./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/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_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/sqrt_poly2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d97d268d682e2021ff98bdbb1deaf100696d038 ............................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:21:07,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:21:07,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:21:07,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:21:07,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:21:07,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:21:07,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:21:07,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:21:07,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:21:07,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:21:07,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:21:07,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:21:07,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:21:07,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:21:07,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:21:07,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:21:07,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:21:07,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:21:07,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:21:07,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:21:07,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:21:07,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:21:07,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:21:07,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:21:07,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:21:07,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:21:07,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:21:07,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:21:07,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:21:07,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:21:07,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:21:07,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:21:07,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:21:07,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:21:07,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:21:07,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:21:07,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:21:07,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:21:07,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:21:07,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:21:07,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:21:07,436 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 02:21:07,479 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:21:07,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:21:07,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:21:07,482 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:21:07,482 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:21:07,482 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:21:07,483 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:21:07,483 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:21:07,483 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:21:07,483 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:21:07,485 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:21:07,485 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:21:07,485 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:21:07,485 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:21:07,486 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:21:07,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:21:07,487 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:21:07,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:21:07,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:21:07,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:21:07,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:21:07,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:21:07,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:21:07,489 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:21:07,489 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:21:07,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:21:07,489 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:21:07,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:21:07,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:21:07,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:21:07,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:21:07,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:21:07,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:21:07,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:21:07,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:21:07,494 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:21:07,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:21:07,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:21:07,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:21:07,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:21:07,495 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_34bcff39-d367-46df-9613-8386951a9b2a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-11-30 02:21:07,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:21:07,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:21:07,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:21:07,842 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:21:07,843 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:21:07,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-30 02:21:07,937 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/data/66fb24557/a292942e83eb426bbd62d66c9e2a4715/FLAGed5a9d3b1 [2020-11-30 02:21:08,577 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:21:08,578 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-30 02:21:08,586 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/data/66fb24557/a292942e83eb426bbd62d66c9e2a4715/FLAGed5a9d3b1 [2020-11-30 02:21:08,960 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/data/66fb24557/a292942e83eb426bbd62d66c9e2a4715 [2020-11-30 02:21:08,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:21:08,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:21:08,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:21:08,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:21:08,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:21:08,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:21:08" (1/1) ... [2020-11-30 02:21:08,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ce2d0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:08, skipping insertion in model container [2020-11-30 02:21:08,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:21:08" (1/1) ... [2020-11-30 02:21:08,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:21:09,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:21:09,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:21:09,325 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:21:09,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:21:09,396 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:21:09,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:09 WrapperNode [2020-11-30 02:21:09,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:21:09,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:21:09,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:21:09,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:21:09,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:09" (1/1) ... [2020-11-30 02:21:09,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:09" (1/1) ... [2020-11-30 02:21:09,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:21:09,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:21:09,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:21:09,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:21:09,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:09" (1/1) ... [2020-11-30 02:21:09,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:09" (1/1) ... [2020-11-30 02:21:09,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:09" (1/1) ... [2020-11-30 02:21:09,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:09" (1/1) ... [2020-11-30 02:21:09,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:09" (1/1) ... [2020-11-30 02:21:09,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:09" (1/1) ... [2020-11-30 02:21:09,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:09" (1/1) ... [2020-11-30 02:21:09,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:21:09,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:21:09,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:21:09,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:21:09,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:21:09,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 02:21:09,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:21:09,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-30 02:21:09,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 02:21:09,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-30 02:21:09,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:21:09,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:21:09,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 02:21:09,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:21:10,556 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:21:10,556 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-30 02:21:10,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:21:10 BoogieIcfgContainer [2020-11-30 02:21:10,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:21:10,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:21:10,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:21:10,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:21:10,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:21:08" (1/3) ... [2020-11-30 02:21:10,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a6bfe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:21:10, skipping insertion in model container [2020-11-30 02:21:10,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:09" (2/3) ... [2020-11-30 02:21:10,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a6bfe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:21:10, skipping insertion in model container [2020-11-30 02:21:10,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:21:10" (3/3) ... [2020-11-30 02:21:10,569 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-11-30 02:21:10,582 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:21:10,587 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 02:21:10,602 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 02:21:10,630 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:21:10,630 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:21:10,630 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:21:10,631 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:21:10,631 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:21:10,631 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:21:10,631 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:21:10,631 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:21:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-11-30 02:21:10,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 02:21:10,651 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:21:10,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 02:21:10,652 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:21:10,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:21:10,662 INFO L82 PathProgramCache]: Analyzing trace with hash 73710, now seen corresponding path program 1 times [2020-11-30 02:21:10,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:21:10,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657514822] [2020-11-30 02:21:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:21:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:21:10,926 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:21:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:21:11,003 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:21:11,033 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 02:21:11,034 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 02:21:11,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:21:11,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:21:11 BoogieIcfgContainer [2020-11-30 02:21:11,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:21:11,078 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:21:11,078 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:21:11,079 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:21:11,080 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:21:10" (3/4) ... [2020-11-30 02:21:11,085 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 02:21:11,086 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:21:11,091 INFO L168 Benchmark]: Toolchain (without parser) took 2120.78 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 46.6 MB in the beginning and 65.9 MB in the end (delta: -19.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:21:11,093 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 77.6 MB. Free memory was 48.4 MB in the beginning and 48.4 MB in the end (delta: 27.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:21:11,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 426.72 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 46.4 MB in the beginning and 69.8 MB in the end (delta: -23.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-30 02:21:11,097 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.38 ms. Allocated memory is still 94.4 MB. Free memory was 69.8 MB in the beginning and 68.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:21:11,098 INFO L168 Benchmark]: Boogie Preprocessor took 66.87 ms. Allocated memory is still 94.4 MB. Free memory was 68.0 MB in the beginning and 66.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:21:11,099 INFO L168 Benchmark]: RCFGBuilder took 1043.08 ms. Allocated memory is still 94.4 MB. Free memory was 66.9 MB in the beginning and 54.4 MB in the end (delta: 12.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:21:11,101 INFO L168 Benchmark]: TraceAbstraction took 515.42 ms. Allocated memory is still 94.4 MB. Free memory was 53.7 MB in the beginning and 66.5 MB in the end (delta: -12.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:21:11,101 INFO L168 Benchmark]: Witness Printer took 8.09 ms. Allocated memory is still 94.4 MB. Free memory was 66.5 MB in the beginning and 65.9 MB in the end (delta: 539.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:21:11,113 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 77.6 MB. Free memory was 48.4 MB in the beginning and 48.4 MB in the end (delta: 27.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 426.72 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 46.4 MB in the beginning and 69.8 MB in the end (delta: -23.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.38 ms. Allocated memory is still 94.4 MB. Free memory was 69.8 MB in the beginning and 68.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 66.87 ms. Allocated memory is still 94.4 MB. Free memory was 68.0 MB in the beginning and 66.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1043.08 ms. Allocated memory is still 94.4 MB. Free memory was 66.9 MB in the beginning and 54.4 MB in the end (delta: 12.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 515.42 ms. Allocated memory is still 94.4 MB. Free memory was 53.7 MB in the beginning and 66.5 MB in the end (delta: -12.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 8.09 ms. Allocated memory is still 94.4 MB. Free memory was 66.5 MB in the beginning and 65.9 MB in the end (delta: 539.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 38, overapproximation of someUnaryDOUBLEoperation at line 20, overapproximation of someBinaryArithmeticDOUBLEoperation at line 39, overapproximation of bitwiseAnd at line 37, overapproximation of someBinaryDOUBLEComparisonOperation at line 61. Possible FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L12] COND FALSE !(!cond) [L31] union u x; [L32] double r; [L33] int exp; [L35] x.d = a [L37] EXPR x.i[0] [L37] exp = (x.i[0] & 0x7FF00000) >> 20 [L38] EXPR x.i[0] [L38] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L39] EXPR x.d [L39] r = x.d * 0.5 [L41] r = C1+C2+(C3+(C4+C5*r)*r)*r [L43] COND FALSE !(exp % 2 == 0) [L47] r = r * C0 [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] r = r * x.d [L53] return r; [L53] return r; [L63] y = sqrt_custom(x) [L14] COND TRUE !(cond) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L3] __assert_fail("0", "sqrt_poly2.c", 3, "reach_error") VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:21:14,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:21:14,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:21:14,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:21:14,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:21:14,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:21:14,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:21:14,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:21:14,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:21:14,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:21:14,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:21:14,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:21:14,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:21:14,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:21:14,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:21:14,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:21:14,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:21:14,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:21:14,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:21:14,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:21:14,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:21:14,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:21:14,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:21:14,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:21:14,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:21:14,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:21:14,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:21:14,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:21:14,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:21:14,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:21:14,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:21:14,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:21:14,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:21:14,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:21:14,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:21:14,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:21:14,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:21:14,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:21:14,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:21:14,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:21:14,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:21:14,402 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-30 02:21:14,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:21:14,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:21:14,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:21:14,462 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:21:14,462 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:21:14,462 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:21:14,463 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:21:14,463 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:21:14,463 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:21:14,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:21:14,464 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:21:14,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:21:14,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:21:14,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:21:14,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:21:14,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:21:14,466 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:21:14,466 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 02:21:14,466 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 02:21:14,467 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:21:14,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:21:14,467 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:21:14,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:21:14,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:21:14,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 02:21:14,468 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:21:14,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:21:14,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:21:14,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:21:14,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:21:14,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:21:14,470 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-30 02:21:14,470 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 02:21:14,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:21:14,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:21:14,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:21:14,471 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_34bcff39-d367-46df-9613-8386951a9b2a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-11-30 02:21:14,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:21:15,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:21:15,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:21:15,013 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:21:15,014 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:21:15,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/../../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-30 02:21:15,121 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/data/0d41402ba/f6b1197981c84dd28571ef944d535600/FLAG81315d5b3 [2020-11-30 02:21:15,887 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:21:15,888 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-11-30 02:21:15,895 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/data/0d41402ba/f6b1197981c84dd28571ef944d535600/FLAG81315d5b3 [2020-11-30 02:21:16,213 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/data/0d41402ba/f6b1197981c84dd28571ef944d535600 [2020-11-30 02:21:16,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:21:16,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:21:16,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:21:16,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:21:16,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:21:16,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:21:16" (1/1) ... [2020-11-30 02:21:16,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1806ec53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:16, skipping insertion in model container [2020-11-30 02:21:16,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:21:16" (1/1) ... [2020-11-30 02:21:16,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:21:16,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:21:16,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:21:16,509 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:21:16,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:21:16,593 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:21:16,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:16 WrapperNode [2020-11-30 02:21:16,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:21:16,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:21:16,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:21:16,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:21:16,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:16" (1/1) ... [2020-11-30 02:21:16,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:16" (1/1) ... [2020-11-30 02:21:16,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:21:16,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:21:16,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:21:16,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:21:16,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:16" (1/1) ... [2020-11-30 02:21:16,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:16" (1/1) ... [2020-11-30 02:21:16,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:16" (1/1) ... [2020-11-30 02:21:16,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:16" (1/1) ... [2020-11-30 02:21:16,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:16" (1/1) ... [2020-11-30 02:21:16,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:16" (1/1) ... [2020-11-30 02:21:16,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:16" (1/1) ... [2020-11-30 02:21:16,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:21:16,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:21:16,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:21:16,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:21:16,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:21:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-11-30 02:21:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-11-30 02:21:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-30 02:21:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:21:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-30 02:21:16,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:21:16,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:21:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:21:16,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-11-30 02:21:20,366 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:21:20,367 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-30 02:21:20,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:21:20 BoogieIcfgContainer [2020-11-30 02:21:20,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:21:20,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:21:20,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:21:20,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:21:20,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:21:16" (1/3) ... [2020-11-30 02:21:20,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432f7a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:21:20, skipping insertion in model container [2020-11-30 02:21:20,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:21:16" (2/3) ... [2020-11-30 02:21:20,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432f7a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:21:20, skipping insertion in model container [2020-11-30 02:21:20,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:21:20" (3/3) ... [2020-11-30 02:21:20,381 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-11-30 02:21:20,395 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:21:20,400 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 02:21:20,415 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 02:21:20,445 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:21:20,446 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:21:20,446 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:21:20,446 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:21:20,446 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:21:20,447 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:21:20,447 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:21:20,447 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:21:20,462 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-30 02:21:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:21:20,468 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:21:20,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:21:20,469 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:21:20,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:21:20,477 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-11-30 02:21:20,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:21:20,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510104033] [2020-11-30 02:21:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-30 02:21:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:21:22,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-30 02:21:22,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:21:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:21:22,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:21:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:21:22,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510104033] [2020-11-30 02:21:22,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:21:22,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 02:21:22,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773561778] [2020-11-30 02:21:22,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 02:21:22,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:21:22,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 02:21:22,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:21:22,368 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-11-30 02:21:22,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:21:22,386 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-30 02:21:22,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:21:22,388 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-30 02:21:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:21:22,397 INFO L225 Difference]: With dead ends: 26 [2020-11-30 02:21:22,398 INFO L226 Difference]: Without dead ends: 10 [2020-11-30 02:21:22,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:21:22,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-30 02:21:22,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-30 02:21:22,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-30 02:21:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-30 02:21:22,433 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-11-30 02:21:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:21:22,434 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-30 02:21:22,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 02:21:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-30 02:21:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:21:22,435 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:21:22,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:21:22,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 02:21:22,648 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:21:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:21:22,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-11-30 02:21:22,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:21:22,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849742647] [2020-11-30 02:21:22,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-30 02:21:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:21:24,693 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:21:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:21:26,828 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:21:27,024 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-30 02:21:27,025 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 02:21:27,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 02:21:27,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:21:27 BoogieIcfgContainer [2020-11-30 02:21:27,292 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:21:27,293 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:21:27,293 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:21:27,294 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:21:27,294 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:21:20" (3/4) ... [2020-11-30 02:21:27,297 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 02:21:27,408 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_34bcff39-d367-46df-9613-8386951a9b2a/bin/utaipan/witness.graphml [2020-11-30 02:21:27,410 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:21:27,413 INFO L168 Benchmark]: Toolchain (without parser) took 11192.96 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 40.3 MB in the beginning and 39.5 MB in the end (delta: 775.5 kB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. [2020-11-30 02:21:27,414 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 60.8 MB. Free memory is still 42.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:21:27,415 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.03 ms. Allocated memory is still 60.8 MB. Free memory was 40.1 MB in the beginning and 41.5 MB in the end (delta: -1.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:21:27,415 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.90 ms. Allocated memory is still 60.8 MB. Free memory was 41.5 MB in the beginning and 39.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:21:27,416 INFO L168 Benchmark]: Boogie Preprocessor took 42.10 ms. Allocated memory is still 60.8 MB. Free memory was 39.9 MB in the beginning and 38.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:21:27,418 INFO L168 Benchmark]: RCFGBuilder took 3681.78 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 38.3 MB in the beginning and 54.6 MB in the end (delta: -16.3 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2020-11-30 02:21:27,419 INFO L168 Benchmark]: TraceAbstraction took 6920.78 ms. Allocated memory is still 75.5 MB. Free memory was 54.3 MB in the beginning and 42.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 15.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:21:27,420 INFO L168 Benchmark]: Witness Printer took 117.13 ms. Allocated memory is still 75.5 MB. Free memory was 42.1 MB in the beginning and 39.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:21:27,426 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 60.8 MB. Free memory is still 42.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 371.03 ms. Allocated memory is still 60.8 MB. Free memory was 40.1 MB in the beginning and 41.5 MB in the end (delta: -1.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.90 ms. Allocated memory is still 60.8 MB. Free memory was 41.5 MB in the beginning and 39.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.10 ms. Allocated memory is still 60.8 MB. Free memory was 39.9 MB in the beginning and 38.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3681.78 ms. Allocated memory was 60.8 MB in the beginning and 75.5 MB in the end (delta: 14.7 MB). Free memory was 38.3 MB in the beginning and 54.6 MB in the end (delta: -16.3 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6920.78 ms. Allocated memory is still 75.5 MB. Free memory was 54.3 MB in the beginning and 42.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 15.6 MB. Max. memory is 16.1 GB. * Witness Printer took 117.13 ms. Allocated memory is still 75.5 MB. Free memory was 42.1 MB in the beginning and 39.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L12] COND FALSE !(!cond) VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L31] union u x; [L32] double r; [L33] int exp; [L35] x.d = a [L37] EXPR x.i[0] [L37] exp = (x.i[0] & 0x7FF00000) >> 20 [L38] EXPR x.i[0] [L38] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L39] EXPR x.d [L39] r = x.d * 0.5 [L41] r = C1+C2+(C3+(C4+C5*r)*r)*r VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L43] COND TRUE exp % 2 == 0 [L44] exp++ VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] r = r * x.d [L53] return r; [L53] return r; VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L63] y = sqrt_custom(x) [L14] COND TRUE !(cond) VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] [L3] __assert_fail("0", "sqrt_poly2.c", 3, "reach_error") VAL [C0=1.414213538, C1=0.229761391, C2=1.296735525, C3=-0.90109837, C4=0.4935534, C5=-0.118958666] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 128 SizeOfPredicates, 0 NumberOfNonLiveVariables, 58 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...