./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2880296f Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --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=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --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 0.2.0-2880296 [2020-12-02 14:54:09,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 14:54:09,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 14:54:09,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 14:54:09,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 14:54:09,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 14:54:09,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 14:54:09,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 14:54:09,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 14:54:09,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 14:54:09,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 14:54:09,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 14:54:09,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 14:54:09,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 14:54:09,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 14:54:09,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 14:54:09,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 14:54:09,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 14:54:09,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 14:54:09,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 14:54:09,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 14:54:09,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 14:54:09,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 14:54:09,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 14:54:09,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 14:54:09,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 14:54:09,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 14:54:09,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 14:54:09,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 14:54:09,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 14:54:09,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 14:54:09,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 14:54:09,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 14:54:09,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 14:54:09,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 14:54:09,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 14:54:09,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 14:54:09,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 14:54:09,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 14:54:09,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 14:54:09,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 14:54:09,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-02 14:54:09,232 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 14:54:09,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 14:54:09,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 14:54:09,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 14:54:09,237 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 14:54:09,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 14:54:09,238 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 14:54:09,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-02 14:54:09,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 14:54:09,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 14:54:09,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 14:54:09,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 14:54:09,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 14:54:09,240 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 14:54:09,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 14:54:09,241 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 14:54:09,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 14:54:09,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 14:54:09,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 14:54:09,242 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 14:54:09,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 14:54:09,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 14:54:09,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 14:54:09,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 14:54:09,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 14:54:09,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-02 14:54:09,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-02 14:54:09,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 14:54:09,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 14:54:09,245 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-12-02 14:54:09,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 14:54:09,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 14:54:09,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 14:54:09,722 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 14:54:09,724 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 14:54:09,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-12-02 14:54:09,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c791f89f/96e9b30c69af455cbbc4e4e8cc13b2df/FLAGf9c4630ef [2020-12-02 14:54:10,424 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 14:54:10,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-12-02 14:54:10,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c791f89f/96e9b30c69af455cbbc4e4e8cc13b2df/FLAGf9c4630ef [2020-12-02 14:54:10,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c791f89f/96e9b30c69af455cbbc4e4e8cc13b2df [2020-12-02 14:54:10,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 14:54:10,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 14:54:10,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 14:54:10,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 14:54:10,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 14:54:10,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:54:10" (1/1) ... [2020-12-02 14:54:10,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@293e6b7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:10, skipping insertion in model container [2020-12-02 14:54:10,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:54:10" (1/1) ... [2020-12-02 14:54:10,733 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 14:54:10,757 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 14:54:10,920 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c[587,600] [2020-12-02 14:54:10,950 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:54:10,961 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 14:54:10,995 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c[587,600] [2020-12-02 14:54:11,040 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:54:11,062 INFO L217 MainTranslator]: Completed translation [2020-12-02 14:54:11,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:11 WrapperNode [2020-12-02 14:54:11,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 14:54:11,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 14:54:11,065 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 14:54:11,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 14:54:11,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:11" (1/1) ... [2020-12-02 14:54:11,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:11" (1/1) ... [2020-12-02 14:54:11,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 14:54:11,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 14:54:11,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 14:54:11,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 14:54:11,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:11" (1/1) ... [2020-12-02 14:54:11,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:11" (1/1) ... [2020-12-02 14:54:11,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:11" (1/1) ... [2020-12-02 14:54:11,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:11" (1/1) ... [2020-12-02 14:54:11,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:11" (1/1) ... [2020-12-02 14:54:11,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:11" (1/1) ... [2020-12-02 14:54:11,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:11" (1/1) ... [2020-12-02 14:54:11,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 14:54:11,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 14:54:11,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 14:54:11,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 14:54:11,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-12-02 14:54:11,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-02 14:54:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 14:54:11,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-12-02 14:54:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-02 14:54:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-02 14:54:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 14:54:11,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 14:54:11,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-02 14:54:11,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 14:54:11,731 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 14:54:11,732 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-02 14:54:11,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:54:11 BoogieIcfgContainer [2020-12-02 14:54:11,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 14:54:11,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 14:54:11,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 14:54:11,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 14:54:11,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:54:10" (1/3) ... [2020-12-02 14:54:11,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b8ab62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:54:11, skipping insertion in model container [2020-12-02 14:54:11,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:11" (2/3) ... [2020-12-02 14:54:11,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b8ab62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:54:11, skipping insertion in model container [2020-12-02 14:54:11,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:54:11" (3/3) ... [2020-12-02 14:54:11,750 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-12-02 14:54:11,773 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 14:54:11,777 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 14:54:11,792 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 14:54:11,844 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 14:54:11,844 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 14:54:11,844 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 14:54:11,845 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 14:54:11,845 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 14:54:11,845 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 14:54:11,845 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 14:54:11,846 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 14:54:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-02 14:54:11,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-02 14:54:11,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:54:11,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 14:54:11,875 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:54:11,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:54:11,900 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-12-02 14:54:11,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:54:11,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354494885] [2020-12-02 14:54:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:54:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:54:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:54:12,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354494885] [2020-12-02 14:54:12,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 14:54:12,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 14:54:12,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126782592] [2020-12-02 14:54:12,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 14:54:12,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:54:12,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 14:54:12,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 14:54:12,166 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-12-02 14:54:12,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:54:12,185 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-02 14:54:12,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 14:54:12,187 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-02 14:54:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:54:12,197 INFO L225 Difference]: With dead ends: 25 [2020-12-02 14:54:12,198 INFO L226 Difference]: Without dead ends: 10 [2020-12-02 14:54:12,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 14:54:12,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-02 14:54:12,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-02 14:54:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-02 14:54:12,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-02 14:54:12,242 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-12-02 14:54:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:54:12,242 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-02 14:54:12,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 14:54:12,243 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-02 14:54:12,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-02 14:54:12,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:54:12,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 14:54:12,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-02 14:54:12,245 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:54:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:54:12,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-12-02 14:54:12,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:54:12,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273858424] [2020-12-02 14:54:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:54:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 14:54:12,312 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 14:54:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 14:54:12,390 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 14:54:12,463 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-02 14:54:12,464 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 14:54:12,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-02 14:54:12,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:54:12 BoogieIcfgContainer [2020-12-02 14:54:12,521 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 14:54:12,523 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 14:54:12,523 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 14:54:12,523 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 14:54:12,524 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:54:11" (3/4) ... [2020-12-02 14:54:12,529 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-02 14:54:12,529 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 14:54:12,536 INFO L168 Benchmark]: Toolchain (without parser) took 1818.57 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 32.3 MB in the beginning and 39.9 MB in the end (delta: -7.6 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2020-12-02 14:54:12,538 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 35.7 MB. Free memory was 19.7 MB in the beginning and 19.6 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:54:12,540 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.63 ms. Allocated memory is still 50.3 MB. Free memory was 32.0 MB in the beginning and 33.0 MB in the end (delta: -954.1 kB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. [2020-12-02 14:54:12,541 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.11 ms. Allocated memory is still 50.3 MB. Free memory was 32.8 MB in the beginning and 31.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:54:12,542 INFO L168 Benchmark]: Boogie Preprocessor took 34.31 ms. Allocated memory is still 50.3 MB. Free memory was 31.1 MB in the beginning and 30.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:54:12,545 INFO L168 Benchmark]: RCFGBuilder took 587.06 ms. Allocated memory is still 50.3 MB. Free memory was 29.8 MB in the beginning and 25.6 MB in the end (delta: 4.1 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. [2020-12-02 14:54:12,547 INFO L168 Benchmark]: TraceAbstraction took 781.24 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 25.2 MB in the beginning and 40.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-12-02 14:54:12,548 INFO L168 Benchmark]: Witness Printer took 7.03 ms. Allocated memory is still 60.8 MB. Free memory is still 39.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:54:12,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 35.7 MB. Free memory was 19.7 MB in the beginning and 19.6 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 349.63 ms. Allocated memory is still 50.3 MB. Free memory was 32.0 MB in the beginning and 33.0 MB in the end (delta: -954.1 kB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.11 ms. Allocated memory is still 50.3 MB. Free memory was 32.8 MB in the beginning and 31.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.31 ms. Allocated memory is still 50.3 MB. Free memory was 31.1 MB in the beginning and 30.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 587.06 ms. Allocated memory is still 50.3 MB. Free memory was 29.8 MB in the beginning and 25.6 MB in the end (delta: 4.1 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 781.24 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 25.2 MB in the beginning and 40.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * Witness Printer took 7.03 ms. Allocated memory is still 60.8 MB. Free memory is still 39.9 MB. 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 someUnaryDOUBLE_SMToperation at line 20, overapproximation of bitwiseOr at line 38, overapproximation of bitwiseAnd at line 37, overapproximation of someBinaryArithmeticDOUBLE_SMToperation at line 51, overapproximation of someBinaryDOUBLE_SMTComparisonOperation at line 65. 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; VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L12] COND FALSE !(!cond) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [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=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L43] COND TRUE exp % 2 == 0 [L44] exp++ VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [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=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [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, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, 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, 2 GetRequests, 2 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 64 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-2880296 [2020-12-02 14:54:15,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 14:54:15,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 14:54:15,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 14:54:15,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 14:54:15,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 14:54:15,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 14:54:15,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 14:54:15,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 14:54:15,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 14:54:15,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 14:54:15,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 14:54:15,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 14:54:15,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 14:54:15,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 14:54:15,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 14:54:15,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 14:54:15,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 14:54:15,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 14:54:15,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 14:54:15,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 14:54:15,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 14:54:15,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 14:54:15,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 14:54:15,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 14:54:15,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 14:54:15,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 14:54:15,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 14:54:15,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 14:54:15,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 14:54:15,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 14:54:15,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 14:54:15,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 14:54:15,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 14:54:15,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 14:54:15,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 14:54:15,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 14:54:15,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 14:54:15,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 14:54:15,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 14:54:15,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 14:54:15,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-02 14:54:15,627 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 14:54:15,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 14:54:15,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 14:54:15,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 14:54:15,630 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 14:54:15,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 14:54:15,630 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 14:54:15,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 14:54:15,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 14:54:15,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 14:54:15,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 14:54:15,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 14:54:15,632 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-02 14:54:15,633 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-02 14:54:15,633 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 14:54:15,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 14:54:15,634 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 14:54:15,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 14:54:15,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 14:54:15,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 14:54:15,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 14:54:15,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 14:54:15,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 14:54:15,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 14:54:15,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 14:54:15,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 14:54:15,637 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-02 14:54:15,637 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-02 14:54:15,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 14:54:15,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 14:54:15,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-02 14:54:15,639 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d97d268d682e2021ff98bdbb1deaf100696d038 [2020-12-02 14:54:16,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 14:54:16,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 14:54:16,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 14:54:16,126 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 14:54:16,126 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 14:54:16,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-12-02 14:54:16,223 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b31c4b3/2711d299586142fd96909180756d8e1f/FLAG225cada7e [2020-12-02 14:54:16,900 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 14:54:16,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-12-02 14:54:16,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b31c4b3/2711d299586142fd96909180756d8e1f/FLAG225cada7e [2020-12-02 14:54:17,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7b31c4b3/2711d299586142fd96909180756d8e1f [2020-12-02 14:54:17,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 14:54:17,269 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 14:54:17,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 14:54:17,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 14:54:17,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 14:54:17,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:54:17" (1/1) ... [2020-12-02 14:54:17,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ddc6d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:17, skipping insertion in model container [2020-12-02 14:54:17,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:54:17" (1/1) ... [2020-12-02 14:54:17,290 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 14:54:17,309 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 14:54:17,533 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c[587,600] [2020-12-02 14:54:17,571 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:54:17,588 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 14:54:17,603 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c[587,600] [2020-12-02 14:54:17,625 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:54:17,650 INFO L217 MainTranslator]: Completed translation [2020-12-02 14:54:17,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:17 WrapperNode [2020-12-02 14:54:17,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 14:54:17,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 14:54:17,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 14:54:17,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 14:54:17,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:17" (1/1) ... [2020-12-02 14:54:17,676 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:17" (1/1) ... [2020-12-02 14:54:17,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 14:54:17,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 14:54:17,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 14:54:17,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 14:54:17,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:17" (1/1) ... [2020-12-02 14:54:17,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:17" (1/1) ... [2020-12-02 14:54:17,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:17" (1/1) ... [2020-12-02 14:54:17,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:17" (1/1) ... [2020-12-02 14:54:17,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:17" (1/1) ... [2020-12-02 14:54:17,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:17" (1/1) ... [2020-12-02 14:54:17,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:17" (1/1) ... [2020-12-02 14:54:17,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 14:54:17,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 14:54:17,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 14:54:17,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 14:54:17,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-12-02 14:54:17,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_DOUBLE [2020-12-02 14:54:17,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-12-02 14:54:17,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-12-02 14:54:17,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-02 14:54:17,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 14:54:17,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-02 14:54:17,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 14:54:17,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 14:54:17,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 14:54:17,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-02 14:54:24,782 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 14:54:24,783 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-02 14:54:24,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:54:24 BoogieIcfgContainer [2020-12-02 14:54:24,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 14:54:24,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 14:54:24,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 14:54:24,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 14:54:24,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:54:17" (1/3) ... [2020-12-02 14:54:24,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56074832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:54:24, skipping insertion in model container [2020-12-02 14:54:24,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:54:17" (2/3) ... [2020-12-02 14:54:24,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56074832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:54:24, skipping insertion in model container [2020-12-02 14:54:24,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:54:24" (3/3) ... [2020-12-02 14:54:24,796 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-12-02 14:54:24,812 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 14:54:24,817 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 14:54:24,831 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 14:54:24,866 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 14:54:24,867 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 14:54:24,867 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 14:54:24,867 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 14:54:24,868 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 14:54:24,868 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 14:54:24,868 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 14:54:24,868 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 14:54:24,884 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-02 14:54:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-02 14:54:24,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:54:24,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 14:54:24,891 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:54:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:54:24,899 INFO L82 PathProgramCache]: Analyzing trace with hash -145167152, now seen corresponding path program 1 times [2020-12-02 14:54:24,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 14:54:24,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837659386] [2020-12-02 14:54:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-12-02 14:54:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:54:26,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-02 14:54:26,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:54:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:54:26,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 14:54:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:54:26,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837659386] [2020-12-02 14:54:26,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 14:54:26,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-02 14:54:26,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690793347] [2020-12-02 14:54:26,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 14:54:26,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 14:54:26,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 14:54:26,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 14:54:26,623 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-02 14:54:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:54:26,643 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-12-02 14:54:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 14:54:26,645 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-12-02 14:54:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:54:26,654 INFO L225 Difference]: With dead ends: 31 [2020-12-02 14:54:26,655 INFO L226 Difference]: Without dead ends: 14 [2020-12-02 14:54:26,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 14:54:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-02 14:54:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-02 14:54:26,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-02 14:54:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-02 14:54:26,698 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 13 [2020-12-02 14:54:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:54:26,699 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-02 14:54:26,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 14:54:26,699 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-02 14:54:26,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-02 14:54:26,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:54:26,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 14:54:26,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-02 14:54:26,914 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:54:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:54:26,917 INFO L82 PathProgramCache]: Analyzing trace with hash 534891218, now seen corresponding path program 1 times [2020-12-02 14:54:26,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 14:54:26,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961746342] [2020-12-02 14:54:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-12-02 14:54:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 14:54:28,830 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 14:54:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 14:54:30,657 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 14:54:30,869 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-02 14:54:30,870 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 14:54:31,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-02 14:54:31,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:54:31 BoogieIcfgContainer [2020-12-02 14:54:31,138 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 14:54:31,140 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 14:54:31,140 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 14:54:31,140 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 14:54:31,141 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:54:24" (3/4) ... [2020-12-02 14:54:31,145 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-02 14:54:31,214 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-02 14:54:31,214 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 14:54:31,218 INFO L168 Benchmark]: Toolchain (without parser) took 13947.79 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.4 MB in the beginning and 21.2 MB in the end (delta: 133.7 kB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2020-12-02 14:54:31,219 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 44.0 MB. Free memory was 29.1 MB in the beginning and 29.0 MB in the end (delta: 32.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:54:31,220 INFO L168 Benchmark]: CACSL2BoogieTranslator took 380.76 ms. Allocated memory is still 44.0 MB. Free memory was 21.2 MB in the beginning and 22.3 MB in the end (delta: -1.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-12-02 14:54:31,221 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.37 ms. Allocated memory is still 44.0 MB. Free memory was 22.2 MB in the beginning and 20.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:54:31,222 INFO L168 Benchmark]: Boogie Preprocessor took 47.01 ms. Allocated memory is still 44.0 MB. Free memory was 20.2 MB in the beginning and 18.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:54:31,223 INFO L168 Benchmark]: RCFGBuilder took 7026.03 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 18.6 MB in the beginning and 26.7 MB in the end (delta: -8.1 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2020-12-02 14:54:31,224 INFO L168 Benchmark]: TraceAbstraction took 6350.59 ms. Allocated memory is still 54.5 MB. Free memory was 26.2 MB in the beginning and 24.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 1.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:54:31,225 INFO L168 Benchmark]: Witness Printer took 75.16 ms. Allocated memory is still 54.5 MB. Free memory was 23.9 MB in the beginning and 21.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:54:31,231 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 44.0 MB. Free memory was 29.1 MB in the beginning and 29.0 MB in the end (delta: 32.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 380.76 ms. Allocated memory is still 44.0 MB. Free memory was 21.2 MB in the beginning and 22.3 MB in the end (delta: -1.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.37 ms. Allocated memory is still 44.0 MB. Free memory was 22.2 MB in the beginning and 20.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.01 ms. Allocated memory is still 44.0 MB. Free memory was 20.2 MB in the beginning and 18.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 7026.03 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 18.6 MB in the beginning and 26.7 MB in the end (delta: -8.1 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6350.59 ms. Allocated memory is still 54.5 MB. Free memory was 26.2 MB in the beginning and 24.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 1.1 MB. Max. memory is 16.1 GB. * Witness Printer took 75.16 ms. Allocated memory is still 54.5 MB. Free memory was 23.9 MB in the beginning and 21.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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] EXPR 1.414213538 [L17] double C0 = 1.414213538; [L17] 1.414213538 [L18] EXPR 0.229761391 [L18] double C1 = 0.229761391; [L18] 0.229761391 [L19] EXPR 1.296735525 [L19] double C2 = 1.296735525; [L19] 1.296735525 [L20] EXPR 0.901098370 [L20] EXPR -0.901098370 [L20] double C3 = -0.901098370; [L20] EXPR 0.901098370 [L20] -0.901098370 [L21] EXPR 0.493553400 [L21] double C4 = 0.493553400; [L21] 0.493553400 [L22] EXPR 0.118958666 [L22] EXPR -0.118958666 [L22] double C5 = -0.118958666; [L22] -0.118958666 [L22] 0.118958666 VAL [C0=4609047870735406023, C1=4597446046809669239, C2=4608518796799834997, C3=-4617080444742787069, C4=4602562687551215685, C5=-4630135740929689419] [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L61] EXPR 1. [L61] x >= 1. && x <= 1e10 [L61] EXPR 1e10 [L61] x >= 1. && x <= 1e10 VAL [C0=4609047870735406023, C1=4597446046809669239, C2=4608518796799834997, C3=-4617080444742787069, C4=4602562687551215685, C5=-4630135740929689419] [L12] COND FALSE !(!cond) VAL [C0=4609047870735406023, C1=4597446046809669239, C2=4608518796799834997, C3=-4617080444742787069, C4=4602562687551215685, C5=-4630135740929689419] [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] EXPR 0.5 [L39] EXPR x.d * 0.5 [L39] r = x.d * 0.5 [L41] EXPR C1+C2 [L41] EXPR C5*r [L41] EXPR C4+C5*r [L41] EXPR (C4+C5*r)*r [L41] EXPR C3+(C4+C5*r)*r [L41] EXPR (C3+(C4+C5*r)*r)*r [L41] EXPR C1+C2+(C3+(C4+C5*r)*r)*r [L41] r = C1+C2+(C3+(C4+C5*r)*r)*r [L43] COND TRUE exp % 2 == 0 [L44] exp++ VAL [C0=4609047870735406023, C1=4597446046809669239, C2=4608518796799834997, C3=-4617080444742787069, C4=4602562687551215685, C5=-4630135740929689419] [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] EXPR r * x.d [L51] r = r * x.d [L53] return r; [L53] return r; VAL [C0=4609047870735406023, C1=4597446046809669239, C2=4608518796799834997, C3=-4617080444742787069, C4=4602562687551215685, C5=-4630135740929689419] [L63] y = sqrt_custom(x) [L65] EXPR 0. [L65] y >= 0. && y <= 1e6 [L65] EXPR 1e6 [L65] y >= 0. && y <= 1e6 VAL [C0=4609047870735406023, C1=4597446046809669239, C2=4608518796799834997, C3=-4617080444742787069, C4=4602562687551215685, C5=-4630135740929689419] [L14] COND TRUE !(cond) VAL [C0=4609047870735406023, C1=4597446046809669239, C2=4608518796799834997, C3=-4617080444742787069, C4=4602562687551215685, C5=-4630135740929689419] [L14] reach_error() VAL [C0=4609047870735406023, C1=4597446046809669239, C2=4608518796799834997, C3=-4617080444742787069, C4=4602562687551215685, C5=-4630135740929689419] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 3.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 288 SizeOfPredicates, 0 NumberOfNonLiveVariables, 74 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...