./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-2.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_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/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 063966206f80cef10873a8e49ae0985aad7f65cb .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 21:07:15,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:07:15,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:07:16,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:07:16,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:07:16,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:07:16,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:07:16,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:07:16,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:07:16,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:07:16,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:07:16,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:07:16,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:07:16,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:07:16,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:07:16,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:07:16,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:07:16,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:07:16,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:07:16,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:07:16,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:07:16,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:07:16,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:07:16,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:07:16,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:07:16,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:07:16,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:07:16,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:07:16,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:07:16,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:07:16,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:07:16,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:07:16,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:07:16,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:07:16,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:07:16,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:07:16,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:07:16,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:07:16,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:07:16,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:07:16,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:07:16,108 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 21:07:16,153 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:07:16,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:07:16,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:07:16,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:07:16,156 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:07:16,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:07:16,157 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:07:16,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:07:16,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:07:16,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:07:16,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 21:07:16,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:07:16,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 21:07:16,160 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:07:16,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:07:16,161 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:07:16,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 21:07:16,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:07:16,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:07:16,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:07:16,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:07:16,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:07:16,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:07:16,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:07:16,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 21:07:16,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:07:16,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 21:07:16,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 21:07:16,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:07:16,164 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_10239ee1-a3fa-4b4c-8282-753ed4fc762a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 063966206f80cef10873a8e49ae0985aad7f65cb [2020-11-29 21:07:16,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:07:16,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:07:16,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:07:16,592 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:07:16,594 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:07:16,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2020-11-29 21:07:16,715 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/data/d433563d9/254757c416ec4e21ad85675ed073b3c0/FLAG4839ec40b [2020-11-29 21:07:17,395 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:07:17,396 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2020-11-29 21:07:17,411 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/data/d433563d9/254757c416ec4e21ad85675ed073b3c0/FLAG4839ec40b [2020-11-29 21:07:17,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/data/d433563d9/254757c416ec4e21ad85675ed073b3c0 [2020-11-29 21:07:17,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:07:17,750 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:07:17,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:07:17,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:07:17,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:07:17,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:07:17" (1/1) ... [2020-11-29 21:07:17,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69ca0f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:07:17, skipping insertion in model container [2020-11-29 21:07:17,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:07:17" (1/1) ... [2020-11-29 21:07:17,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:07:17,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:07:18,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:07:18,048 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:07:18,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:07:18,102 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:07:18,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:07:18 WrapperNode [2020-11-29 21:07:18,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:07:18,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:07:18,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:07:18,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:07:18,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:07:18" (1/1) ... [2020-11-29 21:07:18,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:07:18" (1/1) ... [2020-11-29 21:07:18,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:07:18,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:07:18,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:07:18,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:07:18,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:07:18" (1/1) ... [2020-11-29 21:07:18,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:07:18" (1/1) ... [2020-11-29 21:07:18,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:07:18" (1/1) ... [2020-11-29 21:07:18,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:07:18" (1/1) ... [2020-11-29 21:07:18,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:07:18" (1/1) ... [2020-11-29 21:07:18,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:07:18" (1/1) ... [2020-11-29 21:07:18,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:07:18" (1/1) ... [2020-11-29 21:07:18,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:07:18,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:07:18,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:07:18,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:07:18,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:07:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/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 [2020-11-29 21:07:18,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:07:18,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:07:18,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:07:18,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:07:18,267 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-11-29 21:07:18,268 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-11-29 21:07:18,550 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:07:18,558 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 21:07:18,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:07:18 BoogieIcfgContainer [2020-11-29 21:07:18,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:07:18,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:07:18,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:07:18,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:07:18,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:07:17" (1/3) ... [2020-11-29 21:07:18,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269f7c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:07:18, skipping insertion in model container [2020-11-29 21:07:18,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:07:18" (2/3) ... [2020-11-29 21:07:18,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269f7c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:07:18, skipping insertion in model container [2020-11-29 21:07:18,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:07:18" (3/3) ... [2020-11-29 21:07:18,595 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2020-11-29 21:07:18,608 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:07:18,622 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 21:07:18,635 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 21:07:18,665 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:07:18,665 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 21:07:18,665 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:07:18,665 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:07:18,666 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:07:18,666 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:07:18,666 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:07:18,666 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:07:18,702 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-11-29 21:07:18,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 21:07:18,708 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:07:18,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:07:18,709 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:07:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:07:18,733 INFO L82 PathProgramCache]: Analyzing trace with hash -730685886, now seen corresponding path program 1 times [2020-11-29 21:07:18,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:07:18,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419888454] [2020-11-29 21:07:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:07:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:19,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 21:07:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:07:19,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419888454] [2020-11-29 21:07:19,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:07:19,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 21:07:19,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484252631] [2020-11-29 21:07:19,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 21:07:19,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:07:19,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 21:07:19,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:07:19,188 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-11-29 21:07:19,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:07:19,274 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-11-29 21:07:19,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 21:07:19,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 21:07:19,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:07:19,287 INFO L225 Difference]: With dead ends: 35 [2020-11-29 21:07:19,287 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 21:07:19,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:07:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 21:07:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-29 21:07:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 21:07:19,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-11-29 21:07:19,363 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2020-11-29 21:07:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:07:19,363 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-11-29 21:07:19,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 21:07:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-11-29 21:07:19,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 21:07:19,366 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:07:19,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:07:19,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 21:07:19,367 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:07:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:07:19,368 INFO L82 PathProgramCache]: Analyzing trace with hash -461623668, now seen corresponding path program 1 times [2020-11-29 21:07:19,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:07:19,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603240184] [2020-11-29 21:07:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:07:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:19,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 21:07:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:07:19,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603240184] [2020-11-29 21:07:19,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:07:19,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 21:07:19,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859903408] [2020-11-29 21:07:19,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 21:07:19,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:07:19,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 21:07:19,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:07:19,494 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-11-29 21:07:19,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:07:19,521 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-11-29 21:07:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 21:07:19,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-29 21:07:19,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:07:19,523 INFO L225 Difference]: With dead ends: 24 [2020-11-29 21:07:19,524 INFO L226 Difference]: Without dead ends: 20 [2020-11-29 21:07:19,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:07:19,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-29 21:07:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-11-29 21:07:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 21:07:19,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-11-29 21:07:19,532 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2020-11-29 21:07:19,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:07:19,532 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-11-29 21:07:19,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 21:07:19,532 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-11-29 21:07:19,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 21:07:19,533 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:07:19,534 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:07:19,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 21:07:19,536 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:07:19,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:07:19,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1253239047, now seen corresponding path program 1 times [2020-11-29 21:07:19,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:07:19,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045734962] [2020-11-29 21:07:19,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:07:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:19,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 21:07:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:19,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:19,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 21:07:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 21:07:19,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045734962] [2020-11-29 21:07:19,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64482582] [2020-11-29 21:07:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:07:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:19,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 21:07:19,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:07:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 21:07:19,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:07:19,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-11-29 21:07:19,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991350010] [2020-11-29 21:07:19,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 21:07:19,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:07:19,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 21:07:19,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-29 21:07:19,898 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 9 states. [2020-11-29 21:07:20,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:07:20,131 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2020-11-29 21:07:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 21:07:20,132 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-11-29 21:07:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:07:20,133 INFO L225 Difference]: With dead ends: 35 [2020-11-29 21:07:20,133 INFO L226 Difference]: Without dead ends: 20 [2020-11-29 21:07:20,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-11-29 21:07:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-29 21:07:20,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-29 21:07:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 21:07:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-11-29 21:07:20,148 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2020-11-29 21:07:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:07:20,149 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-11-29 21:07:20,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 21:07:20,150 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-11-29 21:07:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 21:07:20,154 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:07:20,155 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:07:20,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 21:07:20,378 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:07:20,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:07:20,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1685451365, now seen corresponding path program 1 times [2020-11-29 21:07:20,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:07:20,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605113589] [2020-11-29 21:07:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:07:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:20,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 21:07:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:20,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:20,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 21:07:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 21:07:20,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605113589] [2020-11-29 21:07:20,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843004759] [2020-11-29 21:07:20,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:07:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:20,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 21:07:20,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:07:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 21:07:20,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:07:20,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 21:07:20,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866039664] [2020-11-29 21:07:20,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 21:07:20,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:07:20,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 21:07:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 21:07:20,654 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 7 states. [2020-11-29 21:07:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:07:20,818 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-11-29 21:07:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 21:07:20,820 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-11-29 21:07:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:07:20,822 INFO L225 Difference]: With dead ends: 38 [2020-11-29 21:07:20,822 INFO L226 Difference]: Without dead ends: 34 [2020-11-29 21:07:20,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-11-29 21:07:20,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-29 21:07:20,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-29 21:07:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-29 21:07:20,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2020-11-29 21:07:20,844 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 24 [2020-11-29 21:07:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:07:20,845 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2020-11-29 21:07:20,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 21:07:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2020-11-29 21:07:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 21:07:20,847 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:07:20,847 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:07:21,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:07:21,048 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:07:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:07:21,049 INFO L82 PathProgramCache]: Analyzing trace with hash 228714308, now seen corresponding path program 2 times [2020-11-29 21:07:21,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:07:21,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172499471] [2020-11-29 21:07:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:07:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:21,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 21:07:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:21,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:21,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:21,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 21:07:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:21,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 21:07:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-29 21:07:21,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172499471] [2020-11-29 21:07:21,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628782542] [2020-11-29 21:07:21,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:07:21,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:07:21,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:07:21,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 21:07:21,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:07:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-29 21:07:21,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:07:21,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-11-29 21:07:21,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153409386] [2020-11-29 21:07:21,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 21:07:21,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:07:21,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 21:07:21,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-11-29 21:07:21,441 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 12 states. [2020-11-29 21:07:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:07:21,736 INFO L93 Difference]: Finished difference Result 69 states and 106 transitions. [2020-11-29 21:07:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 21:07:21,737 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-11-29 21:07:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:07:21,738 INFO L225 Difference]: With dead ends: 69 [2020-11-29 21:07:21,739 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 21:07:21,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-11-29 21:07:21,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 21:07:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-29 21:07:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-29 21:07:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-11-29 21:07:21,747 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2020-11-29 21:07:21,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:07:21,748 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-11-29 21:07:21,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 21:07:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-11-29 21:07:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-29 21:07:21,759 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:07:21,760 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:07:21,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:07:21,978 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:07:21,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:07:21,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1825869943, now seen corresponding path program 3 times [2020-11-29 21:07:21,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:07:21,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741344571] [2020-11-29 21:07:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:07:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:22,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 21:07:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:22,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:22,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:22,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:22,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 21:07:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:22,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 21:07:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:22,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-29 21:07:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:22,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:22,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:22,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 21:07:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:22,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 21:07:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-11-29 21:07:22,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741344571] [2020-11-29 21:07:22,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856406119] [2020-11-29 21:07:22,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:07:22,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-29 21:07:22,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:07:22,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 21:07:22,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:07:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-11-29 21:07:22,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:07:22,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-11-29 21:07:22,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657997271] [2020-11-29 21:07:22,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 21:07:22,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:07:22,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 21:07:22,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-29 21:07:22,449 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 9 states. [2020-11-29 21:07:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:07:22,667 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2020-11-29 21:07:22,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 21:07:22,668 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-11-29 21:07:22,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:07:22,671 INFO L225 Difference]: With dead ends: 80 [2020-11-29 21:07:22,672 INFO L226 Difference]: Without dead ends: 76 [2020-11-29 21:07:22,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-29 21:07:22,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-29 21:07:22,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-11-29 21:07:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-29 21:07:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2020-11-29 21:07:22,699 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 79 [2020-11-29 21:07:22,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:07:22,701 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2020-11-29 21:07:22,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 21:07:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2020-11-29 21:07:22,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-11-29 21:07:22,714 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:07:22,714 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:07:22,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:07:22,931 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:07:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:07:22,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1742961929, now seen corresponding path program 4 times [2020-11-29 21:07:22,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:07:22,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953463530] [2020-11-29 21:07:22,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:07:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 21:07:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 21:07:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 21:07:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-29 21:07:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 21:07:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-29 21:07:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 21:07:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 21:07:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-29 21:07:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:07:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 21:07:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:07:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 193 proven. 313 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-11-29 21:07:23,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953463530] [2020-11-29 21:07:23,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991980367] [2020-11-29 21:07:23,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:07:23,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 21:07:23,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:07:23,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 21:07:23,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:07:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 274 proven. 108 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-11-29 21:07:23,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:07:23,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 16 [2020-11-29 21:07:23,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543935699] [2020-11-29 21:07:23,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 21:07:23,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:07:23,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 21:07:23,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-11-29 21:07:23,730 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand 16 states. [2020-11-29 21:07:24,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:07:24,555 INFO L93 Difference]: Finished difference Result 143 states and 252 transitions. [2020-11-29 21:07:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-29 21:07:24,555 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 133 [2020-11-29 21:07:24,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:07:24,557 INFO L225 Difference]: With dead ends: 143 [2020-11-29 21:07:24,557 INFO L226 Difference]: Without dead ends: 66 [2020-11-29 21:07:24,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2020-11-29 21:07:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-29 21:07:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2020-11-29 21:07:24,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-29 21:07:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-11-29 21:07:24,573 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 133 [2020-11-29 21:07:24,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:07:24,573 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-11-29 21:07:24,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 21:07:24,573 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-11-29 21:07:24,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-29 21:07:24,575 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:07:24,575 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:07:24,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 21:07:24,798 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:07:24,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:07:24,799 INFO L82 PathProgramCache]: Analyzing trace with hash -575030355, now seen corresponding path program 5 times [2020-11-29 21:07:24,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:07:24,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477604192] [2020-11-29 21:07:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:07:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:07:24,818 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:07:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:07:24,835 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:07:24,865 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:07:24,865 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 21:07:24,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 21:07:24,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:07:24 BoogieIcfgContainer [2020-11-29 21:07:24,952 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:07:24,953 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:07:24,954 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:07:24,955 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:07:24,955 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:07:18" (3/4) ... [2020-11-29 21:07:24,958 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 21:07:25,036 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_10239ee1-a3fa-4b4c-8282-753ed4fc762a/bin/uautomizer/witness.graphml [2020-11-29 21:07:25,036 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:07:25,038 INFO L168 Benchmark]: Toolchain (without parser) took 7287.62 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 61.1 MB in the beginning and 80.4 MB in the end (delta: -19.3 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. [2020-11-29 21:07:25,039 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 75.5 MB. Free memory was 46.0 MB in the beginning and 46.0 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:07:25,039 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.74 ms. Allocated memory is still 92.3 MB. Free memory was 60.9 MB in the beginning and 70.8 MB in the end (delta: -9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:07:25,040 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.11 ms. Allocated memory is still 92.3 MB. Free memory was 70.8 MB in the beginning and 69.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:07:25,041 INFO L168 Benchmark]: Boogie Preprocessor took 23.08 ms. Allocated memory is still 92.3 MB. Free memory was 69.4 MB in the beginning and 68.7 MB in the end (delta: 715.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:07:25,041 INFO L168 Benchmark]: RCFGBuilder took 390.01 ms. Allocated memory is still 92.3 MB. Free memory was 68.7 MB in the beginning and 57.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:07:25,042 INFO L168 Benchmark]: TraceAbstraction took 6378.11 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 56.8 MB in the beginning and 86.7 MB in the end (delta: -29.9 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2020-11-29 21:07:25,042 INFO L168 Benchmark]: Witness Printer took 83.49 ms. Allocated memory is still 134.2 MB. Free memory was 86.7 MB in the beginning and 80.4 MB in the end (delta: 6.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 21:07:25,045 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 75.5 MB. Free memory was 46.0 MB in the beginning and 46.0 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 352.74 ms. Allocated memory is still 92.3 MB. Free memory was 60.9 MB in the beginning and 70.8 MB in the end (delta: -9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.11 ms. Allocated memory is still 92.3 MB. Free memory was 70.8 MB in the beginning and 69.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.08 ms. Allocated memory is still 92.3 MB. Free memory was 69.4 MB in the beginning and 68.7 MB in the end (delta: 715.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 390.01 ms. Allocated memory is still 92.3 MB. Free memory was 68.7 MB in the beginning and 57.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6378.11 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 56.8 MB in the beginning and 86.7 MB in the end (delta: -29.9 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * Witness Printer took 83.49 ms. Allocated memory is still 134.2 MB. Free memory was 86.7 MB in the beginning and 80.4 MB in the end (delta: 6.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L26] int x = 5; [L27] CALL, EXPR fibo(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L13] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L13] return fibo(n-1) + fibo(n-2); [L27] RET, EXPR fibo(x) [L27] int result = fibo(x); [L28] COND TRUE result == 5 [L4] __assert_fail("0", "fibo_5-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.2s, OverallIterations: 8, TraceHistogramMax: 19, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 133 SDtfs, 210 SDslu, 375 SDs, 0 SdLazy, 645 SolverSat, 171 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 465 GetRequests, 382 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred 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: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 719 NumberOfCodeBlocks, 689 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 601 ConstructedInterpolants, 0 QuantifiedInterpolants, 89271 SizeOfPredicates, 20 NumberOfNonLiveVariables, 696 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 1923/2602 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...