50:21,440 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:50:21,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/../../sv-benchmarks/c/floats-cbmc-regression/float20.i [2020-12-09 16:50:21,480 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/data/1a3a09936/e49f09af218049da9eb60222c60dd86a/FLAG8dcaa0846 [2020-12-09 16:50:21,846 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:50:21,846 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/sv-benchmarks/c/floats-cbmc-regression/float20.i [2020-12-09 16:50:21,851 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/data/1a3a09936/e49f09af218049da9eb60222c60dd86a/FLAG8dcaa0846 [2020-12-09 16:50:21,860 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/data/1a3a09936/e49f09af218049da9eb60222c60dd86a [2020-12-09 16:50:21,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:50:21,862 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:50:21,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:50:21,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:50:21,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:50:21,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:50:21" (1/1) ... [2020-12-09 16:50:21,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a1fc43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:21, skipping insertion in model container [2020-12-09 16:50:21,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:50:21" (1/1) ... [2020-12-09 16:50:21,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:50:21,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:50:21,989 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/sv-benchmarks/c/floats-cbmc-regression/float20.i[1032,1045] [2020-12-09 16:50:21,997 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/sv-benchmarks/c/floats-cbmc-regression/float20.i[1306,1319] [2020-12-09 16:50:22,002 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/sv-benchmarks/c/floats-cbmc-regression/float20.i[1464,1477] [2020-12-09 16:50:22,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:50:22,017 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:50:22,030 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/sv-benchmarks/c/floats-cbmc-regression/float20.i[1032,1045] [2020-12-09 16:50:22,034 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/sv-benchmarks/c/floats-cbmc-regression/float20.i[1306,1319] [2020-12-09 16:50:22,036 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/sv-benchmarks/c/floats-cbmc-regression/float20.i[1464,1477] [2020-12-09 16:50:22,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:50:22,054 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:50:22,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:22 WrapperNode [2020-12-09 16:50:22,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:50:22,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:50:22,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:50:22,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:50:22,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:22" (1/1) ... [2020-12-09 16:50:22,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:22" (1/1) ... [2020-12-09 16:50:22,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:50:22,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:50:22,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:50:22,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:50:22,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:22" (1/1) ... [2020-12-09 16:50:22,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:22" (1/1) ... [2020-12-09 16:50:22,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:22" (1/1) ... [2020-12-09 16:50:22,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:22" (1/1) ... [2020-12-09 16:50:22,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:22" (1/1) ... [2020-12-09 16:50:22,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:22" (1/1) ... [2020-12-09 16:50:22,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:22" (1/1) ... [2020-12-09 16:50:22,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:50:22,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:50:22,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:50:22,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:50:22,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/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 [2020-12-09 16:50:22,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 16:50:22,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:50:22,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:50:22,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:50:24,895 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:50:24,895 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 16:50:24,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:50:24 BoogieIcfgContainer [2020-12-09 16:50:24,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:50:24,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:50:24,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:50:24,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:50:24,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:50:21" (1/3) ... [2020-12-09 16:50:24,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ea9cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:50:24, skipping insertion in model container [2020-12-09 16:50:24,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:22" (2/3) ... [2020-12-09 16:50:24,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ea9cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:50:24, skipping insertion in model container [2020-12-09 16:50:24,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:50:24" (3/3) ... [2020-12-09 16:50:24,904 INFO L111 eAbstractionObserver]: Analyzing ICFG float20.i [2020-12-09 16:50:24,915 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:50:24,917 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 16:50:24,924 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 16:50:24,940 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:50:24,940 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 16:50:24,940 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:50:24,940 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:50:24,940 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:50:24,941 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:50:24,941 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:50:24,941 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:50:24,949 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-09 16:50:24,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 16:50:24,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:50:24,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 16:50:24,952 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:50:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:50:24,956 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2020-12-09 16:50:24,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:50:24,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118718248] [2020-12-09 16:50:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/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 [2020-12-09 16:50:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:50:25,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 16:50:25,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:50:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:50:25,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:50:25,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118718248] [2020-12-09 16:50:25,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:50:25,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:50:25,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925957718] [2020-12-09 16:50:25,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 16:50:25,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:50:25,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 16:50:25,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 16:50:25,087 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-09 16:50:25,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:50:25,097 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2020-12-09 16:50:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 16:50:25,098 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-09 16:50:25,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:50:25,108 INFO L225 Difference]: With dead ends: 43 [2020-12-09 16:50:25,108 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 16:50:25,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 16:50:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 16:50:25,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 16:50:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 16:50:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2020-12-09 16:50:25,131 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 6 [2020-12-09 16:50:25,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:50:25,131 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2020-12-09 16:50:25,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 16:50:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2020-12-09 16:50:25,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 16:50:25,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:50:25,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 16:50:25,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 16:50:25,333 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:50:25,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:50:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2020-12-09 16:50:25,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:50:25,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131677767] [2020-12-09 16:50:25,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/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 [2020-12-09 16:50:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:50:25,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 16:50:25,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:50:25,699 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-09 16:50:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:50:25,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:50:25,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131677767] [2020-12-09 16:50:25,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:50:25,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:50:25,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382824061] [2020-12-09 16:50:25,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:50:25,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:50:25,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:50:25,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:50:25,729 INFO L87 Difference]: Start difference. First operand 19 states and 18 transitions. Second operand 5 states. [2020-12-09 16:50:26,073 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-09 16:50:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:50:28,527 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2020-12-09 16:50:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 16:50:28,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-09 16:50:28,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:50:28,528 INFO L225 Difference]: With dead ends: 19 [2020-12-09 16:50:28,528 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 16:50:28,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 16:50:28,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 16:50:28,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 16:50:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 16:50:28,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 16 transitions. [2020-12-09 16:50:28,531 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 16 transitions. Word has length 6 [2020-12-09 16:50:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:50:28,531 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 16 transitions. [2020-12-09 16:50:28,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:50:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 16 transitions. [2020-12-09 16:50:28,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 16:50:28,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:50:28,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:50:28,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 16:50:28,734 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:50:28,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:50:28,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1928169781, now seen corresponding path program 1 times [2020-12-09 16:50:28,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:50:28,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664643552] [2020-12-09 16:50:28,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 16:50:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:50:29,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 16:50:29,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:50:40,806 WARN L197 SmtUtils]: Spent 7.17 s on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 16:50:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:50:41,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:50:41,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664643552] [2020-12-09 16:50:41,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:50:41,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:50:41,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276821773] [2020-12-09 16:50:41,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:50:41,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:50:41,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:50:41,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:50:42,000 INFO L87 Difference]: Start difference. First operand 17 states and 16 transitions. Second operand 5 states. [2020-12-09 16:50:55,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:50:55,045 INFO L93 Difference]: Finished difference Result 17 states and 16 transitions. [2020-12-09 16:50:55,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 16:50:55,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 16:50:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:50:55,046 INFO L225 Difference]: With dead ends: 17 [2020-12-09 16:50:55,046 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 16:50:55,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:50:55,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 16:50:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 16:50:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 16:50:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-12-09 16:50:55,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 10 [2020-12-09 16:50:55,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:50:55,051 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-12-09 16:50:55,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:50:55,052 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-12-09 16:50:55,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 16:50:55,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:50:55,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:50:55,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 16:50:55,254 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:50:55,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:50:55,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1162826544, now seen corresponding path program 1 times [2020-12-09 16:50:55,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 16:50:55,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747251368] [2020-12-09 16:50:55,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 16:50:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:50:55,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 16:50:55,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:50:56,157 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 16:50:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:50:56,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 16:50:56,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747251368] [2020-12-09 16:50:56,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:50:56,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:50:56,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432261590] [2020-12-09 16:50:56,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:50:56,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 16:50:56,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:50:56,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 16:50:56,199 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 5 states. [2020-12-09 16:50:59,569 WARN L197 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-12-09 16:50:59,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:50:59,570 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2020-12-09 16:50:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 16:50:59,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-09 16:50:59,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:50:59,571 INFO L225 Difference]: With dead ends: 15 [2020-12-09 16:50:59,571 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 16:50:59,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 16:50:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 16:50:59,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 16:50:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 16:50:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 16:50:59,572 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-12-09 16:50:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:50:59,572 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 16:50:59,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:50:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 16:50:59,572 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 16:50:59,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 16:50:59,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 16:50:59,973 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-09 16:51:08,523 WARN L197 SmtUtils]: Spent 8.55 s on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 16:51:08,525 INFO L262 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-12-09 16:51:08,525 INFO L262 CegarLoopResult]: For program point L27-2(line 27) no Hoare annotation was computed. [2020-12-09 16:51:08,525 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 32) no Hoare annotation was computed. [2020-12-09 16:51:08,525 INFO L262 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-12-09 16:51:08,526 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-09 16:51:08,526 INFO L262 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-12-09 16:51:08,526 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 16:51:08,526 INFO L258 CegarLoopResult]: At program point L32-3(lines 26 35) the Hoare annotation is: (and (= currentRoundingMode roundNearestTiesToEven) (exists ((ULTIMATE.start_bugBrokenOut_~min (_ FloatingPoint 8 24))) (and (= ULTIMATE.start_bugBrokenOut_~ulpdiff~1 ((_ to_fp 8 24) currentRoundingMode (fp.mul currentRoundingMode ((_ to_fp 11 53) currentRoundingMode ULTIMATE.start_bugBrokenOut_~min) ((_ to_fp 11 53) currentRoundingMode ((_ to_fp 8 24) currentRoundingMode (fp.mul currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (/ 1.0 8388608.0)) ((_ to_fp 11 53) currentRoundingMode (_ bv2 32)))))))) (fp.eq ULTIMATE.start_bugBrokenOut_~min ((_ to_fp 8 24) currentRoundingMode (/ 16777215.0 340282366920938463463374607431768211456.0)))))) [2020-12-09 16:51:08,526 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-09 16:51:08,526 INFO L265 CegarLoopResult]: At program point L57(lines 47 58) the Hoare annotation is: true [2020-12-09 16:51:08,526 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2020-12-09 16:51:08,526 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 16:51:08,526 INFO L262 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-12-09 16:51:08,526 INFO L262 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-12-09 16:51:08,527 INFO L258 CegarLoopResult]: At program point L21-3(lines 16 24) the Hoare annotation is: (and (fp.eq ULTIMATE.start_bug_~min ((_ to_fp 8 24) currentRoundingMode (/ 16777215.0 340282366920938463463374607431768211456.0))) (= currentRoundingMode roundNearestTiesToEven) (exists ((ULTIMATE.start_bug_~min (_ FloatingPoint 8 24))) (and (fp.eq ULTIMATE.start_bug_~min ((_ to_fp 8 24) currentRoundingMode (/ 16777215.0 340282366920938463463374607431768211456.0))) (= ULTIMATE.start_bug_~ulpdiff~0 (fp.mul currentRoundingMode ULTIMATE.start_bug_~min ((_ to_fp 8 24) currentRoundingMode (fp.mul currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (/ 1.0 8388608.0)) ((_ to_fp 11 53) currentRoundingMode (_ bv2 32))))))))) [2020-12-09 16:51:08,527 INFO L262 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-12-09 16:51:08,527 INFO L262 CegarLoopResult]: For program point L17-2(line 17) no Hoare annotation was computed. [2020-12-09 16:51:08,527 INFO L262 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-12-09 16:51:08,527 INFO L262 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-12-09 16:51:08,527 INFO L265 CegarLoopResult]: At program point L42-3(lines 37 45) the Hoare annotation is: true [2020-12-09 16:51:08,527 INFO L262 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-12-09 16:51:08,527 INFO L262 CegarLoopResult]: For program point L38-2(line 38) no Hoare annotation was computed. [2020-12-09 16:51:08,527 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 42) no Hoare annotation was computed. [2020-12-09 16:51:08,534 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2020-12-09 16:51:08,535 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bug_~min,QUANTIFIED] [2020-12-09 16:51:08,535 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bug_~min,QUANTIFIED] [2020-12-09 16:51:08,537 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2020-12-09 16:51:08,537 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bug_~min,QUANTIFIED] [2020-12-09 16:51:08,538 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bug_~min,QUANTIFIED] [2020-12-09 16:51:08,539 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2020-12-09 16:51:08,539 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bugBrokenOut_~min,QUANTIFIED] [2020-12-09 16:51:08,539 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bugBrokenOut_~min,QUANTIFIED] [2020-12-09 16:51:08,540 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2020-12-09 16:51:08,540 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bugBrokenOut_~min,QUANTIFIED] [2020-12-09 16:51:08,540 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bugBrokenOut_~min,QUANTIFIED] [2020-12-09 16:51:08,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:51:08 BoogieIcfgContainer [2020-12-09 16:51:08,542 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:51:08,542 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:51:08,542 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:51:08,542 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:51:08,542 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:50:24" (3/4) ... [2020-12-09 16:51:08,545 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 16:51:08,552 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-12-09 16:51:08,552 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 16:51:08,552 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 16:51:08,552 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 16:51:08,568 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (~fp.eq~DOUBLE(min, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 16777215/340282366920938463463374607431768211456)) && unknown-currentRoundingMode-unknown == ~roundNearestTiesToEven) && (\exists ULTIMATE.start_bug_~min : C_FLOAT :: ~fp.eq~DOUBLE(ULTIMATE.start_bug_~min, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 16777215/340282366920938463463374607431768211456)) && ulpdiff == ~fp.mul~FLOAT(unknown-currentRoundingMode-unknown, ULTIMATE.start_bug_~min, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, ~fp.mul~FLOAT(unknown-currentRoundingMode-unknown, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 1/8388608), ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 2bv32))))) [2020-12-09 16:51:08,568 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: unknown-currentRoundingMode-unknown == ~roundNearestTiesToEven && (\exists ULTIMATE.start_bugBrokenOut_~min : C_FLOAT :: ulpdiff == ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, ~fp.mul~FLOAT(unknown-currentRoundingMode-unknown, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, ULTIMATE.start_bugBrokenOut_~min), ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, ~fp.mul~FLOAT(unknown-currentRoundingMode-unknown, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 1/8388608), ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 2bv32)))))) && ~fp.eq~DOUBLE(ULTIMATE.start_bugBrokenOut_~min, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 16777215/340282366920938463463374607431768211456))) [2020-12-09 16:51:08,578 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1af7be9b-a423-4844-b1fc-02da12fb3563/bin/utaipan/witness.graphml [2020-12-09 16:51:08,578 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:51:08,579 INFO L168 Benchmark]: Toolchain (without parser) took 46716.44 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 24.5 MB in the beginning and 34.7 MB in the end (delta: -10.2 MB). Peak memory consumption was 2.0 MB. Max. memory is 16.1 GB. [2020-12-09 16:51:08,579 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 48.2 MB. Free memory was 31.0 MB in the beginning and 30.9 MB in the end (delta: 60.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:51:08,580 INFO L168 Benchmark]: CACSL2BoogieTranslator took 191.91 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 24.3 MB in the beginning and 45.3 MB in the end (delta: -21.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2020-12-09 16:51:08,580 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.78 ms. Allocated memory is still 60.8 MB. Free memory was 45.1 MB in the beginning and 43.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:51:08,581 INFO L168 Benchmark]: Boogie Preprocessor took 26.83 ms. Allocated memory is still 60.8 MB. Free memory was 43.6 MB in the beginning and 42.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:51:08,581 INFO L168 Benchmark]: RCFGBuilder took 2774.63 ms. Allocated memory is still 60.8 MB. Free memory was 42.4 MB in the beginning and 42.7 MB in the end (delta: -294.3 kB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2020-12-09 16:51:08,581 INFO L168 Benchmark]: TraceAbstraction took 43643.59 ms. Allocated memory is still 60.8 MB. Free memory was 42.2 MB in the beginning and 37.5 MB in the end (delta: 4.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. [2020-12-09 16:51:08,582 INFO L168 Benchmark]: Witness Printer took 36.19 ms. Allocated memory is still 60.8 MB. Free memory was 37.5 MB in the beginning and 34.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 16:51:08,583 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 48.2 MB. Free memory was 31.0 MB in the beginning and 30.9 MB in the end (delta: 60.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 191.91 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 24.3 MB in the beginning and 45.3 MB in the end (delta: -21.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.78 ms. Allocated memory is still 60.8 MB. Free memory was 45.1 MB in the beginning and 43.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.83 ms. Allocated memory is still 60.8 MB. Free memory was 43.6 MB in the beginning and 42.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2774.63 ms. Allocated memory is still 60.8 MB. Free memory was 42.4 MB in the beginning and 42.7 MB in the end (delta: -294.3 kB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 43643.59 ms. Allocated memory is still 60.8 MB. Free memory was 42.2 MB in the beginning and 37.5 MB in the end (delta: 4.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. * Witness Printer took 36.19 ms. Allocated memory is still 60.8 MB. Free memory was 37.5 MB in the beginning and 34.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bug_~min,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bug_~min,QUANTIFIED] - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bug_~min,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bug_~min,QUANTIFIED] - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bugBrokenOut_~min,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bugBrokenOut_~min,QUANTIFIED] - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bugBrokenOut_~min,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bugBrokenOut_~min,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 32]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 42]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 16]: Loop Invariant [2020-12-09 16:51:08,588 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2020-12-09 16:51:08,588 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bug_~min,QUANTIFIED] [2020-12-09 16:51:08,588 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bug_~min,QUANTIFIED] [2020-12-09 16:51:08,588 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2020-12-09 16:51:08,589 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bug_~min,QUANTIFIED] [2020-12-09 16:51:08,589 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bug_~min,QUANTIFIED] Derived loop invariant: (~fp.eq~DOUBLE(min, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 16777215/340282366920938463463374607431768211456)) && unknown-currentRoundingMode-unknown == ~roundNearestTiesToEven) && (\exists ULTIMATE.start_bug_~min : C_FLOAT :: ~fp.eq~DOUBLE(ULTIMATE.start_bug_~min, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 16777215/340282366920938463463374607431768211456)) && ulpdiff == ~fp.mul~FLOAT(unknown-currentRoundingMode-unknown, ULTIMATE.start_bug_~min, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, ~fp.mul~FLOAT(unknown-currentRoundingMode-unknown, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 1/8388608), ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 2bv32))))) - InvariantResult [Line: 26]: Loop Invariant [2020-12-09 16:51:08,589 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2020-12-09 16:51:08,589 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bugBrokenOut_~min,QUANTIFIED] [2020-12-09 16:51:08,589 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bugBrokenOut_~min,QUANTIFIED] [2020-12-09 16:51:08,590 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Declaration ConstDeclaration not handled for expression ~roundNearestTiesToEven [2020-12-09 16:51:08,590 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bugBrokenOut_~min,QUANTIFIED] [2020-12-09 16:51:08,590 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_bugBrokenOut_~min,QUANTIFIED] Derived loop invariant: unknown-currentRoundingMode-unknown == ~roundNearestTiesToEven && (\exists ULTIMATE.start_bugBrokenOut_~min : C_FLOAT :: ulpdiff == ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, ~fp.mul~FLOAT(unknown-currentRoundingMode-unknown, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, ULTIMATE.start_bugBrokenOut_~min), ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, ~fp.mul~FLOAT(unknown-currentRoundingMode-unknown, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 1/8388608), ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 2bv32)))))) && ~fp.eq~DOUBLE(ULTIMATE.start_bugBrokenOut_~min, ~to_fp~LONGDOUBLE(unknown-currentRoundingMode-unknown, 16777215/340282366920938463463374607431768211456))) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 34.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 19.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 8.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 18 SDslu, 14 SDs, 0 SdLazy, 61 SolverSat, 0 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 18.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 8 NumberOfFragments, 65 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 8.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 14.0s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 3 QuantifiedInterpolants, 1503 SizeOfPredicates, 12 NumberOfNonLiveVariables, 126 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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 correct! Received shutdown request...