./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7a7b79fb8a331a00295fb9ddfb653e17bda3c30d ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.23-635dfa2 [2018-12-01 13:42:10,728 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 13:42:10,729 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 13:42:10,735 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 13:42:10,735 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 13:42:10,736 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 13:42:10,736 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 13:42:10,737 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 13:42:10,738 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 13:42:10,738 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 13:42:10,739 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 13:42:10,739 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 13:42:10,739 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 13:42:10,740 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 13:42:10,740 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 13:42:10,741 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 13:42:10,741 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 13:42:10,742 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 13:42:10,743 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 13:42:10,744 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 13:42:10,744 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 13:42:10,745 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 13:42:10,746 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 13:42:10,746 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 13:42:10,746 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 13:42:10,747 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 13:42:10,747 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 13:42:10,747 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 13:42:10,748 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 13:42:10,748 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 13:42:10,748 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 13:42:10,749 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 13:42:10,749 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 13:42:10,749 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 13:42:10,749 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 13:42:10,750 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 13:42:10,750 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-01 13:42:10,757 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 13:42:10,757 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 13:42:10,758 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 13:42:10,758 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 13:42:10,758 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 13:42:10,758 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 13:42:10,758 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 13:42:10,758 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 13:42:10,758 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 13:42:10,758 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 13:42:10,759 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 13:42:10,759 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 13:42:10,759 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 13:42:10,759 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 13:42:10,759 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 13:42:10,759 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 13:42:10,759 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 13:42:10,759 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 13:42:10,759 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 13:42:10,759 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 13:42:10,759 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 13:42:10,759 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 13:42:10,760 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 13:42:10,760 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 13:42:10,760 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 13:42:10,760 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 13:42:10,760 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 13:42:10,760 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 13:42:10,760 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 13:42:10,760 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 13:42:10,760 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/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(__VERIFIER_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 -> 7a7b79fb8a331a00295fb9ddfb653e17bda3c30d [2018-12-01 13:42:10,778 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 13:42:10,786 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 13:42:10,789 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 13:42:10,790 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 13:42:10,790 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 13:42:10,790 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_false-unreach-call_true-termination.c [2018-12-01 13:42:10,828 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/data/ee24f8669/468911c1e1a14144ab8951316c575267/FLAG7c196b622 [2018-12-01 13:42:11,228 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 13:42:11,228 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/sv-benchmarks/c/recursive-simple/fibo_2calls_4_false-unreach-call_true-termination.c [2018-12-01 13:42:11,232 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/data/ee24f8669/468911c1e1a14144ab8951316c575267/FLAG7c196b622 [2018-12-01 13:42:11,240 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/data/ee24f8669/468911c1e1a14144ab8951316c575267 [2018-12-01 13:42:11,242 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 13:42:11,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 13:42:11,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 13:42:11,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 13:42:11,245 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 13:42:11,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 01:42:11" (1/1) ... [2018-12-01 13:42:11,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489644d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:42:11, skipping insertion in model container [2018-12-01 13:42:11,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 01:42:11" (1/1) ... [2018-12-01 13:42:11,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 13:42:11,262 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 13:42:11,354 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 13:42:11,357 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 13:42:11,366 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 13:42:11,373 INFO L195 MainTranslator]: Completed translation [2018-12-01 13:42:11,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:42:11 WrapperNode [2018-12-01 13:42:11,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 13:42:11,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 13:42:11,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 13:42:11,374 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 13:42:11,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:42:11" (1/1) ... [2018-12-01 13:42:11,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:42:11" (1/1) ... [2018-12-01 13:42:11,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 13:42:11,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 13:42:11,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 13:42:11,386 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 13:42:11,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:42:11" (1/1) ... [2018-12-01 13:42:11,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:42:11" (1/1) ... [2018-12-01 13:42:11,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:42:11" (1/1) ... [2018-12-01 13:42:11,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:42:11" (1/1) ... [2018-12-01 13:42:11,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:42:11" (1/1) ... [2018-12-01 13:42:11,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:42:11" (1/1) ... [2018-12-01 13:42:11,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:42:11" (1/1) ... [2018-12-01 13:42:11,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 13:42:11,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 13:42:11,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 13:42:11,396 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 13:42:11,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:42:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/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 [2018-12-01 13:42:11,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 13:42:11,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 13:42:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 13:42:11,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 13:42:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 13:42:11,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 13:42:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-12-01 13:42:11,456 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-12-01 13:42:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-12-01 13:42:11,456 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-12-01 13:42:11,542 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 13:42:11,542 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-01 13:42:11,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:42:11 BoogieIcfgContainer [2018-12-01 13:42:11,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 13:42:11,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 13:42:11,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 13:42:11,545 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 13:42:11,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 01:42:11" (1/3) ... [2018-12-01 13:42:11,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9f4617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 01:42:11, skipping insertion in model container [2018-12-01 13:42:11,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:42:11" (2/3) ... [2018-12-01 13:42:11,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9f4617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 01:42:11, skipping insertion in model container [2018-12-01 13:42:11,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:42:11" (3/3) ... [2018-12-01 13:42:11,547 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4_false-unreach-call_true-termination.c [2018-12-01 13:42:11,552 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 13:42:11,556 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-01 13:42:11,565 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-01 13:42:11,582 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 13:42:11,582 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 13:42:11,582 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 13:42:11,582 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 13:42:11,582 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 13:42:11,582 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 13:42:11,582 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 13:42:11,582 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 13:42:11,582 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 13:42:11,593 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-12-01 13:42:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-01 13:42:11,596 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:42:11,596 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:42:11,597 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:42:11,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:42:11,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-12-01 13:42:11,602 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:42:11,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:42:11,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:11,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:11,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:42:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:42:11,696 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 13:42:11,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 13:42:11,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 13:42:11,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 13:42:11,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 13:42:11,708 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-12-01 13:42:11,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:42:11,760 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-12-01 13:42:11,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 13:42:11,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-01 13:42:11,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:42:11,767 INFO L225 Difference]: With dead ends: 44 [2018-12-01 13:42:11,767 INFO L226 Difference]: Without dead ends: 30 [2018-12-01 13:42:11,769 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-01 13:42:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-01 13:42:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-01 13:42:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-01 13:42:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-01 13:42:11,794 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-12-01 13:42:11,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:42:11,794 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-01 13:42:11,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 13:42:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-01 13:42:11,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-01 13:42:11,796 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:42:11,796 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:42:11,796 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:42:11,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:42:11,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-12-01 13:42:11,796 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:42:11,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:42:11,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:11,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:11,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:42:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:42:11,817 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 13:42:11,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 13:42:11,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 13:42:11,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 13:42:11,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 13:42:11,819 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-12-01 13:42:11,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:42:11,860 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-12-01 13:42:11,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 13:42:11,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-01 13:42:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:42:11,861 INFO L225 Difference]: With dead ends: 36 [2018-12-01 13:42:11,861 INFO L226 Difference]: Without dead ends: 32 [2018-12-01 13:42:11,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-01 13:42:11,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-01 13:42:11,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-01 13:42:11,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-01 13:42:11,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-01 13:42:11,866 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-12-01 13:42:11,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:42:11,867 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-01 13:42:11,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 13:42:11,867 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-01 13:42:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-01 13:42:11,868 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:42:11,868 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:42:11,868 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:42:11,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:42:11,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-12-01 13:42:11,868 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:42:11,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:42:11,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:11,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:11,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:42:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 13:42:11,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:42:11,911 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 13:42:11,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:42:11,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:42:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 13:42:11,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:42:11,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-12-01 13:42:11,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 13:42:11,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 13:42:11,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-01 13:42:11,995 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-12-01 13:42:12,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:42:12,107 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-12-01 13:42:12,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-01 13:42:12,107 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-12-01 13:42:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:42:12,108 INFO L225 Difference]: With dead ends: 58 [2018-12-01 13:42:12,108 INFO L226 Difference]: Without dead ends: 34 [2018-12-01 13:42:12,108 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-12-01 13:42:12,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-01 13:42:12,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-12-01 13:42:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-01 13:42:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-12-01 13:42:12,112 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-12-01 13:42:12,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:42:12,112 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-12-01 13:42:12,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 13:42:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-12-01 13:42:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-01 13:42:12,113 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:42:12,113 INFO L402 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, 1, 1, 1] [2018-12-01 13:42:12,113 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:42:12,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:42:12,114 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-12-01 13:42:12,114 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:42:12,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:42:12,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:12,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:12,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:42:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 13:42:12,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:42:12,152 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 13:42:12,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:42:12,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:42:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 13:42:12,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:42:12,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-01 13:42:12,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-01 13:42:12,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-01 13:42:12,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-01 13:42:12,187 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-12-01 13:42:12,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:42:12,246 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-12-01 13:42:12,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 13:42:12,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-12-01 13:42:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:42:12,248 INFO L225 Difference]: With dead ends: 43 [2018-12-01 13:42:12,248 INFO L226 Difference]: Without dead ends: 39 [2018-12-01 13:42:12,249 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-12-01 13:42:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-01 13:42:12,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-12-01 13:42:12,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-01 13:42:12,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-12-01 13:42:12,255 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-12-01 13:42:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:42:12,255 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-12-01 13:42:12,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-01 13:42:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-12-01 13:42:12,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-01 13:42:12,257 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:42:12,257 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:42:12,257 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:42:12,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:42:12,257 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-12-01 13:42:12,257 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:42:12,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:42:12,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:12,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:12,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:42:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-01 13:42:12,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:42:12,304 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 13:42:12,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:42:12,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:42:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-01 13:42:12,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:42:12,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-12-01 13:42:12,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-01 13:42:12,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-01 13:42:12,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-12-01 13:42:12,380 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-12-01 13:42:12,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:42:12,490 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-12-01 13:42:12,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-01 13:42:12,490 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-12-01 13:42:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:42:12,491 INFO L225 Difference]: With dead ends: 70 [2018-12-01 13:42:12,491 INFO L226 Difference]: Without dead ends: 39 [2018-12-01 13:42:12,492 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-12-01 13:42:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-01 13:42:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-01 13:42:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-01 13:42:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-12-01 13:42:12,496 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-12-01 13:42:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:42:12,496 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-12-01 13:42:12,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-01 13:42:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-12-01 13:42:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-01 13:42:12,497 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:42:12,497 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:42:12,497 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:42:12,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:42:12,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-12-01 13:42:12,497 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:42:12,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:42:12,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:12,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:12,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:42:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-01 13:42:12,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:42:12,535 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 13:42:12,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:42:12,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:42:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-01 13:42:12,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:42:12,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-12-01 13:42:12,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-01 13:42:12,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-01 13:42:12,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-01 13:42:12,608 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-12-01 13:42:12,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:42:12,700 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-12-01 13:42:12,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-01 13:42:12,700 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-12-01 13:42:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:42:12,701 INFO L225 Difference]: With dead ends: 61 [2018-12-01 13:42:12,701 INFO L226 Difference]: Without dead ends: 57 [2018-12-01 13:42:12,702 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-12-01 13:42:12,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-01 13:42:12,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-12-01 13:42:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-01 13:42:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-12-01 13:42:12,708 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-12-01 13:42:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:42:12,709 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-12-01 13:42:12,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-01 13:42:12,709 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-12-01 13:42:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-12-01 13:42:12,710 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:42:12,710 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:42:12,710 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:42:12,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:42:12,710 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-12-01 13:42:12,710 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:42:12,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:42:12,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:12,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:12,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:42:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-01 13:42:12,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:42:12,757 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 13:42:12,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:42:12,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:42:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-01 13:42:12,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:42:12,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2018-12-01 13:42:12,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 13:42:12,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 13:42:12,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-01 13:42:12,811 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 9 states. [2018-12-01 13:42:12,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:42:12,879 INFO L93 Difference]: Finished difference Result 66 states and 104 transitions. [2018-12-01 13:42:12,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 13:42:12,880 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2018-12-01 13:42:12,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:42:12,880 INFO L225 Difference]: With dead ends: 66 [2018-12-01 13:42:12,881 INFO L226 Difference]: Without dead ends: 62 [2018-12-01 13:42:12,881 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-12-01 13:42:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-01 13:42:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2018-12-01 13:42:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-01 13:42:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2018-12-01 13:42:12,886 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 54 [2018-12-01 13:42:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:42:12,887 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2018-12-01 13:42:12,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 13:42:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2018-12-01 13:42:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-01 13:42:12,888 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:42:12,888 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:42:12,888 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:42:12,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:42:12,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1822439602, now seen corresponding path program 1 times [2018-12-01 13:42:12,889 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:42:12,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:42:12,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:12,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:12,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:42:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-12-01 13:42:12,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:42:12,976 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 13:42:12,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:42:12,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:42:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 44 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-12-01 13:42:13,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:42:13,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2018-12-01 13:42:13,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-01 13:42:13,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-01 13:42:13,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-12-01 13:42:13,044 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand 12 states. [2018-12-01 13:42:13,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:42:13,128 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2018-12-01 13:42:13,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 13:42:13,128 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2018-12-01 13:42:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:42:13,129 INFO L225 Difference]: With dead ends: 59 [2018-12-01 13:42:13,129 INFO L226 Difference]: Without dead ends: 55 [2018-12-01 13:42:13,129 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-12-01 13:42:13,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-01 13:42:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2018-12-01 13:42:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-01 13:42:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2018-12-01 13:42:13,133 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 81 [2018-12-01 13:42:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:42:13,134 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2018-12-01 13:42:13,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-01 13:42:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2018-12-01 13:42:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-01 13:42:13,135 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:42:13,135 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:42:13,135 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:42:13,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:42:13,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 2 times [2018-12-01 13:42:13,135 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:42:13,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:42:13,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:13,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:42:13,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:42:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:42:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:42:13,158 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-01 13:42:13,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 01:42:13 BoogieIcfgContainer [2018-12-01 13:42:13,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 13:42:13,176 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 13:42:13,176 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 13:42:13,176 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 13:42:13,176 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:42:11" (3/4) ... [2018-12-01 13:42:13,178 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-01 13:42:13,207 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_705800b0-1198-440e-8526-646fcb9ccaf6/bin-2019/uautomizer/witness.graphml [2018-12-01 13:42:13,207 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 13:42:13,208 INFO L168 Benchmark]: Toolchain (without parser) took 1965.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 205.5 MB). Free memory was 960.3 MB in the beginning and 1.2 GB in the end (delta: -200.6 MB). Peak memory consumption was 4.9 MB. Max. memory is 11.5 GB. [2018-12-01 13:42:13,208 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:42:13,209 INFO L168 Benchmark]: CACSL2BoogieTranslator took 130.99 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-01 13:42:13,209 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.07 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:42:13,209 INFO L168 Benchmark]: Boogie Preprocessor took 10.26 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:42:13,209 INFO L168 Benchmark]: RCFGBuilder took 146.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -167.0 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2018-12-01 13:42:13,209 INFO L168 Benchmark]: TraceAbstraction took 1633.06 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -49.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2018-12-01 13:42:13,209 INFO L168 Benchmark]: Witness Printer took 31.13 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:42:13,210 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 130.99 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.07 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.26 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 146.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -167.0 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1633.06 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -49.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * Witness Printer took 31.13 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 4; VAL [x=4] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=3, x=4] [L37] int result = fibo1(x); [L38] COND TRUE result == 3 VAL [result=3, x=4] [L39] __VERIFIER_error() VAL [result=3, x=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. UNSAFE Result, 1.5s OverallTime, 9 OverallIterations, 6 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 198 SDtfs, 150 SDslu, 800 SDs, 0 SdLazy, 748 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 351 GetRequests, 271 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 43 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 629 NumberOfCodeBlocks, 629 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 547 ConstructedInterpolants, 0 QuantifiedInterpolants, 47903 SizeOfPredicates, 22 NumberOfNonLiveVariables, 606 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 343/426 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...