./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cdfpl/square_3.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_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_3.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/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 df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 ................................................................................................................................................................................................................................................ 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_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_3.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/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 df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 ........................................................................................................................................................................................................................................................................................... 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 [2020-12-09 08:56:56,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:56:56,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:56:56,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:56:56,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:56:56,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:56:56,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:56:56,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:56:56,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:56:56,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:56:56,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:56:56,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:56:56,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:56:56,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:56:56,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:56:56,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:56:56,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:56:56,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:56:56,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:56:56,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:56:56,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:56:56,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:56:56,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:56:56,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:56:56,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:56:56,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:56:56,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:56:56,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:56:56,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:56:56,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:56:56,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:56:56,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:56:56,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:56:56,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:56:56,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:56:56,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:56:56,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:56:56,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:56:56,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:56:56,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:56:56,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:56:56,669 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 08:56:56,690 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:56:56,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:56:56,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:56:56,691 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:56:56,691 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:56:56,692 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:56:56,692 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:56:56,692 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:56:56,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:56:56,692 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:56:56,692 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:56:56,693 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:56:56,693 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:56:56,693 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:56:56,693 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:56:56,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:56:56,694 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:56:56,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:56:56,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:56:56,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:56:56,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:56:56,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:56:56,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:56:56,694 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:56:56,695 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:56:56,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:56:56,695 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:56:56,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:56:56,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:56:56,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:56:56,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:56:56,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:56:56,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:56:56,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:56:56,696 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:56:56,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:56:56,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:56:56,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:56:56,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:56:56,696 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_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 [2020-12-09 08:56:56,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:56:56,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:56:56,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:56:56,898 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:56:56,898 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:56:56,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/../../sv-benchmarks/c/floats-cdfpl/square_3.i [2020-12-09 08:56:56,940 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/data/21725a50a/0416b04ecdcd46fba631a0df7862449b/FLAGff554bc36 [2020-12-09 08:56:57,311 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:56:57,311 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/sv-benchmarks/c/floats-cdfpl/square_3.i [2020-12-09 08:56:57,315 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/data/21725a50a/0416b04ecdcd46fba631a0df7862449b/FLAGff554bc36 [2020-12-09 08:56:57,325 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/data/21725a50a/0416b04ecdcd46fba631a0df7862449b [2020-12-09 08:56:57,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:56:57,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:56:57,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:56:57,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:56:57,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:56:57,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:56:57" (1/1) ... [2020-12-09 08:56:57,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30110e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:57, skipping insertion in model container [2020-12-09 08:56:57,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:56:57" (1/1) ... [2020-12-09 08:56:57,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:56:57,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:56:57,466 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_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/sv-benchmarks/c/floats-cdfpl/square_3.i[1131,1144] [2020-12-09 08:56:57,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:56:57,478 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:56:57,491 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_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/sv-benchmarks/c/floats-cdfpl/square_3.i[1131,1144] [2020-12-09 08:56:57,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:56:57,504 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:56:57,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:57 WrapperNode [2020-12-09 08:56:57,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:56:57,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:56:57,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:56:57,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:56:57,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:57" (1/1) ... [2020-12-09 08:56:57,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:57" (1/1) ... [2020-12-09 08:56:57,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:56:57,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:56:57,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:56:57,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:56:57,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:57" (1/1) ... [2020-12-09 08:56:57,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:57" (1/1) ... [2020-12-09 08:56:57,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:57" (1/1) ... [2020-12-09 08:56:57,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:57" (1/1) ... [2020-12-09 08:56:57,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:57" (1/1) ... [2020-12-09 08:56:57,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:57" (1/1) ... [2020-12-09 08:56:57,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:57" (1/1) ... [2020-12-09 08:56:57,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:56:57,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:56:57,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:56:57,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:56:57,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/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 08:56:57,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 08:56:57,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:56:57,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:56:57,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:56:57,812 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:56:57,812 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-09 08:56:57,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:56:57 BoogieIcfgContainer [2020-12-09 08:56:57,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:56:57,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:56:57,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:56:57,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:56:57,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:56:57" (1/3) ... [2020-12-09 08:56:57,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cfcae23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:56:57, skipping insertion in model container [2020-12-09 08:56:57,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:56:57" (2/3) ... [2020-12-09 08:56:57,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cfcae23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:56:57, skipping insertion in model container [2020-12-09 08:56:57,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:56:57" (3/3) ... [2020-12-09 08:56:57,823 INFO L111 eAbstractionObserver]: Analyzing ICFG square_3.i [2020-12-09 08:56:57,838 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:56:57,840 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 08:56:57,852 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 08:56:57,875 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:56:57,876 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:56:57,876 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:56:57,876 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:56:57,876 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:56:57,876 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:56:57,876 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:56:57,877 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:56:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-12-09 08:56:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 08:56:57,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:56:57,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 08:56:57,892 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:56:57,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:56:57,897 INFO L82 PathProgramCache]: Analyzing trace with hash 56123, now seen corresponding path program 1 times [2020-12-09 08:56:57,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:56:57,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190636308] [2020-12-09 08:56:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:56:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:56:58,001 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:56:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:56:58,022 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:56:58,042 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 08:56:58,043 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 08:56:58,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 08:56:58,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:56:58 BoogieIcfgContainer [2020-12-09 08:56:58,063 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:56:58,064 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:56:58,064 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:56:58,064 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:56:58,065 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:56:57" (3/4) ... [2020-12-09 08:56:58,068 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 08:56:58,068 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:56:58,070 INFO L168 Benchmark]: Toolchain (without parser) took 741.38 ms. Allocated memory is still 98.6 MB. Free memory was 75.4 MB in the beginning and 54.9 MB in the end (delta: 20.5 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2020-12-09 08:56:58,071 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 69.2 MB. Free memory is still 44.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:56:58,072 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.06 ms. Allocated memory is still 98.6 MB. Free memory was 75.4 MB in the beginning and 65.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 08:56:58,073 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.79 ms. Allocated memory is still 98.6 MB. Free memory was 65.5 MB in the beginning and 64.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:56:58,074 INFO L168 Benchmark]: Boogie Preprocessor took 16.74 ms. Allocated memory is still 98.6 MB. Free memory was 64.0 MB in the beginning and 63.4 MB in the end (delta: 652.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:56:58,075 INFO L168 Benchmark]: RCFGBuilder took 265.43 ms. Allocated memory is still 98.6 MB. Free memory was 63.4 MB in the beginning and 67.5 MB in the end (delta: -4.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 08:56:58,076 INFO L168 Benchmark]: TraceAbstraction took 246.72 ms. Allocated memory is still 98.6 MB. Free memory was 66.9 MB in the beginning and 54.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 08:56:58,076 INFO L168 Benchmark]: Witness Printer took 4.53 ms. Allocated memory is still 98.6 MB. Free memory is still 54.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:56:58,081 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 69.2 MB. Free memory is still 44.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 176.06 ms. Allocated memory is still 98.6 MB. Free memory was 75.4 MB in the beginning and 65.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.79 ms. Allocated memory is still 98.6 MB. Free memory was 65.5 MB in the beginning and 64.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.74 ms. Allocated memory is still 98.6 MB. Free memory was 64.0 MB in the beginning and 63.4 MB in the end (delta: 652.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 265.43 ms. Allocated memory is still 98.6 MB. Free memory was 63.4 MB in the beginning and 67.5 MB in the end (delta: -4.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 246.72 ms. Allocated memory is still 98.6 MB. Free memory was 66.9 MB in the beginning and 54.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.53 ms. Allocated memory is still 98.6 MB. Free memory is still 54.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 29]: 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 28, overapproximation of someBinaryArithmeticFLOAToperation at line 26. Possible FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.39843f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 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=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 [2020-12-09 08:56:59,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:56:59,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:56:59,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:56:59,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:56:59,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:56:59,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:56:59,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:56:59,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:56:59,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:56:59,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:56:59,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:56:59,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:56:59,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:56:59,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:56:59,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:56:59,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:56:59,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:56:59,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:56:59,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:56:59,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:56:59,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:56:59,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:56:59,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:56:59,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:56:59,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:56:59,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:56:59,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:56:59,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:56:59,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:56:59,745 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:56:59,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:56:59,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:56:59,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:56:59,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:56:59,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:56:59,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:56:59,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:56:59,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:56:59,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:56:59,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:56:59,750 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 08:56:59,772 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:56:59,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:56:59,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:56:59,773 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:56:59,773 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:56:59,773 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:56:59,773 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:56:59,773 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:56:59,774 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:56:59,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:56:59,774 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:56:59,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:56:59,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:56:59,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:56:59,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:56:59,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:56:59,775 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:56:59,775 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 08:56:59,775 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 08:56:59,776 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:56:59,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:56:59,776 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:56:59,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:56:59,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:56:59,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 08:56:59,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:56:59,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:56:59,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:56:59,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:56:59,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:56:59,777 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 08:56:59,777 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 08:56:59,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:56:59,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:56:59,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:56:59,778 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_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 [2020-12-09 08:56:59,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:57:00,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:57:00,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:57:00,015 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:57:00,016 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:57:00,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/../../sv-benchmarks/c/floats-cdfpl/square_3.i [2020-12-09 08:57:00,056 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/data/fe4acf930/2da407c4ed0b4438a050413bb3a7ec5f/FLAG4919b5cab [2020-12-09 08:57:00,417 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:57:00,417 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/sv-benchmarks/c/floats-cdfpl/square_3.i [2020-12-09 08:57:00,422 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/data/fe4acf930/2da407c4ed0b4438a050413bb3a7ec5f/FLAG4919b5cab [2020-12-09 08:57:00,432 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/data/fe4acf930/2da407c4ed0b4438a050413bb3a7ec5f [2020-12-09 08:57:00,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:57:00,435 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:57:00,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:57:00,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:57:00,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:57:00,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:57:00" (1/1) ... [2020-12-09 08:57:00,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e2db151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:00, skipping insertion in model container [2020-12-09 08:57:00,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:57:00" (1/1) ... [2020-12-09 08:57:00,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:57:00,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:57:00,553 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_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/sv-benchmarks/c/floats-cdfpl/square_3.i[1131,1144] [2020-12-09 08:57:00,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:57:00,566 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:57:00,579 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_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/sv-benchmarks/c/floats-cdfpl/square_3.i[1131,1144] [2020-12-09 08:57:00,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:57:00,594 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:57:00,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:00 WrapperNode [2020-12-09 08:57:00,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:57:00,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:57:00,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:57:00,596 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:57:00,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:00" (1/1) ... [2020-12-09 08:57:00,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:00" (1/1) ... [2020-12-09 08:57:00,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:57:00,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:57:00,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:57:00,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:57:00,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:00" (1/1) ... [2020-12-09 08:57:00,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:00" (1/1) ... [2020-12-09 08:57:00,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:00" (1/1) ... [2020-12-09 08:57:00,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:00" (1/1) ... [2020-12-09 08:57:00,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:00" (1/1) ... [2020-12-09 08:57:00,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:00" (1/1) ... [2020-12-09 08:57:00,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:00" (1/1) ... [2020-12-09 08:57:00,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:57:00,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:57:00,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:57:00,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:57:00,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/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 08:57:00,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 08:57:00,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:57:00,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:57:00,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:57:02,935 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:57:02,935 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-09 08:57:02,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:57:02 BoogieIcfgContainer [2020-12-09 08:57:02,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:57:02,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:57:02,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:57:02,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:57:02,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:57:00" (1/3) ... [2020-12-09 08:57:02,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5926d1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:57:02, skipping insertion in model container [2020-12-09 08:57:02,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:57:00" (2/3) ... [2020-12-09 08:57:02,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5926d1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:57:02, skipping insertion in model container [2020-12-09 08:57:02,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:57:02" (3/3) ... [2020-12-09 08:57:02,943 INFO L111 eAbstractionObserver]: Analyzing ICFG square_3.i [2020-12-09 08:57:02,954 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:57:02,956 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 08:57:02,964 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 08:57:02,980 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:57:02,981 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:57:02,981 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:57:02,981 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:57:02,981 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:57:02,981 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:57:02,981 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:57:02,981 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:57:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 08:57:02,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 08:57:02,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:57:02,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 08:57:02,996 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:57:03,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:57:03,000 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2020-12-09 08:57:03,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:57:03,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890163943] [2020-12-09 08:57:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/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 08:57:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:57:03,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 08:57:03,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:57:03,507 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 08:57:03,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:57:03,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890163943] [2020-12-09 08:57:03,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:57:03,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:57:03,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728094285] [2020-12-09 08:57:03,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 08:57:03,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:57:03,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 08:57:03,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:57:03,523 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-12-09 08:57:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:57:03,532 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-12-09 08:57:03,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 08:57:03,533 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-09 08:57:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:57:03,538 INFO L225 Difference]: With dead ends: 19 [2020-12-09 08:57:03,538 INFO L226 Difference]: Without dead ends: 7 [2020-12-09 08:57:03,540 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 08:57:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-09 08:57:03,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-09 08:57:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-09 08:57:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-12-09 08:57:03,560 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-12-09 08:57:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:57:03,560 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-12-09 08:57:03,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 08:57:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-12-09 08:57:03,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 08:57:03,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:57:03,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 08:57:03,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 08:57:03,761 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:57:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:57:03,762 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2020-12-09 08:57:03,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:57:03,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611088262] [2020-12-09 08:57:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/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 08:57:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:57:22,513 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:59:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:59:53,904 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:59:54,009 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 08:59:54,010 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 08:59:54,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 08:59:54,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:59:54 BoogieIcfgContainer [2020-12-09 08:59:54,255 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:59:54,256 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:59:54,256 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:59:54,256 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:59:54,257 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:57:02" (3/4) ... [2020-12-09 08:59:54,259 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 08:59:54,283 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ddb79d52-d8c5-49ef-9aac-d6a3fe9bc88f/bin/utaipan/witness.graphml [2020-12-09 08:59:54,284 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:59:54,285 INFO L168 Benchmark]: Toolchain (without parser) took 173849.52 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 42.3 MB in the beginning and 40.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. [2020-12-09 08:59:54,285 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 60.8 MB. Free memory is still 43.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:59:54,286 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.92 ms. Allocated memory is still 60.8 MB. Free memory was 42.0 MB in the beginning and 31.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 08:59:54,286 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.80 ms. Allocated memory is still 60.8 MB. Free memory was 31.7 MB in the beginning and 44.9 MB in the end (delta: -13.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:59:54,287 INFO L168 Benchmark]: Boogie Preprocessor took 18.25 ms. Allocated memory is still 60.8 MB. Free memory was 44.9 MB in the beginning and 43.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:59:54,287 INFO L168 Benchmark]: RCFGBuilder took 2279.49 ms. Allocated memory is still 60.8 MB. Free memory was 43.7 MB in the beginning and 33.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 08:59:54,288 INFO L168 Benchmark]: TraceAbstraction took 171317.64 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 32.5 MB in the beginning and 42.2 MB in the end (delta: -9.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. [2020-12-09 08:59:54,288 INFO L168 Benchmark]: Witness Printer took 27.54 ms. Allocated memory is still 79.7 MB. Free memory was 42.2 MB in the beginning and 40.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:59:54,290 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 60.8 MB. Free memory is still 43.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 159.92 ms. Allocated memory is still 60.8 MB. Free memory was 42.0 MB in the beginning and 31.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.80 ms. Allocated memory is still 60.8 MB. Free memory was 31.7 MB in the beginning and 44.9 MB in the end (delta: -13.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.25 ms. Allocated memory is still 60.8 MB. Free memory was 44.9 MB in the beginning and 43.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2279.49 ms. Allocated memory is still 60.8 MB. Free memory was 43.7 MB in the beginning and 33.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 171317.64 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 32.5 MB in the beginning and 42.2 MB in the end (delta: -9.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. * Witness Printer took 27.54 ms. Allocated memory is still 79.7 MB. Free memory was 42.2 MB in the beginning and 40.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 29]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.39843f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 171.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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, 19.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 26 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...