./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.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_580b6284-0ee4-491a-9a5f-a691d7745fb7/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/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 f684876205455ff045e7b27eb3c5cbf35fa59fa1 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 23:32:04,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:32:04,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:32:04,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:32:04,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:32:04,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:32:04,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:32:04,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:32:04,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:32:04,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:32:04,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:32:04,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:32:04,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:32:04,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:32:04,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:32:04,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:32:04,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:32:04,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:32:04,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:32:04,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:32:04,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:32:04,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:32:04,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:32:04,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:32:04,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:32:04,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:32:04,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:32:04,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:32:04,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:32:04,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:32:04,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:32:04,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:32:04,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:32:04,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:32:04,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:32:04,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:32:04,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:32:04,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:32:04,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:32:04,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:32:04,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:32:04,406 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 23:32:04,450 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:32:04,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:32:04,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:32:04,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:32:04,462 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:32:04,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:32:04,463 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:32:04,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:32:04,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:32:04,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:32:04,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:32:04,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:32:04,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:32:04,466 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:32:04,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:32:04,467 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:32:04,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:32:04,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:32:04,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:32:04,468 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:32:04,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:32:04,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:32:04,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:32:04,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:32:04,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:32:04,469 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:32:04,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:32:04,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:32:04,470 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:32:04,471 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_580b6284-0ee4-491a-9a5f-a691d7745fb7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f684876205455ff045e7b27eb3c5cbf35fa59fa1 [2020-11-29 23:32:04,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:32:04,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:32:04,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:32:04,864 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:32:04,865 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:32:04,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2020-11-29 23:32:04,970 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/bin/uautomizer/data/b643e841c/c9bf99498f4243118197a17f4460cb7f/FLAGf854c1a98 [2020-11-29 23:32:05,564 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:32:05,564 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2020-11-29 23:32:05,570 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/bin/uautomizer/data/b643e841c/c9bf99498f4243118197a17f4460cb7f/FLAGf854c1a98 [2020-11-29 23:32:05,927 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/bin/uautomizer/data/b643e841c/c9bf99498f4243118197a17f4460cb7f [2020-11-29 23:32:05,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:32:05,932 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:32:05,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:32:05,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:32:05,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:32:05,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:32:05" (1/1) ... [2020-11-29 23:32:05,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ce3ba3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:32:05, skipping insertion in model container [2020-11-29 23:32:05,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:32:05" (1/1) ... [2020-11-29 23:32:05,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:32:05,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:32:06,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:32:06,244 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:32:06,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:32:06,302 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:32:06,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:32:06 WrapperNode [2020-11-29 23:32:06,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:32:06,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:32:06,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:32:06,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:32:06,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:32:06" (1/1) ... [2020-11-29 23:32:06,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:32:06" (1/1) ... [2020-11-29 23:32:06,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:32:06,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:32:06,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:32:06,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:32:06,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:32:06" (1/1) ... [2020-11-29 23:32:06,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:32:06" (1/1) ... [2020-11-29 23:32:06,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:32:06" (1/1) ... [2020-11-29 23:32:06,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:32:06" (1/1) ... [2020-11-29 23:32:06,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:32:06" (1/1) ... [2020-11-29 23:32:06,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:32:06" (1/1) ... [2020-11-29 23:32:06,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:32:06" (1/1) ... [2020-11-29 23:32:06,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:32:06,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:32:06,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:32:06,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:32:06,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:32:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/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 23:32:06,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:32:06,458 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-29 23:32:06,458 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-29 23:32:06,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:32:06,460 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-29 23:32:06,462 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-29 23:32:06,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:32:06,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:32:06,769 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:32:06,769 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 23:32:06,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:32:06 BoogieIcfgContainer [2020-11-29 23:32:06,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:32:06,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:32:06,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:32:06,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:32:06,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:32:05" (1/3) ... [2020-11-29 23:32:06,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e2cd2fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:32:06, skipping insertion in model container [2020-11-29 23:32:06,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:32:06" (2/3) ... [2020-11-29 23:32:06,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e2cd2fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:32:06, skipping insertion in model container [2020-11-29 23:32:06,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:32:06" (3/3) ... [2020-11-29 23:32:06,787 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2020-11-29 23:32:06,800 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:32:06,804 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 23:32:06,820 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 23:32:06,866 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:32:06,866 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:32:06,867 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:32:06,867 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:32:06,867 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:32:06,867 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:32:06,867 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:32:06,867 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:32:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-11-29 23:32:06,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 23:32:06,893 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:32:06,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:32:06,894 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:32:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:32:06,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2146840844, now seen corresponding path program 1 times [2020-11-29 23:32:06,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:32:06,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22673238] [2020-11-29 23:32:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:32:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:07,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 23:32:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:07,179 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 23:32:07,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22673238] [2020-11-29 23:32:07,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:32:07,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:32:07,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497909136] [2020-11-29 23:32:07,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:32:07,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:32:07,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:32:07,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:32:07,218 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-11-29 23:32:07,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:32:07,318 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-11-29 23:32:07,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:32:07,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 23:32:07,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:32:07,331 INFO L225 Difference]: With dead ends: 44 [2020-11-29 23:32:07,332 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 23:32:07,336 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 23:32:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 23:32:07,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 23:32:07,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 23:32:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-29 23:32:07,380 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-11-29 23:32:07,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:32:07,381 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-29 23:32:07,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:32:07,381 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-29 23:32:07,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 23:32:07,382 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:32:07,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:32:07,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:32:07,383 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:32:07,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:32:07,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1412337332, now seen corresponding path program 1 times [2020-11-29 23:32:07,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:32:07,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456632119] [2020-11-29 23:32:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:32:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:07,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 23:32:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:07,548 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 23:32:07,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456632119] [2020-11-29 23:32:07,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:32:07,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 23:32:07,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143390836] [2020-11-29 23:32:07,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:32:07,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:32:07,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:32:07,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:32:07,552 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-11-29 23:32:07,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:32:07,597 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-11-29 23:32:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:32:07,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-29 23:32:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:32:07,600 INFO L225 Difference]: With dead ends: 33 [2020-11-29 23:32:07,600 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 23:32:07,601 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 23:32:07,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 23:32:07,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-29 23:32:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 23:32:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-29 23:32:07,611 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-11-29 23:32:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:32:07,611 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-29 23:32:07,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:32:07,612 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-29 23:32:07,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 23:32:07,613 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:32:07,614 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:32:07,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 23:32:07,614 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:32:07,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:32:07,615 INFO L82 PathProgramCache]: Analyzing trace with hash -888595213, now seen corresponding path program 1 times [2020-11-29 23:32:07,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:32:07,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063074432] [2020-11-29 23:32:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:32:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:07,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 23:32:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:07,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 23:32:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:07,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 23:32:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 23:32:07,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063074432] [2020-11-29 23:32:07,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308191980] [2020-11-29 23:32:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/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 23:32:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:07,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 23:32:07,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:32:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 23:32:08,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:32:08,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-11-29 23:32:08,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003397724] [2020-11-29 23:32:08,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 23:32:08,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:32:08,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 23:32:08,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-29 23:32:08,118 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 10 states. [2020-11-29 23:32:08,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:32:08,471 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-11-29 23:32:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:32:08,473 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-11-29 23:32:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:32:08,475 INFO L225 Difference]: With dead ends: 55 [2020-11-29 23:32:08,475 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 23:32:08,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-29 23:32:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 23:32:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-11-29 23:32:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 23:32:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-11-29 23:32:08,495 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-11-29 23:32:08,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:32:08,497 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-11-29 23:32:08,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 23:32:08,497 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-11-29 23:32:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 23:32:08,503 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:32:08,503 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:32:08,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 23:32:08,719 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:32:08,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:32:08,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1502460051, now seen corresponding path program 1 times [2020-11-29 23:32:08,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:32:08,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371156350] [2020-11-29 23:32:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:32:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:08,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 23:32:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:08,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 23:32:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:08,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 23:32:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 23:32:08,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371156350] [2020-11-29 23:32:08,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069083479] [2020-11-29 23:32:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/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 23:32:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:08,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 23:32:08,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:32:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 23:32:09,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:32:09,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-11-29 23:32:09,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671466704] [2020-11-29 23:32:09,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:32:09,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:32:09,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:32:09,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:32:09,040 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 9 states. [2020-11-29 23:32:09,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:32:09,320 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-11-29 23:32:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 23:32:09,322 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-11-29 23:32:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:32:09,326 INFO L225 Difference]: With dead ends: 51 [2020-11-29 23:32:09,327 INFO L226 Difference]: Without dead ends: 47 [2020-11-29 23:32:09,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:32:09,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-29 23:32:09,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-29 23:32:09,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 23:32:09,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-11-29 23:32:09,361 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2020-11-29 23:32:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:32:09,362 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-11-29 23:32:09,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:32:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-11-29 23:32:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 23:32:09,368 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:32:09,369 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:32:09,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:32:09,587 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:32:09,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:32:09,587 INFO L82 PathProgramCache]: Analyzing trace with hash -801267146, now seen corresponding path program 1 times [2020-11-29 23:32:09,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:32:09,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747031693] [2020-11-29 23:32:09,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:32:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:09,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 23:32:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:09,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 23:32:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:09,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 23:32:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:09,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 23:32:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:09,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-29 23:32:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 23:32:09,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747031693] [2020-11-29 23:32:09,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027836663] [2020-11-29 23:32:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/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 23:32:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 23:32:09,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:32:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 23:32:09,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:32:09,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-11-29 23:32:09,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961284999] [2020-11-29 23:32:09,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 23:32:09,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:32:09,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 23:32:09,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-29 23:32:09,972 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 11 states. [2020-11-29 23:32:10,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:32:10,389 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2020-11-29 23:32:10,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 23:32:10,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-11-29 23:32:10,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:32:10,396 INFO L225 Difference]: With dead ends: 105 [2020-11-29 23:32:10,396 INFO L226 Difference]: Without dead ends: 63 [2020-11-29 23:32:10,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-29 23:32:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-29 23:32:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-29 23:32:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 23:32:10,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2020-11-29 23:32:10,427 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2020-11-29 23:32:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:32:10,427 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2020-11-29 23:32:10,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 23:32:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2020-11-29 23:32:10,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 23:32:10,434 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:32:10,434 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:32:10,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:32:10,655 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:32:10,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:32:10,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1583643682, now seen corresponding path program 1 times [2020-11-29 23:32:10,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:32:10,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033550338] [2020-11-29 23:32:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:32:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:10,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 23:32:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:10,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 23:32:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:10,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 23:32:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:10,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 23:32:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:10,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 23:32:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 23:32:10,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033550338] [2020-11-29 23:32:10,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770071674] [2020-11-29 23:32:10,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/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 23:32:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:10,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 23:32:10,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:32:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 23:32:11,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:32:11,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-11-29 23:32:11,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029392571] [2020-11-29 23:32:11,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 23:32:11,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:32:11,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 23:32:11,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-11-29 23:32:11,099 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 13 states. [2020-11-29 23:32:11,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:32:11,792 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2020-11-29 23:32:11,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 23:32:11,793 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-11-29 23:32:11,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:32:11,798 INFO L225 Difference]: With dead ends: 177 [2020-11-29 23:32:11,798 INFO L226 Difference]: Without dead ends: 117 [2020-11-29 23:32:11,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-11-29 23:32:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-29 23:32:11,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-11-29 23:32:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-29 23:32:11,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2020-11-29 23:32:11,846 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2020-11-29 23:32:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:32:11,849 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2020-11-29 23:32:11,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 23:32:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2020-11-29 23:32:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-29 23:32:11,857 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:32:11,857 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:32:12,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:32:12,078 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:32:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:32:12,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1063158393, now seen corresponding path program 1 times [2020-11-29 23:32:12,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:32:12,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318188622] [2020-11-29 23:32:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:32:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:12,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 23:32:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:12,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 23:32:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:12,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 23:32:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:12,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 23:32:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:12,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 23:32:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:12,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 23:32:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:12,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 23:32:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-29 23:32:12,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318188622] [2020-11-29 23:32:12,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964863766] [2020-11-29 23:32:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/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 23:32:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:12,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 23:32:12,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:32:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-29 23:32:12,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:32:12,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-11-29 23:32:12,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744742369] [2020-11-29 23:32:12,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 23:32:12,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:32:12,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 23:32:12,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-11-29 23:32:12,532 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand 12 states. [2020-11-29 23:32:13,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:32:13,072 INFO L93 Difference]: Finished difference Result 262 states and 508 transitions. [2020-11-29 23:32:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 23:32:13,075 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-11-29 23:32:13,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:32:13,080 INFO L225 Difference]: With dead ends: 262 [2020-11-29 23:32:13,080 INFO L226 Difference]: Without dead ends: 162 [2020-11-29 23:32:13,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-11-29 23:32:13,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-29 23:32:13,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 139. [2020-11-29 23:32:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-29 23:32:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2020-11-29 23:32:13,165 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 51 [2020-11-29 23:32:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:32:13,167 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2020-11-29 23:32:13,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 23:32:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2020-11-29 23:32:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-29 23:32:13,175 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:32:13,176 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:32:13,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 23:32:13,398 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:32:13,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:32:13,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1235830355, now seen corresponding path program 1 times [2020-11-29 23:32:13,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:32:13,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657843388] [2020-11-29 23:32:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:32:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:13,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 23:32:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:13,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 23:32:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:13,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 23:32:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:13,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 23:32:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:13,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 23:32:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:13,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-29 23:32:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:13,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-29 23:32:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-29 23:32:13,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657843388] [2020-11-29 23:32:13,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326741422] [2020-11-29 23:32:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:32:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:32:13,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 23:32:13,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:32:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-29 23:32:13,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:32:13,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2020-11-29 23:32:13,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709560064] [2020-11-29 23:32:13,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 23:32:13,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:32:13,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 23:32:13,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-11-29 23:32:13,838 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand 13 states. [2020-11-29 23:32:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:32:14,409 INFO L93 Difference]: Finished difference Result 301 states and 580 transitions. [2020-11-29 23:32:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 23:32:14,410 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-11-29 23:32:14,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:32:14,413 INFO L225 Difference]: With dead ends: 301 [2020-11-29 23:32:14,413 INFO L226 Difference]: Without dead ends: 98 [2020-11-29 23:32:14,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-11-29 23:32:14,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-29 23:32:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2020-11-29 23:32:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-29 23:32:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 123 transitions. [2020-11-29 23:32:14,456 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 123 transitions. Word has length 52 [2020-11-29 23:32:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:32:14,458 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 123 transitions. [2020-11-29 23:32:14,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 23:32:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 123 transitions. [2020-11-29 23:32:14,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-29 23:32:14,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:32:14,465 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:32:14,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:32:14,690 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:32:14,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:32:14,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1494883154, now seen corresponding path program 1 times [2020-11-29 23:32:14,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:32:14,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144375741] [2020-11-29 23:32:14,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:32:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:32:14,732 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:32:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:32:14,753 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:32:14,789 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:32:14,790 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 23:32:14,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 23:32:14,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:32:14 BoogieIcfgContainer [2020-11-29 23:32:14,899 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:32:14,900 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:32:14,900 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:32:14,900 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:32:14,901 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:32:06" (3/4) ... [2020-11-29 23:32:14,904 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 23:32:14,992 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_580b6284-0ee4-491a-9a5f-a691d7745fb7/bin/uautomizer/witness.graphml [2020-11-29 23:32:14,992 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:32:14,994 INFO L168 Benchmark]: Toolchain (without parser) took 9060.83 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 82.0 MB in the beginning and 67.6 MB in the end (delta: 14.4 MB). Peak memory consumption was 37.3 MB. Max. memory is 16.1 GB. [2020-11-29 23:32:14,994 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 75.5 MB. Free memory was 32.8 MB in the beginning and 32.7 MB in the end (delta: 31.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:32:14,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.35 ms. Allocated memory is still 115.3 MB. Free memory was 81.8 MB in the beginning and 90.8 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:32:14,995 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.92 ms. Allocated memory is still 115.3 MB. Free memory was 90.8 MB in the beginning and 89.9 MB in the end (delta: 897.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:32:14,995 INFO L168 Benchmark]: Boogie Preprocessor took 23.23 ms. Allocated memory is still 115.3 MB. Free memory was 89.9 MB in the beginning and 88.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:32:14,996 INFO L168 Benchmark]: RCFGBuilder took 401.00 ms. Allocated memory is still 115.3 MB. Free memory was 88.8 MB in the beginning and 75.6 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:32:14,996 INFO L168 Benchmark]: TraceAbstraction took 8125.79 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 75.6 MB in the beginning and 71.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 29.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:32:14,997 INFO L168 Benchmark]: Witness Printer took 92.57 ms. Allocated memory is still 138.4 MB. Free memory was 71.8 MB in the beginning and 67.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 23:32:15,000 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 75.5 MB. Free memory was 32.8 MB in the beginning and 32.7 MB in the end (delta: 31.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 371.35 ms. Allocated memory is still 115.3 MB. Free memory was 81.8 MB in the beginning and 90.8 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.92 ms. Allocated memory is still 115.3 MB. Free memory was 90.8 MB in the beginning and 89.9 MB in the end (delta: 897.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.23 ms. Allocated memory is still 115.3 MB. Free memory was 89.9 MB in the beginning and 88.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 401.00 ms. Allocated memory is still 115.3 MB. Free memory was 88.8 MB in the beginning and 75.6 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8125.79 ms. Allocated memory was 115.3 MB in the beginning and 138.4 MB in the end (delta: 23.1 MB). Free memory was 75.6 MB in the beginning and 71.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 29.6 MB. Max. memory is 16.1 GB. * Witness Printer took 92.57 ms. Allocated memory is still 138.4 MB. Free memory was 71.8 MB in the beginning and 67.6 MB in the end (delta: 4.2 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: [L38] int x = 4; [L39] CALL, EXPR fibo1(x) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 3 [L4] __assert_fail("0", "fibo_2calls_4-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.9s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 218 SDtfs, 252 SDslu, 1044 SDs, 0 SdLazy, 1420 SolverSat, 216 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 390 GetRequests, 288 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 61 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 532 NumberOfCodeBlocks, 532 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 453 ConstructedInterpolants, 0 QuantifiedInterpolants, 31517 SizeOfPredicates, 21 NumberOfNonLiveVariables, 674 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 193/262 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...