./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_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/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_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/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 [2020-11-28 07:41:30,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:41:30,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:41:30,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:41:30,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:41:30,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:41:30,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:41:30,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:41:30,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:41:30,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:41:30,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:41:30,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:41:30,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:41:30,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:41:30,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:41:30,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:41:30,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:41:30,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:41:30,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:41:30,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:41:30,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:41:30,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:41:30,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:41:30,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:41:30,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:41:30,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:41:30,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:41:30,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:41:30,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:41:30,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:41:30,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:41:30,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:41:30,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:41:30,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:41:30,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:41:30,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:41:30,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:41:30,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:41:30,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:41:30,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:41:30,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:41:30,312 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:41:30,344 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:41:30,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:41:30,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:41:30,348 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:41:30,348 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:41:30,348 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:41:30,349 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:41:30,349 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:41:30,349 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:41:30,349 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:41:30,350 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:41:30,351 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:41:30,351 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:41:30,351 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:41:30,352 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:41:30,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:41:30,353 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:41:30,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:41:30,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:41:30,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:41:30,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:41:30,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:41:30,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:41:30,354 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:41:30,354 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:41:30,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:41:30,355 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:41:30,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:41:30,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:41:30,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:41:30,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:41:30,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:41:30,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:41:30,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:41:30,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:41:30,359 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:41:30,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:41:30,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:41:30,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:41:30,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:41:30,360 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_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-11-28 07:41:30,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:41:30,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:41:30,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:41:30,686 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:41:30,686 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:41:30,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-28 07:41:30,764 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/data/1d8280563/a2b0a128bb144ce688901cc958fc88d5/FLAG8e1c2ad7c [2020-11-28 07:41:31,216 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:41:31,216 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-28 07:41:31,223 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/data/1d8280563/a2b0a128bb144ce688901cc958fc88d5/FLAG8e1c2ad7c [2020-11-28 07:41:31,630 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/data/1d8280563/a2b0a128bb144ce688901cc958fc88d5 [2020-11-28 07:41:31,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:41:31,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:41:31,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:31,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:41:31,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:41:31,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:31,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e431f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31, skipping insertion in model container [2020-11-28 07:41:31,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:31,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:41:31,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:41:31,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:31,909 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:41:31,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:31,989 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:41:31,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31 WrapperNode [2020-11-28 07:41:31,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:31,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:31,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:41:31,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:41:32,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:32,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:32,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:32,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:41:32,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:41:32,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:41:32,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:32,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:32,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:32,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:32,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:32,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:32,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... [2020-11-28 07:41:32,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:41:32,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:41:32,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:41:32,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:41:32,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/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 [2020-11-28 07:41:32,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:41:32,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:41:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-28 07:41:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:41:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-28 07:41:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:41:32,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:41:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:41:32,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:41:32,800 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:41:32,800 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 07:41:32,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:32 BoogieIcfgContainer [2020-11-28 07:41:32,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:41:32,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:41:32,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:41:32,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:41:32,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:41:31" (1/3) ... [2020-11-28 07:41:32,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634693c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:32, skipping insertion in model container [2020-11-28 07:41:32,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:31" (2/3) ... [2020-11-28 07:41:32,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634693c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:32, skipping insertion in model container [2020-11-28 07:41:32,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:32" (3/3) ... [2020-11-28 07:41:32,811 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-11-28 07:41:32,823 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:41:32,828 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:41:32,840 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:41:32,864 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:41:32,864 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:41:32,864 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:41:32,865 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:41:32,865 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:41:32,865 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:41:32,865 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:41:32,865 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:41:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-11-28 07:41:32,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:41:32,881 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:32,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:41:32,882 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:32,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:32,887 INFO L82 PathProgramCache]: Analyzing trace with hash 73710, now seen corresponding path program 1 times [2020-11-28 07:41:32,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:32,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992017149] [2020-11-28 07:41:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:41:33,035 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:41:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:41:33,080 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:41:33,105 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:41:33,106 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:41:33,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:41:33,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:41:33 BoogieIcfgContainer [2020-11-28 07:41:33,138 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:41:33,139 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:41:33,139 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:41:33,139 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:41:33,140 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:32" (3/4) ... [2020-11-28 07:41:33,143 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 07:41:33,143 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:41:33,146 INFO L168 Benchmark]: Toolchain (without parser) took 1509.75 ms. Allocated memory was 94.4 MB in the beginning and 115.3 MB in the end (delta: 21.0 MB). Free memory was 56.8 MB in the beginning and 91.3 MB in the end (delta: -34.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:33,146 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 94.4 MB. Free memory is still 73.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:33,147 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.88 ms. Allocated memory is still 94.4 MB. Free memory was 56.6 MB in the beginning and 69.5 MB in the end (delta: -12.9 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:33,148 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.27 ms. Allocated memory is still 94.4 MB. Free memory was 69.4 MB in the beginning and 67.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:33,149 INFO L168 Benchmark]: Boogie Preprocessor took 29.78 ms. Allocated memory is still 94.4 MB. Free memory was 67.8 MB in the beginning and 66.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:33,157 INFO L168 Benchmark]: RCFGBuilder took 721.14 ms. Allocated memory was 94.4 MB in the beginning and 115.3 MB in the end (delta: 21.0 MB). Free memory was 66.4 MB in the beginning and 76.4 MB in the end (delta: -10.0 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:33,158 INFO L168 Benchmark]: TraceAbstraction took 333.67 ms. Allocated memory is still 115.3 MB. Free memory was 76.0 MB in the beginning and 91.3 MB in the end (delta: -15.3 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:33,158 INFO L168 Benchmark]: Witness Printer took 4.65 ms. Allocated memory is still 115.3 MB. Free memory is still 91.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:33,162 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 94.4 MB. Free memory is still 73.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 354.88 ms. Allocated memory is still 94.4 MB. Free memory was 56.6 MB in the beginning and 69.5 MB in the end (delta: -12.9 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.27 ms. Allocated memory is still 94.4 MB. Free memory was 69.4 MB in the beginning and 67.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.78 ms. Allocated memory is still 94.4 MB. Free memory was 67.8 MB in the beginning and 66.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 721.14 ms. Allocated memory was 94.4 MB in the beginning and 115.3 MB in the end (delta: 21.0 MB). Free memory was 66.4 MB in the beginning and 76.4 MB in the end (delta: -10.0 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 333.67 ms. Allocated memory is still 115.3 MB. Free memory was 76.0 MB in the beginning and 91.3 MB in the end (delta: -15.3 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.65 ms. Allocated memory is still 115.3 MB. Free memory is still 91.3 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: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:41:35,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:41:35,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:41:35,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:41:35,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:41:35,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:41:35,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:41:35,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:41:35,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:41:35,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:41:35,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:41:35,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:41:35,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:41:35,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:41:35,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:41:35,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:41:35,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:41:35,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:41:35,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:41:35,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:41:35,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:41:35,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:41:35,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:41:35,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:41:35,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:41:35,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:41:35,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:41:35,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:41:35,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:41:35,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:41:35,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:41:35,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:41:35,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:41:35,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:41:35,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:41:35,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:41:35,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:41:35,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:41:35,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:41:35,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:41:35,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:41:35,975 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-28 07:41:36,022 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:41:36,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:41:36,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:41:36,025 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:41:36,026 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:41:36,026 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:41:36,026 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:41:36,026 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:41:36,027 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:41:36,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:41:36,029 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:41:36,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:41:36,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:41:36,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:41:36,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:41:36,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:41:36,031 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:41:36,031 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-28 07:41:36,031 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-28 07:41:36,032 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:41:36,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:41:36,032 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:41:36,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:41:36,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:41:36,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 07:41:36,033 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:41:36,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:41:36,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:41:36,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:41:36,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:41:36,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:41:36,035 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-28 07:41:36,035 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-28 07:41:36,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:41:36,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:41:36,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:41:36,036 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_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-11-28 07:41:36,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:41:36,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:41:36,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:41:36,507 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:41:36,509 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:41:36,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-28 07:41:36,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/data/bae6783e7/52c7b4dc016048beb8c08754c12572f7/FLAG3902649fa [2020-11-28 07:41:37,189 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:41:37,190 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-28 07:41:37,200 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/data/bae6783e7/52c7b4dc016048beb8c08754c12572f7/FLAG3902649fa [2020-11-28 07:41:37,500 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/data/bae6783e7/52c7b4dc016048beb8c08754c12572f7 [2020-11-28 07:41:37,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:41:37,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:41:37,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:37,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:41:37,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:41:37,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:37" (1/1) ... [2020-11-28 07:41:37,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@94509c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:37, skipping insertion in model container [2020-11-28 07:41:37,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:37" (1/1) ... [2020-11-28 07:41:37,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:41:37,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:41:37,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:37,770 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:41:37,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:37,869 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:41:37,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:37 WrapperNode [2020-11-28 07:41:37,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:37,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:37,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:41:37,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:41:37,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:37" (1/1) ... [2020-11-28 07:41:37,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:37" (1/1) ... [2020-11-28 07:41:37,989 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:37,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:41:37,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:41:37,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:41:38,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:37" (1/1) ... [2020-11-28 07:41:38,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:37" (1/1) ... [2020-11-28 07:41:38,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:37" (1/1) ... [2020-11-28 07:41:38,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:37" (1/1) ... [2020-11-28 07:41:38,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:37" (1/1) ... [2020-11-28 07:41:38,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:37" (1/1) ... [2020-11-28 07:41:38,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:37" (1/1) ... [2020-11-28 07:41:38,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:41:38,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:41:38,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:41:38,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:41:38,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/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 [2020-11-28 07:41:38,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-11-28 07:41:38,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-11-28 07:41:38,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-28 07:41:38,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:41:38,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-28 07:41:38,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:41:38,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:41:38,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:41:38,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-11-28 07:41:41,897 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:41:41,897 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 07:41:41,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:41 BoogieIcfgContainer [2020-11-28 07:41:41,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:41:41,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:41:41,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:41:41,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:41:41,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:41:37" (1/3) ... [2020-11-28 07:41:41,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f85abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:41, skipping insertion in model container [2020-11-28 07:41:41,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:37" (2/3) ... [2020-11-28 07:41:41,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f85abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:41, skipping insertion in model container [2020-11-28 07:41:41,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:41" (3/3) ... [2020-11-28 07:41:41,908 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-11-28 07:41:41,920 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:41:41,925 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:41:41,938 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:41:41,963 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:41:41,963 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:41:41,963 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:41:41,963 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:41:41,964 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:41:41,964 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:41:41,964 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:41:41,964 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:41:41,976 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-28 07:41:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:41:41,981 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:41,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:41,983 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:41,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:41,988 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-11-28 07:41:42,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:41:42,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642959777] [2020-11-28 07:41:42,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/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 [2020-11-28 07:41:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:43,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-28 07:41:43,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:43,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:43,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642959777] [2020-11-28 07:41:43,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:43,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-28 07:41:43,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511750296] [2020-11-28 07:41:43,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:41:43,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:41:43,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:41:43,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:41:43,728 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-11-28 07:41:43,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:43,744 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-28 07:41:43,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:41:43,745 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-28 07:41:43,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:43,754 INFO L225 Difference]: With dead ends: 26 [2020-11-28 07:41:43,754 INFO L226 Difference]: Without dead ends: 10 [2020-11-28 07:41:43,757 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 [2020-11-28 07:41:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-28 07:41:43,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-28 07:41:43,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 07:41:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-28 07:41:43,786 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-11-28 07:41:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:43,786 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-28 07:41:43,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:41:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-28 07:41:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:41:43,787 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:43,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:44,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-28 07:41:44,001 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:44,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:44,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-11-28 07:41:44,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:41:44,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005529096] [2020-11-28 07:41:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/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 [2020-11-28 07:41:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:41:45,967 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:41:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:41:47,972 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:41:48,134 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-28 07:41:48,134 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:41:48,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-28 07:41:48,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:41:48 BoogieIcfgContainer [2020-11-28 07:41:48,385 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:41:48,386 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:41:48,386 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:41:48,386 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:41:48,387 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:41" (3/4) ... [2020-11-28 07:41:48,389 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:41:48,488 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1d46bf0b-037d-4b1e-9d97-cc4b5cb4014f/bin/utaipan/witness.graphml [2020-11-28 07:41:48,489 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:41:48,491 INFO L168 Benchmark]: Toolchain (without parser) took 10982.89 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 51.6 MB in the beginning and 55.4 MB in the end (delta: -3.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:48,492 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 69.2 MB. Free memory was 51.2 MB in the beginning and 51.1 MB in the end (delta: 54.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:48,493 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.81 ms. Allocated memory is still 69.2 MB. Free memory was 51.5 MB in the beginning and 40.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:48,494 INFO L168 Benchmark]: Boogie Procedure Inliner took 114.48 ms. Allocated memory is still 69.2 MB. Free memory was 40.2 MB in the beginning and 51.8 MB in the end (delta: -11.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:48,494 INFO L168 Benchmark]: Boogie Preprocessor took 72.00 ms. Allocated memory is still 69.2 MB. Free memory was 51.8 MB in the beginning and 50.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:48,495 INFO L168 Benchmark]: RCFGBuilder took 3836.35 ms. Allocated memory is still 69.2 MB. Free memory was 50.3 MB in the beginning and 34.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:48,496 INFO L168 Benchmark]: TraceAbstraction took 6483.99 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 33.8 MB in the beginning and 58.5 MB in the end (delta: -24.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:48,497 INFO L168 Benchmark]: Witness Printer took 103.00 ms. Allocated memory is still 83.9 MB. Free memory was 58.0 MB in the beginning and 55.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:48,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 69.2 MB. Free memory was 51.2 MB in the beginning and 51.1 MB in the end (delta: 54.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 361.81 ms. Allocated memory is still 69.2 MB. Free memory was 51.5 MB in the beginning and 40.2 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 114.48 ms. Allocated memory is still 69.2 MB. Free memory was 40.2 MB in the beginning and 51.8 MB in the end (delta: -11.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 72.00 ms. Allocated memory is still 69.2 MB. Free memory was 51.8 MB in the beginning and 50.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 3836.35 ms. Allocated memory is still 69.2 MB. Free memory was 50.3 MB in the beginning and 34.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6483.99 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 33.8 MB in the beginning and 58.5 MB in the end (delta: -24.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 103.00 ms. Allocated memory is still 83.9 MB. Free memory was 58.0 MB in the beginning and 55.4 MB in the end (delta: 2.6 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: 6.3s, 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, 3.3s 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...