./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/floats-cbmc-regression/float2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ee8e70e7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-cbmc-regression/float2.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 069e404bf7b01a351383c4004538ba52022db96a ................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/floats-cbmc-regression/float2.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 069e404bf7b01a351383c4004538ba52022db96a ............................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-ee8e70e [2020-10-24 14:16:08,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:16:08,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:16:08,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:16:08,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:16:08,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:16:08,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:16:08,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:16:08,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:16:08,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:16:08,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:16:08,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:16:08,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:16:08,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:16:08,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:16:08,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:16:08,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:16:08,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:16:08,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:16:08,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:16:08,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:16:08,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:16:08,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:16:08,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:16:08,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:16:08,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:16:08,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:16:08,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:16:08,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:16:08,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:16:08,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:16:08,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:16:08,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:16:08,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:16:08,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:16:08,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:16:08,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:16:08,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:16:08,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:16:08,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:16:08,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:16:08,876 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 14:16:08,943 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:16:08,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:16:08,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:16:08,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:16:08,946 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:16:08,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:16:08,947 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:16:08,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 14:16:08,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:16:08,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:16:08,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:16:08,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:16:08,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:16:08,949 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:16:08,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:16:08,949 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:16:08,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:16:08,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:16:08,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:16:08,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:16:08,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:16:08,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:16:08,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:16:08,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:16:08,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:16:08,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 14:16:08,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 14:16:08,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:16:08,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:16:08,953 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 069e404bf7b01a351383c4004538ba52022db96a [2020-10-24 14:16:09,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:16:09,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:16:09,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:16:09,373 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:16:09,374 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:16:09,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cbmc-regression/float2.c [2020-10-24 14:16:09,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2842ccc3f/37fae3e4b19945bf810d4955cba0582c/FLAG2539c627c [2020-10-24 14:16:10,195 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:16:10,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/floats-cbmc-regression/float2.c [2020-10-24 14:16:10,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2842ccc3f/37fae3e4b19945bf810d4955cba0582c/FLAG2539c627c [2020-10-24 14:16:10,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2842ccc3f/37fae3e4b19945bf810d4955cba0582c [2020-10-24 14:16:10,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:16:10,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:16:10,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:16:10,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:16:10,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:16:10,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:16:10" (1/1) ... [2020-10-24 14:16:10,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e626ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:10, skipping insertion in model container [2020-10-24 14:16:10,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:16:10" (1/1) ... [2020-10-24 14:16:10,609 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:16:10,629 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:16:10,852 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:16:10,863 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:16:10,882 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:16:10,900 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:16:10,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:10 WrapperNode [2020-10-24 14:16:10,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:16:10,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:16:10,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:16:10,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:16:10,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:10" (1/1) ... [2020-10-24 14:16:10,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:10" (1/1) ... [2020-10-24 14:16:10,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:16:10,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:16:10,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:16:10,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:16:10,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:10" (1/1) ... [2020-10-24 14:16:10,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:10" (1/1) ... [2020-10-24 14:16:10,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:10" (1/1) ... [2020-10-24 14:16:10,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:10" (1/1) ... [2020-10-24 14:16:10,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:10" (1/1) ... [2020-10-24 14:16:10,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:10" (1/1) ... [2020-10-24 14:16:10,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:10" (1/1) ... [2020-10-24 14:16:10,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:16:10,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:16:10,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:16:10,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:16:10,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:16:11,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:16:11,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:16:11,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 14:16:11,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:16:11,312 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:16:11,313 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-24 14:16:11,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:16:11 BoogieIcfgContainer [2020-10-24 14:16:11,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:16:11,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:16:11,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:16:11,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:16:11,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:16:10" (1/3) ... [2020-10-24 14:16:11,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2104f608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:16:11, skipping insertion in model container [2020-10-24 14:16:11,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:10" (2/3) ... [2020-10-24 14:16:11,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2104f608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:16:11, skipping insertion in model container [2020-10-24 14:16:11,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:16:11" (3/3) ... [2020-10-24 14:16:11,327 INFO L111 eAbstractionObserver]: Analyzing ICFG float2.c [2020-10-24 14:16:11,343 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:16:11,348 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-10-24 14:16:11,364 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-24 14:16:11,397 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:16:11,397 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:16:11,397 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:16:11,398 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:16:11,398 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:16:11,398 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:16:11,398 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:16:11,399 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:16:11,416 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-24 14:16:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-24 14:16:11,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:16:11,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-24 14:16:11,423 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:16:11,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:16:11,437 INFO L82 PathProgramCache]: Analyzing trace with hash 925604, now seen corresponding path program 1 times [2020-10-24 14:16:11,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:16:11,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869960089] [2020-10-24 14:16:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:16:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:16:11,566 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:16:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:16:11,589 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:16:11,612 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 14:16:11,613 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 14:16:11,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 14:16:11,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:16:11 BoogieIcfgContainer [2020-10-24 14:16:11,637 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:16:11,638 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:16:11,638 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:16:11,639 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:16:11,639 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:16:11" (3/4) ... [2020-10-24 14:16:11,643 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 14:16:11,644 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:16:11,647 INFO L168 Benchmark]: Toolchain (without parser) took 1073.36 ms. Allocated memory is still 54.5 MB. Free memory was 38.8 MB in the beginning and 31.3 MB in the end (delta: 7.5 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-10-24 14:16:11,648 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 41.9 MB. Free memory was 26.6 MB in the beginning and 26.5 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:16:11,649 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.78 ms. Allocated memory is still 54.5 MB. Free memory was 38.2 MB in the beginning and 29.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-10-24 14:16:11,650 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.00 ms. Allocated memory is still 54.5 MB. Free memory was 29.1 MB in the beginning and 27.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:16:11,651 INFO L168 Benchmark]: Boogie Preprocessor took 24.18 ms. Allocated memory is still 54.5 MB. Free memory was 27.7 MB in the beginning and 26.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:16:11,652 INFO L168 Benchmark]: RCFGBuilder took 346.29 ms. Allocated memory is still 54.5 MB. Free memory was 26.7 MB in the beginning and 29.3 MB in the end (delta: -2.6 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:16:11,653 INFO L168 Benchmark]: TraceAbstraction took 320.05 ms. Allocated memory is still 54.5 MB. Free memory was 28.9 MB in the beginning and 31.6 MB in the end (delta: -2.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:16:11,654 INFO L168 Benchmark]: Witness Printer took 5.87 ms. Allocated memory is still 54.5 MB. Free memory was 31.6 MB in the beginning and 31.3 MB in the end (delta: 260.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:16:11,659 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 41.9 MB. Free memory was 26.6 MB in the beginning and 26.5 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 318.78 ms. Allocated memory is still 54.5 MB. Free memory was 38.2 MB in the beginning and 29.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.00 ms. Allocated memory is still 54.5 MB. Free memory was 29.1 MB in the beginning and 27.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.18 ms. Allocated memory is still 54.5 MB. Free memory was 27.7 MB in the beginning and 26.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 346.29 ms. Allocated memory is still 54.5 MB. Free memory was 26.7 MB in the beginning and 29.3 MB in the end (delta: -2.6 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 320.05 ms. Allocated memory is still 54.5 MB. Free memory was 28.9 MB in the beginning and 31.6 MB in the end (delta: -2.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.87 ms. Allocated memory is still 54.5 MB. Free memory was 31.6 MB in the beginning and 31.3 MB in the end (delta: 260.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLE_SMTComparisonOperation at line 12. Possible FailurePath: [L7] float a; [L8] double b; [L11] a=1.25L [L12] COND TRUE !(a==1.25) [L3] __assert_fail("0", "float2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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-ee8e70e [2020-10-24 14:16:14,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:16:14,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:16:14,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:16:14,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:16:14,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:16:14,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:16:14,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:16:14,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:16:14,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:16:14,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:16:14,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:16:14,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:16:14,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:16:14,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:16:14,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:16:14,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:16:14,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:16:14,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:16:14,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:16:14,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:16:14,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:16:14,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:16:14,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:16:14,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:16:14,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:16:14,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:16:14,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:16:14,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:16:14,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:16:14,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:16:14,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:16:14,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:16:14,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:16:14,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:16:14,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:16:14,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:16:14,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:16:14,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:16:14,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:16:14,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:16:14,404 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 14:16:14,456 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:16:14,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:16:14,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:16:14,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:16:14,459 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:16:14,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:16:14,459 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:16:14,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:16:14,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:16:14,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:16:14,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:16:14,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:16:14,461 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 14:16:14,461 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 14:16:14,462 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:16:14,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:16:14,462 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:16:14,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:16:14,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:16:14,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:16:14,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:16:14,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:16:14,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:16:14,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:16:14,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:16:14,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:16:14,465 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 14:16:14,465 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 14:16:14,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:16:14,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:16:14,466 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 14:16:14,466 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 069e404bf7b01a351383c4004538ba52022db96a [2020-10-24 14:16:14,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:16:14,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:16:14,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:16:14,904 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:16:14,905 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:16:14,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/floats-cbmc-regression/float2.c [2020-10-24 14:16:14,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8590fbff/8f240c85abee4c5789d0952e1f754118/FLAG0916cc0db [2020-10-24 14:16:15,600 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:16:15,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/floats-cbmc-regression/float2.c [2020-10-24 14:16:15,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8590fbff/8f240c85abee4c5789d0952e1f754118/FLAG0916cc0db [2020-10-24 14:16:15,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8590fbff/8f240c85abee4c5789d0952e1f754118 [2020-10-24 14:16:15,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:16:15,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:16:16,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:16:16,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:16:16,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:16:16,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:16:15" (1/1) ... [2020-10-24 14:16:16,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fa9d6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:16, skipping insertion in model container [2020-10-24 14:16:16,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:16:15" (1/1) ... [2020-10-24 14:16:16,027 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:16:16,049 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:16:16,263 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:16:16,292 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:16:16,311 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:16:16,330 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:16:16,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:16 WrapperNode [2020-10-24 14:16:16,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:16:16,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:16:16,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:16:16,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:16:16,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:16" (1/1) ... [2020-10-24 14:16:16,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:16" (1/1) ... [2020-10-24 14:16:16,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:16:16,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:16:16,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:16:16,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:16:16,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:16" (1/1) ... [2020-10-24 14:16:16,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:16" (1/1) ... [2020-10-24 14:16:16,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:16" (1/1) ... [2020-10-24 14:16:16,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:16" (1/1) ... [2020-10-24 14:16:16,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:16" (1/1) ... [2020-10-24 14:16:16,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:16" (1/1) ... [2020-10-24 14:16:16,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:16" (1/1) ... [2020-10-24 14:16:16,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:16:16,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:16:16,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:16:16,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:16:16,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:16:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_DOUBLE [2020-10-24 14:16:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_LONGDOUBLE [2020-10-24 14:16:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 14:16:16,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:16:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:16:16,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:16:16,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-10-24 14:16:16,880 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:16:16,880 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-24 14:16:16,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:16:16 BoogieIcfgContainer [2020-10-24 14:16:16,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:16:16,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:16:16,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:16:16,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:16:16,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:16:15" (1/3) ... [2020-10-24 14:16:16,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28376359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:16:16, skipping insertion in model container [2020-10-24 14:16:16,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:16:16" (2/3) ... [2020-10-24 14:16:16,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28376359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:16:16, skipping insertion in model container [2020-10-24 14:16:16,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:16:16" (3/3) ... [2020-10-24 14:16:16,909 INFO L111 eAbstractionObserver]: Analyzing ICFG float2.c [2020-10-24 14:16:16,933 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:16:16,939 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-10-24 14:16:16,950 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-24 14:16:16,978 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:16:16,978 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:16:16,979 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:16:16,979 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:16:16,979 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:16:16,979 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:16:16,980 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:16:16,980 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:16:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-24 14:16:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-24 14:16:17,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:16:17,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-24 14:16:17,003 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:16:17,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:16:17,010 INFO L82 PathProgramCache]: Analyzing trace with hash 925604, now seen corresponding path program 1 times [2020-10-24 14:16:17,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:16:17,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527544996] [2020-10-24 14:16:17,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-24 14:16:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:16:17,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-24 14:16:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:16:17,655 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-10-24 14:16:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:16:17,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:16:18,128 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-10-24 14:16:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:16:18,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527544996] [2020-10-24 14:16:18,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:16:18,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-10-24 14:16:18,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225946417] [2020-10-24 14:16:18,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 14:16:18,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:16:18,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 14:16:18,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 14:16:18,395 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-10-24 14:16:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:16:19,012 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-24 14:16:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 14:16:19,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-10-24 14:16:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:16:19,026 INFO L225 Difference]: With dead ends: 39 [2020-10-24 14:16:19,027 INFO L226 Difference]: Without dead ends: 15 [2020-10-24 14:16:19,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 14:16:19,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-24 14:16:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-24 14:16:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-24 14:16:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-10-24 14:16:19,060 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 4 [2020-10-24 14:16:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:16:19,061 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-10-24 14:16:19,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 14:16:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-10-24 14:16:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 14:16:19,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:16:19,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 14:16:19,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 14:16:19,263 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:16:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:16:19,266 INFO L82 PathProgramCache]: Analyzing trace with hash 889691430, now seen corresponding path program 1 times [2020-10-24 14:16:19,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:16:19,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67299963] [2020-10-24 14:16:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-24 14:16:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:16:19,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 14:16:19,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:16:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:16:19,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:16:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:16:19,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67299963] [2020-10-24 14:16:19,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:16:19,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-24 14:16:19,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356690387] [2020-10-24 14:16:19,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 14:16:19,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:16:19,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 14:16:19,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-24 14:16:19,443 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 4 states. [2020-10-24 14:16:19,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:16:19,463 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2020-10-24 14:16:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 14:16:19,464 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-24 14:16:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:16:19,464 INFO L225 Difference]: With dead ends: 15 [2020-10-24 14:16:19,464 INFO L226 Difference]: Without dead ends: 13 [2020-10-24 14:16:19,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-24 14:16:19,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-24 14:16:19,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-24 14:16:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-24 14:16:19,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 12 transitions. [2020-10-24 14:16:19,469 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 12 transitions. Word has length 6 [2020-10-24 14:16:19,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:16:19,469 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 12 transitions. [2020-10-24 14:16:19,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 14:16:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 12 transitions. [2020-10-24 14:16:19,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-24 14:16:19,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:16:19,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:16:19,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 14:16:19,679 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:16:19,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:16:19,681 INFO L82 PathProgramCache]: Analyzing trace with hash 295158664, now seen corresponding path program 1 times [2020-10-24 14:16:19,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:16:19,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794714913] [2020-10-24 14:16:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-24 14:16:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:16:19,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-24 14:16:19,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:16:20,079 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-10-24 14:16:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:16:20,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:16:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:16:20,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794714913] [2020-10-24 14:16:20,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:16:20,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-10-24 14:16:20,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209879653] [2020-10-24 14:16:20,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 14:16:20,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:16:20,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 14:16:20,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 14:16:20,200 INFO L87 Difference]: Start difference. First operand 13 states and 12 transitions. Second operand 5 states. [2020-10-24 14:16:20,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:16:20,509 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2020-10-24 14:16:20,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 14:16:20,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-24 14:16:20,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:16:20,511 INFO L225 Difference]: With dead ends: 13 [2020-10-24 14:16:20,511 INFO L226 Difference]: Without dead ends: 11 [2020-10-24 14:16:20,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 14:16:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-10-24 14:16:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-24 14:16:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-24 14:16:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2020-10-24 14:16:20,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 8 [2020-10-24 14:16:20,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:16:20,516 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2020-10-24 14:16:20,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 14:16:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2020-10-24 14:16:20,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 14:16:20,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:16:20,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:16:20,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-24 14:16:20,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:16:20,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:16:20,728 INFO L82 PathProgramCache]: Analyzing trace with hash 179821258, now seen corresponding path program 1 times [2020-10-24 14:16:20,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:16:20,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992040016] [2020-10-24 14:16:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-24 14:16:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:16:20,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-24 14:16:20,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:16:21,191 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-10-24 14:16:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:16:21,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:16:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:16:21,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992040016] [2020-10-24 14:16:21,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:16:21,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-10-24 14:16:21,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085695368] [2020-10-24 14:16:21,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 14:16:21,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:16:21,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 14:16:21,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 14:16:21,313 INFO L87 Difference]: Start difference. First operand 11 states and 10 transitions. Second operand 5 states. [2020-10-24 14:16:21,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:16:21,405 INFO L93 Difference]: Finished difference Result 11 states and 10 transitions. [2020-10-24 14:16:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 14:16:21,406 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-24 14:16:21,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:16:21,406 INFO L225 Difference]: With dead ends: 11 [2020-10-24 14:16:21,407 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 14:16:21,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 14:16:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 14:16:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 14:16:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 14:16:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 14:16:21,408 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-10-24 14:16:21,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:16:21,413 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 14:16:21,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 14:16:21,414 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 14:16:21,414 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 14:16:21,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-24 14:16:21,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 14:16:21,622 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-24 14:16:21,622 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-24 14:16:21,622 INFO L274 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-10-24 14:16:21,622 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-24 14:16:21,622 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-10-24 14:16:21,623 INFO L274 CegarLoopResult]: For program point L19-2(line 19) no Hoare annotation was computed. [2020-10-24 14:16:21,623 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-24 14:16:21,623 INFO L274 CegarLoopResult]: For program point L15-2(line 15) no Hoare annotation was computed. [2020-10-24 14:16:21,623 INFO L274 CegarLoopResult]: For program point L5(lines 5 24) no Hoare annotation was computed. [2020-10-24 14:16:21,623 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-24 14:16:21,624 INFO L274 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-10-24 14:16:21,624 INFO L274 CegarLoopResult]: For program point L3-2(line 3) no Hoare annotation was computed. [2020-10-24 14:16:21,624 INFO L274 CegarLoopResult]: For program point L3-3(line 3) no Hoare annotation was computed. [2020-10-24 14:16:21,624 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-24 14:16:21,624 INFO L274 CegarLoopResult]: For program point L3-4(line 3) no Hoare annotation was computed. [2020-10-24 14:16:21,624 INFO L274 CegarLoopResult]: For program point L3-5(line 3) no Hoare annotation was computed. [2020-10-24 14:16:21,624 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-24 14:16:21,624 INFO L274 CegarLoopResult]: For program point L3-6(line 3) no Hoare annotation was computed. [2020-10-24 14:16:21,624 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-24 14:16:21,625 INFO L274 CegarLoopResult]: For program point L3-7(line 3) no Hoare annotation was computed. [2020-10-24 14:16:21,625 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-24 14:16:21,625 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-24 14:16:21,625 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-10-24 14:16:21,625 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-24 14:16:21,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:16:21 BoogieIcfgContainer [2020-10-24 14:16:21,630 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:16:21,631 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:16:21,631 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:16:21,631 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:16:21,632 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:16:16" (3/4) ... [2020-10-24 14:16:21,635 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-24 14:16:21,645 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-24 14:16:21,646 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-24 14:16:21,646 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-24 14:16:21,646 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-24 14:16:21,692 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 14:16:21,693 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:16:21,696 INFO L168 Benchmark]: Toolchain (without parser) took 5700.75 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 31.1 MB in the beginning and 47.4 MB in the end (delta: -16.3 MB). Peak memory consumption was 1.7 MB. Max. memory is 16.1 GB. [2020-10-24 14:16:21,697 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 54.5 MB. Free memory was 37.9 MB in the beginning and 37.8 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:16:21,698 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.95 ms. Allocated memory is still 54.5 MB. Free memory was 30.6 MB in the beginning and 33.8 MB in the end (delta: -3.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-24 14:16:21,698 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.58 ms. Allocated memory is still 54.5 MB. Free memory was 33.8 MB in the beginning and 32.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:16:21,702 INFO L168 Benchmark]: Boogie Preprocessor took 31.67 ms. Allocated memory is still 54.5 MB. Free memory was 32.3 MB in the beginning and 31.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:16:21,703 INFO L168 Benchmark]: RCFGBuilder took 472.46 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 31.0 MB in the beginning and 45.6 MB in the end (delta: -14.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-10-24 14:16:21,703 INFO L168 Benchmark]: TraceAbstraction took 4737.67 ms. Allocated memory is still 69.2 MB. Free memory was 45.1 MB in the beginning and 50.0 MB in the end (delta: -4.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:16:21,706 INFO L168 Benchmark]: Witness Printer took 61.71 ms. Allocated memory is still 69.2 MB. Free memory was 50.0 MB in the beginning and 47.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-24 14:16:21,713 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 54.5 MB. Free memory was 37.9 MB in the beginning and 37.8 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 328.95 ms. Allocated memory is still 54.5 MB. Free memory was 30.6 MB in the beginning and 33.8 MB in the end (delta: -3.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.58 ms. Allocated memory is still 54.5 MB. Free memory was 33.8 MB in the beginning and 32.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.67 ms. Allocated memory is still 54.5 MB. Free memory was 32.3 MB in the beginning and 31.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 472.46 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 31.0 MB in the beginning and 45.6 MB in the end (delta: -14.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4737.67 ms. Allocated memory is still 69.2 MB. Free memory was 45.1 MB in the beginning and 50.0 MB in the end (delta: -4.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 61.71 ms. Allocated memory is still 69.2 MB. Free memory was 50.0 MB in the beginning and 47.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 22 SDslu, 26 SDs, 0 SdLazy, 55 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 0 LocationsWithAnnotation, 0 PreInvPairs, 0 NumberOfFragments, 0 HoareAnnotationTreeSize, 0 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 0 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 48 ConstructedInterpolants, 4 QuantifiedInterpolants, 1583 SizeOfPredicates, 9 NumberOfNonLiveVariables, 126 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...