./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/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 1d97d268d682e2021ff98bdbb1deaf100696d038 .............................................................................................................................................................................................................................................................................. 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_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/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 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-a4ecdab [2020-11-22 13:05:45,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:05:45,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:05:45,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:05:45,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:05:45,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:05:45,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:05:45,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:05:45,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:05:45,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:05:45,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:05:45,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:05:45,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:05:45,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:05:45,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:05:45,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:05:45,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:05:45,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:05:45,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:05:45,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:05:45,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:05:45,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:05:45,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:05:45,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:05:45,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:05:45,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:05:45,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:05:45,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:05:45,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:05:45,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:05:45,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:05:45,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:05:45,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:05:45,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:05:45,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:05:45,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:05:45,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:05:45,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:05:45,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:05:45,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:05:45,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:05:45,294 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:05:45,329 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:05:45,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:05:45,336 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:05:45,336 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:05:45,336 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:05:45,336 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:05:45,337 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:05:45,337 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:05:45,337 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:05:45,337 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:05:45,338 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:05:45,339 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:05:45,339 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:05:45,339 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:05:45,339 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:05:45,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:05:45,340 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:05:45,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:05:45,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:05:45,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:05:45,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:05:45,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:05:45,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:05:45,342 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:05:45,342 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:05:45,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:05:45,342 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:05:45,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:05:45,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:05:45,343 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:05:45,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:05:45,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:05:45,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:05:45,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:05:45,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:05:45,345 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:05:45,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:05:45,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:05:45,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:05:45,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:05:45,346 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_1a0e65a6-1859-40ca-b2ac-d163b686ade7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-11-22 13:05:45,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:05:45,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:05:45,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:05:45,666 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:05:45,667 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:05:45,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-22 13:05:45,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/data/ca1fae878/840a1cfbc2d44ed4bf0643b7a3545743/FLAGbce28a36a [2020-11-22 13:05:46,236 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:05:46,237 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-22 13:05:46,243 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/data/ca1fae878/840a1cfbc2d44ed4bf0643b7a3545743/FLAGbce28a36a [2020-11-22 13:05:46,581 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/data/ca1fae878/840a1cfbc2d44ed4bf0643b7a3545743 [2020-11-22 13:05:46,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:05:46,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:05:46,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:05:46,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:05:46,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:05:46,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:05:46" (1/1) ... [2020-11-22 13:05:46,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5753feb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:46, skipping insertion in model container [2020-11-22 13:05:46,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:05:46" (1/1) ... [2020-11-22 13:05:46,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:05:46,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:05:46,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:05:46,818 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:05:46,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:05:46,858 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:05:46,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:46 WrapperNode [2020-11-22 13:05:46,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:05:46,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:05:46,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:05:46,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:05:46,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:46" (1/1) ... [2020-11-22 13:05:46,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:46" (1/1) ... [2020-11-22 13:05:46,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:05:46,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:05:46,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:05:46,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:05:46,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:46" (1/1) ... [2020-11-22 13:05:46,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:46" (1/1) ... [2020-11-22 13:05:46,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:46" (1/1) ... [2020-11-22 13:05:46,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:46" (1/1) ... [2020-11-22 13:05:46,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:46" (1/1) ... [2020-11-22 13:05:46,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:46" (1/1) ... [2020-11-22 13:05:46,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:46" (1/1) ... [2020-11-22 13:05:46,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:05:46,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:05:46,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:05:46,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:05:46,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/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 [2020-11-22 13:05:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:05:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:05:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-22 13:05:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 13:05:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-22 13:05:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:05:46,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:05:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 13:05:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:05:47,639 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:05:47,640 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-22 13:05:47,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:47 BoogieIcfgContainer [2020-11-22 13:05:47,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:05:47,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:05:47,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:05:47,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:05:47,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:05:46" (1/3) ... [2020-11-22 13:05:47,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43856b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:05:47, skipping insertion in model container [2020-11-22 13:05:47,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:46" (2/3) ... [2020-11-22 13:05:47,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43856b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:05:47, skipping insertion in model container [2020-11-22 13:05:47,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:47" (3/3) ... [2020-11-22 13:05:47,662 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-11-22 13:05:47,672 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:05:47,677 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:05:47,688 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:05:47,711 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:05:47,712 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:05:47,712 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:05:47,712 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:05:47,712 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:05:47,713 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:05:47,713 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:05:47,713 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:05:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-11-22 13:05:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:05:47,730 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:47,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:05:47,731 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:47,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:47,736 INFO L82 PathProgramCache]: Analyzing trace with hash 73710, now seen corresponding path program 1 times [2020-11-22 13:05:47,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:47,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450952700] [2020-11-22 13:05:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:05:47,949 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:05:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:05:48,012 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:05:48,041 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 13:05:48,042 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:05:48,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:05:48,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:05:48 BoogieIcfgContainer [2020-11-22 13:05:48,068 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:05:48,069 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:05:48,069 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:05:48,069 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:05:48,070 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:47" (3/4) ... [2020-11-22 13:05:48,073 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-22 13:05:48,073 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:05:48,075 INFO L168 Benchmark]: Toolchain (without parser) took 1489.07 ms. Allocated memory is still 121.6 MB. Free memory was 89.7 MB in the beginning and 82.9 MB in the end (delta: 6.8 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:48,076 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 79.7 MB. Free memory is still 37.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:48,077 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.45 ms. Allocated memory is still 121.6 MB. Free memory was 89.7 MB in the beginning and 96.7 MB in the end (delta: -7.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:48,078 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.17 ms. Allocated memory is still 121.6 MB. Free memory was 96.7 MB in the beginning and 94.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:48,079 INFO L168 Benchmark]: Boogie Preprocessor took 25.32 ms. Allocated memory is still 121.6 MB. Free memory was 94.8 MB in the beginning and 93.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:48,080 INFO L168 Benchmark]: RCFGBuilder took 721.47 ms. Allocated memory is still 121.6 MB. Free memory was 93.7 MB in the beginning and 57.1 MB in the end (delta: 36.6 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:48,081 INFO L168 Benchmark]: TraceAbstraction took 424.24 ms. Allocated memory is still 121.6 MB. Free memory was 56.9 MB in the beginning and 83.5 MB in the end (delta: -26.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:48,081 INFO L168 Benchmark]: Witness Printer took 4.54 ms. Allocated memory is still 121.6 MB. Free memory is still 82.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:48,086 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 79.7 MB. Free memory is still 37.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 272.45 ms. Allocated memory is still 121.6 MB. Free memory was 89.7 MB in the beginning and 96.7 MB in the end (delta: -7.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.17 ms. Allocated memory is still 121.6 MB. Free memory was 96.7 MB in the beginning and 94.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.32 ms. Allocated memory is still 121.6 MB. Free memory was 94.8 MB in the beginning and 93.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 721.47 ms. Allocated memory is still 121.6 MB. Free memory was 93.7 MB in the beginning and 57.1 MB in the end (delta: 36.6 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 424.24 ms. Allocated memory is still 121.6 MB. Free memory was 56.9 MB in the beginning and 83.5 MB in the end (delta: -26.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.54 ms. Allocated memory is still 121.6 MB. Free memory is still 82.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() 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 FALSE !(exp % 2 == 0) [L47] r = r * C0 [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] [L3] __assert_fail("0", "sqrt_poly2.c", 3, "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: 0.3s, 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, 0.1s 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-a4ecdab [2020-11-22 13:05:50,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:05:50,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:05:50,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:05:50,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:05:50,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:05:50,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:05:50,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:05:50,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:05:50,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:05:50,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:05:50,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:05:50,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:05:50,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:05:50,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:05:50,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:05:50,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:05:50,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:05:50,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:05:50,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:05:50,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:05:50,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:05:50,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:05:50,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:05:50,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:05:50,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:05:50,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:05:50,567 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:05:50,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:05:50,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:05:50,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:05:50,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:05:50,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:05:50,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:05:50,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:05:50,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:05:50,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:05:50,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:05:50,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:05:50,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:05:50,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:05:50,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-22 13:05:50,614 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:05:50,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:05:50,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:05:50,616 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:05:50,616 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:05:50,616 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:05:50,616 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:05:50,617 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:05:50,617 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:05:50,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:05:50,618 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:05:50,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:05:50,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:05:50,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:05:50,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:05:50,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:05:50,619 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:05:50,619 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-22 13:05:50,620 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-22 13:05:50,620 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:05:50,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:05:50,620 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:05:50,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:05:50,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:05:50,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-22 13:05:50,621 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:05:50,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:05:50,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:05:50,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:05:50,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:05:50,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:05:50,623 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-22 13:05:50,623 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-22 13:05:50,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:05:50,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:05:50,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:05:50,624 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_1a0e65a6-1859-40ca-b2ac-d163b686ade7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-11-22 13:05:50,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:05:51,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:05:51,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:05:51,026 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:05:51,026 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:05:51,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-22 13:05:51,094 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/data/a0b11dfc1/88457b57bbc04f4a98f1d99a7cecd870/FLAG8163f5ffe [2020-11-22 13:05:51,561 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:05:51,562 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-22 13:05:51,577 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/data/a0b11dfc1/88457b57bbc04f4a98f1d99a7cecd870/FLAG8163f5ffe [2020-11-22 13:05:51,904 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/data/a0b11dfc1/88457b57bbc04f4a98f1d99a7cecd870 [2020-11-22 13:05:51,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:05:51,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:05:51,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:05:51,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:05:51,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:05:51,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:05:51" (1/1) ... [2020-11-22 13:05:51,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58205cbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:51, skipping insertion in model container [2020-11-22 13:05:51,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:05:51" (1/1) ... [2020-11-22 13:05:51,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:05:51,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:05:52,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:05:52,117 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:05:52,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:05:52,163 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:05:52,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:52 WrapperNode [2020-11-22 13:05:52,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:05:52,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:05:52,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:05:52,165 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:05:52,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:52" (1/1) ... [2020-11-22 13:05:52,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:52" (1/1) ... [2020-11-22 13:05:52,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:05:52,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:05:52,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:05:52,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:05:52,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:52" (1/1) ... [2020-11-22 13:05:52,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:52" (1/1) ... [2020-11-22 13:05:52,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:52" (1/1) ... [2020-11-22 13:05:52,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:52" (1/1) ... [2020-11-22 13:05:52,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:52" (1/1) ... [2020-11-22 13:05:52,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:52" (1/1) ... [2020-11-22 13:05:52,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:52" (1/1) ... [2020-11-22 13:05:52,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:05:52,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:05:52,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:05:52,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:05:52,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/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 [2020-11-22 13:05:52,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-11-22 13:05:52,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-11-22 13:05:52,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-22 13:05:52,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:05:52,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-22 13:05:52,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:05:52,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:05:52,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:05:52,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-11-22 13:05:55,503 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:05:55,503 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-22 13:05:55,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:55 BoogieIcfgContainer [2020-11-22 13:05:55,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:05:55,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:05:55,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:05:55,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:05:55,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:05:51" (1/3) ... [2020-11-22 13:05:55,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5cd23b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:05:55, skipping insertion in model container [2020-11-22 13:05:55,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:52" (2/3) ... [2020-11-22 13:05:55,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5cd23b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:05:55, skipping insertion in model container [2020-11-22 13:05:55,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:55" (3/3) ... [2020-11-22 13:05:55,528 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-11-22 13:05:55,542 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:05:55,547 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:05:55,559 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:05:55,582 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:05:55,582 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:05:55,582 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:05:55,582 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:05:55,582 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:05:55,583 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:05:55,583 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:05:55,583 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:05:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-22 13:05:55,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:05:55,599 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:55,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:55,600 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:55,605 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-11-22 13:05:55,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:05:55,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933987955] [2020-11-22 13:05:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/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 [2020-11-22 13:05:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:56,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-22 13:05:56,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:05:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:56,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:05:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:56,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933987955] [2020-11-22 13:05:56,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:56,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-22 13:05:56,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060360423] [2020-11-22 13:05:56,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:05:56,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:05:56,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:05:56,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:05:57,000 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-11-22 13:05:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:57,014 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-22 13:05:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:05:57,016 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-22 13:05:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:57,029 INFO L225 Difference]: With dead ends: 26 [2020-11-22 13:05:57,032 INFO L226 Difference]: Without dead ends: 10 [2020-11-22 13:05:57,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:05:57,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-22 13:05:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-22 13:05:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-22 13:05:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-22 13:05:57,071 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-11-22 13:05:57,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:57,071 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-22 13:05:57,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:05:57,072 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-22 13:05:57,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:05:57,072 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:57,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:05:57,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-22 13:05:57,291 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:05:57,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:57,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-11-22 13:05:57,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:05:57,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277072672] [2020-11-22 13:05:57,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/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 [2020-11-22 13:05:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:05:58,891 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:06:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:06:00,556 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:06:00,700 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-22 13:06:00,700 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:06:00,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-22 13:06:00,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:06:00 BoogieIcfgContainer [2020-11-22 13:06:00,941 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:06:00,941 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:06:00,942 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:06:00,942 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:06:00,942 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:55" (3/4) ... [2020-11-22 13:06:00,944 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:06:00,999 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1a0e65a6-1859-40ca-b2ac-d163b686ade7/bin/utaipan/witness.graphml [2020-11-22 13:06:01,000 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:06:01,001 INFO L168 Benchmark]: Toolchain (without parser) took 9093.67 ms. Allocated memory was 65.0 MB in the beginning and 94.4 MB in the end (delta: 29.4 MB). Free memory was 45.9 MB in the beginning and 56.8 MB in the end (delta: -10.9 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:01,002 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 65.0 MB. Free memory was 46.2 MB in the beginning and 46.2 MB in the end (delta: 32.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:01,003 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.59 ms. Allocated memory is still 65.0 MB. Free memory was 45.7 MB in the beginning and 34.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:01,003 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.43 ms. Allocated memory is still 65.0 MB. Free memory was 34.3 MB in the beginning and 48.3 MB in the end (delta: -13.9 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:01,004 INFO L168 Benchmark]: Boogie Preprocessor took 31.48 ms. Allocated memory is still 65.0 MB. Free memory was 48.3 MB in the beginning and 46.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:01,004 INFO L168 Benchmark]: RCFGBuilder took 3253.12 ms. Allocated memory is still 65.0 MB. Free memory was 46.7 MB in the beginning and 31.0 MB in the end (delta: 15.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:01,005 INFO L168 Benchmark]: TraceAbstraction took 5434.86 ms. Allocated memory was 65.0 MB in the beginning and 94.4 MB in the end (delta: 29.4 MB). Free memory was 30.6 MB in the beginning and 59.5 MB in the end (delta: -28.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:01,006 INFO L168 Benchmark]: Witness Printer took 58.20 ms. Allocated memory is still 94.4 MB. Free memory was 59.5 MB in the beginning and 56.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:01,009 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 65.0 MB. Free memory was 46.2 MB in the beginning and 46.2 MB in the end (delta: 32.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 255.59 ms. Allocated memory is still 65.0 MB. Free memory was 45.7 MB in the beginning and 34.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.43 ms. Allocated memory is still 65.0 MB. Free memory was 34.3 MB in the beginning and 48.3 MB in the end (delta: -13.9 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.48 ms. Allocated memory is still 65.0 MB. Free memory was 48.3 MB in the beginning and 46.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3253.12 ms. Allocated memory is still 65.0 MB. Free memory was 46.7 MB in the beginning and 31.0 MB in the end (delta: 15.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5434.86 ms. Allocated memory was 65.0 MB in the beginning and 94.4 MB in the end (delta: 29.4 MB). Free memory was 30.6 MB in the beginning and 59.5 MB in the end (delta: -28.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 16.1 GB. * Witness Printer took 58.20 ms. Allocated memory is still 94.4 MB. Free memory was 59.5 MB in the beginning and 56.8 MB in the end (delta: 2.7 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: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] [L3] __assert_fail("0", "sqrt_poly2.c", 3, "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, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, 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, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 128 SizeOfPredicates, 0 NumberOfNonLiveVariables, 58 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...