./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-cdfpl/square_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-cdfpl/square_3.i -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 df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 ............................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-cdfpl/square_3.i -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 df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 ........................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 21:33:17,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 21:33:17,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 21:33:17,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 21:33:17,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 21:33:17,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 21:33:17,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 21:33:17,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 21:33:17,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 21:33:17,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 21:33:17,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 21:33:17,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 21:33:17,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 21:33:17,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 21:33:17,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 21:33:17,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 21:33:17,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 21:33:17,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 21:33:17,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 21:33:17,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 21:33:17,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 21:33:17,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 21:33:17,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 21:33:17,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 21:33:17,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 21:33:17,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 21:33:17,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 21:33:17,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 21:33:17,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 21:33:17,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 21:33:17,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 21:33:17,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 21:33:17,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 21:33:17,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 21:33:17,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 21:33:17,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 21:33:17,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 21:33:17,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 21:33:17,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 21:33:17,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 21:33:17,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 21:33:17,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 21:33:17,808 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 21:33:17,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 21:33:17,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 21:33:17,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 21:33:17,813 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 21:33:17,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 21:33:17,814 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 21:33:17,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 21:33:17,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 21:33:17,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 21:33:17,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 21:33:17,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 21:33:17,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 21:33:17,816 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 21:33:17,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 21:33:17,817 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 21:33:17,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 21:33:17,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 21:33:17,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 21:33:17,818 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 21:33:17,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 21:33:17,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 21:33:17,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 21:33:17,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 21:33:17,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 21:33:17,820 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 21:33:17,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 21:33:17,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 21:33:17,821 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 21:33:17,821 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 [2020-10-25 21:33:18,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 21:33:18,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 21:33:18,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 21:33:18,271 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 21:33:18,272 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 21:33:18,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_3.i [2020-10-25 21:33:18,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f324aefbe/a964578ee10645e8b24c2fdccac6aab3/FLAG88ae29489 [2020-10-25 21:33:19,001 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 21:33:19,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_3.i [2020-10-25 21:33:19,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f324aefbe/a964578ee10645e8b24c2fdccac6aab3/FLAG88ae29489 [2020-10-25 21:33:19,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f324aefbe/a964578ee10645e8b24c2fdccac6aab3 [2020-10-25 21:33:19,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 21:33:19,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 21:33:19,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 21:33:19,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 21:33:19,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 21:33:19,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:33:19" (1/1) ... [2020-10-25 21:33:19,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51c0ea1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:19, skipping insertion in model container [2020-10-25 21:33:19,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:33:19" (1/1) ... [2020-10-25 21:33:19,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 21:33:19,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 21:33:19,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:33:19,629 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 21:33:19,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:33:19,661 INFO L208 MainTranslator]: Completed translation [2020-10-25 21:33:19,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:19 WrapperNode [2020-10-25 21:33:19,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 21:33:19,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 21:33:19,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 21:33:19,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 21:33:19,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:19" (1/1) ... [2020-10-25 21:33:19,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:19" (1/1) ... [2020-10-25 21:33:19,698 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 21:33:19,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 21:33:19,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 21:33:19,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 21:33:19,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:19" (1/1) ... [2020-10-25 21:33:19,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:19" (1/1) ... [2020-10-25 21:33:19,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:19" (1/1) ... [2020-10-25 21:33:19,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:19" (1/1) ... [2020-10-25 21:33:19,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:19" (1/1) ... [2020-10-25 21:33:19,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:19" (1/1) ... [2020-10-25 21:33:19,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:19" (1/1) ... [2020-10-25 21:33:19,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 21:33:19,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 21:33:19,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 21:33:19,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 21:33:19,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:19" (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 [2020-10-25 21:33:19,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 21:33:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 21:33:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 21:33:19,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 21:33:20,167 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 21:33:20,168 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-25 21:33:20,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:33:20 BoogieIcfgContainer [2020-10-25 21:33:20,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 21:33:20,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 21:33:20,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 21:33:20,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 21:33:20,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 09:33:19" (1/3) ... [2020-10-25 21:33:20,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bdb14c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:33:20, skipping insertion in model container [2020-10-25 21:33:20,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:19" (2/3) ... [2020-10-25 21:33:20,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bdb14c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:33:20, skipping insertion in model container [2020-10-25 21:33:20,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:33:20" (3/3) ... [2020-10-25 21:33:20,182 INFO L111 eAbstractionObserver]: Analyzing ICFG square_3.i [2020-10-25 21:33:20,206 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 21:33:20,211 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 21:33:20,227 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 21:33:20,256 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 21:33:20,256 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 21:33:20,256 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 21:33:20,257 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 21:33:20,257 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 21:33:20,257 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 21:33:20,257 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 21:33:20,258 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 21:33:20,273 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-25 21:33:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 21:33:20,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:33:20,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:33:20,281 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:33:20,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:33:20,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1804966438, now seen corresponding path program 1 times [2020-10-25 21:33:20,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 21:33:20,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251258744] [2020-10-25 21:33:20,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 21:33:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:33:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:33:20,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251258744] [2020-10-25 21:33:20,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:33:20,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 21:33:20,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099901346] [2020-10-25 21:33:20,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 21:33:20,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 21:33:20,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 21:33:20,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 21:33:20,512 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-25 21:33:20,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:33:20,531 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-25 21:33:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 21:33:20,533 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-10-25 21:33:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:33:20,544 INFO L225 Difference]: With dead ends: 21 [2020-10-25 21:33:20,544 INFO L226 Difference]: Without dead ends: 8 [2020-10-25 21:33:20,549 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 [2020-10-25 21:33:20,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-25 21:33:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-25 21:33:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-25 21:33:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-10-25 21:33:20,591 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-10-25 21:33:20,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:33:20,592 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-10-25 21:33:20,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 21:33:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-10-25 21:33:20,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 21:33:20,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:33:20,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:33:20,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 21:33:20,596 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:33:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:33:20,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1806813480, now seen corresponding path program 1 times [2020-10-25 21:33:20,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 21:33:20,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132149801] [2020-10-25 21:33:20,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 21:33:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:33:20,645 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:33:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:33:20,667 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:33:20,697 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 21:33:20,697 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 21:33:20,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 21:33:20,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 09:33:20 BoogieIcfgContainer [2020-10-25 21:33:20,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 21:33:20,723 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 21:33:20,724 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 21:33:20,724 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 21:33:20,725 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:33:20" (3/4) ... [2020-10-25 21:33:20,728 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-25 21:33:20,728 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 21:33:20,731 INFO L168 Benchmark]: Toolchain (without parser) took 1358.70 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 33.4 MB in the beginning and 52.4 MB in the end (delta: -19.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:33:20,732 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 56.6 MB. Free memory was 38.4 MB in the beginning and 38.3 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:33:20,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.04 ms. Allocated memory is still 56.6 MB. Free memory was 32.7 MB in the beginning and 38.6 MB in the end (delta: -5.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:20,734 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.88 ms. Allocated memory is still 56.6 MB. Free memory was 38.4 MB in the beginning and 37.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:20,735 INFO L168 Benchmark]: Boogie Preprocessor took 22.24 ms. Allocated memory is still 56.6 MB. Free memory was 37.1 MB in the beginning and 36.2 MB in the end (delta: 907.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:33:20,736 INFO L168 Benchmark]: RCFGBuilder took 447.25 ms. Allocated memory is still 56.6 MB. Free memory was 36.0 MB in the beginning and 26.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:20,737 INFO L168 Benchmark]: TraceAbstraction took 549.77 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 25.6 MB in the beginning and 52.8 MB in the end (delta: -27.2 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:20,738 INFO L168 Benchmark]: Witness Printer took 5.31 ms. Allocated memory is still 71.3 MB. Free memory was 52.8 MB in the beginning and 52.4 MB in the end (delta: 390.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:33:20,743 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 56.6 MB. Free memory was 38.4 MB in the beginning and 38.3 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 285.04 ms. Allocated memory is still 56.6 MB. Free memory was 32.7 MB in the beginning and 38.6 MB in the end (delta: -5.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.88 ms. Allocated memory is still 56.6 MB. Free memory was 38.4 MB in the beginning and 37.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.24 ms. Allocated memory is still 56.6 MB. Free memory was 37.1 MB in the beginning and 36.2 MB in the end (delta: 907.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 447.25 ms. Allocated memory is still 56.6 MB. Free memory was 36.0 MB in the beginning and 26.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 549.77 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 25.6 MB in the beginning and 52.8 MB in the end (delta: -27.2 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * Witness Printer took 5.31 ms. Allocated memory is still 71.3 MB. Free memory was 52.8 MB in the beginning and 52.4 MB in the end (delta: 390.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 28, overapproximation of someBinaryArithmeticFLOAToperation at line 26. Possible FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.39843f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_3.c", 7, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, 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=12occurred 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 0.2.0-5485861 [2020-10-25 21:33:23,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 21:33:23,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 21:33:23,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 21:33:23,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 21:33:23,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 21:33:23,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 21:33:23,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 21:33:23,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 21:33:23,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 21:33:23,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 21:33:23,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 21:33:23,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 21:33:23,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 21:33:23,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 21:33:23,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 21:33:23,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 21:33:23,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 21:33:23,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 21:33:23,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 21:33:23,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 21:33:23,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 21:33:23,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 21:33:23,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 21:33:23,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 21:33:23,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 21:33:23,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 21:33:23,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 21:33:23,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 21:33:23,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 21:33:23,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 21:33:23,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 21:33:23,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 21:33:23,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 21:33:23,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 21:33:23,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 21:33:23,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 21:33:23,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 21:33:23,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 21:33:23,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 21:33:23,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 21:33:23,386 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-25 21:33:23,415 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 21:33:23,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 21:33:23,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 21:33:23,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 21:33:23,418 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 21:33:23,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 21:33:23,418 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 21:33:23,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 21:33:23,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 21:33:23,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 21:33:23,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 21:33:23,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 21:33:23,420 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-25 21:33:23,420 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-25 21:33:23,420 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 21:33:23,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 21:33:23,421 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 21:33:23,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 21:33:23,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 21:33:23,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 21:33:23,422 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 21:33:23,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 21:33:23,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 21:33:23,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 21:33:23,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 21:33:23,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 21:33:23,424 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-25 21:33:23,424 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-25 21:33:23,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 21:33:23,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 21:33:23,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-25 21:33:23,425 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df17c4a5cf1f8b8dec3dbd48ac37c795f9b13b26 [2020-10-25 21:33:23,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 21:33:23,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 21:33:23,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 21:33:23,851 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 21:33:23,852 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 21:33:23,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cdfpl/square_3.i [2020-10-25 21:33:23,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84bfbb5f8/aec5a8f268504a55ba81a63da4182729/FLAG80c2faf30 [2020-10-25 21:33:24,472 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 21:33:24,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/floats-cdfpl/square_3.i [2020-10-25 21:33:24,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84bfbb5f8/aec5a8f268504a55ba81a63da4182729/FLAG80c2faf30 [2020-10-25 21:33:24,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84bfbb5f8/aec5a8f268504a55ba81a63da4182729 [2020-10-25 21:33:24,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 21:33:24,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 21:33:24,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 21:33:24,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 21:33:24,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 21:33:24,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:33:24" (1/1) ... [2020-10-25 21:33:24,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b48986e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:24, skipping insertion in model container [2020-10-25 21:33:24,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 09:33:24" (1/1) ... [2020-10-25 21:33:24,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 21:33:24,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 21:33:25,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:33:25,129 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 21:33:25,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 21:33:25,169 INFO L208 MainTranslator]: Completed translation [2020-10-25 21:33:25,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:25 WrapperNode [2020-10-25 21:33:25,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 21:33:25,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 21:33:25,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 21:33:25,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 21:33:25,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:25" (1/1) ... [2020-10-25 21:33:25,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:25" (1/1) ... [2020-10-25 21:33:25,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 21:33:25,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 21:33:25,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 21:33:25,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 21:33:25,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:25" (1/1) ... [2020-10-25 21:33:25,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:25" (1/1) ... [2020-10-25 21:33:25,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:25" (1/1) ... [2020-10-25 21:33:25,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:25" (1/1) ... [2020-10-25 21:33:25,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:25" (1/1) ... [2020-10-25 21:33:25,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:25" (1/1) ... [2020-10-25 21:33:25,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:25" (1/1) ... [2020-10-25 21:33:25,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 21:33:25,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 21:33:25,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 21:33:25,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 21:33:25,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:25" (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 [2020-10-25 21:33:25,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-25 21:33:25,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 21:33:25,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 21:33:25,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 21:33:27,828 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 21:33:27,829 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-25 21:33:27,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:33:27 BoogieIcfgContainer [2020-10-25 21:33:27,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 21:33:27,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 21:33:27,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 21:33:27,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 21:33:27,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 09:33:24" (1/3) ... [2020-10-25 21:33:27,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2278599a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:33:27, skipping insertion in model container [2020-10-25 21:33:27,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 09:33:25" (2/3) ... [2020-10-25 21:33:27,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2278599a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 09:33:27, skipping insertion in model container [2020-10-25 21:33:27,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:33:27" (3/3) ... [2020-10-25 21:33:27,841 INFO L111 eAbstractionObserver]: Analyzing ICFG square_3.i [2020-10-25 21:33:27,853 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 21:33:27,858 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 21:33:27,872 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 21:33:27,899 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 21:33:27,899 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 21:33:27,900 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 21:33:27,900 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 21:33:27,900 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 21:33:27,900 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 21:33:27,900 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 21:33:27,901 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 21:33:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-25 21:33:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 21:33:27,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:33:27,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:33:27,922 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:33:27,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:33:27,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1804966438, now seen corresponding path program 1 times [2020-10-25 21:33:27,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 21:33:27,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387913373] [2020-10-25 21:33:27,944 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 [2020-10-25 21:33:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 21:33:28,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-25 21:33:28,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 21:33:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:33:28,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 21:33:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 21:33:28,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387913373] [2020-10-25 21:33:28,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 21:33:28,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-25 21:33:28,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615486965] [2020-10-25 21:33:28,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 21:33:28,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 21:33:28,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 21:33:28,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 21:33:28,780 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-25 21:33:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 21:33:28,795 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-10-25 21:33:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 21:33:28,797 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-10-25 21:33:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 21:33:28,811 INFO L225 Difference]: With dead ends: 21 [2020-10-25 21:33:28,812 INFO L226 Difference]: Without dead ends: 8 [2020-10-25 21:33:28,815 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 [2020-10-25 21:33:28,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-25 21:33:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-25 21:33:28,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-25 21:33:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-10-25 21:33:28,848 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-10-25 21:33:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 21:33:28,848 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-10-25 21:33:28,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 21:33:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-10-25 21:33:28,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 21:33:28,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 21:33:28,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 21:33:29,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-25 21:33:29,067 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 21:33:29,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 21:33:29,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1806813480, now seen corresponding path program 1 times [2020-10-25 21:33:29,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 21:33:29,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338411672] [2020-10-25 21:33:29,070 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 [2020-10-25 21:33:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:33:34,003 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:33:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 21:33:41,664 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 21:33:41,747 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-25 21:33:41,747 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 21:33:41,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-25 21:33:41,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 09:33:41 BoogieIcfgContainer [2020-10-25 21:33:41,974 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 21:33:41,974 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 21:33:41,975 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 21:33:41,975 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 21:33:41,976 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 09:33:27" (3/4) ... [2020-10-25 21:33:41,978 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 21:33:42,018 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 21:33:42,019 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 21:33:42,021 INFO L168 Benchmark]: Toolchain (without parser) took 17177.72 ms. Allocated memory was 50.3 MB in the beginning and 69.2 MB in the end (delta: 18.9 MB). Free memory was 27.1 MB in the beginning and 39.7 MB in the end (delta: -12.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:42,022 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 50.3 MB. Free memory was 34.1 MB in the beginning and 34.1 MB in the end (delta: 40.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 21:33:42,023 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.27 ms. Allocated memory is still 50.3 MB. Free memory was 26.5 MB in the beginning and 29.7 MB in the end (delta: -3.2 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:42,024 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.81 ms. Allocated memory is still 50.3 MB. Free memory was 29.7 MB in the beginning and 28.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:42,025 INFO L168 Benchmark]: Boogie Preprocessor took 61.74 ms. Allocated memory is still 50.3 MB. Free memory was 28.2 MB in the beginning and 27.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:42,026 INFO L168 Benchmark]: RCFGBuilder took 2525.23 ms. Allocated memory was 50.3 MB in the beginning and 69.2 MB in the end (delta: 18.9 MB). Free memory was 27.0 MB in the beginning and 48.4 MB in the end (delta: -21.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:42,027 INFO L168 Benchmark]: TraceAbstraction took 14141.12 ms. Allocated memory is still 69.2 MB. Free memory was 47.8 MB in the beginning and 41.4 MB in the end (delta: 6.4 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:42,028 INFO L168 Benchmark]: Witness Printer took 44.57 ms. Allocated memory is still 69.2 MB. Free memory was 41.4 MB in the beginning and 39.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 21:33:42,033 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 50.3 MB. Free memory was 34.1 MB in the beginning and 34.1 MB in the end (delta: 40.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 317.27 ms. Allocated memory is still 50.3 MB. Free memory was 26.5 MB in the beginning and 29.7 MB in the end (delta: -3.2 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.81 ms. Allocated memory is still 50.3 MB. Free memory was 29.7 MB in the beginning and 28.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.74 ms. Allocated memory is still 50.3 MB. Free memory was 28.2 MB in the beginning and 27.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2525.23 ms. Allocated memory was 50.3 MB in the beginning and 69.2 MB in the end (delta: 18.9 MB). Free memory was 27.0 MB in the beginning and 48.4 MB in the end (delta: -21.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14141.12 ms. Allocated memory is still 69.2 MB. Free memory was 47.8 MB in the beginning and 41.4 MB in the end (delta: 6.4 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. * Witness Printer took 44.57 ms. Allocated memory is still 69.2 MB. Free memory was 41.4 MB in the beginning and 39.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.39843f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_3.c", 7, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 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=12occurred 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, 5.5s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 72 SizeOfPredicates, 0 NumberOfNonLiveVariables, 27 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...