./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI --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 1d97d268d682e2021ff98bdbb1deaf100696d038 ............................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI --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 1d97d268d682e2021ff98bdbb1deaf100696d038 ............................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:25:58,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:25:58,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:25:58,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:25:58,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:25:58,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:25:58,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:25:58,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:25:58,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:25:58,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:25:58,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:25:58,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:25:58,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:25:58,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:25:58,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:25:58,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:25:58,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:25:58,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:25:58,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:25:58,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:25:58,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:25:58,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:25:58,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:25:58,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:25:58,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:25:58,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:25:58,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:25:58,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:25:58,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:25:58,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:25:58,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:25:58,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:25:58,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:25:58,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:25:58,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:25:58,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:25:58,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:25:58,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:25:58,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:25:58,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:25:58,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:25:58,784 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:25:58,830 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:25:58,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:25:58,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:25:58,832 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:25:58,832 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:25:58,833 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:25:58,833 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:25:58,833 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:25:58,834 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:25:58,834 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:25:58,841 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:25:58,841 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:25:58,841 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:25:58,842 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:25:58,842 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:25:58,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:25:58,843 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:25:58,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:25:58,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:25:58,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:25:58,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:25:58,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:25:58,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:25:58,845 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:25:58,845 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:25:58,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:25:58,846 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:25:58,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:25:58,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:25:58,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:25:58,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:25:58,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:25:58,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:25:58,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:25:58,849 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:25:58,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:25:58,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:25:58,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:25:58,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:25:58,851 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_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2021-10-11 02:25:59,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:25:59,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:25:59,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:25:59,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:25:59,168 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:25:59,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-10-11 02:25:59,243 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/data/bffa3329e/70eb224004124fff982e10cedffad04d/FLAGa3ce7d307 [2021-10-11 02:25:59,751 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:25:59,751 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-10-11 02:25:59,760 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/data/bffa3329e/70eb224004124fff982e10cedffad04d/FLAGa3ce7d307 [2021-10-11 02:26:00,236 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/data/bffa3329e/70eb224004124fff982e10cedffad04d [2021-10-11 02:26:00,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:00,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:00,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:00,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:00,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:00,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6886740a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00, skipping insertion in model container [2021-10-11 02:26:00,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:00,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:00,438 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/sv-benchmarks/c/float-benchs/sqrt_poly2.c[587,600] [2021-10-11 02:26:00,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:00,468 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:00,481 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/sv-benchmarks/c/float-benchs/sqrt_poly2.c[587,600] [2021-10-11 02:26:00,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:00,506 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:00,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00 WrapperNode [2021-10-11 02:26:00,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:00,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:00,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:00,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:00,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:00,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:00,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:00,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:00,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... [2021-10-11 02:26:00,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:00,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:00,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:00,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:00,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:26:00,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:26:00,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:00,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-10-11 02:26:00,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:26:00,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-11 02:26:00,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:00,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:00,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:26:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:26:01,226 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:01,227 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-11 02:26:01,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:01 BoogieIcfgContainer [2021-10-11 02:26:01,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:01,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:01,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:01,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:01,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:00" (1/3) ... [2021-10-11 02:26:01,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24af2549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:01, skipping insertion in model container [2021-10-11 02:26:01,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:00" (2/3) ... [2021-10-11 02:26:01,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24af2549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:01, skipping insertion in model container [2021-10-11 02:26:01,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:01" (3/3) ... [2021-10-11 02:26:01,239 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2021-10-11 02:26:01,255 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:01,258 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:26:01,275 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:26:01,302 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:01,302 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:26:01,302 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:01,303 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:01,303 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:01,303 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:01,303 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:01,303 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2021-10-11 02:26:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:26:01,320 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:01,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:26:01,321 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:01,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:01,326 INFO L82 PathProgramCache]: Analyzing trace with hash 70827, now seen corresponding path program 1 times [2021-10-11 02:26:01,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:01,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205595466] [2021-10-11 02:26:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:01,474 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:01,516 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:01,538 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:26:01,539 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:26:01,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:26:01,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:01 BoogieIcfgContainer [2021-10-11 02:26:01,583 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:01,585 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:01,586 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:01,587 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:01,588 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:01" (3/4) ... [2021-10-11 02:26:01,591 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:26:01,591 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:01,594 INFO L168 Benchmark]: Toolchain (without parser) took 1352.07 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 64.9 MB in the beginning and 76.1 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:01,595 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 102.8 MB. Free memory was 73.0 MB in the beginning and 73.0 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:01,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.36 ms. Allocated memory is still 102.8 MB. Free memory was 64.8 MB in the beginning and 71.8 MB in the end (delta: -7.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:01,597 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.57 ms. Allocated memory is still 102.8 MB. Free memory was 71.8 MB in the beginning and 70.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:01,598 INFO L168 Benchmark]: Boogie Preprocessor took 25.77 ms. Allocated memory is still 102.8 MB. Free memory was 70.3 MB in the beginning and 69.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:01,599 INFO L168 Benchmark]: RCFGBuilder took 656.60 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 69.0 MB in the beginning and 91.7 MB in the end (delta: -22.7 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:01,600 INFO L168 Benchmark]: TraceAbstraction took 353.07 ms. Allocated memory is still 123.7 MB. Free memory was 91.0 MB in the beginning and 76.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:01,601 INFO L168 Benchmark]: Witness Printer took 6.73 ms. Allocated memory is still 123.7 MB. Free memory was 76.4 MB in the beginning and 76.1 MB in the end (delta: 246.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:01,607 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 102.8 MB. Free memory was 73.0 MB in the beginning and 73.0 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 265.36 ms. Allocated memory is still 102.8 MB. Free memory was 64.8 MB in the beginning and 71.8 MB in the end (delta: -7.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.57 ms. Allocated memory is still 102.8 MB. Free memory was 71.8 MB in the beginning and 70.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.77 ms. Allocated memory is still 102.8 MB. Free memory was 70.3 MB in the beginning and 69.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 656.60 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 69.0 MB in the beginning and 91.7 MB in the end (delta: -22.7 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 353.07 ms. Allocated memory is still 123.7 MB. Free memory was 91.0 MB in the beginning and 76.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Witness Printer took 6.73 ms. Allocated memory is still 123.7 MB. Free memory was 76.4 MB in the beginning and 76.1 MB in the end (delta: 246.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 38, overapproximation of someUnaryDOUBLEoperation at line 20, overapproximation of someBinaryArithmeticDOUBLEoperation at line 39, overapproximation of bitwiseAnd at line 37, overapproximation of someBinaryDOUBLEComparisonOperation at line 61. Possible FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L12] COND FALSE !(!cond) [L31] union u x; [L32] double r; [L33] int exp; [L35] x.d = a [L37] EXPR x.i[0] [L37] exp = (x.i[0] & 0x7FF00000) >> 20 [L38] EXPR x.i[0] [L38] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L39] EXPR x.d [L39] r = x.d * 0.5 [L41] r = C1+C2+(C3+(C4+C5*r)*r)*r [L43] COND TRUE exp % 2 == 0 [L44] exp++ [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] r = r * x.d [L53] return r; [L53] return r; [L63] y = sqrt_custom(x) [L14] COND TRUE !(cond) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L14] reach_error() VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, 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=6occurred 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 [2021-10-11 02:26:04,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:26:04,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:26:04,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:26:04,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:26:04,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:26:04,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:26:04,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:26:04,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:26:04,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:26:04,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:26:04,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:26:04,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:26:04,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:26:04,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:26:04,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:26:04,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:26:04,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:26:04,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:26:04,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:26:04,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:26:04,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:26:04,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:26:04,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:26:04,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:26:04,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:26:04,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:26:04,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:26:04,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:26:04,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:26:04,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:26:04,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:26:04,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:26:04,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:26:04,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:26:04,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:26:04,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:26:04,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:26:04,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:26:04,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:26:04,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:26:04,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-11 02:26:04,303 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:26:04,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:26:04,305 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:26:04,305 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:26:04,306 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:26:04,306 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:26:04,306 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:26:04,306 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:26:04,307 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:26:04,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:26:04,309 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:26:04,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:26:04,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:26:04,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:26:04,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:26:04,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:26:04,311 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:26:04,311 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:26:04,311 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:26:04,312 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:26:04,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:26:04,312 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:26:04,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:26:04,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:26:04,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:26:04,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:26:04,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:04,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:26:04,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:26:04,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:26:04,314 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:26:04,314 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:26:04,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:26:04,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:26:04,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:26:04,316 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_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2021-10-11 02:26:04,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:26:04,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:26:04,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:26:04,747 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:26:04,748 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:26:04,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-10-11 02:26:04,829 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/data/746bfc348/291b6b914e8e4a86bc0de248ae9dca2b/FLAGe51fef6df [2021-10-11 02:26:05,427 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:05,427 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-10-11 02:26:05,436 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/data/746bfc348/291b6b914e8e4a86bc0de248ae9dca2b/FLAGe51fef6df [2021-10-11 02:26:05,757 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/data/746bfc348/291b6b914e8e4a86bc0de248ae9dca2b [2021-10-11 02:26:05,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:05,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:05,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:05,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:05,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:05,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:05" (1/1) ... [2021-10-11 02:26:05,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb94310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:05, skipping insertion in model container [2021-10-11 02:26:05,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:05" (1/1) ... [2021-10-11 02:26:05,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:05,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:05,946 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/sv-benchmarks/c/float-benchs/sqrt_poly2.c[587,600] [2021-10-11 02:26:05,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:06,011 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:06,050 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/sv-benchmarks/c/float-benchs/sqrt_poly2.c[587,600] [2021-10-11 02:26:06,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:06,102 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:06,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06 WrapperNode [2021-10-11 02:26:06,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:06,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:06,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:06,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:06,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:06,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:06,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:06,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:06,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... [2021-10-11 02:26:06,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:06,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:06,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:06,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:06,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:26:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-10-11 02:26:06,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-10-11 02:26:06,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:26:06,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-11 02:26:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:06,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:26:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-11 02:26:12,984 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:12,984 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-11 02:26:12,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:12 BoogieIcfgContainer [2021-10-11 02:26:12,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:12,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:12,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:12,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:12,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:05" (1/3) ... [2021-10-11 02:26:12,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d45e9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:12, skipping insertion in model container [2021-10-11 02:26:12,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:06" (2/3) ... [2021-10-11 02:26:12,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d45e9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:12, skipping insertion in model container [2021-10-11 02:26:12,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:12" (3/3) ... [2021-10-11 02:26:12,996 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2021-10-11 02:26:13,011 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:13,015 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:26:13,027 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:26:13,052 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:13,053 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:26:13,053 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:13,053 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:13,053 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:13,053 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:13,053 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:13,054 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2021-10-11 02:26:13,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:26:13,071 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:13,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:13,072 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:13,078 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2021-10-11 02:26:13,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:26:13,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700435814] [2021-10-11 02:26:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:26:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:14,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:26:14,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:14,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:26:14,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700435814] [2021-10-11 02:26:14,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:14,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:14,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061337562] [2021-10-11 02:26:14,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:26:14,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:26:14,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:26:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:26:14,817 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2021-10-11 02:26:14,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:14,832 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-11 02:26:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:26:14,833 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-10-11 02:26:14,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:14,842 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:26:14,842 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 02:26:14,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:26:14,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 02:26:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-11 02:26:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:26:14,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-10-11 02:26:14,875 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2021-10-11 02:26:14,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:14,876 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-10-11 02:26:14,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:26:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-10-11 02:26:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:26:14,876 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:14,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:15,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:26:15,079 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:15,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:15,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2021-10-11 02:26:15,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:26:15,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542579992] [2021-10-11 02:26:15,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:26:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:24,174 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:26:30,242 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:26:30,382 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-11 02:26:30,383 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:26:30,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:26:30,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:30 BoogieIcfgContainer [2021-10-11 02:26:30,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:30,623 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:30,624 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:30,624 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:30,624 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:12" (3/4) ... [2021-10-11 02:26:30,626 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:26:30,688 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5186fa2a-4f30-4ab5-bc0e-fe51892d4a9a/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:26:30,688 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:30,690 INFO L168 Benchmark]: Toolchain (without parser) took 24919.83 ms. Allocated memory is still 83.9 MB. Free memory was 64.9 MB in the beginning and 40.0 MB in the end (delta: 24.9 MB). Peak memory consumption was 21.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:30,699 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 54.5 MB. Free memory is still 35.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:30,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.60 ms. Allocated memory is still 83.9 MB. Free memory was 64.7 MB in the beginning and 66.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:30,701 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.51 ms. Allocated memory is still 83.9 MB. Free memory was 66.1 MB in the beginning and 64.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:30,701 INFO L168 Benchmark]: Boogie Preprocessor took 62.74 ms. Allocated memory is still 83.9 MB. Free memory was 64.4 MB in the beginning and 63.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:30,703 INFO L168 Benchmark]: RCFGBuilder took 6742.85 ms. Allocated memory is still 83.9 MB. Free memory was 63.0 MB in the beginning and 47.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:30,704 INFO L168 Benchmark]: TraceAbstraction took 17634.55 ms. Allocated memory is still 83.9 MB. Free memory was 46.8 MB in the beginning and 42.4 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:30,704 INFO L168 Benchmark]: Witness Printer took 64.55 ms. Allocated memory is still 83.9 MB. Free memory was 42.4 MB in the beginning and 40.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:30,710 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 54.5 MB. Free memory is still 35.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 327.60 ms. Allocated memory is still 83.9 MB. Free memory was 64.7 MB in the beginning and 66.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.51 ms. Allocated memory is still 83.9 MB. Free memory was 66.1 MB in the beginning and 64.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.74 ms. Allocated memory is still 83.9 MB. Free memory was 64.4 MB in the beginning and 63.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 6742.85 ms. Allocated memory is still 83.9 MB. Free memory was 63.0 MB in the beginning and 47.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17634.55 ms. Allocated memory is still 83.9 MB. Free memory was 46.8 MB in the beginning and 42.4 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.1 MB. Max. memory is 16.1 GB. * Witness Printer took 64.55 ms. Allocated memory is still 83.9 MB. Free memory was 42.4 MB in the beginning and 40.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L12] COND FALSE !(!cond) VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L31] union u x; [L32] double r; [L33] int exp; [L35] x.d = a [L37] EXPR x.i[0] [L37] exp = (x.i[0] & 0x7FF00000) >> 20 [L38] EXPR x.i[0] [L38] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L39] EXPR x.d [L39] r = x.d * 0.5 [L41] r = C1+C2+(C3+(C4+C5*r)*r)*r VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L43] COND TRUE exp % 2 == 0 [L44] exp++ VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] r = r * x.d [L53] return r; [L53] return r; VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L63] y = sqrt_custom(x) [L14] COND TRUE !(cond) VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L14] reach_error() VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 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: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 10.4s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 64 SizeOfPredicates, 0 NumberOfNonLiveVariables, 56 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...