./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/inv_sqrt_Quake.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/inv_sqrt_Quake.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 b5a9a5f04ffebcbeddfcdcc0054cf362a3fa4d7b .................................................................................................................................................................................................................................................................................... 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/inv_sqrt_Quake.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 b5a9a5f04ffebcbeddfcdcc0054cf362a3fa4d7b ...................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:20:02,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:20:02,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:20:02,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:20:02,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:20:02,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:20:02,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:20:02,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:20:02,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:20:02,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:20:02,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:20:02,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:20:02,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:20:02,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:20:02,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:20:02,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:20:02,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:20:02,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:20:02,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:20:02,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:20:02,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:20:02,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:20:02,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:20:02,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:20:02,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:20:02,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:20:02,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:20:02,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:20:02,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:20:02,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:20:02,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:20:02,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:20:02,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:20:02,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:20:02,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:20:02,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:20:02,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:20:02,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:20:02,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:20:02,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:20:02,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:20:02,279 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:20:02,324 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:20:02,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:20:02,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:20:02,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:20:02,328 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:20:02,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:20:02,328 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:20:02,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:20:02,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:20:02,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:20:02,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:20:02,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:20:02,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:20:02,331 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:20:02,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:20:02,331 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:20:02,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:20:02,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:20:02,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:20:02,332 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:20:02,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:20:02,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:20:02,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:20:02,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:20:02,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:20:02,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:20:02,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:20:02,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:20:02,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:20:02,335 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 -> b5a9a5f04ffebcbeddfcdcc0054cf362a3fa4d7b [2020-10-20 00:20:02,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:20:02,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:20:02,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:20:02,588 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:20:02,589 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:20:02,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c [2020-10-20 00:20:02,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e85b914/691c753f8e714ff184b757bbaa5fb2d4/FLAG788f2efee [2020-10-20 00:20:03,232 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:20:03,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c [2020-10-20 00:20:03,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e85b914/691c753f8e714ff184b757bbaa5fb2d4/FLAG788f2efee [2020-10-20 00:20:03,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e85b914/691c753f8e714ff184b757bbaa5fb2d4 [2020-10-20 00:20:03,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:20:03,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:20:03,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:20:03,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:20:03,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:20:03,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:20:03" (1/1) ... [2020-10-20 00:20:03,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c60c599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:03, skipping insertion in model container [2020-10-20 00:20:03,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:20:03" (1/1) ... [2020-10-20 00:20:03,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:20:03,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:20:03,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:20:03,871 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:20:03,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:20:03,910 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:20:03,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:03 WrapperNode [2020-10-20 00:20:03,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:20:03,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:20:03,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:20:03,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:20:03,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:03" (1/1) ... [2020-10-20 00:20:03,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:03" (1/1) ... [2020-10-20 00:20:03,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:20:03,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:20:03,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:20:03,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:20:03,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:03" (1/1) ... [2020-10-20 00:20:03,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:03" (1/1) ... [2020-10-20 00:20:03,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:03" (1/1) ... [2020-10-20 00:20:03,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:03" (1/1) ... [2020-10-20 00:20:03,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:03" (1/1) ... [2020-10-20 00:20:03,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:03" (1/1) ... [2020-10-20 00:20:03,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:03" (1/1) ... [2020-10-20 00:20:03,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:20:03,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:20:03,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:20:03,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:20:03,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:03" (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 00:20:04,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:20:04,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:20:04,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-20 00:20:04,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:20:04,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-20 00:20:04,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:20:04,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:20:04,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:20:04,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:20:04,276 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:20:04,277 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-20 00:20:04,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:20:04 BoogieIcfgContainer [2020-10-20 00:20:04,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:20:04,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:20:04,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:20:04,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:20:04,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:20:03" (1/3) ... [2020-10-20 00:20:04,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365e7779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:20:04, skipping insertion in model container [2020-10-20 00:20:04,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:03" (2/3) ... [2020-10-20 00:20:04,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365e7779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:20:04, skipping insertion in model container [2020-10-20 00:20:04,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:20:04" (3/3) ... [2020-10-20 00:20:04,289 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_sqrt_Quake.c [2020-10-20 00:20:04,302 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:20:04,311 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:20:04,334 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:20:04,373 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:20:04,373 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:20:04,374 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:20:04,374 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:20:04,374 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:20:04,375 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:20:04,375 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:20:04,376 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:20:04,394 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-10-20 00:20:04,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-20 00:20:04,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:20:04,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:20:04,404 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:20:04,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:20:04,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1804965382, now seen corresponding path program 1 times [2020-10-20 00:20:04,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:20:04,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503235016] [2020-10-20 00:20:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:20:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:20:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:20:04,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503235016] [2020-10-20 00:20:04,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:20:04,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:20:04,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913961778] [2020-10-20 00:20:04,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:20:04,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:20:04,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:20:04,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:20:04,600 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-10-20 00:20:04,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:20:04,616 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-10-20 00:20:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:20:04,617 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-10-20 00:20:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:20:04,625 INFO L225 Difference]: With dead ends: 22 [2020-10-20 00:20:04,626 INFO L226 Difference]: Without dead ends: 8 [2020-10-20 00:20:04,629 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 00:20:04,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-20 00:20:04,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-20 00:20:04,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 00:20:04,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-10-20 00:20:04,657 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-10-20 00:20:04,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:20:04,657 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-10-20 00:20:04,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:20:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-10-20 00:20:04,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-20 00:20:04,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:20:04,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:20:04,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:20:04,659 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:20:04,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:20:04,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1806812424, now seen corresponding path program 1 times [2020-10-20 00:20:04,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:20:04,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143432979] [2020-10-20 00:20:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:20:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:20:04,703 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:20:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:20:04,729 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:20:04,754 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:20:04,754 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:20:04,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:20:04,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:20:04 BoogieIcfgContainer [2020-10-20 00:20:04,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:20:04,785 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:20:04,785 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:20:04,785 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:20:04,786 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:20:04" (3/4) ... [2020-10-20 00:20:04,790 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:20:04,790 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:20:04,792 INFO L168 Benchmark]: Toolchain (without parser) took 1184.76 ms. Allocated memory was 41.4 MB in the beginning and 44.0 MB in the end (delta: 2.6 MB). Free memory was 19.9 MB in the beginning and 11.0 MB in the end (delta: 8.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:04,793 INFO L168 Benchmark]: CDTParser took 0.80 ms. Allocated memory is still 32.0 MB. Free memory was 9.1 MB in the beginning and 9.1 MB in the end (delta: 68.4 kB). Peak memory consumption was 68.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:20:04,794 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.95 ms. Allocated memory was 41.4 MB in the beginning and 41.9 MB in the end (delta: 524.3 kB). Free memory was 19.0 MB in the beginning and 20.2 MB in the end (delta: -1.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:04,795 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.85 ms. Allocated memory is still 41.9 MB. Free memory was 20.2 MB in the beginning and 18.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:04,796 INFO L168 Benchmark]: Boogie Preprocessor took 26.59 ms. Allocated memory is still 41.9 MB. Free memory was 18.5 MB in the beginning and 17.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:04,797 INFO L168 Benchmark]: RCFGBuilder took 296.24 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 17.0 MB in the beginning and 19.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 8.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:04,798 INFO L168 Benchmark]: TraceAbstraction took 504.18 ms. Allocated memory was 43.5 MB in the beginning and 44.0 MB in the end (delta: 524.3 kB). Free memory was 19.3 MB in the beginning and 11.6 MB in the end (delta: 7.7 MB). Peak memory consumption was 8.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:04,799 INFO L168 Benchmark]: Witness Printer took 5.15 ms. Allocated memory is still 44.0 MB. Free memory was 11.6 MB in the beginning and 11.0 MB in the end (delta: 534.7 kB). Peak memory consumption was 534.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:20:04,807 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80 ms. Allocated memory is still 32.0 MB. Free memory was 9.1 MB in the beginning and 9.1 MB in the end (delta: 68.4 kB). Peak memory consumption was 68.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 295.95 ms. Allocated memory was 41.4 MB in the beginning and 41.9 MB in the end (delta: 524.3 kB). Free memory was 19.0 MB in the beginning and 20.2 MB in the end (delta: -1.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 43.85 ms. Allocated memory is still 41.9 MB. Free memory was 20.2 MB in the beginning and 18.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 26.59 ms. Allocated memory is still 41.9 MB. Free memory was 18.5 MB in the beginning and 17.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 296.24 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 17.0 MB in the beginning and 19.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 8.0 MB. Max. memory is 14.3 GB. * TraceAbstraction took 504.18 ms. Allocated memory was 43.5 MB in the beginning and 44.0 MB in the end (delta: 524.3 kB). Free memory was 19.3 MB in the beginning and 11.6 MB in the end (delta: 7.7 MB). Peak memory consumption was 8.2 MB. Max. memory is 14.3 GB. * Witness Printer took 5.15 ms. Allocated memory is still 44.0 MB. Free memory was 11.6 MB in the beginning and 11.0 MB in the end (delta: 534.7 kB). Peak memory consumption was 534.7 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 someBinaryFLOATComparisonOperation at line 52, overapproximation of someBinaryDOUBLEComparisonOperation at line 52, overapproximation of someBinaryArithmeticFLOAToperation at line 22. Possible FailurePath: [L45] float a,r; [L47] a = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] float xhalf = 0.5f*x; [L23] union float_int i; [L24] i.f = x [L25] EXPR i.i [L25] i.i = 0x5f3759df - (i.i>>1) [L26] EXPR i.f [L26] x = i.f [L27] x = x*(1.5f-xhalf*x*x) [L28] return x; [L28] return x; [L50] r = InvSqrt(a) [L13] COND TRUE !(cond) [L3] __assert_fail("0", "inv_sqrt_Quake.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 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=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 36 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 00:20:06,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:20:06,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:20:06,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:20:06,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:20:06,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:20:06,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:20:06,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:20:06,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:20:06,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:20:06,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:20:06,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:20:06,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:20:06,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:20:06,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:20:06,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:20:07,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:20:07,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:20:07,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:20:07,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:20:07,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:20:07,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:20:07,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:20:07,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:20:07,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:20:07,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:20:07,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:20:07,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:20:07,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:20:07,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:20:07,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:20:07,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:20:07,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:20:07,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:20:07,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:20:07,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:20:07,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:20:07,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:20:07,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:20:07,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:20:07,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:20:07,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:20:07,091 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:20:07,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:20:07,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:20:07,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:20:07,094 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:20:07,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:20:07,095 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:20:07,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:20:07,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:20:07,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:20:07,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:20:07,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:20:07,098 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:20:07,098 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:20:07,099 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:20:07,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:20:07,099 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:20:07,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:20:07,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:20:07,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:20:07,100 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:20:07,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:20:07,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:20:07,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:20:07,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:20:07,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:20:07,102 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:20:07,102 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:20:07,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:20:07,103 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:20:07,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:20:07,104 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 -> b5a9a5f04ffebcbeddfcdcc0054cf362a3fa4d7b [2020-10-20 00:20:07,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:20:07,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:20:07,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:20:07,348 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:20:07,348 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:20:07,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c [2020-10-20 00:20:07,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d34c8e07e/528181ec574f4221b5841a4b93ef3dbd/FLAG779cd8946 [2020-10-20 00:20:07,897 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:20:07,898 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_sqrt_Quake.c [2020-10-20 00:20:07,904 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d34c8e07e/528181ec574f4221b5841a4b93ef3dbd/FLAG779cd8946 [2020-10-20 00:20:08,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d34c8e07e/528181ec574f4221b5841a4b93ef3dbd [2020-10-20 00:20:08,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:20:08,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:20:08,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:20:08,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:20:08,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:20:08,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:20:08" (1/1) ... [2020-10-20 00:20:08,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4932fa4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:08, skipping insertion in model container [2020-10-20 00:20:08,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:20:08" (1/1) ... [2020-10-20 00:20:08,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:20:08,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:20:08,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:20:08,585 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:20:08,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:20:08,663 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:20:08,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:08 WrapperNode [2020-10-20 00:20:08,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:20:08,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:20:08,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:20:08,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:20:08,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:08" (1/1) ... [2020-10-20 00:20:08,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:08" (1/1) ... [2020-10-20 00:20:08,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:20:08,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:20:08,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:20:08,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:20:08,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:08" (1/1) ... [2020-10-20 00:20:08,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:08" (1/1) ... [2020-10-20 00:20:08,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:08" (1/1) ... [2020-10-20 00:20:08,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:08" (1/1) ... [2020-10-20 00:20:08,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:08" (1/1) ... [2020-10-20 00:20:08,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:08" (1/1) ... [2020-10-20 00:20:08,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:08" (1/1) ... [2020-10-20 00:20:08,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:20:08,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:20:08,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:20:08,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:20:08,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:08" (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 00:20:08,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:20:08,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:20:08,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE4 [2020-10-20 00:20:08,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 00:20:08,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:20:08,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:20:08,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-10-20 00:20:08,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:20:08,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-20 00:20:11,246 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:20:11,248 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-20 00:20:11,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:20:11 BoogieIcfgContainer [2020-10-20 00:20:11,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:20:11,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:20:11,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:20:11,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:20:11,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:20:08" (1/3) ... [2020-10-20 00:20:11,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3ed784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:20:11, skipping insertion in model container [2020-10-20 00:20:11,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:20:08" (2/3) ... [2020-10-20 00:20:11,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3ed784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:20:11, skipping insertion in model container [2020-10-20 00:20:11,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:20:11" (3/3) ... [2020-10-20 00:20:11,276 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_sqrt_Quake.c [2020-10-20 00:20:11,301 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:20:11,312 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:20:11,328 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:20:11,363 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:20:11,363 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:20:11,364 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:20:11,364 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:20:11,364 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:20:11,365 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:20:11,365 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:20:11,365 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:20:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-10-20 00:20:11,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-20 00:20:11,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:20:11,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:20:11,397 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:20:11,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:20:11,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1804965382, now seen corresponding path program 1 times [2020-10-20 00:20:11,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:20:11,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443234024] [2020-10-20 00:20:11,437 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 00:20:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:20:11,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:20:11,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:20:11,817 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 00:20:11,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:20:11,820 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 00:20:11,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443234024] [2020-10-20 00:20:11,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:20:11,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:20:11,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674763090] [2020-10-20 00:20:11,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:20:11,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:20:11,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:20:11,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:20:11,845 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-10-20 00:20:11,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:20:11,863 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-10-20 00:20:11,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:20:11,865 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-10-20 00:20:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:20:11,875 INFO L225 Difference]: With dead ends: 22 [2020-10-20 00:20:11,876 INFO L226 Difference]: Without dead ends: 8 [2020-10-20 00:20:11,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 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 00:20:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-20 00:20:11,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-20 00:20:11,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 00:20:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-10-20 00:20:11,917 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-10-20 00:20:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:20:11,918 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-10-20 00:20:11,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:20:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-10-20 00:20:11,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-20 00:20:11,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:20:11,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:20:12,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:20:12,134 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:20:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:20:12,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1806812424, now seen corresponding path program 1 times [2020-10-20 00:20:12,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:20:12,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369985517] [2020-10-20 00:20:12,149 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 00:20:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:20:13,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 00:20:13,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:20:13,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369985517] [2020-10-20 00:20:13,908 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:20:13,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1161654473] [2020-10-20 00:20:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-20 00:20:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:20:14,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 00:20:14,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:20:14,951 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:20:14,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436580468] [2020-10-20 00:20:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:20:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:20:50,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 00:20:50,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:20:50,070 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:20:50,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:20:50,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-20 00:20:50,071 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-20 00:20:50,071 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:20:50,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 mathsat -unsat_core_generation=3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:20:50,700 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-20 00:20:50,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:20:50 BoogieIcfgContainer [2020-10-20 00:20:50,701 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:20:50,701 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:20:50,702 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:20:50,702 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:20:50,703 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:20:11" (3/4) ... [2020-10-20 00:20:50,707 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:20:50,708 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:20:50,711 INFO L168 Benchmark]: Toolchain (without parser) took 42453.12 ms. Allocated memory was 39.8 MB in the beginning and 44.0 MB in the end (delta: 4.2 MB). Free memory was 18.1 MB in the beginning and 17.7 MB in the end (delta: 374.3 kB). Peak memory consumption was 4.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:50,712 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 29.9 MB. Free memory was 6.0 MB in the beginning and 6.0 MB in the end (delta: 42.0 kB). Peak memory consumption was 42.0 kB. Max. memory is 14.3 GB. [2020-10-20 00:20:50,713 INFO L168 Benchmark]: CACSL2BoogieTranslator took 401.61 ms. Allocated memory was 39.8 MB in the beginning and 40.4 MB in the end (delta: 524.3 kB). Free memory was 17.2 MB in the beginning and 17.5 MB in the end (delta: -337.0 kB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:50,714 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.26 ms. Allocated memory is still 40.4 MB. Free memory was 17.5 MB in the beginning and 15.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:50,715 INFO L168 Benchmark]: Boogie Preprocessor took 32.23 ms. Allocated memory is still 40.4 MB. Free memory was 15.6 MB in the beginning and 14.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:50,716 INFO L168 Benchmark]: RCFGBuilder took 2493.57 ms. Allocated memory was 40.4 MB in the beginning and 41.9 MB in the end (delta: 1.6 MB). Free memory was 14.1 MB in the beginning and 15.5 MB in the end (delta: -1.4 MB). Peak memory consumption was 4.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:20:50,717 INFO L168 Benchmark]: TraceAbstraction took 39448.76 ms. Allocated memory was 41.9 MB in the beginning and 44.0 MB in the end (delta: 2.1 MB). Free memory was 15.0 MB in the beginning and 18.3 MB in the end (delta: -3.3 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:20:50,717 INFO L168 Benchmark]: Witness Printer took 6.43 ms. Allocated memory is still 44.0 MB. Free memory was 18.3 MB in the beginning and 17.7 MB in the end (delta: 619.1 kB). Peak memory consumption was 619.1 kB. Max. memory is 14.3 GB. [2020-10-20 00:20:50,723 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 29.9 MB. Free memory was 6.0 MB in the beginning and 6.0 MB in the end (delta: 42.0 kB). Peak memory consumption was 42.0 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 401.61 ms. Allocated memory was 39.8 MB in the beginning and 40.4 MB in the end (delta: 524.3 kB). Free memory was 17.2 MB in the beginning and 17.5 MB in the end (delta: -337.0 kB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 59.26 ms. Allocated memory is still 40.4 MB. Free memory was 17.5 MB in the beginning and 15.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 32.23 ms. Allocated memory is still 40.4 MB. Free memory was 15.6 MB in the beginning and 14.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 2493.57 ms. Allocated memory was 40.4 MB in the beginning and 41.9 MB in the end (delta: 1.6 MB). Free memory was 14.1 MB in the beginning and 15.5 MB in the end (delta: -1.4 MB). Peak memory consumption was 4.8 MB. Max. memory is 14.3 GB. * TraceAbstraction took 39448.76 ms. Allocated memory was 41.9 MB in the beginning and 44.0 MB in the end (delta: 2.1 MB). Free memory was 15.0 MB in the beginning and 18.3 MB in the end (delta: -3.3 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 6.43 ms. Allocated memory is still 44.0 MB. Free memory was 18.3 MB in the beginning and 17.7 MB in the end (delta: 619.1 kB). Peak memory consumption was 619.1 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: unable to decide satisfiability of path constraint. Possible FailurePath: [L45] float a,r; [L47] a = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] float xhalf = 0.5f*x; [L23] union float_int i; [L24] i.f = x [L25] EXPR i.i [L25] i.i = 0x5f3759df - (i.i>>1) [L26] EXPR i.f [L26] x = i.f [L27] x = x*(1.5f-xhalf*x*x) [L28] return x; [L28] return x; [L50] r = InvSqrt(a) [L13] COND TRUE !(cond) [L3] __assert_fail("0", "inv_sqrt_Quake.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 39.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 72 SizeOfPredicates, 0 NumberOfNonLiveVariables, 43 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...