./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/float-benchs/inv_square-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2880296f Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-benchs/inv_square-2.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 052b65435ce93a43ae641d125fc7546191d1b08e ............................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-benchs/inv_square-2.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 052b65435ce93a43ae641d125fc7546191d1b08e ......................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-2880296 [2020-12-02 14:37:02,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 14:37:02,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 14:37:02,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 14:37:02,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 14:37:02,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 14:37:02,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 14:37:02,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 14:37:02,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 14:37:02,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 14:37:02,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 14:37:02,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 14:37:02,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 14:37:02,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 14:37:02,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 14:37:02,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 14:37:02,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 14:37:02,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 14:37:02,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 14:37:02,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 14:37:02,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 14:37:02,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 14:37:02,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 14:37:02,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 14:37:02,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 14:37:02,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 14:37:02,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 14:37:02,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 14:37:02,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 14:37:02,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 14:37:02,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 14:37:02,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 14:37:02,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 14:37:02,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 14:37:02,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 14:37:02,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 14:37:02,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 14:37:02,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 14:37:02,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 14:37:02,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 14:37:02,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 14:37:02,871 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-02 14:37:02,924 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 14:37:02,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 14:37:02,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 14:37:02,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 14:37:02,926 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 14:37:02,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 14:37:02,927 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 14:37:02,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-02 14:37:02,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 14:37:02,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 14:37:02,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 14:37:02,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 14:37:02,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 14:37:02,928 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 14:37:02,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 14:37:02,928 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 14:37:02,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 14:37:02,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 14:37:02,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 14:37:02,929 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 14:37:02,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 14:37:02,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 14:37:02,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 14:37:02,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 14:37:02,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 14:37:02,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-02 14:37:02,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-02 14:37:02,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 14:37:02,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 14:37:02,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052b65435ce93a43ae641d125fc7546191d1b08e [2020-12-02 14:37:03,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 14:37:03,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 14:37:03,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 14:37:03,436 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 14:37:03,437 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 14:37:03,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/inv_square-2.c [2020-12-02 14:37:03,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fde190c6a/4bd8352654b741adabcb6de76f345f6d/FLAG1939c4e9d [2020-12-02 14:37:04,326 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 14:37:04,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/inv_square-2.c [2020-12-02 14:37:04,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fde190c6a/4bd8352654b741adabcb6de76f345f6d/FLAG1939c4e9d [2020-12-02 14:37:04,674 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fde190c6a/4bd8352654b741adabcb6de76f345f6d [2020-12-02 14:37:04,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 14:37:04,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 14:37:04,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 14:37:04,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 14:37:04,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 14:37:04,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:37:04" (1/1) ... [2020-12-02 14:37:04,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1beb03a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:04, skipping insertion in model container [2020-12-02 14:37:04,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:37:04" (1/1) ... [2020-12-02 14:37:04,726 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 14:37:04,766 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 14:37:05,022 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/inv_square-2.c[484,497] [2020-12-02 14:37:05,052 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:37:05,064 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 14:37:05,083 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/inv_square-2.c[484,497] [2020-12-02 14:37:05,091 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:37:05,114 INFO L217 MainTranslator]: Completed translation [2020-12-02 14:37:05,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:05 WrapperNode [2020-12-02 14:37:05,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 14:37:05,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 14:37:05,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 14:37:05,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 14:37:05,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:05" (1/1) ... [2020-12-02 14:37:05,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:05" (1/1) ... [2020-12-02 14:37:05,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 14:37:05,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 14:37:05,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 14:37:05,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 14:37:05,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:05" (1/1) ... [2020-12-02 14:37:05,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:05" (1/1) ... [2020-12-02 14:37:05,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:05" (1/1) ... [2020-12-02 14:37:05,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:05" (1/1) ... [2020-12-02 14:37:05,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:05" (1/1) ... [2020-12-02 14:37:05,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:05" (1/1) ... [2020-12-02 14:37:05,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:05" (1/1) ... [2020-12-02 14:37:05,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 14:37:05,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 14:37:05,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 14:37:05,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 14:37:05,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 14:37:05,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-02 14:37:05,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 14:37:05,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 14:37:05,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 14:37:05,552 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 14:37:05,552 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-02 14:37:05,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:37:05 BoogieIcfgContainer [2020-12-02 14:37:05,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 14:37:05,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 14:37:05,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 14:37:05,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 14:37:05,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:37:04" (1/3) ... [2020-12-02 14:37:05,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523f583f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:37:05, skipping insertion in model container [2020-12-02 14:37:05,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:05" (2/3) ... [2020-12-02 14:37:05,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523f583f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:37:05, skipping insertion in model container [2020-12-02 14:37:05,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:37:05" (3/3) ... [2020-12-02 14:37:05,564 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2020-12-02 14:37:05,585 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 14:37:05,589 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 14:37:05,605 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 14:37:05,638 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 14:37:05,639 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 14:37:05,639 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 14:37:05,639 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 14:37:05,639 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 14:37:05,639 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 14:37:05,639 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 14:37:05,640 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 14:37:05,657 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-02 14:37:05,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-02 14:37:05,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:37:05,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-02 14:37:05,666 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:37:05,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:37:05,675 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2020-12-02 14:37:05,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:37:05,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635679153] [2020-12-02 14:37:05,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:37:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:37:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:37:05,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635679153] [2020-12-02 14:37:05,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 14:37:05,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 14:37:05,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015884541] [2020-12-02 14:37:05,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 14:37:05,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:37:05,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 14:37:05,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 14:37:05,907 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-12-02 14:37:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:37:05,928 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-02 14:37:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 14:37:05,930 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-02 14:37:05,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:37:05,942 INFO L225 Difference]: With dead ends: 21 [2020-12-02 14:37:05,942 INFO L226 Difference]: Without dead ends: 7 [2020-12-02 14:37:05,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 14:37:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-02 14:37:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-02 14:37:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-02 14:37:05,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-12-02 14:37:05,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-12-02 14:37:05,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:37:05,989 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-12-02 14:37:05,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 14:37:05,990 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-12-02 14:37:05,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-02 14:37:05,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:37:05,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-02 14:37:05,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-02 14:37:05,991 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:37:05,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:37:05,993 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2020-12-02 14:37:05,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:37:05,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895403881] [2020-12-02 14:37:05,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:37:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 14:37:06,028 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 14:37:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 14:37:06,049 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 14:37:06,073 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-02 14:37:06,074 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 14:37:06,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-02 14:37:06,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:37:06 BoogieIcfgContainer [2020-12-02 14:37:06,102 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 14:37:06,103 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 14:37:06,103 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 14:37:06,103 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 14:37:06,104 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:37:05" (3/4) ... [2020-12-02 14:37:06,109 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-02 14:37:06,109 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 14:37:06,112 INFO L168 Benchmark]: Toolchain (without parser) took 1431.14 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.2 MB in the beginning and 24.5 MB in the end (delta: -3.3 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:06,114 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 44.0 MB. Free memory was 22.0 MB in the beginning and 22.0 MB in the end (delta: 52.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:37:06,115 INFO L168 Benchmark]: CACSL2BoogieTranslator took 433.79 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.1 MB in the beginning and 31.0 MB in the end (delta: -9.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:06,116 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.81 ms. Allocated memory is still 54.5 MB. Free memory was 31.0 MB in the beginning and 29.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:37:06,118 INFO L168 Benchmark]: Boogie Preprocessor took 39.88 ms. Allocated memory is still 54.5 MB. Free memory was 29.7 MB in the beginning and 28.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:06,119 INFO L168 Benchmark]: RCFGBuilder took 346.16 ms. Allocated memory is still 54.5 MB. Free memory was 28.6 MB in the beginning and 30.8 MB in the end (delta: -2.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:06,120 INFO L168 Benchmark]: TraceAbstraction took 546.10 ms. Allocated memory is still 54.5 MB. Free memory was 30.4 MB in the beginning and 24.8 MB in the end (delta: 5.6 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:06,120 INFO L168 Benchmark]: Witness Printer took 6.65 ms. Allocated memory is still 54.5 MB. Free memory was 24.8 MB in the beginning and 24.5 MB in the end (delta: 237.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:37:06,125 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 44.0 MB. Free memory was 22.0 MB in the beginning and 22.0 MB in the end (delta: 52.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 433.79 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.1 MB in the beginning and 31.0 MB in the end (delta: -9.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.81 ms. Allocated memory is still 54.5 MB. Free memory was 31.0 MB in the beginning and 29.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.88 ms. Allocated memory is still 54.5 MB. Free memory was 29.7 MB in the beginning and 28.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 346.16 ms. Allocated memory is still 54.5 MB. Free memory was 28.6 MB in the beginning and 30.8 MB in the end (delta: -2.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 546.10 ms. Allocated memory is still 54.5 MB. Free memory was 30.4 MB in the beginning and 24.8 MB in the end (delta: 5.6 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. * Witness Printer took 6.65 ms. Allocated memory is still 54.5 MB. Free memory was 24.8 MB in the beginning and 24.5 MB in the end (delta: 237.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryArithmeticFLOAT_SMToperation at line 23, overapproximation of someBinaryFLOAT_SMTComparisonOperation at line 22. Possible FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x <= -1e-20f || x >= 1e-20f [L23] y = x * x [L13] COND TRUE !(cond) [L13] reach_error() - 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: 12 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, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-2880296 [2020-12-02 14:37:09,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 14:37:09,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 14:37:09,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 14:37:09,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 14:37:09,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 14:37:09,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 14:37:09,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 14:37:09,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 14:37:09,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 14:37:09,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 14:37:09,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 14:37:09,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 14:37:09,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 14:37:09,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 14:37:09,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 14:37:09,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 14:37:09,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 14:37:09,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 14:37:09,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 14:37:09,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 14:37:09,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 14:37:09,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 14:37:09,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 14:37:09,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 14:37:09,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 14:37:09,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 14:37:09,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 14:37:09,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 14:37:09,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 14:37:09,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 14:37:09,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 14:37:09,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 14:37:09,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 14:37:09,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 14:37:09,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 14:37:09,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 14:37:09,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 14:37:09,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 14:37:09,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 14:37:09,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 14:37:09,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-02 14:37:09,201 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 14:37:09,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 14:37:09,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 14:37:09,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 14:37:09,204 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 14:37:09,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 14:37:09,204 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 14:37:09,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 14:37:09,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 14:37:09,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 14:37:09,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 14:37:09,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 14:37:09,206 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-02 14:37:09,206 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-02 14:37:09,206 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 14:37:09,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 14:37:09,207 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 14:37:09,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 14:37:09,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 14:37:09,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 14:37:09,208 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 14:37:09,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 14:37:09,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 14:37:09,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 14:37:09,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 14:37:09,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 14:37:09,210 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-02 14:37:09,210 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-02 14:37:09,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 14:37:09,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 14:37:09,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-02 14:37:09,211 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052b65435ce93a43ae641d125fc7546191d1b08e [2020-12-02 14:37:09,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 14:37:09,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 14:37:09,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 14:37:09,749 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 14:37:09,750 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 14:37:09,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/inv_square-2.c [2020-12-02 14:37:09,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dfe07c14/6d99a7afb51f4056bb1ffc11738d6fda/FLAG8dca046a0 [2020-12-02 14:37:10,465 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 14:37:10,466 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/inv_square-2.c [2020-12-02 14:37:10,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dfe07c14/6d99a7afb51f4056bb1ffc11738d6fda/FLAG8dca046a0 [2020-12-02 14:37:10,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dfe07c14/6d99a7afb51f4056bb1ffc11738d6fda [2020-12-02 14:37:10,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 14:37:10,845 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 14:37:10,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 14:37:10,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 14:37:10,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 14:37:10,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:37:10" (1/1) ... [2020-12-02 14:37:10,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@679893bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:10, skipping insertion in model container [2020-12-02 14:37:10,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:37:10" (1/1) ... [2020-12-02 14:37:10,895 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 14:37:10,937 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 14:37:11,094 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/inv_square-2.c[484,497] [2020-12-02 14:37:11,111 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:37:11,130 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 14:37:11,146 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/inv_square-2.c[484,497] [2020-12-02 14:37:11,152 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:37:11,173 INFO L217 MainTranslator]: Completed translation [2020-12-02 14:37:11,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:11 WrapperNode [2020-12-02 14:37:11,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 14:37:11,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 14:37:11,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 14:37:11,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 14:37:11,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:11" (1/1) ... [2020-12-02 14:37:11,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:11" (1/1) ... [2020-12-02 14:37:11,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 14:37:11,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 14:37:11,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 14:37:11,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 14:37:11,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:11" (1/1) ... [2020-12-02 14:37:11,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:11" (1/1) ... [2020-12-02 14:37:11,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:11" (1/1) ... [2020-12-02 14:37:11,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:11" (1/1) ... [2020-12-02 14:37:11,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:11" (1/1) ... [2020-12-02 14:37:11,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:11" (1/1) ... [2020-12-02 14:37:11,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:11" (1/1) ... [2020-12-02 14:37:11,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 14:37:11,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 14:37:11,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 14:37:11,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 14:37:11,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 14:37:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-02 14:37:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 14:37:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 14:37:11,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 14:37:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-12-02 14:37:13,259 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 14:37:13,259 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-02 14:37:13,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:37:13 BoogieIcfgContainer [2020-12-02 14:37:13,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 14:37:13,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 14:37:13,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 14:37:13,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 14:37:13,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:37:10" (1/3) ... [2020-12-02 14:37:13,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370f2dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:37:13, skipping insertion in model container [2020-12-02 14:37:13,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:11" (2/3) ... [2020-12-02 14:37:13,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370f2dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:37:13, skipping insertion in model container [2020-12-02 14:37:13,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:37:13" (3/3) ... [2020-12-02 14:37:13,280 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2020-12-02 14:37:13,300 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 14:37:13,305 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 14:37:13,322 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 14:37:13,355 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 14:37:13,356 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 14:37:13,356 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 14:37:13,356 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 14:37:13,356 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 14:37:13,357 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 14:37:13,357 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 14:37:13,357 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 14:37:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-02 14:37:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 14:37:13,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:37:13,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 14:37:13,381 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:37:13,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:37:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1236260269, now seen corresponding path program 1 times [2020-12-02 14:37:13,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 14:37:13,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074693442] [2020-12-02 14:37:13,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-02 14:37:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:37:13,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-02 14:37:13,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:37:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:37:13,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 14:37:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:37:13,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074693442] [2020-12-02 14:37:13,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 14:37:13,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-02 14:37:13,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245629838] [2020-12-02 14:37:13,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 14:37:13,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 14:37:13,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 14:37:13,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 14:37:13,678 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-12-02 14:37:13,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:37:13,697 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-12-02 14:37:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 14:37:13,698 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-02 14:37:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:37:13,708 INFO L225 Difference]: With dead ends: 27 [2020-12-02 14:37:13,708 INFO L226 Difference]: Without dead ends: 11 [2020-12-02 14:37:13,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 14:37:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-02 14:37:13,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-02 14:37:13,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-02 14:37:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-02 14:37:13,746 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2020-12-02 14:37:13,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:37:13,746 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-02 14:37:13,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 14:37:13,747 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-02 14:37:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 14:37:13,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:37:13,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 14:37:13,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-02 14:37:13,949 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:37:13,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:37:13,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1179001967, now seen corresponding path program 1 times [2020-12-02 14:37:13,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 14:37:13,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320591716] [2020-12-02 14:37:13,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-02 14:37:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:37:14,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-02 14:37:14,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:37:14,174 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 14:37:14,179 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-02 14:37:14,345 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-02 14:37:16,738 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-02 14:37:16,767 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 14:37:16,769 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-02 14:37:26,564 WARN L197 SmtUtils]: Spent 7.34 s on a formula simplification that was a NOOP. DAG size: 52 [2020-12-02 14:37:31,433 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 14:37:31,439 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 14:37:31,445 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-02 14:37:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:37:33,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 14:37:36,112 WARN L197 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 29 [2020-12-02 14:37:38,178 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_#t~nondet12_8| (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~nondet13_8| (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) |v_ULTIMATE.start_main_#t~nondet13_8|) ((_ extract 30 23) |v_ULTIMATE.start_main_#t~nondet13_8|) ((_ extract 22 0) |v_ULTIMATE.start_main_#t~nondet13_8|))) (.cse1 (fp ((_ extract 31 31) |v_ULTIMATE.start_main_#t~nondet12_8|) ((_ extract 30 23) |v_ULTIMATE.start_main_#t~nondet12_8|) ((_ extract 22 0) |v_ULTIMATE.start_main_#t~nondet12_8|)))) (or (not (fp.leq (fp ((_ extract 31 31) c_ULTIMATE.start_main_~x~0) ((_ extract 30 23) c_ULTIMATE.start_main_~x~0) ((_ extract 22 0) c_ULTIMATE.start_main_~x~0)) .cse0)) (not (= .cse0 (fp.neg .cse1))) (not (= .cse1 ((_ to_fp 8 24) c_~CRM (/ 1.0 100000000000000000000.0))))))) (forall ((v_ULTIMATE.start_main_~y~0_7 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~nondet17_5| (_ BitVec 32))) (let ((.cse2 (fp ((_ extract 31 31) v_ULTIMATE.start_main_~y~0_7) ((_ extract 30 23) v_ULTIMATE.start_main_~y~0_7) ((_ extract 22 0) v_ULTIMATE.start_main_~y~0_7))) (.cse4 (fp ((_ extract 31 31) |v_ULTIMATE.start_main_#t~nondet17_5|) ((_ extract 30 23) |v_ULTIMATE.start_main_#t~nondet17_5|) ((_ extract 22 0) |v_ULTIMATE.start_main_#t~nondet17_5|)))) (or (not (= .cse2 (let ((.cse3 (fp ((_ extract 31 31) c_ULTIMATE.start_main_~x~0) ((_ extract 30 23) c_ULTIMATE.start_main_~x~0) ((_ extract 22 0) c_ULTIMATE.start_main_~x~0)))) (fp.mul c_~CRM .cse3 .cse3)))) (not (fp.eq .cse2 .cse4)) (not (= .cse4 (_ +zero 8 24))))))) is different from true [2020-12-02 14:37:40,236 WARN L860 $PredicateComparison]: unable to prove that (or (not |c_ULTIMATE.start_main_#t~short11|) (forall ((|v_ULTIMATE.start_main_#t~nondet12_8| (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~nondet13_8| (_ BitVec 32))) (let ((.cse0 (fp ((_ extract 31 31) |v_ULTIMATE.start_main_#t~nondet13_8|) ((_ extract 30 23) |v_ULTIMATE.start_main_#t~nondet13_8|) ((_ extract 22 0) |v_ULTIMATE.start_main_#t~nondet13_8|))) (.cse1 (fp ((_ extract 31 31) |v_ULTIMATE.start_main_#t~nondet12_8|) ((_ extract 30 23) |v_ULTIMATE.start_main_#t~nondet12_8|) ((_ extract 22 0) |v_ULTIMATE.start_main_#t~nondet12_8|)))) (or (not (fp.leq (fp ((_ extract 31 31) c_ULTIMATE.start_main_~x~0) ((_ extract 30 23) c_ULTIMATE.start_main_~x~0) ((_ extract 22 0) c_ULTIMATE.start_main_~x~0)) .cse0)) (not (= .cse0 (fp.neg .cse1))) (not (= .cse1 ((_ to_fp 8 24) c_~CRM (/ 1.0 100000000000000000000.0))))))) (forall ((v_ULTIMATE.start_main_~y~0_7 (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~nondet17_5| (_ BitVec 32))) (let ((.cse2 (fp ((_ extract 31 31) v_ULTIMATE.start_main_~y~0_7) ((_ extract 30 23) v_ULTIMATE.start_main_~y~0_7) ((_ extract 22 0) v_ULTIMATE.start_main_~y~0_7))) (.cse4 (fp ((_ extract 31 31) |v_ULTIMATE.start_main_#t~nondet17_5|) ((_ extract 30 23) |v_ULTIMATE.start_main_#t~nondet17_5|) ((_ extract 22 0) |v_ULTIMATE.start_main_#t~nondet17_5|)))) (or (not (= .cse2 (let ((.cse3 (fp ((_ extract 31 31) c_ULTIMATE.start_main_~x~0) ((_ extract 30 23) c_ULTIMATE.start_main_~x~0) ((_ extract 22 0) c_ULTIMATE.start_main_~x~0)))) (fp.mul c_~CRM .cse3 .cse3)))) (not (fp.eq .cse2 .cse4)) (not (= .cse4 (_ +zero 8 24))))))) is different from true [2020-12-02 14:37:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:37:41,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320591716] [2020-12-02 14:37:41,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 14:37:41,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2020-12-02 14:37:41,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766633898] [2020-12-02 14:37:41,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-02 14:37:41,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 14:37:41,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-02 14:37:41,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=51, Unknown=4, NotChecked=30, Total=110 [2020-12-02 14:37:41,666 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 11 states. [2020-12-02 14:37:52,355 WARN L197 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-02 14:37:58,846 WARN L197 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 32 [2020-12-02 14:38:07,551 WARN L197 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 50 [2020-12-02 14:38:16,054 WARN L197 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 55 [2020-12-02 14:38:20,352 WARN L197 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-02 14:38:20,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:38:20,355 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2020-12-02 14:38:20,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-02 14:38:20,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-02 14:38:20,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:38:20,356 INFO L225 Difference]: With dead ends: 18 [2020-12-02 14:38:20,356 INFO L226 Difference]: Without dead ends: 0 [2020-12-02 14:38:20,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=60, Invalid=125, Unknown=5, NotChecked=50, Total=240 [2020-12-02 14:38:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-02 14:38:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-02 14:38:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-02 14:38:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-02 14:38:20,359 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-12-02 14:38:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:38:20,359 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-02 14:38:20,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-02 14:38:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-02 14:38:20,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-02 14:38:20,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-02 14:38:20,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-02 14:38:20,622 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-02 14:38:20,623 INFO L265 CegarLoopResult]: At program point L27(lines 15 28) the Hoare annotation is: true [2020-12-02 14:38:20,623 INFO L262 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-12-02 14:38:20,624 INFO L262 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-12-02 14:38:20,624 INFO L262 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-12-02 14:38:20,624 INFO L265 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: true [2020-12-02 14:38:20,624 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-02 14:38:20,624 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-02 14:38:20,625 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-02 14:38:20,625 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-12-02 14:38:20,625 INFO L262 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-12-02 14:38:20,628 INFO L262 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-12-02 14:38:20,629 INFO L262 CegarLoopResult]: For program point L22-2(lines 22 26) no Hoare annotation was computed. [2020-12-02 14:38:20,629 INFO L262 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-12-02 14:38:20,629 INFO L262 CegarLoopResult]: For program point L22-4(lines 22 26) no Hoare annotation was computed. [2020-12-02 14:38:20,629 INFO L262 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-12-02 14:38:20,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:38:20 BoogieIcfgContainer [2020-12-02 14:38:20,639 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 14:38:20,640 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 14:38:20,641 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 14:38:20,641 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 14:38:20,642 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:37:13" (3/4) ... [2020-12-02 14:38:20,646 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-02 14:38:20,661 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-02 14:38:20,661 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-02 14:38:20,662 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-02 14:38:20,662 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-02 14:38:20,717 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-02 14:38:20,717 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 14:38:20,719 INFO L168 Benchmark]: Toolchain (without parser) took 69873.68 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.3 MB in the beginning and 33.8 MB in the end (delta: -12.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:38:20,720 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 44.0 MB. Free memory is still 26.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:38:20,720 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.46 ms. Allocated memory is still 44.0 MB. Free memory was 21.1 MB in the beginning and 19.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-12-02 14:38:20,721 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.36 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.8 MB in the beginning and 38.6 MB in the end (delta: -18.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-12-02 14:38:20,722 INFO L168 Benchmark]: Boogie Preprocessor took 42.53 ms. Allocated memory is still 54.5 MB. Free memory was 38.6 MB in the beginning and 37.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:38:20,723 INFO L168 Benchmark]: RCFGBuilder took 1988.79 ms. Allocated memory is still 54.5 MB. Free memory was 37.2 MB in the beginning and 23.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-02 14:38:20,723 INFO L168 Benchmark]: TraceAbstraction took 67375.03 ms. Allocated memory is still 54.5 MB. Free memory was 22.9 MB in the beginning and 36.6 MB in the end (delta: -13.8 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. [2020-12-02 14:38:20,724 INFO L168 Benchmark]: Witness Printer took 76.86 ms. Allocated memory is still 54.5 MB. Free memory was 36.6 MB in the beginning and 33.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:38:20,728 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 44.0 MB. Free memory is still 26.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 324.46 ms. Allocated memory is still 44.0 MB. Free memory was 21.1 MB in the beginning and 19.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.36 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.8 MB in the beginning and 38.6 MB in the end (delta: -18.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.53 ms. Allocated memory is still 54.5 MB. Free memory was 38.6 MB in the beginning and 37.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1988.79 ms. Allocated memory is still 54.5 MB. Free memory was 37.2 MB in the beginning and 23.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 67375.03 ms. Allocated memory is still 54.5 MB. Free memory was 22.9 MB in the beginning and 36.6 MB in the end (delta: -13.8 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. * Witness Printer took 76.86 ms. Allocated memory is still 54.5 MB. Free memory was 36.6 MB in the beginning and 33.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 67.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 38.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 22 SDtfs, 14 SDslu, 12 SDs, 0 SdLazy, 41 SolverSat, 16 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 19.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 43.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 27.6s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 36 ConstructedInterpolants, 12 QuantifiedInterpolants, 10566 SizeOfPredicates, 9 NumberOfNonLiveVariables, 86 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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 correct! Received shutdown request...