./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1252b.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-newlib/double_req_bl_1252b.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 a6231fe9945ed231781bef28be0893007c672b08 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-newlib/double_req_bl_1252b.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 a6231fe9945ed231781bef28be0893007c672b08 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-2880296 [2020-12-02 15:35:30,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 15:35:30,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 15:35:30,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 15:35:30,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 15:35:30,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 15:35:30,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 15:35:30,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 15:35:30,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 15:35:30,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 15:35:30,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 15:35:30,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 15:35:30,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 15:35:30,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 15:35:30,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 15:35:30,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 15:35:30,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 15:35:30,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 15:35:30,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 15:35:30,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 15:35:30,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 15:35:30,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 15:35:30,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 15:35:30,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 15:35:30,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 15:35:30,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 15:35:30,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 15:35:30,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 15:35:30,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 15:35:30,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 15:35:30,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 15:35:30,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 15:35:30,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 15:35:30,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 15:35:30,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 15:35:30,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 15:35:30,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 15:35:30,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 15:35:30,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 15:35:30,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 15:35:30,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 15:35:30,978 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-02 15:35:31,009 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 15:35:31,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 15:35:31,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 15:35:31,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 15:35:31,011 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 15:35:31,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 15:35:31,012 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 15:35:31,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-02 15:35:31,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 15:35:31,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 15:35:31,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 15:35:31,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 15:35:31,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 15:35:31,013 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 15:35:31,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 15:35:31,014 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 15:35:31,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 15:35:31,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 15:35:31,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 15:35:31,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 15:35:31,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 15:35:31,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 15:35:31,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 15:35:31,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 15:35:31,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 15:35:31,016 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-02 15:35:31,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-02 15:35:31,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 15:35:31,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 15:35:31,017 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6231fe9945ed231781bef28be0893007c672b08 [2020-12-02 15:35:31,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 15:35:31,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 15:35:31,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 15:35:31,515 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 15:35:31,516 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 15:35:31,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1252b.c [2020-12-02 15:35:31,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14c83991/a429c4825b5d421abd38b8a516fd71c5/FLAGbff8add12 [2020-12-02 15:35:32,132 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 15:35:32,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1252b.c [2020-12-02 15:35:32,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14c83991/a429c4825b5d421abd38b8a516fd71c5/FLAGbff8add12 [2020-12-02 15:35:32,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14c83991/a429c4825b5d421abd38b8a516fd71c5 [2020-12-02 15:35:32,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 15:35:32,512 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 15:35:32,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 15:35:32,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 15:35:32,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 15:35:32,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:35:32" (1/1) ... [2020-12-02 15:35:32,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd17898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:32, skipping insertion in model container [2020-12-02 15:35:32,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:35:32" (1/1) ... [2020-12-02 15:35:32,530 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 15:35:32,548 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 15:35:32,772 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-newlib/double_req_bl_1252b.c[2154,2167] [2020-12-02 15:35:32,775 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 15:35:32,785 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 15:35:32,815 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-newlib/double_req_bl_1252b.c[2154,2167] [2020-12-02 15:35:32,816 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 15:35:32,833 INFO L217 MainTranslator]: Completed translation [2020-12-02 15:35:32,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:32 WrapperNode [2020-12-02 15:35:32,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 15:35:32,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 15:35:32,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 15:35:32,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 15:35:32,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:32" (1/1) ... [2020-12-02 15:35:32,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:32" (1/1) ... [2020-12-02 15:35:32,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 15:35:32,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 15:35:32,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 15:35:32,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 15:35:32,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:32" (1/1) ... [2020-12-02 15:35:32,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:32" (1/1) ... [2020-12-02 15:35:32,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:32" (1/1) ... [2020-12-02 15:35:32,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:32" (1/1) ... [2020-12-02 15:35:32,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:32" (1/1) ... [2020-12-02 15:35:32,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:32" (1/1) ... [2020-12-02 15:35:32,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:32" (1/1) ... [2020-12-02 15:35:32,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 15:35:32,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 15:35:32,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 15:35:32,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 15:35:32,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:32" (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 15:35:33,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-02 15:35:33,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 15:35:33,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-02 15:35:33,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 15:35:33,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 15:35:33,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-02 15:35:33,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 15:35:33,414 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 15:35:33,414 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-02 15:35:33,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:35:33 BoogieIcfgContainer [2020-12-02 15:35:33,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 15:35:33,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 15:35:33,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 15:35:33,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 15:35:33,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:35:32" (1/3) ... [2020-12-02 15:35:33,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1948e8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:35:33, skipping insertion in model container [2020-12-02 15:35:33,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:32" (2/3) ... [2020-12-02 15:35:33,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1948e8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:35:33, skipping insertion in model container [2020-12-02 15:35:33,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:35:33" (3/3) ... [2020-12-02 15:35:33,425 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2020-12-02 15:35:33,444 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 15:35:33,448 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 15:35:33,463 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 15:35:33,498 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 15:35:33,499 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 15:35:33,499 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 15:35:33,499 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 15:35:33,499 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 15:35:33,499 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 15:35:33,500 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 15:35:33,500 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 15:35:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-02 15:35:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 15:35:33,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 15:35:33,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 15:35:33,526 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 15:35:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 15:35:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-12-02 15:35:33,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 15:35:33,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161121024] [2020-12-02 15:35:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 15:35:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 15:35:33,816 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 15:35:33,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161121024] [2020-12-02 15:35:33,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 15:35:33,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 15:35:33,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504647752] [2020-12-02 15:35:33,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 15:35:33,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 15:35:33,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 15:35:33,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 15:35:33,845 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-02 15:35:33,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 15:35:33,868 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2020-12-02 15:35:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 15:35:33,870 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-02 15:35:33,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 15:35:33,881 INFO L225 Difference]: With dead ends: 62 [2020-12-02 15:35:33,882 INFO L226 Difference]: Without dead ends: 29 [2020-12-02 15:35:33,885 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 15:35:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-02 15:35:33,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-02 15:35:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-02 15:35:33,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-12-02 15:35:33,930 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-12-02 15:35:33,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 15:35:33,931 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-12-02 15:35:33,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 15:35:33,931 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-12-02 15:35:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-02 15:35:33,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 15:35:33,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 15:35:33,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-02 15:35:33,933 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 15:35:33,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 15:35:33,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-12-02 15:35:33,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 15:35:33,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483383069] [2020-12-02 15:35:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 15:35:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 15:35:34,062 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 15:35:34,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483383069] [2020-12-02 15:35:34,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 15:35:34,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 15:35:34,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768386919] [2020-12-02 15:35:34,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 15:35:34,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 15:35:34,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 15:35:34,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 15:35:34,071 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-12-02 15:35:34,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 15:35:34,181 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-02 15:35:34,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 15:35:34,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-02 15:35:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 15:35:34,183 INFO L225 Difference]: With dead ends: 53 [2020-12-02 15:35:34,184 INFO L226 Difference]: Without dead ends: 44 [2020-12-02 15:35:34,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-02 15:35:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-02 15:35:34,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-12-02 15:35:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-02 15:35:34,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-02 15:35:34,200 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-12-02 15:35:34,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 15:35:34,201 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-02 15:35:34,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 15:35:34,202 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-02 15:35:34,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-02 15:35:34,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 15:35:34,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 15:35:34,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-02 15:35:34,205 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 15:35:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 15:35:34,206 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-12-02 15:35:34,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 15:35:34,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335777029] [2020-12-02 15:35:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 15:35:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 15:35:34,323 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 15:35:34,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335777029] [2020-12-02 15:35:34,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 15:35:34,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 15:35:34,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056542208] [2020-12-02 15:35:34,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 15:35:34,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 15:35:34,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 15:35:34,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 15:35:34,326 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-02 15:35:34,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 15:35:34,379 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-12-02 15:35:34,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 15:35:34,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-02 15:35:34,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 15:35:34,381 INFO L225 Difference]: With dead ends: 55 [2020-12-02 15:35:34,381 INFO L226 Difference]: Without dead ends: 46 [2020-12-02 15:35:34,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-02 15:35:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-02 15:35:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-12-02 15:35:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-02 15:35:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-02 15:35:34,388 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-12-02 15:35:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 15:35:34,388 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-02 15:35:34,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 15:35:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-02 15:35:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-02 15:35:34,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 15:35:34,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 15:35:34,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-02 15:35:34,390 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 15:35:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 15:35:34,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-12-02 15:35:34,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 15:35:34,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753094651] [2020-12-02 15:35:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 15:35:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 15:35:34,445 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 15:35:34,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753094651] [2020-12-02 15:35:34,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 15:35:34,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 15:35:34,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421903989] [2020-12-02 15:35:34,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 15:35:34,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 15:35:34,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 15:35:34,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 15:35:34,448 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-02 15:35:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 15:35:34,496 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-12-02 15:35:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 15:35:34,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-02 15:35:34,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 15:35:34,498 INFO L225 Difference]: With dead ends: 57 [2020-12-02 15:35:34,498 INFO L226 Difference]: Without dead ends: 48 [2020-12-02 15:35:34,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-02 15:35:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-02 15:35:34,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-12-02 15:35:34,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-02 15:35:34,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-02 15:35:34,505 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-12-02 15:35:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 15:35:34,505 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-02 15:35:34,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 15:35:34,505 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-02 15:35:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-02 15:35:34,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 15:35:34,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 15:35:34,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-02 15:35:34,507 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 15:35:34,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 15:35:34,507 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-12-02 15:35:34,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 15:35:34,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999434546] [2020-12-02 15:35:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 15:35:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 15:35:34,559 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 15:35:34,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999434546] [2020-12-02 15:35:34,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 15:35:34,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 15:35:34,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58960794] [2020-12-02 15:35:34,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 15:35:34,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 15:35:34,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 15:35:34,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 15:35:34,562 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-02 15:35:34,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 15:35:34,618 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-12-02 15:35:34,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 15:35:34,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-02 15:35:34,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 15:35:34,619 INFO L225 Difference]: With dead ends: 55 [2020-12-02 15:35:34,620 INFO L226 Difference]: Without dead ends: 46 [2020-12-02 15:35:34,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-02 15:35:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-02 15:35:34,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-12-02 15:35:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-02 15:35:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-02 15:35:34,626 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-12-02 15:35:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 15:35:34,626 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-02 15:35:34,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 15:35:34,626 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-02 15:35:34,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-02 15:35:34,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 15:35:34,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 15:35:34,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-02 15:35:34,628 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 15:35:34,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 15:35:34,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-12-02 15:35:34,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 15:35:34,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337833426] [2020-12-02 15:35:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 15:35:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 15:35:34,661 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 15:35:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 15:35:34,686 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 15:35:34,714 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-02 15:35:34,714 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 15:35:34,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-02 15:35:34,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 03:35:34 BoogieIcfgContainer [2020-12-02 15:35:34,773 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 15:35:34,774 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 15:35:34,775 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 15:35:34,775 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 15:35:34,776 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:35:33" (3/4) ... [2020-12-02 15:35:34,779 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-02 15:35:34,780 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 15:35:34,784 INFO L168 Benchmark]: Toolchain (without parser) took 2270.01 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 33.6 MB in the beginning and 33.5 MB in the end (delta: 78.7 kB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-12-02 15:35:34,786 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 52.4 MB. Free memory was 36.2 MB in the beginning and 36.2 MB in the end (delta: 40.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 15:35:34,788 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.70 ms. Allocated memory is still 52.4 MB. Free memory was 33.4 MB in the beginning and 32.8 MB in the end (delta: 561.0 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-02 15:35:34,797 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.41 ms. Allocated memory is still 52.4 MB. Free memory was 32.8 MB in the beginning and 30.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 15:35:34,798 INFO L168 Benchmark]: Boogie Preprocessor took 36.85 ms. Allocated memory is still 52.4 MB. Free memory was 30.9 MB in the beginning and 29.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 15:35:34,801 INFO L168 Benchmark]: RCFGBuilder took 495.01 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 29.5 MB in the beginning and 32.1 MB in the end (delta: -2.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2020-12-02 15:35:34,803 INFO L168 Benchmark]: TraceAbstraction took 1355.57 ms. Allocated memory is still 62.9 MB. Free memory was 31.8 MB in the beginning and 33.9 MB in the end (delta: -2.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 16.1 GB. [2020-12-02 15:35:34,803 INFO L168 Benchmark]: Witness Printer took 5.99 ms. Allocated memory is still 62.9 MB. Free memory was 33.9 MB in the beginning and 33.5 MB in the end (delta: 453.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 15:35:34,816 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 52.4 MB. Free memory was 36.2 MB in the beginning and 36.2 MB in the end (delta: 40.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 320.70 ms. Allocated memory is still 52.4 MB. Free memory was 33.4 MB in the beginning and 32.8 MB in the end (delta: 561.0 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.41 ms. Allocated memory is still 52.4 MB. Free memory was 32.8 MB in the beginning and 30.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.85 ms. Allocated memory is still 52.4 MB. Free memory was 30.9 MB in the beginning and 29.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 495.01 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 29.5 MB in the beginning and 32.1 MB in the end (delta: -2.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1355.57 ms. Allocated memory is still 62.9 MB. Free memory was 31.8 MB in the beginning and 33.9 MB in the end (delta: -2.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 16.1 GB. * Witness Printer took 5.99 ms. Allocated memory is still 62.9 MB. Free memory was 33.9 MB in the beginning and 33.5 MB in the end (delta: 453.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 87]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someUnaryDOUBLE_SMToperation at line 82, overapproximation of someBinaryDOUBLE_SMTComparisonOperation at line 86. Possible FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L38-L39] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L41-L42] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L45-L46] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L49] return 0; [L54] COND TRUE __fpclassify_double(x) == 0 [L55] return y; [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L87] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 15:35:37,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 15:35:37,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 15:35:37,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 15:35:37,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 15:35:37,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 15:35:37,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 15:35:37,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 15:35:37,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 15:35:37,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 15:35:37,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 15:35:37,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 15:35:37,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 15:35:37,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 15:35:37,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 15:35:37,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 15:35:37,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 15:35:37,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 15:35:37,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 15:35:37,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 15:35:37,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 15:35:37,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 15:35:37,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 15:35:37,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 15:35:37,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 15:35:37,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 15:35:37,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 15:35:37,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 15:35:37,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 15:35:37,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 15:35:37,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 15:35:37,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 15:35:37,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 15:35:37,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 15:35:37,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 15:35:37,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 15:35:37,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 15:35:37,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 15:35:37,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 15:35:37,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 15:35:37,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 15:35:37,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-02 15:35:37,588 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 15:35:37,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 15:35:37,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 15:35:37,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 15:35:37,593 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 15:35:37,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 15:35:37,593 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 15:35:37,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 15:35:37,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 15:35:37,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 15:35:37,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 15:35:37,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 15:35:37,596 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-02 15:35:37,596 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-02 15:35:37,596 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 15:35:37,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 15:35:37,596 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 15:35:37,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 15:35:37,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 15:35:37,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 15:35:37,598 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 15:35:37,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 15:35:37,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 15:35:37,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 15:35:37,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 15:35:37,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 15:35:37,599 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-02 15:35:37,599 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-02 15:35:37,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 15:35:37,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 15:35:37,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-02 15:35:37,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6231fe9945ed231781bef28be0893007c672b08 [2020-12-02 15:35:38,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 15:35:38,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 15:35:38,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 15:35:38,097 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 15:35:38,098 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 15:35:38,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1252b.c [2020-12-02 15:35:38,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1d1e8117/7719f4f0f1e847649539cde725bbf6aa/FLAG76bb550c1 [2020-12-02 15:35:38,763 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 15:35:38,764 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1252b.c [2020-12-02 15:35:38,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1d1e8117/7719f4f0f1e847649539cde725bbf6aa/FLAG76bb550c1 [2020-12-02 15:35:39,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1d1e8117/7719f4f0f1e847649539cde725bbf6aa [2020-12-02 15:35:39,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 15:35:39,137 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 15:35:39,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 15:35:39,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 15:35:39,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 15:35:39,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:35:39" (1/1) ... [2020-12-02 15:35:39,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e48cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:39, skipping insertion in model container [2020-12-02 15:35:39,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:35:39" (1/1) ... [2020-12-02 15:35:39,158 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 15:35:39,177 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 15:35:39,381 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-newlib/double_req_bl_1252b.c[2154,2167] [2020-12-02 15:35:39,385 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 15:35:39,403 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 15:35:39,440 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-newlib/double_req_bl_1252b.c[2154,2167] [2020-12-02 15:35:39,443 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 15:35:39,469 INFO L217 MainTranslator]: Completed translation [2020-12-02 15:35:39,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:39 WrapperNode [2020-12-02 15:35:39,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 15:35:39,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 15:35:39,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 15:35:39,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 15:35:39,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:39" (1/1) ... [2020-12-02 15:35:39,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:39" (1/1) ... [2020-12-02 15:35:39,527 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 15:35:39,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 15:35:39,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 15:35:39,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 15:35:39,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:39" (1/1) ... [2020-12-02 15:35:39,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:39" (1/1) ... [2020-12-02 15:35:39,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:39" (1/1) ... [2020-12-02 15:35:39,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:39" (1/1) ... [2020-12-02 15:35:39,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:39" (1/1) ... [2020-12-02 15:35:39,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:39" (1/1) ... [2020-12-02 15:35:39,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:39" (1/1) ... [2020-12-02 15:35:39,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 15:35:39,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 15:35:39,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 15:35:39,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 15:35:39,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:39" (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 15:35:39,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_DOUBLE [2020-12-02 15:35:39,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-12-02 15:35:39,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-02 15:35:39,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 15:35:39,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-02 15:35:39,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 15:35:39,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 15:35:39,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 15:35:40,182 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 15:35:40,183 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-02 15:35:40,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:35:40 BoogieIcfgContainer [2020-12-02 15:35:40,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 15:35:40,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 15:35:40,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 15:35:40,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 15:35:40,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:35:39" (1/3) ... [2020-12-02 15:35:40,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660a62ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:35:40, skipping insertion in model container [2020-12-02 15:35:40,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:35:39" (2/3) ... [2020-12-02 15:35:40,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660a62ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:35:40, skipping insertion in model container [2020-12-02 15:35:40,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:35:40" (3/3) ... [2020-12-02 15:35:40,197 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2020-12-02 15:35:40,215 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 15:35:40,221 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 15:35:40,235 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 15:35:40,268 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 15:35:40,268 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 15:35:40,269 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 15:35:40,269 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 15:35:40,269 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 15:35:40,269 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 15:35:40,270 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 15:35:40,270 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 15:35:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-02 15:35:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-02 15:35:40,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 15:35:40,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 15:35:40,295 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 15:35:40,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 15:35:40,304 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-12-02 15:35:40,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 15:35:40,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857399509] [2020-12-02 15:35:40,320 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 15:35:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 15:35:40,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-02 15:35:40,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 15:35:40,538 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 15:35:40,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 15:35:40,558 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 15:35:40,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857399509] [2020-12-02 15:35:40,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 15:35:40,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-02 15:35:40,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602263194] [2020-12-02 15:35:40,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 15:35:40,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 15:35:40,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 15:35:40,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 15:35:40,587 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-02 15:35:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 15:35:40,610 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2020-12-02 15:35:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 15:35:40,612 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-02 15:35:40,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 15:35:40,624 INFO L225 Difference]: With dead ends: 62 [2020-12-02 15:35:40,624 INFO L226 Difference]: Without dead ends: 29 [2020-12-02 15:35:40,628 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 15:35:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-02 15:35:40,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-02 15:35:40,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-02 15:35:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-12-02 15:35:40,671 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-12-02 15:35:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 15:35:40,672 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-12-02 15:35:40,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 15:35:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-12-02 15:35:40,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-02 15:35:40,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 15:35:40,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 15:35:40,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-02 15:35:40,887 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 15:35:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 15:35:40,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-12-02 15:35:40,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 15:35:40,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234464253] [2020-12-02 15:35:40,891 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 15:35:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 15:35:41,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-02 15:35:41,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 15:35:41,097 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 15:35:41,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 15:35:41,142 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 15:35:41,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234464253] [2020-12-02 15:35:41,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 15:35:41,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-12-02 15:35:41,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928538228] [2020-12-02 15:35:41,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-02 15:35:41,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 15:35:41,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-02 15:35:41,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-02 15:35:41,147 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-12-02 15:35:41,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 15:35:41,278 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-12-02 15:35:41,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-02 15:35:41,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-02 15:35:41,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 15:35:41,280 INFO L225 Difference]: With dead ends: 68 [2020-12-02 15:35:41,280 INFO L226 Difference]: Without dead ends: 59 [2020-12-02 15:35:41,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-02 15:35:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-02 15:35:41,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-12-02 15:35:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-02 15:35:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-02 15:35:41,290 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-12-02 15:35:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 15:35:41,290 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-02 15:35:41,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-02 15:35:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-02 15:35:41,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-02 15:35:41,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 15:35:41,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 15:35:41,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-02 15:35:41,515 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 15:35:41,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 15:35:41,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-12-02 15:35:41,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 15:35:41,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580368259] [2020-12-02 15:35:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-02 15:35:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 15:35:41,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-02 15:35:41,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 15:35:41,840 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 15:35:41,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 15:35:41,916 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 15:35:41,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580368259] [2020-12-02 15:35:41,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 15:35:41,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-12-02 15:35:41,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588450789] [2020-12-02 15:35:41,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-02 15:35:41,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 15:35:41,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-02 15:35:41,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-02 15:35:41,920 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 6 states. [2020-12-02 15:35:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 15:35:42,064 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-12-02 15:35:42,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 15:35:42,068 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-02 15:35:42,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 15:35:42,069 INFO L225 Difference]: With dead ends: 52 [2020-12-02 15:35:42,069 INFO L226 Difference]: Without dead ends: 28 [2020-12-02 15:35:42,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-02 15:35:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-02 15:35:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-02 15:35:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-02 15:35:42,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-12-02 15:35:42,085 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2020-12-02 15:35:42,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 15:35:42,086 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-12-02 15:35:42,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-02 15:35:42,086 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-12-02 15:35:42,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-02 15:35:42,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 15:35:42,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 15:35:42,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-02 15:35:42,309 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 15:35:42,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 15:35:42,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-12-02 15:35:42,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 15:35:42,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159854277] [2020-12-02 15:35:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-02 15:35:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 15:35:42,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-02 15:35:42,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 15:35:42,508 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 15:35:42,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 15:35:42,562 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 15:35:42,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159854277] [2020-12-02 15:35:42,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 15:35:42,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-12-02 15:35:42,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483669941] [2020-12-02 15:35:42,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-02 15:35:42,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 15:35:42,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-02 15:35:42,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-02 15:35:42,577 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 6 states. [2020-12-02 15:35:42,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 15:35:42,691 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-12-02 15:35:42,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-02 15:35:42,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-02 15:35:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 15:35:42,695 INFO L225 Difference]: With dead ends: 65 [2020-12-02 15:35:42,695 INFO L226 Difference]: Without dead ends: 56 [2020-12-02 15:35:42,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-02 15:35:42,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-02 15:35:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2020-12-02 15:35:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-02 15:35:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-02 15:35:42,703 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2020-12-02 15:35:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 15:35:42,704 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-02 15:35:42,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-02 15:35:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-02 15:35:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-02 15:35:42,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 15:35:42,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 15:35:42,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-02 15:35:42,919 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 15:35:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 15:35:42,921 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-12-02 15:35:42,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 15:35:42,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996052604] [2020-12-02 15:35:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-02 15:35:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 15:35:43,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-02 15:35:43,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 15:35:43,284 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 15:35:43,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 15:35:43,372 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 15:35:43,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996052604] [2020-12-02 15:35:43,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 15:35:43,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-12-02 15:35:43,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870413966] [2020-12-02 15:35:43,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 15:35:43,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 15:35:43,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 15:35:43,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-02 15:35:43,376 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2020-12-02 15:35:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 15:35:43,398 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-12-02 15:35:43,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-02 15:35:43,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-02 15:35:43,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 15:35:43,400 INFO L225 Difference]: With dead ends: 40 [2020-12-02 15:35:43,400 INFO L226 Difference]: Without dead ends: 30 [2020-12-02 15:35:43,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-02 15:35:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-02 15:35:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-02 15:35:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-02 15:35:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-02 15:35:43,408 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2020-12-02 15:35:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 15:35:43,409 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-02 15:35:43,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 15:35:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-02 15:35:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-02 15:35:43,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 15:35:43,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 15:35:43,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-02 15:35:43,626 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 15:35:43,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 15:35:43,628 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-12-02 15:35:43,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 15:35:43,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312858589] [2020-12-02 15:35:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-02 15:35:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 15:35:43,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-02 15:35:43,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 15:35:43,987 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 15:35:43,991 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 15:35:43,993 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-02 15:35:44,026 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 15:35:44,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 15:35:44,253 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 15:35:44,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312858589] [2020-12-02 15:35:44,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 15:35:44,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-12-02 15:35:44,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917437546] [2020-12-02 15:35:44,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-02 15:35:44,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 15:35:44,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-02 15:35:44,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-02 15:35:44,257 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 9 states. [2020-12-02 15:35:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 15:35:44,662 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-02 15:35:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-02 15:35:44,663 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-12-02 15:35:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 15:35:44,664 INFO L225 Difference]: With dead ends: 42 [2020-12-02 15:35:44,664 INFO L226 Difference]: Without dead ends: 39 [2020-12-02 15:35:44,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-02 15:35:44,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-02 15:35:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-12-02 15:35:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-02 15:35:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-12-02 15:35:44,685 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 18 [2020-12-02 15:35:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 15:35:44,686 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-12-02 15:35:44,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-02 15:35:44,688 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-12-02 15:35:44,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-02 15:35:44,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 15:35:44,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 15:35:44,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-02 15:35:44,890 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 15:35:44,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 15:35:44,891 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-12-02 15:35:44,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 15:35:44,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740119793] [2020-12-02 15:35:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-02 15:35:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 15:35:45,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-02 15:35:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 15:35:45,240 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 15:35:45,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 15:35:45,396 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 15:35:45,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740119793] [2020-12-02 15:35:45,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 15:35:45,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2020-12-02 15:35:45,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051945866] [2020-12-02 15:35:45,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-02 15:35:45,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 15:35:45,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-02 15:35:45,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-02 15:35:45,400 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2020-12-02 15:35:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 15:35:45,591 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-12-02 15:35:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-02 15:35:45,602 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-02 15:35:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 15:35:45,603 INFO L225 Difference]: With dead ends: 45 [2020-12-02 15:35:45,604 INFO L226 Difference]: Without dead ends: 27 [2020-12-02 15:35:45,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-02 15:35:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-02 15:35:45,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-02 15:35:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-02 15:35:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-02 15:35:45,612 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2020-12-02 15:35:45,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 15:35:45,612 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-02 15:35:45,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-02 15:35:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-02 15:35:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-02 15:35:45,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 15:35:45,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 15:35:45,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-02 15:35:45,830 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 15:35:45,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 15:35:45,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-12-02 15:35:45,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 15:35:45,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418861928] [2020-12-02 15:35:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-02 15:35:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 15:35:46,052 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 15:35:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 15:35:46,288 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 15:35:46,363 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-02 15:35:46,363 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 15:35:46,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-02 15:35:46,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 03:35:46 BoogieIcfgContainer [2020-12-02 15:35:46,613 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 15:35:46,614 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 15:35:46,614 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 15:35:46,614 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 15:35:46,615 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:35:40" (3/4) ... [2020-12-02 15:35:46,617 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-02 15:35:46,677 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-02 15:35:46,678 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 15:35:46,680 INFO L168 Benchmark]: Toolchain (without parser) took 7542.16 ms. Allocated memory was 48.2 MB in the beginning and 86.0 MB in the end (delta: 37.7 MB). Free memory was 25.0 MB in the beginning and 44.3 MB in the end (delta: -19.4 MB). Peak memory consumption was 21.8 MB. Max. memory is 16.1 GB. [2020-12-02 15:35:46,681 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 48.2 MB. Free memory was 31.1 MB in the beginning and 31.0 MB in the end (delta: 84.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 15:35:46,681 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.81 ms. Allocated memory is still 48.2 MB. Free memory was 24.8 MB in the beginning and 26.5 MB in the end (delta: -1.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2020-12-02 15:35:46,682 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.54 ms. Allocated memory is still 48.2 MB. Free memory was 26.5 MB in the beginning and 24.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 15:35:46,683 INFO L168 Benchmark]: Boogie Preprocessor took 53.90 ms. Allocated memory is still 48.2 MB. Free memory was 24.5 MB in the beginning and 22.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 15:35:46,683 INFO L168 Benchmark]: RCFGBuilder took 602.51 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.7 MB in the beginning and 36.7 MB in the end (delta: -14.0 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. [2020-12-02 15:35:46,684 INFO L168 Benchmark]: TraceAbstraction took 6426.37 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 36.2 MB in the beginning and 47.3 MB in the end (delta: -11.1 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2020-12-02 15:35:46,685 INFO L168 Benchmark]: Witness Printer took 63.68 ms. Allocated memory is still 86.0 MB. Free memory was 47.3 MB in the beginning and 44.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-02 15:35:46,689 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 48.2 MB. Free memory was 31.1 MB in the beginning and 31.0 MB in the end (delta: 84.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 330.81 ms. Allocated memory is still 48.2 MB. Free memory was 24.8 MB in the beginning and 26.5 MB in the end (delta: -1.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.54 ms. Allocated memory is still 48.2 MB. Free memory was 26.5 MB in the beginning and 24.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.90 ms. Allocated memory is still 48.2 MB. Free memory was 24.5 MB in the beginning and 22.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 602.51 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.7 MB in the beginning and 36.7 MB in the end (delta: -14.0 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6426.37 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 36.2 MB in the beginning and 47.3 MB in the end (delta: -11.1 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. * Witness Printer took 63.68 ms. Allocated memory is still 86.0 MB. Free memory was 47.3 MB in the beginning and 44.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L81] EXPR 0.0 [L81] double x = 0.0; [L82] EXPR 0.0 [L82] EXPR -0.0 [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; [L54] COND FALSE !(__fpclassify_double(x) == 0) [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; [L56] COND FALSE !(__fpclassify_double(y) == 0) [L59] EXPR x > y ? x : y [L59] return x > y ? x : y; [L83] double res = fmax_double(x, y); [L86] EXPR 0.0 [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L63] __uint32_t msw; [L66] ieee_double_shape_type gh_u; [L67] gh_u.value = (x) [L68] EXPR gh_u.parts.msw [L68] (msw) = gh_u.parts.msw [L71] return (msw & 0x80000000) != 0; [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L87] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.3s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 290 SDslu, 362 SDs, 0 SdLazy, 112 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 7 MinimizatonAttempts, 61 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 51 QuantifiedInterpolants, 35042 SizeOfPredicates, 26 NumberOfNonLiveVariables, 427 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...