./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/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 266436f0336fa87343e9fe2aac074f47fa1a621a ................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-11-30 01:13:49,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:13:49,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:13:49,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:13:49,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:13:49,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:13:49,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:13:49,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:13:49,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:13:49,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:13:49,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:13:49,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:13:49,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:13:49,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:13:49,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:13:50,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:13:50,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:13:50,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:13:50,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:13:50,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:13:50,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:13:50,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:13:50,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:13:50,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:13:50,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:13:50,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:13:50,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:13:50,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:13:50,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:13:50,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:13:50,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:13:50,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:13:50,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:13:50,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:13:50,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:13:50,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:13:50,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:13:50,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:13:50,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:13:50,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:13:50,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:13:50,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:13:50,074 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:13:50,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:13:50,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:13:50,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:13:50,081 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:13:50,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:13:50,082 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:13:50,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:13:50,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:13:50,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:13:50,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:13:50,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:13:50,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:13:50,084 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:13:50,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:13:50,085 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:13:50,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:13:50,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:13:50,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:13:50,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:13:50,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:13:50,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:13:50,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:13:50,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:13:50,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:13:50,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:13:50,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:13:50,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:13:50,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:13:50,088 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_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 266436f0336fa87343e9fe2aac074f47fa1a621a [2020-11-30 01:13:50,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:13:50,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:13:50,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:13:50,383 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:13:50,384 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:13:50,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c [2020-11-30 01:13:50,452 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/bin/uautomizer/data/d58d740d3/ae25f03526014537a2ca09fcb490d976/FLAG416468390 [2020-11-30 01:13:50,926 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:13:50,927 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/sv-benchmarks/c/recursive-simple/fibo_2calls_2-1.c [2020-11-30 01:13:50,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/bin/uautomizer/data/d58d740d3/ae25f03526014537a2ca09fcb490d976/FLAG416468390 [2020-11-30 01:13:51,309 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/bin/uautomizer/data/d58d740d3/ae25f03526014537a2ca09fcb490d976 [2020-11-30 01:13:51,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:13:51,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:13:51,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:13:51,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:13:51,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:13:51,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:13:51" (1/1) ... [2020-11-30 01:13:51,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@122af416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:51, skipping insertion in model container [2020-11-30 01:13:51,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:13:51" (1/1) ... [2020-11-30 01:13:51,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:13:51,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:13:51,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:13:51,526 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:13:51,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:13:51,555 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:13:51,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:51 WrapperNode [2020-11-30 01:13:51,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:13:51,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:13:51,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:13:51,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:13:51,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:51" (1/1) ... [2020-11-30 01:13:51,582 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:51" (1/1) ... [2020-11-30 01:13:51,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:13:51,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:13:51,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:13:51,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:13:51,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:51" (1/1) ... [2020-11-30 01:13:51,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:51" (1/1) ... [2020-11-30 01:13:51,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:51" (1/1) ... [2020-11-30 01:13:51,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:51" (1/1) ... [2020-11-30 01:13:51,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:51" (1/1) ... [2020-11-30 01:13:51,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:51" (1/1) ... [2020-11-30 01:13:51,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:51" (1/1) ... [2020-11-30 01:13:51,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:13:51,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:13:51,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:13:51,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:13:51,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:13:51,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:13:51,720 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-30 01:13:51,721 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-30 01:13:51,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:13:51,722 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-30 01:13:51,722 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-30 01:13:51,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:13:51,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:13:52,009 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:13:52,022 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 01:13:52,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:13:52 BoogieIcfgContainer [2020-11-30 01:13:52,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:13:52,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:13:52,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:13:52,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:13:52,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:13:51" (1/3) ... [2020-11-30 01:13:52,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6539350d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:13:52, skipping insertion in model container [2020-11-30 01:13:52,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:13:51" (2/3) ... [2020-11-30 01:13:52,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6539350d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:13:52, skipping insertion in model container [2020-11-30 01:13:52,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:13:52" (3/3) ... [2020-11-30 01:13:52,039 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2020-11-30 01:13:52,066 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:13:52,070 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:13:52,095 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:13:52,122 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:13:52,123 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:13:52,123 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:13:52,123 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:13:52,123 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:13:52,123 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:13:52,123 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:13:52,124 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:13:52,138 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-11-30 01:13:52,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:13:52,146 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:13:52,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:13:52,147 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:13:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:13:52,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2146840844, now seen corresponding path program 1 times [2020-11-30 01:13:52,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:13:52,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416055885] [2020-11-30 01:13:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:13:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:52,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:13:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:13:52,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416055885] [2020-11-30 01:13:52,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:13:52,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:13:52,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439647993] [2020-11-30 01:13:52,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:13:52,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:13:52,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:13:52,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:13:52,401 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-11-30 01:13:52,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:13:52,547 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-11-30 01:13:52,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:13:52,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 01:13:52,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:13:52,559 INFO L225 Difference]: With dead ends: 40 [2020-11-30 01:13:52,559 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 01:13:52,562 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 [2020-11-30 01:13:52,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 01:13:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 01:13:52,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:13:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-30 01:13:52,606 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-11-30 01:13:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:13:52,607 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-30 01:13:52,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:13:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-30 01:13:52,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:13:52,609 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:13:52,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:13:52,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:13:52,610 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:13:52,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:13:52,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1412337332, now seen corresponding path program 1 times [2020-11-30 01:13:52,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:13:52,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724544410] [2020-11-30 01:13:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:13:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:52,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:13:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:13:52,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724544410] [2020-11-30 01:13:52,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:13:52,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:13:52,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243588107] [2020-11-30 01:13:52,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:13:52,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:13:52,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:13:52,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:13:52,681 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-11-30 01:13:52,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:13:52,746 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-11-30 01:13:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:13:52,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 01:13:52,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:13:52,750 INFO L225 Difference]: With dead ends: 33 [2020-11-30 01:13:52,750 INFO L226 Difference]: Without dead ends: 29 [2020-11-30 01:13:52,751 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 [2020-11-30 01:13:52,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-30 01:13:52,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-30 01:13:52,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:13:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-30 01:13:52,759 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-11-30 01:13:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:13:52,759 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-30 01:13:52,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:13:52,763 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-30 01:13:52,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 01:13:52,765 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:13:52,766 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] [2020-11-30 01:13:52,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:13:52,768 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:13:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:13:52,769 INFO L82 PathProgramCache]: Analyzing trace with hash -888595213, now seen corresponding path program 1 times [2020-11-30 01:13:52,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:13:52,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536857830] [2020-11-30 01:13:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:13:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:52,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:13:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:52,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:13:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:52,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 01:13:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:13:52,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536857830] [2020-11-30 01:13:52,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570527008] [2020-11-30 01:13:52,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/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 [2020-11-30 01:13:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:13:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:13:53,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:13:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:13:53,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:13:53,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-11-30 01:13:53,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633018846] [2020-11-30 01:13:53,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:13:53,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:13:53,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:13:53,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:13:53,164 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 11 states. [2020-11-30 01:13:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:13:53,429 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-11-30 01:13:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:13:53,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-11-30 01:13:53,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:13:53,432 INFO L225 Difference]: With dead ends: 55 [2020-11-30 01:13:53,432 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 01:13:53,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:13:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 01:13:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-11-30 01:13:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-30 01:13:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-11-30 01:13:53,448 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-11-30 01:13:53,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:13:53,450 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-11-30 01:13:53,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:13:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-11-30 01:13:53,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 01:13:53,455 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:13:53,456 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] [2020-11-30 01:13:53,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 01:13:53,671 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:13:53,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:13:53,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1502460051, now seen corresponding path program 1 times [2020-11-30 01:13:53,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:13:53,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613193672] [2020-11-30 01:13:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:13:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:13:53,686 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:13:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:13:53,712 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:13:53,744 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:13:53,744 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:13:53,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:13:53,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:13:53 BoogieIcfgContainer [2020-11-30 01:13:53,809 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:13:53,809 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:13:53,810 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:13:53,810 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:13:53,811 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:13:52" (3/4) ... [2020-11-30 01:13:53,813 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:13:53,860 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ed4b8610-bfe3-4f8b-9500-1f8b6508816f/bin/uautomizer/witness.graphml [2020-11-30 01:13:53,860 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:13:53,862 INFO L168 Benchmark]: Toolchain (without parser) took 2548.02 ms. Allocated memory was 115.3 MB in the beginning and 151.0 MB in the end (delta: 35.7 MB). Free memory was 90.6 MB in the beginning and 94.0 MB in the end (delta: -3.3 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. [2020-11-30 01:13:53,863 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:13:53,864 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.00 ms. Allocated memory is still 115.3 MB. Free memory was 90.4 MB in the beginning and 92.8 MB in the end (delta: -2.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:13:53,864 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.83 ms. Allocated memory is still 115.3 MB. Free memory was 92.8 MB in the beginning and 91.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:13:53,865 INFO L168 Benchmark]: Boogie Preprocessor took 21.04 ms. Allocated memory is still 115.3 MB. Free memory was 91.3 MB in the beginning and 90.5 MB in the end (delta: 839.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:13:53,866 INFO L168 Benchmark]: RCFGBuilder took 404.76 ms. Allocated memory is still 115.3 MB. Free memory was 90.5 MB in the beginning and 77.7 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:13:53,867 INFO L168 Benchmark]: TraceAbstraction took 1782.95 ms. Allocated memory was 115.3 MB in the beginning and 151.0 MB in the end (delta: 35.7 MB). Free memory was 77.4 MB in the beginning and 96.1 MB in the end (delta: -18.6 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.1 GB. [2020-11-30 01:13:53,868 INFO L168 Benchmark]: Witness Printer took 50.91 ms. Allocated memory is still 151.0 MB. Free memory was 96.1 MB in the beginning and 94.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:13:53,872 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 243.00 ms. Allocated memory is still 115.3 MB. Free memory was 90.4 MB in the beginning and 92.8 MB in the end (delta: -2.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.83 ms. Allocated memory is still 115.3 MB. Free memory was 92.8 MB in the beginning and 91.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.04 ms. Allocated memory is still 115.3 MB. Free memory was 91.3 MB in the beginning and 90.5 MB in the end (delta: 839.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 404.76 ms. Allocated memory is still 115.3 MB. Free memory was 90.5 MB in the beginning and 77.7 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1782.95 ms. Allocated memory was 115.3 MB in the beginning and 151.0 MB in the end (delta: 35.7 MB). Free memory was 77.4 MB in the beginning and 96.1 MB in the end (delta: -18.6 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.1 GB. * Witness Printer took 50.91 ms. Allocated memory is still 151.0 MB. Free memory was 96.1 MB in the beginning and 94.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L38] int x = 2; [L39] CALL, EXPR fibo1(x) 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); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 1 [L4] __assert_fail("0", "fibo_2calls_2-1.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: 1.6s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 51 SDslu, 232 SDs, 0 SdLazy, 195 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 2113 SizeOfPredicates, 3 NumberOfNonLiveVariables, 81 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/8 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...