./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/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_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/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 0.2.0-7b2dab5 [2020-12-09 12:24:49,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:24:49,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:24:49,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:24:49,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:24:49,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:24:49,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:24:49,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:24:49,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:24:49,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:24:49,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:24:49,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:24:49,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:24:49,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:24:49,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:24:49,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:24:49,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:24:49,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:24:49,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:24:49,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:24:49,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:24:49,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:24:49,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:24:49,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:24:49,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:24:49,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:24:49,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:24:49,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:24:49,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:24:49,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:24:49,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:24:49,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:24:49,381 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:24:49,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:24:49,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:24:49,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:24:49,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:24:49,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:24:49,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:24:49,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:24:49,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:24:49,385 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 12:24:49,401 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:24:49,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:24:49,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:24:49,402 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:24:49,402 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:24:49,402 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:24:49,402 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 12:24:49,402 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:24:49,402 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:24:49,402 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 12:24:49,402 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 12:24:49,403 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:24:49,403 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 12:24:49,403 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 12:24:49,403 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 12:24:49,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:24:49,404 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:24:49,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 12:24:49,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:24:49,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:24:49,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 12:24:49,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:24:49,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 12:24:49,404 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:24:49,404 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:24:49,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 12:24:49,405 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:24:49,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 12:24:49,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:24:49,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:24:49,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:24:49,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:24:49,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:24:49,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 12:24:49,405 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 12:24:49,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 12:24:49,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 12:24:49,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:24:49,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:24:49,406 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_ef7c44b6-ee09-444c-8da0-89fd3360f380/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-12-09 12:24:49,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:24:49,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:24:49,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:24:49,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:24:49,603 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:24:49,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-12-09 12:24:49,648 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/data/a4e06f91a/ab0eb4bec7a748108f47e37438731e7b/FLAGfb9dec128 [2020-12-09 12:24:50,000 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:24:50,001 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-12-09 12:24:50,005 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/data/a4e06f91a/ab0eb4bec7a748108f47e37438731e7b/FLAGfb9dec128 [2020-12-09 12:24:50,015 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/data/a4e06f91a/ab0eb4bec7a748108f47e37438731e7b [2020-12-09 12:24:50,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:24:50,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:24:50,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:24:50,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:24:50,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:24:50,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:24:50" (1/1) ... [2020-12-09 12:24:50,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fad5ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:50, skipping insertion in model container [2020-12-09 12:24:50,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:24:50" (1/1) ... [2020-12-09 12:24:50,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:24:50,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:24:50,151 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_ef7c44b6-ee09-444c-8da0-89fd3360f380/sv-benchmarks/c/float-benchs/sqrt_poly2.c[587,600] [2020-12-09 12:24:50,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:24:50,176 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:24:50,184 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_ef7c44b6-ee09-444c-8da0-89fd3360f380/sv-benchmarks/c/float-benchs/sqrt_poly2.c[587,600] [2020-12-09 12:24:50,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:24:50,203 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:24:50,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:50 WrapperNode [2020-12-09 12:24:50,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:24:50,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:24:50,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:24:50,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:24:50,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:50" (1/1) ... [2020-12-09 12:24:50,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:50" (1/1) ... [2020-12-09 12:24:50,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:24:50,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:24:50,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:24:50,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:24:50,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:50" (1/1) ... [2020-12-09 12:24:50,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:50" (1/1) ... [2020-12-09 12:24:50,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:50" (1/1) ... [2020-12-09 12:24:50,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:50" (1/1) ... [2020-12-09 12:24:50,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:50" (1/1) ... [2020-12-09 12:24:50,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:50" (1/1) ... [2020-12-09 12:24:50,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:50" (1/1) ... [2020-12-09 12:24:50,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:24:50,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:24:50,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:24:50,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:24:50,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/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 12:24:50,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 12:24:50,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:24:50,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-09 12:24:50,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 12:24:50,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-09 12:24:50,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:24:50,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:24:50,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 12:24:50,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 12:24:50,651 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:24:50,652 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 12:24:50,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:24:50 BoogieIcfgContainer [2020-12-09 12:24:50,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:24:50,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:24:50,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:24:50,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:24:50,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:24:50" (1/3) ... [2020-12-09 12:24:50,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c46c90e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:24:50, skipping insertion in model container [2020-12-09 12:24:50,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:50" (2/3) ... [2020-12-09 12:24:50,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c46c90e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:24:50, skipping insertion in model container [2020-12-09 12:24:50,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:24:50" (3/3) ... [2020-12-09 12:24:50,659 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-12-09 12:24:50,668 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:24:50,670 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 12:24:50,677 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 12:24:50,693 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:24:50,693 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 12:24:50,693 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:24:50,693 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:24:50,693 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:24:50,693 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:24:50,693 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:24:50,693 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:24:50,701 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-12-09 12:24:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 12:24:50,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:24:50,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 12:24:50,705 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:24:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:24:50,708 INFO L82 PathProgramCache]: Analyzing trace with hash 70827, now seen corresponding path program 1 times [2020-12-09 12:24:50,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:24:50,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277970040] [2020-12-09 12:24:50,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:24:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:24:50,818 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:24:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:24:50,845 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:24:50,861 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 12:24:50,861 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 12:24:50,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 12:24:50,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:24:50 BoogieIcfgContainer [2020-12-09 12:24:50,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:24:50,880 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:24:50,880 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:24:50,880 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:24:50,880 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:24:50" (3/4) ... [2020-12-09 12:24:50,883 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 12:24:50,883 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:24:50,884 INFO L168 Benchmark]: Toolchain (without parser) took 865.12 ms. Allocated memory is still 115.3 MB. Free memory was 86.3 MB in the beginning and 61.8 MB in the end (delta: 24.5 MB). Peak memory consumption was 24.2 MB. Max. memory is 16.1 GB. [2020-12-09 12:24:50,885 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 115.3 MB. Free memory is still 94.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:24:50,885 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.37 ms. Allocated memory is still 115.3 MB. Free memory was 86.2 MB in the beginning and 75.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 12:24:50,886 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.11 ms. Allocated memory is still 115.3 MB. Free memory was 75.6 MB in the beginning and 74.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:24:50,886 INFO L168 Benchmark]: Boogie Preprocessor took 17.42 ms. Allocated memory is still 115.3 MB. Free memory was 74.1 MB in the beginning and 72.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:24:50,887 INFO L168 Benchmark]: RCFGBuilder took 402.16 ms. Allocated memory is still 115.3 MB. Free memory was 72.7 MB in the beginning and 78.1 MB in the end (delta: -5.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 12:24:50,887 INFO L168 Benchmark]: TraceAbstraction took 225.07 ms. Allocated memory is still 115.3 MB. Free memory was 77.5 MB in the beginning and 62.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 12:24:50,888 INFO L168 Benchmark]: Witness Printer took 2.94 ms. Allocated memory is still 115.3 MB. Free memory was 62.3 MB in the beginning and 61.8 MB in the end (delta: 461.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:24:50,891 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 115.3 MB. Free memory is still 94.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 184.37 ms. Allocated memory is still 115.3 MB. Free memory was 86.2 MB in the beginning and 75.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.11 ms. Allocated memory is still 115.3 MB. Free memory was 75.6 MB in the beginning and 74.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.42 ms. Allocated memory is still 115.3 MB. Free memory was 74.1 MB in the beginning and 72.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 402.16 ms. Allocated memory is still 115.3 MB. Free memory was 72.7 MB in the beginning and 78.1 MB in the end (delta: -5.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 225.07 ms. Allocated memory is still 115.3 MB. Free memory was 77.5 MB in the beginning and 62.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Witness Printer took 2.94 ms. Allocated memory is still 115.3 MB. Free memory was 62.3 MB in the beginning and 61.8 MB in the end (delta: 461.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 38, overapproximation of someUnaryDOUBLEoperation at line 20, overapproximation of someBinaryArithmeticDOUBLEoperation at line 39, overapproximation of bitwiseAnd at line 37, overapproximation of someBinaryDOUBLEComparisonOperation at line 61. Possible FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [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 TRUE exp % 2 == 0 [L44] exp++ [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] [L14] 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: 0.1s, 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 12:24:52,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:24:52,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:24:52,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:24:52,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:24:52,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:24:52,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:24:52,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:24:52,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:24:52,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:24:52,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:24:52,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:24:52,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:24:52,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:24:52,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:24:52,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:24:52,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:24:52,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:24:52,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:24:52,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:24:52,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:24:52,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:24:52,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:24:52,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:24:52,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:24:52,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:24:52,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:24:52,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:24:52,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:24:52,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:24:52,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:24:52,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:24:52,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:24:52,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:24:52,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:24:52,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:24:52,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:24:52,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:24:52,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:24:52,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:24:52,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:24:52,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 12:24:52,506 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:24:52,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:24:52,507 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:24:52,507 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:24:52,508 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:24:52,508 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:24:52,508 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:24:52,508 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:24:52,508 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:24:52,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:24:52,509 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:24:52,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:24:52,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:24:52,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 12:24:52,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:24:52,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 12:24:52,510 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:24:52,511 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 12:24:52,511 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 12:24:52,511 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:24:52,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 12:24:52,511 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:24:52,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 12:24:52,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:24:52,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 12:24:52,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:24:52,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:24:52,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:24:52,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:24:52,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 12:24:52,513 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 12:24:52,513 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 12:24:52,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 12:24:52,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:24:52,514 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:24:52,514 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_ef7c44b6-ee09-444c-8da0-89fd3360f380/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-12-09 12:24:52,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:24:52,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:24:52,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:24:52,775 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:24:52,775 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:24:52,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-12-09 12:24:52,817 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/data/1bf16eb06/07dedad371884db496b31caac294f969/FLAG1833fd85d [2020-12-09 12:24:53,222 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:24:53,223 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-12-09 12:24:53,228 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/data/1bf16eb06/07dedad371884db496b31caac294f969/FLAG1833fd85d [2020-12-09 12:24:53,237 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/data/1bf16eb06/07dedad371884db496b31caac294f969 [2020-12-09 12:24:53,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:24:53,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:24:53,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:24:53,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:24:53,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:24:53,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:24:53" (1/1) ... [2020-12-09 12:24:53,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae02c67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:53, skipping insertion in model container [2020-12-09 12:24:53,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:24:53" (1/1) ... [2020-12-09 12:24:53,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:24:53,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:24:53,361 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_ef7c44b6-ee09-444c-8da0-89fd3360f380/sv-benchmarks/c/float-benchs/sqrt_poly2.c[587,600] [2020-12-09 12:24:53,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:24:53,392 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:24:53,402 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_ef7c44b6-ee09-444c-8da0-89fd3360f380/sv-benchmarks/c/float-benchs/sqrt_poly2.c[587,600] [2020-12-09 12:24:53,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:24:53,440 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:24:53,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:53 WrapperNode [2020-12-09 12:24:53,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:24:53,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:24:53,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:24:53,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:24:53,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:53" (1/1) ... [2020-12-09 12:24:53,462 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:53" (1/1) ... [2020-12-09 12:24:53,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:24:53,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:24:53,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:24:53,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:24:53,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:53" (1/1) ... [2020-12-09 12:24:53,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:53" (1/1) ... [2020-12-09 12:24:53,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:53" (1/1) ... [2020-12-09 12:24:53,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:53" (1/1) ... [2020-12-09 12:24:53,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:53" (1/1) ... [2020-12-09 12:24:53,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:53" (1/1) ... [2020-12-09 12:24:53,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:53" (1/1) ... [2020-12-09 12:24:53,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:24:53,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:24:53,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:24:53,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:24:53,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/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 12:24:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-12-09 12:24:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-12-09 12:24:53,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 12:24:53,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:24:53,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 12:24:53,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:24:53,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:24:53,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 12:24:53,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 12:24:58,502 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:24:58,502 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 12:24:58,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:24:58 BoogieIcfgContainer [2020-12-09 12:24:58,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:24:58,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:24:58,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:24:58,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:24:58,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:24:53" (1/3) ... [2020-12-09 12:24:58,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee1bd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:24:58, skipping insertion in model container [2020-12-09 12:24:58,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:24:53" (2/3) ... [2020-12-09 12:24:58,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee1bd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:24:58, skipping insertion in model container [2020-12-09 12:24:58,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:24:58" (3/3) ... [2020-12-09 12:24:58,516 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-12-09 12:24:58,527 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:24:58,530 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 12:24:58,538 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 12:24:58,554 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:24:58,554 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 12:24:58,554 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:24:58,554 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:24:58,554 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:24:58,554 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:24:58,554 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:24:58,554 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:24:58,562 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-09 12:24:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 12:24:58,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:24:58,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:24:58,566 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:24:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:24:58,570 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-12-09 12:24:58,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:24:58,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607213422] [2020-12-09 12:24:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/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 12:24:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:24:59,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 12:24:59,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:24:59,770 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 12:24:59,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 12:24:59,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607213422] [2020-12-09 12:24:59,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:24:59,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:24:59,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194288661] [2020-12-09 12:24:59,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 12:24:59,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 12:24:59,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 12:24:59,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 12:24:59,785 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-12-09 12:24:59,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:24:59,795 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-09 12:24:59,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 12:24:59,796 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-09 12:24:59,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:24:59,802 INFO L225 Difference]: With dead ends: 25 [2020-12-09 12:24:59,802 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 12:24:59,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 12:24:59,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 12:24:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-09 12:24:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 12:24:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-09 12:24:59,823 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-12-09 12:24:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:24:59,823 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-09 12:24:59,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 12:24:59,824 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-09 12:24:59,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 12:24:59,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:24:59,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:25:00,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 12:25:00,025 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:25:00,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:25:00,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-12-09 12:25:00,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 12:25:00,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370903459] [2020-12-09 12:25:00,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/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 12:25:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:25:07,397 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:25:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:25:12,338 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:25:12,441 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 12:25:12,441 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 12:25:12,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 12:25:12,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:25:12 BoogieIcfgContainer [2020-12-09 12:25:12,704 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:25:12,704 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:25:12,705 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:25:12,705 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:25:12,705 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:24:58" (3/4) ... [2020-12-09 12:25:12,707 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 12:25:12,740 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ef7c44b6-ee09-444c-8da0-89fd3360f380/bin/utaipan/witness.graphml [2020-12-09 12:25:12,740 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:25:12,742 INFO L168 Benchmark]: Toolchain (without parser) took 19500.84 ms. Allocated memory was 65.0 MB in the beginning and 83.9 MB in the end (delta: 18.9 MB). Free memory was 46.9 MB in the beginning and 53.0 MB in the end (delta: -6.1 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. [2020-12-09 12:25:12,742 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 65.0 MB. Free memory is still 48.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:25:12,742 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.55 ms. Allocated memory is still 65.0 MB. Free memory was 46.7 MB in the beginning and 49.4 MB in the end (delta: -2.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2020-12-09 12:25:12,743 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.66 ms. Allocated memory is still 65.0 MB. Free memory was 49.4 MB in the beginning and 47.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:25:12,743 INFO L168 Benchmark]: Boogie Preprocessor took 28.82 ms. Allocated memory is still 65.0 MB. Free memory was 47.8 MB in the beginning and 46.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:25:12,744 INFO L168 Benchmark]: RCFGBuilder took 5002.21 ms. Allocated memory was 65.0 MB in the beginning and 83.9 MB in the end (delta: 18.9 MB). Free memory was 46.3 MB in the beginning and 67.1 MB in the end (delta: -20.8 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:25:12,744 INFO L168 Benchmark]: TraceAbstraction took 14193.39 ms. Allocated memory is still 83.9 MB. Free memory was 66.8 MB in the beginning and 55.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2020-12-09 12:25:12,744 INFO L168 Benchmark]: Witness Printer took 35.91 ms. Allocated memory is still 83.9 MB. Free memory was 55.7 MB in the beginning and 53.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:25:12,746 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 65.0 MB. Free memory is still 48.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 199.55 ms. Allocated memory is still 65.0 MB. Free memory was 46.7 MB in the beginning and 49.4 MB in the end (delta: -2.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.66 ms. Allocated memory is still 65.0 MB. Free memory was 49.4 MB in the beginning and 47.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.82 ms. Allocated memory is still 65.0 MB. Free memory was 47.8 MB in the beginning and 46.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 5002.21 ms. Allocated memory was 65.0 MB in the beginning and 83.9 MB in the end (delta: 18.9 MB). Free memory was 46.3 MB in the beginning and 67.1 MB in the end (delta: -20.8 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14193.39 ms. Allocated memory is still 83.9 MB. Free memory was 66.8 MB in the beginning and 55.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Witness Printer took 35.91 ms. Allocated memory is still 83.9 MB. Free memory was 55.7 MB in the beginning and 53.0 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: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [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] [L14] 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, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.0s, 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, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 8.4s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 64 SizeOfPredicates, 0 NumberOfNonLiveVariables, 56 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...