./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/gcd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/gcd01-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer --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 d6f4e1dd3818e9d3e8c54653af66359ead501b84 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:18:27,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:18:27,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:18:27,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:18:27,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:18:27,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:18:27,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:18:27,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:18:27,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:18:27,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:18:27,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:18:27,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:18:27,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:18:27,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:18:27,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:18:27,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:18:27,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:18:27,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:18:27,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:18:27,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:18:27,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:18:27,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:18:27,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:18:27,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:18:27,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:18:27,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:18:27,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:18:27,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:18:27,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:18:27,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:18:27,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:18:27,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:18:27,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:18:27,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:18:27,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:18:27,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:18:27,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:18:27,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:18:27,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:18:27,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:18:27,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:18:27,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:18:28,016 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:18:28,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:18:28,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:18:28,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:18:28,019 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:18:28,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:18:28,020 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:18:28,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:18:28,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:18:28,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:18:28,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:18:28,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:18:28,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:18:28,022 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:18:28,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:18:28,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:18:28,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:18:28,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:18:28,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:18:28,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:18:28,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:18:28,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:18:28,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:18:28,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:18:28,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:18:28,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:18:28,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:18:28,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:18:28,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:18:28,026 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:/tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6f4e1dd3818e9d3e8c54653af66359ead501b84 [2020-11-30 00:18:28,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:18:28,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:18:28,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:18:28,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:18:28,357 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:18:28,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer/../../sv-benchmarks/c/recursive/gcd01-1.c [2020-11-30 00:18:28,452 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer/data/1733920fc/ac5e8663b8ab481f814a9ace8af09a1b/FLAG327fd2ab1 [2020-11-30 00:18:28,988 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:18:28,988 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/sv-benchmarks/c/recursive/gcd01-1.c [2020-11-30 00:18:28,995 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer/data/1733920fc/ac5e8663b8ab481f814a9ace8af09a1b/FLAG327fd2ab1 [2020-11-30 00:18:29,377 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer/data/1733920fc/ac5e8663b8ab481f814a9ace8af09a1b [2020-11-30 00:18:29,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:18:29,384 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:18:29,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:18:29,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:18:29,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:18:29,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:18:29" (1/1) ... [2020-11-30 00:18:29,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11d7b132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:18:29, skipping insertion in model container [2020-11-30 00:18:29,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:18:29" (1/1) ... [2020-11-30 00:18:29,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:18:29,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:18:29,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:18:29,638 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:18:29,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:18:29,666 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:18:29,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:18:29 WrapperNode [2020-11-30 00:18:29,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:18:29,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:18:29,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:18:29,669 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:18:29,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:18:29" (1/1) ... [2020-11-30 00:18:29,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:18:29" (1/1) ... [2020-11-30 00:18:29,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:18:29,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:18:29,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:18:29,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:18:29,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:18:29" (1/1) ... [2020-11-30 00:18:29,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:18:29" (1/1) ... [2020-11-30 00:18:29,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:18:29" (1/1) ... [2020-11-30 00:18:29,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:18:29" (1/1) ... [2020-11-30 00:18:29,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:18:29" (1/1) ... [2020-11-30 00:18:29,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:18:29" (1/1) ... [2020-11-30 00:18:29,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:18:29" (1/1) ... [2020-11-30 00:18:29,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:18:29,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:18:29,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:18:29,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:18:29,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:18:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer/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 [2020-11-30 00:18:29,813 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-11-30 00:18:29,814 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-11-30 00:18:29,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:18:29,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:18:29,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:18:29,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:18:30,130 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:18:30,131 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 00:18:30,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:18:30 BoogieIcfgContainer [2020-11-30 00:18:30,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:18:30,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:18:30,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:18:30,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:18:30,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:18:29" (1/3) ... [2020-11-30 00:18:30,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f80fb33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:18:30, skipping insertion in model container [2020-11-30 00:18:30,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:18:29" (2/3) ... [2020-11-30 00:18:30,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f80fb33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:18:30, skipping insertion in model container [2020-11-30 00:18:30,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:18:30" (3/3) ... [2020-11-30 00:18:30,168 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-11-30 00:18:30,197 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:18:30,202 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:18:30,222 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:18:30,261 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:18:30,263 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:18:30,269 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:18:30,269 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:18:30,269 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:18:30,270 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:18:30,270 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:18:30,270 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:18:30,296 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-11-30 00:18:30,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 00:18:30,302 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:18:30,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:18:30,304 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:18:30,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:18:30,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1506790189, now seen corresponding path program 1 times [2020-11-30 00:18:30,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:18:30,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235524969] [2020-11-30 00:18:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:18:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:30,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:18:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:18:30,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235524969] [2020-11-30 00:18:30,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:18:30,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-30 00:18:30,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033386522] [2020-11-30 00:18:30,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 00:18:30,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:18:30,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:18:30,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:18:30,739 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-11-30 00:18:30,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:18:30,902 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-11-30 00:18:30,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:18:30,904 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-30 00:18:30,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:18:30,915 INFO L225 Difference]: With dead ends: 38 [2020-11-30 00:18:30,915 INFO L226 Difference]: Without dead ends: 21 [2020-11-30 00:18:30,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:18:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-30 00:18:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-30 00:18:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 00:18:30,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-11-30 00:18:30,977 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2020-11-30 00:18:30,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:18:30,977 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-11-30 00:18:30,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 00:18:30,977 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-11-30 00:18:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 00:18:30,979 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:18:30,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:18:30,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:18:30,980 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:18:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:18:30,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1104519975, now seen corresponding path program 1 times [2020-11-30 00:18:30,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:18:30,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719610423] [2020-11-30 00:18:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:18:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:31,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:18:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:18:31,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719610423] [2020-11-30 00:18:31,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:18:31,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-30 00:18:31,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125177450] [2020-11-30 00:18:31,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 00:18:31,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:18:31,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:18:31,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:18:31,110 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 6 states. [2020-11-30 00:18:31,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:18:31,174 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-11-30 00:18:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:18:31,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-30 00:18:31,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:18:31,177 INFO L225 Difference]: With dead ends: 27 [2020-11-30 00:18:31,177 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 00:18:31,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:18:31,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 00:18:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-11-30 00:18:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 00:18:31,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-11-30 00:18:31,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2020-11-30 00:18:31,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:18:31,185 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-11-30 00:18:31,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 00:18:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-11-30 00:18:31,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 00:18:31,186 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:18:31,187 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:18:31,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:18:31,187 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:18:31,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:18:31,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1653337583, now seen corresponding path program 1 times [2020-11-30 00:18:31,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:18:31,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082049325] [2020-11-30 00:18:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:18:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:31,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:18:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:31,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:18:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:18:31,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082049325] [2020-11-30 00:18:31,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:18:31,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-30 00:18:31,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885118871] [2020-11-30 00:18:31,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 00:18:31,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:18:31,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:18:31,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:18:31,394 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 6 states. [2020-11-30 00:18:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:18:31,532 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2020-11-30 00:18:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:18:31,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-11-30 00:18:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:18:31,536 INFO L225 Difference]: With dead ends: 33 [2020-11-30 00:18:31,536 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 00:18:31,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:18:31,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 00:18:31,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-11-30 00:18:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 00:18:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-11-30 00:18:31,555 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2020-11-30 00:18:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:18:31,556 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-11-30 00:18:31,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 00:18:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-11-30 00:18:31,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 00:18:31,559 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:18:31,559 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:18:31,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 00:18:31,560 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:18:31,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:18:31,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1295869967, now seen corresponding path program 1 times [2020-11-30 00:18:31,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:18:31,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630681615] [2020-11-30 00:18:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:18:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:31,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:18:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:31,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:18:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:18:31,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630681615] [2020-11-30 00:18:31,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:18:31,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-30 00:18:31,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757431562] [2020-11-30 00:18:31,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 00:18:31,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:18:31,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 00:18:31,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:18:31,790 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 7 states. [2020-11-30 00:18:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:18:31,974 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-11-30 00:18:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:18:31,976 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-11-30 00:18:31,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:18:31,978 INFO L225 Difference]: With dead ends: 33 [2020-11-30 00:18:31,978 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 00:18:31,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-30 00:18:31,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 00:18:31,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-11-30 00:18:31,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 00:18:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-11-30 00:18:31,993 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 20 [2020-11-30 00:18:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:18:31,994 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-11-30 00:18:31,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 00:18:31,994 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-11-30 00:18:31,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-30 00:18:31,996 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:18:31,996 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:18:31,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 00:18:31,997 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:18:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:18:31,998 INFO L82 PathProgramCache]: Analyzing trace with hash 204602807, now seen corresponding path program 1 times [2020-11-30 00:18:32,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:18:32,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469956442] [2020-11-30 00:18:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:18:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:32,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:18:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:32,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:18:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 00:18:32,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469956442] [2020-11-30 00:18:32,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:18:32,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-30 00:18:32,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703129542] [2020-11-30 00:18:32,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 00:18:32,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:18:32,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 00:18:32,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:18:32,154 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-11-30 00:18:32,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:18:32,243 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-11-30 00:18:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:18:32,244 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-30 00:18:32,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:18:32,245 INFO L225 Difference]: With dead ends: 28 [2020-11-30 00:18:32,245 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 00:18:32,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:18:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 00:18:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-11-30 00:18:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 00:18:32,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-30 00:18:32,254 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 21 [2020-11-30 00:18:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:18:32,255 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-30 00:18:32,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 00:18:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-30 00:18:32,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-30 00:18:32,256 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:18:32,256 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:18:32,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 00:18:32,257 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:18:32,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:18:32,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1443454039, now seen corresponding path program 1 times [2020-11-30 00:18:32,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:18:32,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311680093] [2020-11-30 00:18:32,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:18:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:32,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:18:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:32,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:18:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-30 00:18:32,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311680093] [2020-11-30 00:18:32,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:18:32,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-30 00:18:32,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013437338] [2020-11-30 00:18:32,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 00:18:32,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:18:32,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 00:18:32,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:18:32,383 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2020-11-30 00:18:32,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:18:32,460 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-11-30 00:18:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:18:32,461 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-30 00:18:32,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:18:32,462 INFO L225 Difference]: With dead ends: 31 [2020-11-30 00:18:32,462 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 00:18:32,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:18:32,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 00:18:32,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 00:18:32,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 00:18:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-11-30 00:18:32,470 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 21 [2020-11-30 00:18:32,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:18:32,471 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-11-30 00:18:32,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 00:18:32,471 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-11-30 00:18:32,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-30 00:18:32,473 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:18:32,473 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:18:32,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-30 00:18:32,473 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:18:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:18:32,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1698059833, now seen corresponding path program 1 times [2020-11-30 00:18:32,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:18:32,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300648220] [2020-11-30 00:18:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:18:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:32,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:18:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:32,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:18:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:32,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-30 00:18:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:18:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-30 00:18:32,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300648220] [2020-11-30 00:18:32,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:18:32,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-30 00:18:32,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733474811] [2020-11-30 00:18:32,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:18:32,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:18:32,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:18:32,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:18:32,689 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 8 states. [2020-11-30 00:18:32,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:18:32,798 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-11-30 00:18:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 00:18:32,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-11-30 00:18:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:18:32,799 INFO L225 Difference]: With dead ends: 27 [2020-11-30 00:18:32,799 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 00:18:32,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-30 00:18:32,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 00:18:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 00:18:32,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 00:18:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 00:18:32,801 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-11-30 00:18:32,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:18:32,801 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:18:32,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:18:32,802 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 00:18:32,802 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 00:18:32,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-30 00:18:32,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 00:18:32,904 INFO L274 CegarLoopResult]: For program point gcdFINAL(lines 17 28) no Hoare annotation was computed. [2020-11-30 00:18:32,904 INFO L270 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-11-30 00:18:32,905 INFO L274 CegarLoopResult]: For program point gcdEXIT(lines 17 28) no Hoare annotation was computed. [2020-11-30 00:18:32,905 INFO L274 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-11-30 00:18:32,905 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-11-30 00:18:32,905 INFO L274 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-11-30 00:18:32,905 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-30 00:18:32,905 INFO L277 CegarLoopResult]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2020-11-30 00:18:32,906 INFO L274 CegarLoopResult]: For program point L21(lines 21 23) no Hoare annotation was computed. [2020-11-30 00:18:32,906 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-30 00:18:32,906 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 00:18:32,906 INFO L274 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-11-30 00:18:32,906 INFO L274 CegarLoopResult]: For program point L36(lines 36 38) no Hoare annotation was computed. [2020-11-30 00:18:32,906 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-30 00:18:32,906 INFO L274 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-11-30 00:18:32,906 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 00:18:32,907 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 00:18:32,907 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 00:18:32,907 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-30 00:18:32,907 INFO L277 CegarLoopResult]: At program point L43(lines 30 45) the Hoare annotation is: true [2020-11-30 00:18:32,907 INFO L274 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-11-30 00:18:32,907 INFO L270 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start_main_~m~0)) [2020-11-30 00:18:32,907 INFO L274 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-11-30 00:18:32,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:18:32 BoogieIcfgContainer [2020-11-30 00:18:32,920 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:18:32,921 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:18:32,921 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:18:32,922 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:18:32,922 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:18:30" (3/4) ... [2020-11-30 00:18:32,926 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 00:18:32,933 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd [2020-11-30 00:18:32,940 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-30 00:18:32,940 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-30 00:18:32,940 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:18:32,941 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:18:33,013 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c55cd6aa-96a0-43fb-aebe-3508e6e267c2/bin/uautomizer/witness.graphml [2020-11-30 00:18:33,014 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:18:33,016 INFO L168 Benchmark]: Toolchain (without parser) took 3630.78 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 70.4 MB in the beginning and 70.5 MB in the end (delta: -65.9 kB). Peak memory consumption was 20.6 MB. Max. memory is 16.1 GB. [2020-11-30 00:18:33,016 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 104.9 MB. Free memory was 78.3 MB in the beginning and 78.2 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:18:33,017 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.83 ms. Allocated memory is still 104.9 MB. Free memory was 70.3 MB in the beginning and 81.8 MB in the end (delta: -11.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:18:33,017 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.74 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 80.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:18:33,018 INFO L168 Benchmark]: Boogie Preprocessor took 22.17 ms. Allocated memory is still 104.9 MB. Free memory was 80.2 MB in the beginning and 79.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:18:33,019 INFO L168 Benchmark]: RCFGBuilder took 408.01 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 66.6 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 00:18:33,019 INFO L168 Benchmark]: TraceAbstraction took 2771.46 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 66.1 MB in the beginning and 73.6 MB in the end (delta: -7.5 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. [2020-11-30 00:18:33,020 INFO L168 Benchmark]: Witness Printer took 92.42 ms. Allocated memory is still 125.8 MB. Free memory was 73.6 MB in the beginning and 70.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:18:33,029 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 104.9 MB. Free memory was 78.3 MB in the beginning and 78.2 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 281.83 ms. Allocated memory is still 104.9 MB. Free memory was 70.3 MB in the beginning and 81.8 MB in the end (delta: -11.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.74 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 80.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.17 ms. Allocated memory is still 104.9 MB. Free memory was 80.2 MB in the beginning and 79.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 408.01 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 66.6 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2771.46 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 66.1 MB in the beginning and 73.6 MB in the end (delta: -7.5 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. * Witness Printer took 92.42 ms. Allocated memory is still 125.8 MB. Free memory was 73.6 MB in the beginning and 70.5 MB in the end (delta: 3.1 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 93 SDslu, 376 SDs, 0 SdLazy, 281 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=6, 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, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 11 PreInvPairs, 14 NumberOfFragments, 37 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 136 NumberOfCodeBlocks, 136 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 5550 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 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...