./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cdfpl/newton_1_7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/newton_1_7.i -s /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/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 46f9db3b7991e6681e893353a1157ad7f5bf9fdc ................................................................................................................................................................................................................................................ 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_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/newton_1_7.i -s /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/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 46f9db3b7991e6681e893353a1157ad7f5bf9fdc ........................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 06:02:28,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 06:02:28,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 06:02:28,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 06:02:28,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 06:02:28,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 06:02:28,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 06:02:28,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 06:02:28,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 06:02:28,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 06:02:28,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 06:02:28,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 06:02:28,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 06:02:28,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 06:02:28,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 06:02:28,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 06:02:28,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 06:02:28,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 06:02:28,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 06:02:28,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 06:02:28,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 06:02:28,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 06:02:28,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 06:02:28,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 06:02:28,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 06:02:28,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 06:02:28,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 06:02:28,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 06:02:28,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 06:02:28,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 06:02:28,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 06:02:28,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 06:02:28,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 06:02:28,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 06:02:28,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 06:02:28,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 06:02:28,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 06:02:28,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 06:02:28,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 06:02:28,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 06:02:28,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 06:02:28,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 06:02:28,291 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 06:02:28,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 06:02:28,292 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 06:02:28,293 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 06:02:28,293 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 06:02:28,299 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 06:02:28,299 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 06:02:28,299 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 06:02:28,299 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 06:02:28,299 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 06:02:28,299 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 06:02:28,300 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 06:02:28,300 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 06:02:28,300 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 06:02:28,300 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 06:02:28,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 06:02:28,301 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 06:02:28,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 06:02:28,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 06:02:28,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 06:02:28,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 06:02:28,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 06:02:28,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 06:02:28,302 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 06:02:28,302 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 06:02:28,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 06:02:28,302 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 06:02:28,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 06:02:28,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 06:02:28,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 06:02:28,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:02:28,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 06:02:28,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 06:02:28,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 06:02:28,303 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 06:02:28,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 06:02:28,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 06:02:28,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 06:02:28,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 06:02:28,304 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_8a11339c-9cd3-480f-876f-5621e300ce49/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46f9db3b7991e6681e893353a1157ad7f5bf9fdc [2020-12-09 06:02:28,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 06:02:28,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 06:02:28,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 06:02:28,504 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 06:02:28,504 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 06:02:28,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/../../sv-benchmarks/c/floats-cdfpl/newton_1_7.i [2020-12-09 06:02:28,547 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/data/06d88d4e7/c2c173ca676a42479c566f885928895f/FLAG0ccd05fe5 [2020-12-09 06:02:28,906 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 06:02:28,907 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/sv-benchmarks/c/floats-cdfpl/newton_1_7.i [2020-12-09 06:02:28,915 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/data/06d88d4e7/c2c173ca676a42479c566f885928895f/FLAG0ccd05fe5 [2020-12-09 06:02:28,925 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/data/06d88d4e7/c2c173ca676a42479c566f885928895f [2020-12-09 06:02:28,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 06:02:28,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 06:02:28,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 06:02:28,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 06:02:28,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 06:02:28,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:02:28" (1/1) ... [2020-12-09 06:02:28,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1703d8a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:28, skipping insertion in model container [2020-12-09 06:02:28,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:02:28" (1/1) ... [2020-12-09 06:02:28,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 06:02:28,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 06:02:29,064 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/sv-benchmarks/c/floats-cdfpl/newton_1_7.i[1224,1237] [2020-12-09 06:02:29,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:02:29,073 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 06:02:29,085 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/sv-benchmarks/c/floats-cdfpl/newton_1_7.i[1224,1237] [2020-12-09 06:02:29,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:02:29,096 INFO L208 MainTranslator]: Completed translation [2020-12-09 06:02:29,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:29 WrapperNode [2020-12-09 06:02:29,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 06:02:29,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 06:02:29,097 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 06:02:29,097 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 06:02:29,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:29" (1/1) ... [2020-12-09 06:02:29,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:29" (1/1) ... [2020-12-09 06:02:29,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 06:02:29,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 06:02:29,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 06:02:29,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 06:02:29,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:29" (1/1) ... [2020-12-09 06:02:29,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:29" (1/1) ... [2020-12-09 06:02:29,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:29" (1/1) ... [2020-12-09 06:02:29,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:29" (1/1) ... [2020-12-09 06:02:29,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:29" (1/1) ... [2020-12-09 06:02:29,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:29" (1/1) ... [2020-12-09 06:02:29,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:29" (1/1) ... [2020-12-09 06:02:29,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 06:02:29,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 06:02:29,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 06:02:29,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 06:02:29,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:02:29,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 06:02:29,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 06:02:29,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 06:02:29,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 06:02:29,373 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 06:02:29,373 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 06:02:29,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:29 BoogieIcfgContainer [2020-12-09 06:02:29,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 06:02:29,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 06:02:29,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 06:02:29,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 06:02:29,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:02:28" (1/3) ... [2020-12-09 06:02:29,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715b3e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:02:29, skipping insertion in model container [2020-12-09 06:02:29,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:29" (2/3) ... [2020-12-09 06:02:29,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715b3e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:02:29, skipping insertion in model container [2020-12-09 06:02:29,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:29" (3/3) ... [2020-12-09 06:02:29,380 INFO L111 eAbstractionObserver]: Analyzing ICFG newton_1_7.i [2020-12-09 06:02:29,390 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 06:02:29,392 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 06:02:29,399 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 06:02:29,416 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 06:02:29,416 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 06:02:29,416 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 06:02:29,416 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 06:02:29,416 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 06:02:29,416 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 06:02:29,416 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 06:02:29,416 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 06:02:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-12-09 06:02:29,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 06:02:29,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:02:29,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 06:02:29,428 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:02:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:02:29,433 INFO L82 PathProgramCache]: Analyzing trace with hash 62017, now seen corresponding path program 1 times [2020-12-09 06:02:29,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 06:02:29,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950890008] [2020-12-09 06:02:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 06:02:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 06:02:29,513 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 06:02:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 06:02:29,526 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 06:02:29,539 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 06:02:29,540 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 06:02:29,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 06:02:29,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:02:29 BoogieIcfgContainer [2020-12-09 06:02:29,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 06:02:29,555 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 06:02:29,555 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 06:02:29,555 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 06:02:29,555 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:29" (3/4) ... [2020-12-09 06:02:29,558 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 06:02:29,559 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 06:02:29,561 INFO L168 Benchmark]: Toolchain (without parser) took 629.00 ms. Allocated memory is still 117.4 MB. Free memory was 96.7 MB in the beginning and 54.0 MB in the end (delta: 42.7 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. [2020-12-09 06:02:29,562 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 83.9 MB. Free memory was 58.3 MB in the beginning and 58.2 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:02:29,562 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.45 ms. Allocated memory is still 117.4 MB. Free memory was 96.7 MB in the beginning and 86.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 06:02:29,563 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.97 ms. Allocated memory is still 117.4 MB. Free memory was 86.6 MB in the beginning and 85.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:02:29,564 INFO L168 Benchmark]: Boogie Preprocessor took 19.40 ms. Allocated memory is still 117.4 MB. Free memory was 85.0 MB in the beginning and 84.1 MB in the end (delta: 912.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:02:29,565 INFO L168 Benchmark]: RCFGBuilder took 228.80 ms. Allocated memory is still 117.4 MB. Free memory was 84.1 MB in the beginning and 67.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-09 06:02:29,566 INFO L168 Benchmark]: TraceAbstraction took 178.19 ms. Allocated memory is still 117.4 MB. Free memory was 66.8 MB in the beginning and 54.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 06:02:29,567 INFO L168 Benchmark]: Witness Printer took 4.08 ms. Allocated memory is still 117.4 MB. Free memory was 54.2 MB in the beginning and 54.0 MB in the end (delta: 196.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:02:29,571 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 83.9 MB. Free memory was 58.3 MB in the beginning and 58.2 MB in the end (delta: 76.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 165.45 ms. Allocated memory is still 117.4 MB. Free memory was 96.7 MB in the beginning and 86.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.97 ms. Allocated memory is still 117.4 MB. Free memory was 86.6 MB in the beginning and 85.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.40 ms. Allocated memory is still 117.4 MB. Free memory was 85.0 MB in the beginning and 84.1 MB in the end (delta: 912.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 228.80 ms. Allocated memory is still 117.4 MB. Free memory was 84.1 MB in the beginning and 67.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 178.19 ms. Allocated memory is still 117.4 MB. Free memory was 66.8 MB in the beginning and 54.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.08 ms. Allocated memory is still 117.4 MB. Free memory was 54.2 MB in the beginning and 54.0 MB in the end (delta: 196.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 42]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 31, overapproximation of someBinaryDOUBLEComparisonOperation at line 41, overapproximation of someBinaryArithmeticFLOAToperation at line 20. Possible FailurePath: [L30] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L20] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L25] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L33] float x = IN - f(IN)/fp(IN); [L41] COND TRUE !(x < 0.1) [L42] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 06:02:31,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 06:02:31,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 06:02:31,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 06:02:31,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 06:02:31,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 06:02:31,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 06:02:31,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 06:02:31,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 06:02:31,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 06:02:31,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 06:02:31,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 06:02:31,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 06:02:31,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 06:02:31,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 06:02:31,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 06:02:31,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 06:02:31,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 06:02:31,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 06:02:31,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 06:02:31,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 06:02:31,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 06:02:31,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 06:02:31,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 06:02:31,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 06:02:31,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 06:02:31,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 06:02:31,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 06:02:31,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 06:02:31,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 06:02:31,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 06:02:31,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 06:02:31,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 06:02:31,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 06:02:31,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 06:02:31,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 06:02:31,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 06:02:31,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 06:02:31,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 06:02:31,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 06:02:31,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 06:02:31,233 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 06:02:31,257 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 06:02:31,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 06:02:31,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 06:02:31,259 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 06:02:31,259 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 06:02:31,259 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 06:02:31,259 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 06:02:31,260 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 06:02:31,260 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 06:02:31,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 06:02:31,261 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 06:02:31,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 06:02:31,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 06:02:31,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 06:02:31,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 06:02:31,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 06:02:31,262 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 06:02:31,262 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 06:02:31,262 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 06:02:31,262 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 06:02:31,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 06:02:31,263 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 06:02:31,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 06:02:31,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 06:02:31,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 06:02:31,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 06:02:31,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:02:31,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 06:02:31,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 06:02:31,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 06:02:31,265 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 06:02:31,265 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 06:02:31,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 06:02:31,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 06:02:31,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 06:02:31,266 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_8a11339c-9cd3-480f-876f-5621e300ce49/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46f9db3b7991e6681e893353a1157ad7f5bf9fdc [2020-12-09 06:02:31,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 06:02:31,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 06:02:31,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 06:02:31,514 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 06:02:31,515 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 06:02:31,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/../../sv-benchmarks/c/floats-cdfpl/newton_1_7.i [2020-12-09 06:02:31,559 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/data/93117c2cc/5fdeed787c874e37bdb26b4cb706f0c1/FLAGa3ec5c278 [2020-12-09 06:02:31,966 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 06:02:31,967 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/sv-benchmarks/c/floats-cdfpl/newton_1_7.i [2020-12-09 06:02:31,972 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/data/93117c2cc/5fdeed787c874e37bdb26b4cb706f0c1/FLAGa3ec5c278 [2020-12-09 06:02:31,981 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/data/93117c2cc/5fdeed787c874e37bdb26b4cb706f0c1 [2020-12-09 06:02:31,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 06:02:31,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 06:02:31,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 06:02:31,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 06:02:31,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 06:02:31,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:02:31" (1/1) ... [2020-12-09 06:02:31,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58c4c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:31, skipping insertion in model container [2020-12-09 06:02:31,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:02:31" (1/1) ... [2020-12-09 06:02:31,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 06:02:32,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 06:02:32,114 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/sv-benchmarks/c/floats-cdfpl/newton_1_7.i[1224,1237] [2020-12-09 06:02:32,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:02:32,126 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 06:02:32,140 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/sv-benchmarks/c/floats-cdfpl/newton_1_7.i[1224,1237] [2020-12-09 06:02:32,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 06:02:32,152 INFO L208 MainTranslator]: Completed translation [2020-12-09 06:02:32,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:32 WrapperNode [2020-12-09 06:02:32,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 06:02:32,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 06:02:32,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 06:02:32,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 06:02:32,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:32" (1/1) ... [2020-12-09 06:02:32,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:32" (1/1) ... [2020-12-09 06:02:32,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 06:02:32,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 06:02:32,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 06:02:32,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 06:02:32,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:32" (1/1) ... [2020-12-09 06:02:32,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:32" (1/1) ... [2020-12-09 06:02:32,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:32" (1/1) ... [2020-12-09 06:02:32,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:32" (1/1) ... [2020-12-09 06:02:32,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:32" (1/1) ... [2020-12-09 06:02:32,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:32" (1/1) ... [2020-12-09 06:02:32,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:32" (1/1) ... [2020-12-09 06:02:32,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 06:02:32,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 06:02:32,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 06:02:32,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 06:02:32,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 06:02:32,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 06:02:32,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 06:02:32,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 06:02:32,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 06:02:39,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 06:02:39,043 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 06:02:39,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:39 BoogieIcfgContainer [2020-12-09 06:02:39,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 06:02:39,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 06:02:39,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 06:02:39,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 06:02:39,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:02:31" (1/3) ... [2020-12-09 06:02:39,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77761147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:02:39, skipping insertion in model container [2020-12-09 06:02:39,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:02:32" (2/3) ... [2020-12-09 06:02:39,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77761147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:02:39, skipping insertion in model container [2020-12-09 06:02:39,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:39" (3/3) ... [2020-12-09 06:02:39,051 INFO L111 eAbstractionObserver]: Analyzing ICFG newton_1_7.i [2020-12-09 06:02:39,060 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 06:02:39,063 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 06:02:39,071 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 06:02:39,087 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 06:02:39,087 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 06:02:39,087 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 06:02:39,087 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 06:02:39,087 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 06:02:39,087 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 06:02:39,087 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 06:02:39,087 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 06:02:39,095 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-09 06:02:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 06:02:39,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:02:39,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:02:39,099 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:02:39,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:02:39,103 INFO L82 PathProgramCache]: Analyzing trace with hash 119351050, now seen corresponding path program 1 times [2020-12-09 06:02:39,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 06:02:39,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828324806] [2020-12-09 06:02:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 06:02:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 06:02:40,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 06:02:40,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 06:02:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 06:02:40,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 06:02:40,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828324806] [2020-12-09 06:02:40,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 06:02:40,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 06:02:40,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444263469] [2020-12-09 06:02:40,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 06:02:40,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 06:02:40,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 06:02:40,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 06:02:40,241 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-09 06:02:40,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 06:02:40,250 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-12-09 06:02:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 06:02:40,251 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-09 06:02:40,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 06:02:40,256 INFO L225 Difference]: With dead ends: 23 [2020-12-09 06:02:40,257 INFO L226 Difference]: Without dead ends: 9 [2020-12-09 06:02:40,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 06:02:40,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-09 06:02:40,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-09 06:02:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-09 06:02:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8 transitions. [2020-12-09 06:02:40,279 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 8 transitions. Word has length 8 [2020-12-09 06:02:40,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 06:02:40,279 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 8 transitions. [2020-12-09 06:02:40,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 06:02:40,280 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 8 transitions. [2020-12-09 06:02:40,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 06:02:40,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 06:02:40,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 06:02:40,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 06:02:40,481 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 06:02:40,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 06:02:40,481 INFO L82 PathProgramCache]: Analyzing trace with hash 176609352, now seen corresponding path program 1 times [2020-12-09 06:02:40,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 06:02:40,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179905326] [2020-12-09 06:02:40,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 06:08:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 06:08:32,283 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 06:13:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 06:13:01,673 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 06:13:01,777 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 06:13:01,778 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 06:13:01,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 06:13:02,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:13:02 BoogieIcfgContainer [2020-12-09 06:13:02,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 06:13:02,037 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 06:13:02,037 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 06:13:02,037 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 06:13:02,038 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:02:39" (3/4) ... [2020-12-09 06:13:02,040 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 06:13:02,063 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8a11339c-9cd3-480f-876f-5621e300ce49/bin/utaipan/witness.graphml [2020-12-09 06:13:02,063 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 06:13:02,065 INFO L168 Benchmark]: Toolchain (without parser) took 630079.76 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 30.3 MB in the beginning and 54.4 MB in the end (delta: -24.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:13:02,065 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 52.4 MB. Free memory was 35.4 MB in the beginning and 35.3 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:13:02,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.38 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 30.1 MB in the beginning and 52.2 MB in the end (delta: -22.1 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-12-09 06:13:02,066 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.36 ms. Allocated memory is still 73.4 MB. Free memory was 52.2 MB in the beginning and 57.4 MB in the end (delta: -5.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 06:13:02,066 INFO L168 Benchmark]: Boogie Preprocessor took 26.48 ms. Allocated memory is still 73.4 MB. Free memory was 57.4 MB in the beginning and 56.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:13:02,067 INFO L168 Benchmark]: RCFGBuilder took 6825.91 ms. Allocated memory is still 73.4 MB. Free memory was 56.0 MB in the beginning and 44.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 06:13:02,067 INFO L168 Benchmark]: TraceAbstraction took 622990.73 ms. Allocated memory is still 73.4 MB. Free memory was 43.7 MB in the beginning and 56.1 MB in the end (delta: -12.4 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2020-12-09 06:13:02,067 INFO L168 Benchmark]: Witness Printer took 26.18 ms. Allocated memory is still 73.4 MB. Free memory was 56.1 MB in the beginning and 54.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 06:13:02,070 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 52.4 MB. Free memory was 35.4 MB in the beginning and 35.3 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 167.38 ms. Allocated memory was 52.4 MB in the beginning and 73.4 MB in the end (delta: 21.0 MB). Free memory was 30.1 MB in the beginning and 52.2 MB in the end (delta: -22.1 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.36 ms. Allocated memory is still 73.4 MB. Free memory was 52.2 MB in the beginning and 57.4 MB in the end (delta: -5.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.48 ms. Allocated memory is still 73.4 MB. Free memory was 57.4 MB in the beginning and 56.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 6825.91 ms. Allocated memory is still 73.4 MB. Free memory was 56.0 MB in the beginning and 44.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 622990.73 ms. Allocated memory is still 73.4 MB. Free memory was 43.7 MB in the beginning and 56.1 MB in the end (delta: -12.4 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * Witness Printer took 26.18 ms. Allocated memory is still 73.4 MB. Free memory was 56.1 MB in the beginning and 54.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 42]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L30] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L20] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L25] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L33] float x = IN - f(IN)/fp(IN); [L41] COND TRUE !(x < 0.1) [L42] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 622.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 352.7s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...