./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.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_2195465c-d33a-4962-9506-335bbf62f92f/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/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 557a695617b4e9b94623290cf2a16a969b4f7de0 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:51:26,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:51:26,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:51:26,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:51:26,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:51:26,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:51:26,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:51:26,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:51:26,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:51:26,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:51:26,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:51:26,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:51:26,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:51:26,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:51:26,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:51:26,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:51:26,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:51:26,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:51:26,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:51:26,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:51:26,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:51:26,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:51:26,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:51:26,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:51:26,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:51:26,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:51:26,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:51:26,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:51:26,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:51:26,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:51:26,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:51:27,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:51:27,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:51:27,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:51:27,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:51:27,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:51:27,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:51:27,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:51:27,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:51:27,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:51:27,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:51:27,011 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:51:27,039 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:51:27,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:51:27,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:51:27,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:51:27,042 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:51:27,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:51:27,045 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:51:27,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:51:27,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:51:27,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:51:27,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:51:27,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:51:27,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:51:27,049 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:51:27,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:51:27,050 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:51:27,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:51:27,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:51:27,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:51:27,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:51:27,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:51:27,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:51:27,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:51:27,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:51:27,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:51:27,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:51:27,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:51:27,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:51:27,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:51:27,055 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_2195465c-d33a-4962-9506-335bbf62f92f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 557a695617b4e9b94623290cf2a16a969b4f7de0 [2020-11-29 19:51:27,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:51:27,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:51:27,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:51:27,385 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:51:27,387 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:51:27,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2020-11-29 19:51:27,487 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/bin/uautomizer/data/ac73c8706/400be33db7044c6cb58bd65a4fca8d74/FLAGb4e0b59bb [2020-11-29 19:51:28,035 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:51:28,037 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2020-11-29 19:51:28,051 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/bin/uautomizer/data/ac73c8706/400be33db7044c6cb58bd65a4fca8d74/FLAGb4e0b59bb [2020-11-29 19:51:28,378 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/bin/uautomizer/data/ac73c8706/400be33db7044c6cb58bd65a4fca8d74 [2020-11-29 19:51:28,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:51:28,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:51:28,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:51:28,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:51:28,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:51:28,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:51:28" (1/1) ... [2020-11-29 19:51:28,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fe2a35d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:28, skipping insertion in model container [2020-11-29 19:51:28,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:51:28" (1/1) ... [2020-11-29 19:51:28,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:51:28,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:51:28,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:51:28,659 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:51:28,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:51:28,692 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:51:28,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:28 WrapperNode [2020-11-29 19:51:28,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:51:28,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:51:28,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:51:28,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:51:28,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:28" (1/1) ... [2020-11-29 19:51:28,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:28" (1/1) ... [2020-11-29 19:51:28,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:51:28,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:51:28,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:51:28,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:51:28,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:28" (1/1) ... [2020-11-29 19:51:28,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:28" (1/1) ... [2020-11-29 19:51:28,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:28" (1/1) ... [2020-11-29 19:51:28,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:28" (1/1) ... [2020-11-29 19:51:28,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:28" (1/1) ... [2020-11-29 19:51:28,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:28" (1/1) ... [2020-11-29 19:51:28,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:28" (1/1) ... [2020-11-29 19:51:28,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:51:28,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:51:28,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:51:28,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:51:28,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/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 19:51:28,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:51:28,855 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-29 19:51:28,855 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-29 19:51:28,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:51:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-29 19:51:28,857 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-29 19:51:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:51:28,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:51:29,227 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:51:29,228 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 19:51:29,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:51:29 BoogieIcfgContainer [2020-11-29 19:51:29,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:51:29,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:51:29,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:51:29,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:51:29,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:51:28" (1/3) ... [2020-11-29 19:51:29,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53370be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:51:29, skipping insertion in model container [2020-11-29 19:51:29,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:28" (2/3) ... [2020-11-29 19:51:29,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53370be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:51:29, skipping insertion in model container [2020-11-29 19:51:29,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:51:29" (3/3) ... [2020-11-29 19:51:29,238 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-11-29 19:51:29,249 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:51:29,254 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:51:29,274 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:51:29,302 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:51:29,302 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:51:29,302 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:51:29,302 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:51:29,302 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:51:29,302 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:51:29,303 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:51:29,303 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:51:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-11-29 19:51:29,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:51:29,326 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:51:29,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:51:29,327 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:51:29,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:51:29,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2146840844, now seen corresponding path program 1 times [2020-11-29 19:51:29,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:51:29,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021617406] [2020-11-29 19:51:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:51:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:29,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:51:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:29,616 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 19:51:29,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021617406] [2020-11-29 19:51:29,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:51:29,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:51:29,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913353637] [2020-11-29 19:51:29,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:51:29,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:51:29,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:51:29,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:51:29,648 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-11-29 19:51:29,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:51:29,801 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-11-29 19:51:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:51:29,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 19:51:29,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:51:29,815 INFO L225 Difference]: With dead ends: 40 [2020-11-29 19:51:29,816 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 19:51:29,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:51:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 19:51:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 19:51:29,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 19:51:29,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-29 19:51:29,883 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-11-29 19:51:29,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:51:29,883 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-29 19:51:29,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:51:29,884 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-29 19:51:29,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 19:51:29,886 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:51:29,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:51:29,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:51:29,887 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:51:29,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:51:29,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1412337332, now seen corresponding path program 1 times [2020-11-29 19:51:29,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:51:29,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665785367] [2020-11-29 19:51:29,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:51:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:29,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:51:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:30,017 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 19:51:30,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665785367] [2020-11-29 19:51:30,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:51:30,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:51:30,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633887890] [2020-11-29 19:51:30,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:51:30,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:51:30,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:51:30,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:51:30,041 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-11-29 19:51:30,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:51:30,143 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-11-29 19:51:30,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:51:30,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-29 19:51:30,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:51:30,146 INFO L225 Difference]: With dead ends: 33 [2020-11-29 19:51:30,146 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 19:51:30,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:51:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 19:51:30,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-29 19:51:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 19:51:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-29 19:51:30,157 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-11-29 19:51:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:51:30,157 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-29 19:51:30,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:51:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-29 19:51:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:51:30,159 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:51:30,160 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 19:51:30,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:51:30,160 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:51:30,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:51:30,161 INFO L82 PathProgramCache]: Analyzing trace with hash -888595213, now seen corresponding path program 1 times [2020-11-29 19:51:30,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:51:30,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362538952] [2020-11-29 19:51:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:51:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:30,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:51:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:30,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:51:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:30,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 19:51:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:30,505 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 19:51:30,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362538952] [2020-11-29 19:51:30,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761715539] [2020-11-29 19:51:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/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 19:51:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:30,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:51:30,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:51:30,787 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 19:51:30,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:51:30,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-11-29 19:51:30,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561299878] [2020-11-29 19:51:30,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:51:30,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:51:30,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:51:30,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:51:30,791 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 11 states. [2020-11-29 19:51:31,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:51:31,162 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-11-29 19:51:31,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:51:31,164 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-11-29 19:51:31,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:51:31,166 INFO L225 Difference]: With dead ends: 55 [2020-11-29 19:51:31,166 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 19:51:31,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:51:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 19:51:31,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-11-29 19:51:31,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 19:51:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-11-29 19:51:31,176 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-11-29 19:51:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:51:31,176 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-11-29 19:51:31,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:51:31,177 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-11-29 19:51:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 19:51:31,179 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:51:31,179 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 19:51:31,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 19:51:31,407 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:51:31,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:51:31,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1502460051, now seen corresponding path program 1 times [2020-11-29 19:51:31,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:51:31,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958664547] [2020-11-29 19:51:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:51:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:31,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:51:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:31,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:51:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:31,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 19:51:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 19:51:31,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958664547] [2020-11-29 19:51:31,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000752007] [2020-11-29 19:51:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/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 19:51:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:31,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:51:31,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:51:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 19:51:31,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:51:31,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 19:51:31,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041950633] [2020-11-29 19:51:31,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:51:31,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:51:31,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:51:31,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:51:31,935 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 10 states. [2020-11-29 19:51:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:51:32,030 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2020-11-29 19:51:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:51:32,033 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-11-29 19:51:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:51:32,035 INFO L225 Difference]: With dead ends: 43 [2020-11-29 19:51:32,035 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 19:51:32,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:51:32,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 19:51:32,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-11-29 19:51:32,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-29 19:51:32,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2020-11-29 19:51:32,053 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2020-11-29 19:51:32,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:51:32,054 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2020-11-29 19:51:32,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:51:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2020-11-29 19:51:32,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 19:51:32,055 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:51:32,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:51:32,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:32,275 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:51:32,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:51:32,276 INFO L82 PathProgramCache]: Analyzing trace with hash 697382345, now seen corresponding path program 1 times [2020-11-29 19:51:32,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:51:32,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415770986] [2020-11-29 19:51:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:51:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:32,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:51:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:32,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:51:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:32,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 19:51:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 19:51:32,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415770986] [2020-11-29 19:51:32,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165718017] [2020-11-29 19:51:32,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/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 19:51:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:32,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:51:32,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:51:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:51:32,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:51:32,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2020-11-29 19:51:32,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373935706] [2020-11-29 19:51:32,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:51:32,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:51:32,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:51:32,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:51:32,666 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 7 states. [2020-11-29 19:51:32,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:51:32,818 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-11-29 19:51:32,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:51:32,818 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-11-29 19:51:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:51:32,820 INFO L225 Difference]: With dead ends: 41 [2020-11-29 19:51:32,820 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 19:51:32,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-11-29 19:51:32,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 19:51:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-11-29 19:51:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-29 19:51:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2020-11-29 19:51:32,846 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 25 [2020-11-29 19:51:32,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:51:32,847 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2020-11-29 19:51:32,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:51:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2020-11-29 19:51:32,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 19:51:32,849 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:51:32,849 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 19:51:33,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:33,063 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:51:33,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:51:33,064 INFO L82 PathProgramCache]: Analyzing trace with hash -801267146, now seen corresponding path program 1 times [2020-11-29 19:51:33,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:51:33,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624728622] [2020-11-29 19:51:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:51:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:33,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 19:51:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:33,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:51:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:33,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 19:51:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:33,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 19:51:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:33,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-29 19:51:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:33,231 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 19:51:33,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624728622] [2020-11-29 19:51:33,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790388536] [2020-11-29 19:51:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/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 19:51:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:33,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:51:33,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:51:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 19:51:33,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:51:33,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-11-29 19:51:33,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500925969] [2020-11-29 19:51:33,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 19:51:33,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:51:33,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 19:51:33,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-11-29 19:51:33,422 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 13 states. [2020-11-29 19:51:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:51:33,672 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2020-11-29 19:51:33,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:51:33,672 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-11-29 19:51:33,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:51:33,673 INFO L225 Difference]: With dead ends: 66 [2020-11-29 19:51:33,673 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 19:51:33,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:51:33,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 19:51:33,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 19:51:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 19:51:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 19:51:33,675 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-11-29 19:51:33,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:51:33,675 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:51:33,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 19:51:33,676 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:51:33,676 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 19:51:33,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:33,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 19:51:34,116 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 19:51:34,116 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 19:51:34,116 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 19:51:34,116 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 19:51:34,117 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-29 19:51:34,117 INFO L270 CegarLoopResult]: At program point L43(lines 37 44) the Hoare annotation is: (= ULTIMATE.start_main_~x~0 2) [2020-11-29 19:51:34,117 INFO L274 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-11-29 19:51:34,117 INFO L274 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-11-29 19:51:34,117 INFO L270 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (= ULTIMATE.start_main_~x~0 2) [2020-11-29 19:51:34,117 INFO L274 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-11-29 19:51:34,117 INFO L274 CegarLoopResult]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2020-11-29 19:51:34,118 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-29 19:51:34,118 INFO L277 CegarLoopResult]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2020-11-29 19:51:34,118 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-11-29 19:51:34,118 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-29 19:51:34,118 INFO L270 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-11-29 19:51:34,118 INFO L274 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-11-29 19:51:34,118 INFO L274 CegarLoopResult]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-11-29 19:51:34,118 INFO L274 CegarLoopResult]: For program point L20(lines 20 26) no Hoare annotation was computed. [2020-11-29 19:51:34,118 INFO L274 CegarLoopResult]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2020-11-29 19:51:34,122 INFO L274 CegarLoopResult]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2020-11-29 19:51:34,122 INFO L277 CegarLoopResult]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2020-11-29 19:51:34,122 INFO L270 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-11-29 19:51:34,122 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-11-29 19:51:34,123 INFO L270 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 1 |fibo1_#t~ret7|) (< 1 fibo1_~n) (<= |fibo1_#t~ret7| 1) .cse0) (and .cse0 (< 2 |fibo1_#in~n|)))) [2020-11-29 19:51:34,123 INFO L274 CegarLoopResult]: For program point L12(lines 12 16) no Hoare annotation was computed. [2020-11-29 19:51:34,123 INFO L274 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-11-29 19:51:34,123 INFO L274 CegarLoopResult]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2020-11-29 19:51:34,123 INFO L274 CegarLoopResult]: For program point L10(lines 10 16) no Hoare annotation was computed. [2020-11-29 19:51:34,123 INFO L274 CegarLoopResult]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2020-11-29 19:51:34,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:51:34 BoogieIcfgContainer [2020-11-29 19:51:34,141 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:51:34,142 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:51:34,142 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:51:34,142 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:51:34,142 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:51:29" (3/4) ... [2020-11-29 19:51:34,146 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 19:51:34,153 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2020-11-29 19:51:34,153 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2020-11-29 19:51:34,160 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-29 19:51:34,160 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 19:51:34,160 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:51:34,160 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 19:51:34,219 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2195465c-d33a-4962-9506-335bbf62f92f/bin/uautomizer/witness.graphml [2020-11-29 19:51:34,219 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:51:34,221 INFO L168 Benchmark]: Toolchain (without parser) took 5837.65 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 59.3 MB in the beginning and 87.7 MB in the end (delta: -28.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:51:34,222 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 92.3 MB. Free memory is still 48.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:51:34,222 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.14 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 59.1 MB in the beginning and 87.5 MB in the end (delta: -28.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:51:34,223 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.55 ms. Allocated memory is still 111.1 MB. Free memory was 87.5 MB in the beginning and 86.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:51:34,224 INFO L168 Benchmark]: Boogie Preprocessor took 26.52 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 85.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:51:34,224 INFO L168 Benchmark]: RCFGBuilder took 470.13 ms. Allocated memory is still 111.1 MB. Free memory was 85.4 MB in the beginning and 72.3 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:51:34,225 INFO L168 Benchmark]: TraceAbstraction took 4910.26 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 71.8 MB in the beginning and 90.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:51:34,225 INFO L168 Benchmark]: Witness Printer took 77.71 ms. Allocated memory is still 134.2 MB. Free memory was 90.8 MB in the beginning and 87.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:51:34,227 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 92.3 MB. Free memory is still 48.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 294.14 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 59.1 MB in the beginning and 87.5 MB in the end (delta: -28.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.55 ms. Allocated memory is still 111.1 MB. Free memory was 87.5 MB in the beginning and 86.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.52 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 85.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 470.13 ms. Allocated memory is still 111.1 MB. Free memory was 85.4 MB in the beginning and 72.3 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4910.26 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 71.8 MB in the beginning and 90.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Witness Printer took 77.71 ms. Allocated memory is still 134.2 MB. Free memory was 90.8 MB in the beginning and 87.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: x == 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.5s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 149 SDtfs, 97 SDslu, 685 SDs, 0 SdLazy, 486 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 190 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, 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, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 47 PreInvPairs, 57 NumberOfFragments, 50 HoareAnnotationTreeSize, 47 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 37 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 227 ConstructedInterpolants, 0 QuantifiedInterpolants, 12941 SizeOfPredicates, 10 NumberOfNonLiveVariables, 355 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 35/58 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...