./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 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P --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 14164d07a16e34a605f7e42a9694dd7b1f0302594742e37b160cf821b53bc94e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:49:46,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:49:46,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:49:46,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:49:46,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:49:46,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:49:46,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:49:46,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:49:46,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:49:46,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:49:46,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:49:46,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:49:46,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:49:46,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:49:46,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:49:46,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:49:46,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:49:46,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:49:46,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:49:46,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:49:46,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:49:46,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:49:46,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:49:46,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:49:46,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:49:46,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:49:46,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:49:46,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:49:46,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:49:46,804 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:49:46,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:49:46,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:49:46,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:49:46,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:49:46,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:49:46,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:49:46,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:49:46,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:49:46,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:49:46,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:49:46,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:49:46,816 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:49:46,868 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:49:46,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:49:46,868 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:49:46,869 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:49:46,869 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:49:46,869 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:49:46,870 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:49:46,870 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:49:46,870 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:49:46,870 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:49:46,870 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:49:46,871 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:49:46,871 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:49:46,871 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:49:46,871 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:49:46,871 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:49:46,872 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:49:46,872 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:49:46,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:49:46,873 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:49:46,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:49:46,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:49:46,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:49:46,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:49:46,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:49:46,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:49:46,890 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:49:46,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:49:46,890 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:49:46,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:49:46,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:49:46,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:49:46,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:49:46,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:49:46,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:49:46,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:49:46,892 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:49:46,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:49:46,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:49:46,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:49:46,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:49:46,893 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14164d07a16e34a605f7e42a9694dd7b1f0302594742e37b160cf821b53bc94e [2021-11-20 23:49:47,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:49:47,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:49:47,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:49:47,164 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:49:47,165 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:49:47,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-11-20 23:49:47,227 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/data/730b871a8/faaa179d3e564f83925b82da39924d2b/FLAG76e7797e1 [2021-11-20 23:49:47,693 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:49:47,694 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-11-20 23:49:47,706 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/data/730b871a8/faaa179d3e564f83925b82da39924d2b/FLAG76e7797e1 [2021-11-20 23:49:48,065 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/data/730b871a8/faaa179d3e564f83925b82da39924d2b [2021-11-20 23:49:48,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:49:48,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:49:48,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:49:48,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:49:48,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:49:48,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:49:48" (1/1) ... [2021-11-20 23:49:48,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60541141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:48, skipping insertion in model container [2021-11-20 23:49:48,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:49:48" (1/1) ... [2021-11-20 23:49:48,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:49:48,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:49:48,344 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/sv-benchmarks/c/float-benchs/sqrt_poly2.c[587,600] [2021-11-20 23:49:48,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:49:48,398 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:49:48,418 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/sv-benchmarks/c/float-benchs/sqrt_poly2.c[587,600] [2021-11-20 23:49:48,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:49:48,470 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:49:48,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:48 WrapperNode [2021-11-20 23:49:48,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:49:48,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:49:48,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:49:48,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:49:48,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:48" (1/1) ... [2021-11-20 23:49:48,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:48" (1/1) ... [2021-11-20 23:49:48,530 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2021-11-20 23:49:48,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:49:48,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:49:48,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:49:48,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:49:48,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:48" (1/1) ... [2021-11-20 23:49:48,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:48" (1/1) ... [2021-11-20 23:49:48,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:48" (1/1) ... [2021-11-20 23:49:48,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:48" (1/1) ... [2021-11-20 23:49:48,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:48" (1/1) ... [2021-11-20 23:49:48,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:48" (1/1) ... [2021-11-20 23:49:48,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:48" (1/1) ... [2021-11-20 23:49:48,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:49:48,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:49:48,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:49:48,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:49:48,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:48" (1/1) ... [2021-11-20 23:49:48,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:49:48,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:49:48,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:49:48,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:49:48,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:49:48,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:49:48,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:49:48,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-20 23:49:48,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:49:48,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-20 23:49:48,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:49:48,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:49:48,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:49:48,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:49:48,720 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:49:48,722 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:49:48,867 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:49:48,956 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:49:48,957 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 23:49:48,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:49:48 BoogieIcfgContainer [2021-11-20 23:49:48,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:49:48,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:49:48,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:49:48,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:49:48,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:49:48" (1/3) ... [2021-11-20 23:49:48,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e5e7ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:49:48, skipping insertion in model container [2021-11-20 23:49:48,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:48" (2/3) ... [2021-11-20 23:49:48,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e5e7ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:49:48, skipping insertion in model container [2021-11-20 23:49:48,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:49:48" (3/3) ... [2021-11-20 23:49:48,968 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2021-11-20 23:49:48,974 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:49:48,974 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:49:49,048 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:49:49,055 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:49:49,060 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:49:49,093 INFO L276 IsEmpty]: Start isEmpty. Operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:49:49,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-20 23:49:49,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:49:49,102 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-20 23:49:49,103 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:49:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:49:49,123 INFO L85 PathProgramCache]: Analyzing trace with hash 70827, now seen corresponding path program 1 times [2021-11-20 23:49:49,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:49:49,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395639696] [2021-11-20 23:49:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:49:49,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:49:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:49:49,319 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 23:49:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:49:49,402 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-20 23:49:49,404 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 23:49:49,405 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 23:49:49,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:49:49,412 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-20 23:49:49,417 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:49:49,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:49:49 BoogieIcfgContainer [2021-11-20 23:49:49,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:49:49,440 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:49:49,440 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:49:49,440 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:49:49,441 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:49:48" (3/4) ... [2021-11-20 23:49:49,444 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 23:49:49,444 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:49:49,445 INFO L158 Benchmark]: Toolchain (without parser) took 1373.03ms. Allocated memory is still 107.0MB. Free memory was 63.9MB in the beginning and 46.8MB in the end (delta: 17.1MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. [2021-11-20 23:49:49,446 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 107.0MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:49:49,446 INFO L158 Benchmark]: CACSL2BoogieTranslator took 396.52ms. Allocated memory is still 107.0MB. Free memory was 63.7MB in the beginning and 81.3MB in the end (delta: -17.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 23:49:49,447 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.43ms. Allocated memory is still 107.0MB. Free memory was 81.3MB in the beginning and 79.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:49:49,448 INFO L158 Benchmark]: Boogie Preprocessor took 38.24ms. Allocated memory is still 107.0MB. Free memory was 79.7MB in the beginning and 78.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:49:49,448 INFO L158 Benchmark]: RCFGBuilder took 387.01ms. Allocated memory is still 107.0MB. Free memory was 78.2MB in the beginning and 63.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-20 23:49:49,449 INFO L158 Benchmark]: TraceAbstraction took 477.72ms. Allocated memory is still 107.0MB. Free memory was 62.6MB in the beginning and 47.4MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-20 23:49:49,449 INFO L158 Benchmark]: Witness Printer took 4.17ms. Allocated memory is still 107.0MB. Free memory was 47.1MB in the beginning and 46.8MB in the end (delta: 273.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:49:49,453 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 107.0MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 396.52ms. Allocated memory is still 107.0MB. Free memory was 63.7MB in the beginning and 81.3MB in the end (delta: -17.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.43ms. Allocated memory is still 107.0MB. Free memory was 81.3MB in the beginning and 79.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 38.24ms. Allocated memory is still 107.0MB. Free memory was 79.7MB in the beginning and 78.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 387.01ms. Allocated memory is still 107.0MB. Free memory was 78.2MB in the beginning and 63.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 477.72ms. Allocated memory is still 107.0MB. Free memory was 62.6MB in the beginning and 47.4MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 4.17ms. Allocated memory is still 107.0MB. Free memory was 47.1MB in the beginning and 46.8MB in the end (delta: 273.0kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 38, overapproximation of someUnaryDOUBLEoperation at line 20, overapproximation of someBinaryArithmeticDOUBLEoperation at line 39, overapproximation of bitwiseAnd at line 37, overapproximation of someBinaryDOUBLEComparisonOperation at line 61. Possible FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L61] CALL assume_abort_if_not(x >= 1. && x <= 1e10) [L12] COND FALSE !(!cond) [L61] RET assume_abort_if_not(x >= 1. && x <= 1e10) [L63] CALL, EXPR sqrt_custom(x) [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] RET, EXPR sqrt_custom(x) [L63] y = sqrt_custom(x) [L65] CALL __VERIFIER_assert(y >= 0. && y <= 1e6) [L14] COND TRUE !(cond) VAL [\old(cond)=0, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, cond=0] [L14] reach_error() VAL [\old(cond)=0, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, InterpolantAutomatonStates: 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 [2021-11-20 23:49:49,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P --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 14164d07a16e34a605f7e42a9694dd7b1f0302594742e37b160cf821b53bc94e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:49:51,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:49:51,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:49:51,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:49:51,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:49:51,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:49:51,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:49:51,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:49:51,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:49:51,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:49:51,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:49:51,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:49:51,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:49:51,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:49:51,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:49:51,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:49:51,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:49:51,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:49:51,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:49:51,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:49:51,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:49:51,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:49:51,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:49:51,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:49:51,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:49:51,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:49:51,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:49:51,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:49:51,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:49:51,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:49:51,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:49:51,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:49:51,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:49:51,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:49:51,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:49:51,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:49:51,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:49:51,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:49:51,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:49:51,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:49:51,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:49:51,961 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-20 23:49:51,987 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:49:51,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:49:51,988 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:49:51,988 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:49:51,989 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:49:51,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:49:51,989 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:49:51,989 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:49:51,989 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:49:51,990 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:49:51,990 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:49:51,990 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:49:51,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:49:51,991 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:49:51,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:49:51,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:49:51,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:49:51,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:49:51,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:49:51,992 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 23:49:51,992 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 23:49:51,992 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:49:51,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:49:51,993 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:49:51,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:49:51,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:49:51,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 23:49:51,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:49:51,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:49:51,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:49:51,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:49:51,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:49:51,995 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 23:49:51,995 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 23:49:51,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:49:51,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:49:51,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:49:51,996 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14164d07a16e34a605f7e42a9694dd7b1f0302594742e37b160cf821b53bc94e [2021-11-20 23:49:52,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:49:52,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:49:52,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:49:52,364 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:49:52,365 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:49:52,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-11-20 23:49:52,439 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/data/bf1189d7a/4479b79ac6e7401190d13f2afd411744/FLAG3ea9dbff7 [2021-11-20 23:49:52,914 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:49:52,923 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2021-11-20 23:49:52,929 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/data/bf1189d7a/4479b79ac6e7401190d13f2afd411744/FLAG3ea9dbff7 [2021-11-20 23:49:53,288 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/data/bf1189d7a/4479b79ac6e7401190d13f2afd411744 [2021-11-20 23:49:53,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:49:53,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:49:53,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:49:53,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:49:53,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:49:53,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:49:53" (1/1) ... [2021-11-20 23:49:53,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58485b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:53, skipping insertion in model container [2021-11-20 23:49:53,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:49:53" (1/1) ... [2021-11-20 23:49:53,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:49:53,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:49:53,468 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/sv-benchmarks/c/float-benchs/sqrt_poly2.c[587,600] [2021-11-20 23:49:53,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:49:53,501 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:49:53,514 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/sv-benchmarks/c/float-benchs/sqrt_poly2.c[587,600] [2021-11-20 23:49:53,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:49:53,588 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:49:53,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:53 WrapperNode [2021-11-20 23:49:53,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:49:53,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:49:53,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:49:53,602 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:49:53,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:53" (1/1) ... [2021-11-20 23:49:53,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:53" (1/1) ... [2021-11-20 23:49:53,654 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2021-11-20 23:49:53,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:49:53,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:49:53,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:49:53,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:49:53,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:53" (1/1) ... [2021-11-20 23:49:53,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:53" (1/1) ... [2021-11-20 23:49:53,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:53" (1/1) ... [2021-11-20 23:49:53,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:53" (1/1) ... [2021-11-20 23:49:53,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:53" (1/1) ... [2021-11-20 23:49:53,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:53" (1/1) ... [2021-11-20 23:49:53,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:53" (1/1) ... [2021-11-20 23:49:53,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:49:53,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:49:53,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:49:53,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:49:53,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:53" (1/1) ... [2021-11-20 23:49:53,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:49:53,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:49:53,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:49:53,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:49:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:49:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-11-20 23:49:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-11-20 23:49:53,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 23:49:53,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:49:53,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 23:49:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:49:53,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:49:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:49:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 23:49:53,859 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:49:53,861 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:49:56,456 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:49:56,462 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:49:56,462 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 23:49:56,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:49:56 BoogieIcfgContainer [2021-11-20 23:49:56,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:49:56,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:49:56,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:49:56,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:49:56,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:49:53" (1/3) ... [2021-11-20 23:49:56,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c4d615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:49:56, skipping insertion in model container [2021-11-20 23:49:56,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:49:53" (2/3) ... [2021-11-20 23:49:56,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c4d615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:49:56, skipping insertion in model container [2021-11-20 23:49:56,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:49:56" (3/3) ... [2021-11-20 23:49:56,472 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2021-11-20 23:49:56,477 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:49:56,477 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:49:56,522 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:49:56,529 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:49:56,530 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:49:56,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:49:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 23:49:56,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:49:56,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:49:56,550 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:49:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:49:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2021-11-20 23:49:56,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:49:56,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917885305] [2021-11-20 23:49:56,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:49:56,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:49:56,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:49:56,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:49:56,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 23:49:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:49:57,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 23:49:57,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:49:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:49:57,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:49:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:49:58,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 23:49:58,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917885305] [2021-11-20 23:49:58,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917885305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 23:49:58,042 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:49:58,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 23:49:58,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771036214] [2021-11-20 23:49:58,045 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 23:49:58,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:49:58,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 23:49:58,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:49:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:49:58,097 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:49:58,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:49:58,110 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-20 23:49:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:49:58,112 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 23:49:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:49:58,119 INFO L225 Difference]: With dead ends: 25 [2021-11-20 23:49:58,120 INFO L226 Difference]: Without dead ends: 10 [2021-11-20 23:49:58,124 INFO L932 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 [2021-11-20 23:49:58,130 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:49:58,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:49:58,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-20 23:49:58,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-20 23:49:58,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:49:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-20 23:49:58,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2021-11-20 23:49:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:49:58,166 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-20 23:49:58,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:49:58,166 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-20 23:49:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 23:49:58,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:49:58,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:49:58,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:49:58,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:49:58,378 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:49:58,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:49:58,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2021-11-20 23:49:58,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 23:49:58,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953145747] [2021-11-20 23:49:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:49:58,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 23:49:58,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 23:49:58,394 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 23:49:58,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 23:49:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:49:59,739 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 23:50:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:50:01,138 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-20 23:50:01,139 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 23:50:01,141 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 23:50:01,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:50:01,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 23:50:01,347 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-20 23:50:01,349 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:50:01,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:50:01 BoogieIcfgContainer [2021-11-20 23:50:01,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:50:01,393 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:50:01,393 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:50:01,393 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:50:01,394 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:49:56" (3/4) ... [2021-11-20 23:50:01,396 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 23:50:01,448 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-20 23:50:01,448 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:50:01,449 INFO L158 Benchmark]: Toolchain (without parser) took 8154.85ms. Allocated memory is still 79.7MB. Free memory was 62.9MB in the beginning and 43.3MB in the end (delta: 19.5MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2021-11-20 23:50:01,449 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 79.7MB. Free memory is still 59.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:50:01,450 INFO L158 Benchmark]: CACSL2BoogieTranslator took 295.25ms. Allocated memory is still 79.7MB. Free memory was 62.7MB in the beginning and 62.3MB in the end (delta: 372.5kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 23:50:01,450 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.36ms. Allocated memory is still 79.7MB. Free memory was 62.1MB in the beginning and 60.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:50:01,451 INFO L158 Benchmark]: Boogie Preprocessor took 30.14ms. Allocated memory is still 79.7MB. Free memory was 60.5MB in the beginning and 59.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:50:01,451 INFO L158 Benchmark]: RCFGBuilder took 2778.32ms. Allocated memory is still 79.7MB. Free memory was 59.0MB in the beginning and 48.2MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 23:50:01,452 INFO L158 Benchmark]: TraceAbstraction took 4926.10ms. Allocated memory is still 79.7MB. Free memory was 47.6MB in the beginning and 45.9MB in the end (delta: 1.8MB). Peak memory consumption was 3.8MB. Max. memory is 16.1GB. [2021-11-20 23:50:01,452 INFO L158 Benchmark]: Witness Printer took 55.50ms. Allocated memory is still 79.7MB. Free memory was 45.9MB in the beginning and 43.3MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 23:50:01,454 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 79.7MB. Free memory is still 59.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 295.25ms. Allocated memory is still 79.7MB. Free memory was 62.7MB in the beginning and 62.3MB in the end (delta: 372.5kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.36ms. Allocated memory is still 79.7MB. Free memory was 62.1MB in the beginning and 60.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.14ms. Allocated memory is still 79.7MB. Free memory was 60.5MB in the beginning and 59.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 2778.32ms. Allocated memory is still 79.7MB. Free memory was 59.0MB in the beginning and 48.2MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4926.10ms. Allocated memory is still 79.7MB. Free memory was 47.6MB in the beginning and 45.9MB in the end (delta: 1.8MB). Peak memory consumption was 3.8MB. Max. memory is 16.1GB. * Witness Printer took 55.50ms. Allocated memory is still 79.7MB. Free memory was 45.9MB in the beginning and 43.3MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L61] CALL assume_abort_if_not(x >= 1. && x <= 1e10) [L12] COND FALSE !(!cond) VAL [\old(cond)=1, C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666, cond=1] [L61] RET assume_abort_if_not(x >= 1. && x <= 1e10) [L63] CALL, EXPR sqrt_custom(x) [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 [\old(a)=8589934592, a=8589934592, C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666, exp=0, r=-9424883247839044000000000000, x={7:0}] [L43] COND TRUE exp % 2 == 0 [L44] exp++ VAL [\old(a)=8589934592, a=8589934592, C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666, exp=1, r=-9424883247839044000000000000, x={7:0}] [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] r = r * x.d [L53] return r; [L53] return r; VAL [\old(a)=8589934592, \result=-80959140268404600000000000000000000000, a=8589934592, C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666, exp=1, r=-80959140268404600000000000000000000000] [L63] RET, EXPR sqrt_custom(x) [L63] y = sqrt_custom(x) [L65] CALL __VERIFIER_assert(y >= 0. && y <= 1e6) [L14] COND TRUE !(cond) VAL [\old(cond)=0, C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666, cond=0] [L14] reach_error() VAL [\old(cond)=0, C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.8s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 14 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, 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=14occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 48 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! [2021-11-20 23:50:01,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162efe5e-0e1d-48ed-969e-fcc2167f7728/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE