./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 9a8b2e8d 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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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 0.1.25-9a8b2e8 [2020-10-20 00:22:26,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:22:26,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:22:26,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:22:26,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:22:26,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:22:26,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:22:26,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:22:26,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:22:26,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:22:26,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:22:26,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:22:26,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:22:26,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:22:26,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:22:26,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:22:26,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:22:26,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:22:26,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:22:26,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:22:26,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:22:26,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:22:26,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:22:26,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:22:26,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:22:26,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:22:26,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:22:26,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:22:26,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:22:26,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:22:26,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:22:26,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:22:26,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:22:26,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:22:26,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:22:26,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:22:26,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:22:26,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:22:26,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:22:26,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:22:26,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:22:26,956 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:22:26,995 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:22:26,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:22:26,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:22:26,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:22:26,998 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:22:26,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:22:26,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:22:26,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:22:26,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:22:27,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:22:27,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:22:27,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:22:27,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:22:27,002 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:22:27,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:22:27,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:22:27,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:22:27,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:22:27,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:22:27,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:22:27,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:22:27,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:22:27,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:22:27,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:22:27,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:22:27,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:22:27,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:22:27,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:22:27,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:22:27,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 [2020-10-20 00:22:27,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:22:27,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:22:27,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:22:27,241 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:22:27,241 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:22:27,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-10-20 00:22:27,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b6378ecc/0d11fbe12087491dbe10a669aeebd5f1/FLAGfcbe487ae [2020-10-20 00:22:27,836 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:22:27,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-10-20 00:22:27,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b6378ecc/0d11fbe12087491dbe10a669aeebd5f1/FLAGfcbe487ae [2020-10-20 00:22:28,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b6378ecc/0d11fbe12087491dbe10a669aeebd5f1 [2020-10-20 00:22:28,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:22:28,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:22:28,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:22:28,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:22:28,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:22:28,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:22:28" (1/1) ... [2020-10-20 00:22:28,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d21fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:28, skipping insertion in model container [2020-10-20 00:22:28,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:22:28" (1/1) ... [2020-10-20 00:22:28,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:22:28,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:22:28,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:22:28,524 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:22:28,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:22:28,578 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:22:28,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:28 WrapperNode [2020-10-20 00:22:28,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:22:28,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:22:28,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:22:28,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:22:28,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:28" (1/1) ... [2020-10-20 00:22:28,615 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:28" (1/1) ... [2020-10-20 00:22:28,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:22:28,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:22:28,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:22:28,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:22:28,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:28" (1/1) ... [2020-10-20 00:22:28,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:28" (1/1) ... [2020-10-20 00:22:28,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:28" (1/1) ... [2020-10-20 00:22:28,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:28" (1/1) ... [2020-10-20 00:22:28,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:28" (1/1) ... [2020-10-20 00:22:28,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:28" (1/1) ... [2020-10-20 00:22:28,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:28" (1/1) ... [2020-10-20 00:22:28,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:22:28,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:22:28,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:22:28,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:22:28,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:28" (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 [2020-10-20 00:22:28,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:22:28,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:22:28,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-20 00:22:28,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:22:28,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-20 00:22:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:22:28,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:22:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:22:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:22:29,026 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:22:29,027 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-20 00:22:29,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:22:29 BoogieIcfgContainer [2020-10-20 00:22:29,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:22:29,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:22:29,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:22:29,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:22:29,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:22:28" (1/3) ... [2020-10-20 00:22:29,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39771ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:22:29, skipping insertion in model container [2020-10-20 00:22:29,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:28" (2/3) ... [2020-10-20 00:22:29,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39771ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:22:29, skipping insertion in model container [2020-10-20 00:22:29,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:22:29" (3/3) ... [2020-10-20 00:22:29,039 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-10-20 00:22:29,053 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:22:29,060 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:22:29,085 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:22:29,118 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:22:29,118 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:22:29,119 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:22:29,119 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:22:29,120 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:22:29,120 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:22:29,120 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:22:29,120 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:22:29,137 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-10-20 00:22:29,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 00:22:29,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:22:29,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:22:29,153 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:22:29,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:22:29,160 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-10-20 00:22:29,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:22:29,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922852372] [2020-10-20 00:22:29,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:22:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:22:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:22:29,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922852372] [2020-10-20 00:22:29,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:22:29,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:22:29,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437541387] [2020-10-20 00:22:29,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:22:29,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:22:29,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:22:29,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:22:29,378 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-10-20 00:22:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:22:29,397 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-20 00:22:29,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:22:29,399 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-10-20 00:22:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:22:29,409 INFO L225 Difference]: With dead ends: 26 [2020-10-20 00:22:29,410 INFO L226 Difference]: Without dead ends: 10 [2020-10-20 00:22:29,414 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 [2020-10-20 00:22:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-10-20 00:22:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-20 00:22:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 00:22:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-10-20 00:22:29,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-10-20 00:22:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:22:29,446 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-10-20 00:22:29,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:22:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-10-20 00:22:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 00:22:29,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:22:29,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:22:29,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:22:29,447 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:22:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:22:29,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-10-20 00:22:29,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:22:29,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036692715] [2020-10-20 00:22:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:22:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:22:29,538 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:22:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:22:29,581 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:22:29,622 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:22:29,622 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:22:29,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:22:29,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:22:29 BoogieIcfgContainer [2020-10-20 00:22:29,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:22:29,659 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:22:29,659 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:22:29,659 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:22:29,660 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:22:29" (3/4) ... [2020-10-20 00:22:29,664 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:22:29,664 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:22:29,673 INFO L168 Benchmark]: Toolchain (without parser) took 1419.97 ms. Allocated memory was 41.9 MB in the beginning and 45.1 MB in the end (delta: 3.1 MB). Free memory was 20.0 MB in the beginning and 19.9 MB in the end (delta: 132.1 kB). Peak memory consumption was 3.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:22:29,674 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 31.5 MB. Free memory was 8.7 MB in the beginning and 8.7 MB in the end (delta: 45.8 kB). Peak memory consumption was 45.8 kB. Max. memory is 14.3 GB. [2020-10-20 00:22:29,676 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.50 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 19.1 MB in the beginning and 19.0 MB in the end (delta: 163.1 kB). Peak memory consumption was 9.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:22:29,677 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.65 ms. Allocated memory is still 42.5 MB. Free memory was 19.0 MB in the beginning and 17.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:22:29,678 INFO L168 Benchmark]: Boogie Preprocessor took 30.22 ms. Allocated memory is still 42.5 MB. Free memory was 17.0 MB in the beginning and 15.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:22:29,679 INFO L168 Benchmark]: RCFGBuilder took 353.36 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 15.3 MB in the beginning and 15.7 MB in the end (delta: -334.0 kB). Peak memory consumption was 5.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:22:29,680 INFO L168 Benchmark]: TraceAbstraction took 627.52 ms. Allocated memory was 44.0 MB in the beginning and 45.1 MB in the end (delta: 1.0 MB). Free memory was 15.3 MB in the beginning and 20.5 MB in the end (delta: -5.2 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:22:29,681 INFO L168 Benchmark]: Witness Printer took 11.67 ms. Allocated memory is still 45.1 MB. Free memory was 20.5 MB in the beginning and 19.9 MB in the end (delta: 580.4 kB). Peak memory consumption was 580.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:22:29,686 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 31.5 MB. Free memory was 8.7 MB in the beginning and 8.7 MB in the end (delta: 45.8 kB). Peak memory consumption was 45.8 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 322.50 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 19.1 MB in the beginning and 19.0 MB in the end (delta: 163.1 kB). Peak memory consumption was 9.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 64.65 ms. Allocated memory is still 42.5 MB. Free memory was 19.0 MB in the beginning and 17.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 30.22 ms. Allocated memory is still 42.5 MB. Free memory was 17.0 MB in the beginning and 15.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 353.36 ms. Allocated memory was 42.5 MB in the beginning and 44.0 MB in the end (delta: 1.6 MB). Free memory was 15.3 MB in the beginning and 15.7 MB in the end (delta: -334.0 kB). Peak memory consumption was 5.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 627.52 ms. Allocated memory was 44.0 MB in the beginning and 45.1 MB in the end (delta: 1.0 MB). Free memory was 15.3 MB in the beginning and 20.5 MB in the end (delta: -5.2 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 11.67 ms. Allocated memory is still 45.1 MB. Free memory was 20.5 MB in the beginning and 19.9 MB in the end (delta: 580.4 kB). Peak memory consumption was 580.4 kB. Max. memory is 14.3 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 51, overapproximation of bitwiseAnd at line 37, overapproximation of someBinaryDOUBLEComparisonOperation 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] [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, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, 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=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, 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 0.1.25-9a8b2e8 [2020-10-20 00:22:31,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:22:31,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:22:31,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:22:31,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:22:31,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:22:31,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:22:31,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:22:31,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:22:31,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:22:31,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:22:31,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:22:31,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:22:31,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:22:31,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:22:31,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:22:31,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:22:31,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:22:31,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:22:31,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:22:31,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:22:31,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:22:31,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:22:31,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:22:31,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:22:31,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:22:31,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:22:31,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:22:31,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:22:31,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:22:31,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:22:31,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:22:31,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:22:31,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:22:31,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:22:31,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:22:31,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:22:31,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:22:31,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:22:31,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:22:31,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:22:31,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:22:31,942 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:22:31,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:22:31,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:22:31,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:22:31,944 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:22:31,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:22:31,945 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:22:31,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:22:31,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:22:31,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:22:31,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:22:31,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:22:31,947 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:22:31,947 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:22:31,947 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:22:31,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:22:31,948 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:22:31,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:22:31,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:22:31,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:22:31,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:22:31,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:22:31,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:22:31,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:22:31,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:22:31,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:22:31,950 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:22:31,950 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:22:31,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:22:31,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:22:31,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:22:31,951 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 [2020-10-20 00:22:32,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:22:32,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:22:32,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:22:32,179 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:22:32,180 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:22:32,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-10-20 00:22:32,258 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd576557/cbddba76768b4b369365a5a6954c83b4/FLAG8247e4385 [2020-10-20 00:22:32,691 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:22:32,692 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/sqrt_poly2.c [2020-10-20 00:22:32,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd576557/cbddba76768b4b369365a5a6954c83b4/FLAG8247e4385 [2020-10-20 00:22:33,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdd576557/cbddba76768b4b369365a5a6954c83b4 [2020-10-20 00:22:33,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:22:33,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:22:33,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:22:33,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:22:33,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:22:33,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:22:33" (1/1) ... [2020-10-20 00:22:33,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@502a0525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:33, skipping insertion in model container [2020-10-20 00:22:33,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:22:33" (1/1) ... [2020-10-20 00:22:33,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:22:33,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:22:33,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:22:33,411 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:22:33,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:22:33,472 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:22:33,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:33 WrapperNode [2020-10-20 00:22:33,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:22:33,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:22:33,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:22:33,475 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:22:33,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:33" (1/1) ... [2020-10-20 00:22:33,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:33" (1/1) ... [2020-10-20 00:22:33,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:22:33,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:22:33,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:22:33,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:22:33,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:33" (1/1) ... [2020-10-20 00:22:33,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:33" (1/1) ... [2020-10-20 00:22:33,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:33" (1/1) ... [2020-10-20 00:22:33,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:33" (1/1) ... [2020-10-20 00:22:33,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:33" (1/1) ... [2020-10-20 00:22:33,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:33" (1/1) ... [2020-10-20 00:22:33,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:33" (1/1) ... [2020-10-20 00:22:33,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:22:33,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:22:33,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:22:33,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:22:33,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:33" (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 [2020-10-20 00:22:33,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-10-20 00:22:33,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-10-20 00:22:33,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:22:33,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:22:33,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 00:22:33,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:22:33,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:22:33,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:22:33,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-20 00:22:37,455 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:22:37,455 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-20 00:22:37,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:22:37 BoogieIcfgContainer [2020-10-20 00:22:37,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:22:37,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:22:37,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:22:37,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:22:37,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:22:33" (1/3) ... [2020-10-20 00:22:37,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419663c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:22:37, skipping insertion in model container [2020-10-20 00:22:37,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:22:33" (2/3) ... [2020-10-20 00:22:37,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419663c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:22:37, skipping insertion in model container [2020-10-20 00:22:37,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:22:37" (3/3) ... [2020-10-20 00:22:37,501 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-10-20 00:22:37,540 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:22:37,554 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:22:37,571 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:22:37,596 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:22:37,596 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:22:37,597 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:22:37,597 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:22:37,597 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:22:37,598 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:22:37,598 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:22:37,598 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:22:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-10-20 00:22:37,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 00:22:37,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:22:37,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:22:37,623 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:22:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:22:37,629 INFO L82 PathProgramCache]: Analyzing trace with hash -594069783, now seen corresponding path program 1 times [2020-10-20 00:22:37,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:22:37,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94510334] [2020-10-20 00:22:37,641 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 [2020-10-20 00:22:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:22:39,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:22:39,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:22:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:22:39,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:22:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:22:39,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94510334] [2020-10-20 00:22:39,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:22:39,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:22:39,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704286934] [2020-10-20 00:22:39,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:22:39,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:22:39,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:22:39,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:22:39,099 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-10-20 00:22:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:22:39,115 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-20 00:22:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:22:39,116 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-10-20 00:22:39,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:22:39,127 INFO L225 Difference]: With dead ends: 26 [2020-10-20 00:22:39,127 INFO L226 Difference]: Without dead ends: 10 [2020-10-20 00:22:39,130 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 [2020-10-20 00:22:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-10-20 00:22:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-20 00:22:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 00:22:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-10-20 00:22:39,160 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-10-20 00:22:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:22:39,160 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-10-20 00:22:39,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:22:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-10-20 00:22:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 00:22:39,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:22:39,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:22:39,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:22:39,367 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:22:39,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:22:39,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1180937579, now seen corresponding path program 1 times [2020-10-20 00:22:39,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:22:39,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786392562] [2020-10-20 00:22:39,371 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 [2020-10-20 00:22:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:22:41,053 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:22:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:22:42,823 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:22:43,007 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-20 00:22:43,007 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:22:43,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:22:43,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:22:43 BoogieIcfgContainer [2020-10-20 00:22:43,269 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:22:43,269 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:22:43,270 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:22:43,270 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:22:43,271 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:22:37" (3/4) ... [2020-10-20 00:22:43,273 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:22:43,338 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:22:43,339 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:22:43,341 INFO L168 Benchmark]: Toolchain (without parser) took 10248.84 ms. Allocated memory was 35.1 MB in the beginning and 47.2 MB in the end (delta: 12.1 MB). Free memory was 12.6 MB in the beginning and 18.4 MB in the end (delta: -5.8 MB). Peak memory consumption was 6.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:22:43,342 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 34.1 MB. Free memory was 19.3 MB in the beginning and 19.3 MB in the end (delta: 29.1 kB). Peak memory consumption was 29.1 kB. Max. memory is 14.3 GB. [2020-10-20 00:22:43,343 INFO L168 Benchmark]: CACSL2BoogieTranslator took 375.03 ms. Allocated memory was 35.1 MB in the beginning and 43.5 MB in the end (delta: 8.4 MB). Free memory was 11.8 MB in the beginning and 21.5 MB in the end (delta: -9.8 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:22:43,344 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.17 ms. Allocated memory is still 43.5 MB. Free memory was 21.5 MB in the beginning and 19.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:22:43,344 INFO L168 Benchmark]: Boogie Preprocessor took 34.44 ms. Allocated memory is still 43.5 MB. Free memory was 19.5 MB in the beginning and 17.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:22:43,345 INFO L168 Benchmark]: RCFGBuilder took 3916.94 ms. Allocated memory was 43.5 MB in the beginning and 46.1 MB in the end (delta: 2.6 MB). Free memory was 17.6 MB in the beginning and 12.8 MB in the end (delta: 4.9 MB). Peak memory consumption was 7.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:22:43,346 INFO L168 Benchmark]: TraceAbstraction took 5790.58 ms. Allocated memory was 46.1 MB in the beginning and 47.2 MB in the end (delta: 1.0 MB). Free memory was 12.1 MB in the beginning and 21.5 MB in the end (delta: -9.4 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:22:43,347 INFO L168 Benchmark]: Witness Printer took 69.43 ms. Allocated memory is still 47.2 MB. Free memory was 21.5 MB in the beginning and 18.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:22:43,351 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 34.1 MB. Free memory was 19.3 MB in the beginning and 19.3 MB in the end (delta: 29.1 kB). Peak memory consumption was 29.1 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 375.03 ms. Allocated memory was 35.1 MB in the beginning and 43.5 MB in the end (delta: 8.4 MB). Free memory was 11.8 MB in the beginning and 21.5 MB in the end (delta: -9.8 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 48.17 ms. Allocated memory is still 43.5 MB. Free memory was 21.5 MB in the beginning and 19.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 34.44 ms. Allocated memory is still 43.5 MB. Free memory was 19.5 MB in the beginning and 17.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 3916.94 ms. Allocated memory was 43.5 MB in the beginning and 46.1 MB in the end (delta: 2.6 MB). Free memory was 17.6 MB in the beginning and 12.8 MB in the end (delta: 4.9 MB). Peak memory consumption was 7.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 5790.58 ms. Allocated memory was 46.1 MB in the beginning and 47.2 MB in the end (delta: 1.0 MB). Free memory was 12.1 MB in the beginning and 21.5 MB in the end (delta: -9.4 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 69.43 ms. Allocated memory is still 47.2 MB. Free memory was 21.5 MB in the beginning and 18.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 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: 5.6s, 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, 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, 2.8s 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...