./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.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 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/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_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/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 0.1.23-1dbac8b [2018-11-10 03:39:07,453 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 03:39:07,454 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 03:39:07,463 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 03:39:07,464 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 03:39:07,464 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 03:39:07,465 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 03:39:07,467 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 03:39:07,468 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 03:39:07,469 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 03:39:07,469 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 03:39:07,470 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 03:39:07,470 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 03:39:07,471 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 03:39:07,472 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 03:39:07,473 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 03:39:07,473 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 03:39:07,475 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 03:39:07,476 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 03:39:07,478 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 03:39:07,479 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 03:39:07,480 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 03:39:07,482 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 03:39:07,483 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 03:39:07,483 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 03:39:07,484 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 03:39:07,484 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 03:39:07,486 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 03:39:07,486 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 03:39:07,487 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 03:39:07,487 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 03:39:07,488 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 03:39:07,488 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 03:39:07,488 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 03:39:07,490 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 03:39:07,490 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 03:39:07,491 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 03:39:07,503 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 03:39:07,503 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 03:39:07,504 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 03:39:07,504 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 03:39:07,505 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 03:39:07,505 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 03:39:07,505 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 03:39:07,505 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 03:39:07,505 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 03:39:07,506 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 03:39:07,506 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 03:39:07,506 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 03:39:07,506 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 03:39:07,506 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 03:39:07,506 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 03:39:07,506 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 03:39:07,507 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 03:39:07,507 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 03:39:07,507 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 03:39:07,507 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 03:39:07,507 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 03:39:07,507 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 03:39:07,508 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 03:39:07,508 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 03:39:07,508 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 03:39:07,508 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 03:39:07,508 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 03:39:07,508 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 03:39:07,508 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 03:39:07,508 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_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/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 [2018-11-10 03:39:07,541 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 03:39:07,552 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 03:39:07,556 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 03:39:07,557 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 03:39:07,557 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 03:39:07,558 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_false-unreach-call_true-termination.c [2018-11-10 03:39:07,603 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/bin-2019/uautomizer/data/37333a33d/4350c644da114a77990388f2d7c70db6/FLAG1034be9ae [2018-11-10 03:39:07,956 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 03:39:07,956 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/sv-benchmarks/c/recursive-simple/fibo_2calls_4_false-unreach-call_true-termination.c [2018-11-10 03:39:07,961 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/bin-2019/uautomizer/data/37333a33d/4350c644da114a77990388f2d7c70db6/FLAG1034be9ae [2018-11-10 03:39:07,971 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/bin-2019/uautomizer/data/37333a33d/4350c644da114a77990388f2d7c70db6 [2018-11-10 03:39:07,974 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 03:39:07,975 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 03:39:07,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 03:39:07,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 03:39:07,980 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 03:39:07,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 03:39:07" (1/1) ... [2018-11-10 03:39:07,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b132657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:39:07, skipping insertion in model container [2018-11-10 03:39:07,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 03:39:07" (1/1) ... [2018-11-10 03:39:07,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 03:39:08,005 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 03:39:08,123 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 03:39:08,126 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 03:39:08,138 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 03:39:08,147 INFO L193 MainTranslator]: Completed translation [2018-11-10 03:39:08,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:39:08 WrapperNode [2018-11-10 03:39:08,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 03:39:08,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 03:39:08,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 03:39:08,148 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 03:39:08,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:39:08" (1/1) ... [2018-11-10 03:39:08,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:39:08" (1/1) ... [2018-11-10 03:39:08,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:39:08" (1/1) ... [2018-11-10 03:39:08,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:39:08" (1/1) ... [2018-11-10 03:39:08,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:39:08" (1/1) ... [2018-11-10 03:39:08,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:39:08" (1/1) ... [2018-11-10 03:39:08,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:39:08" (1/1) ... [2018-11-10 03:39:08,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 03:39:08,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 03:39:08,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 03:39:08,169 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 03:39:08,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:39:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/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 [2018-11-10 03:39:08,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 03:39:08,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 03:39:08,259 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-10 03:39:08,259 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-10 03:39:08,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 03:39:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-10 03:39:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 03:39:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-10 03:39:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-10 03:39:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 03:39:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 03:39:08,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 03:39:08,395 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 03:39:08,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 03:39:08 BoogieIcfgContainer [2018-11-10 03:39:08,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 03:39:08,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 03:39:08,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 03:39:08,399 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 03:39:08,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 03:39:07" (1/3) ... [2018-11-10 03:39:08,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c25988c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 03:39:08, skipping insertion in model container [2018-11-10 03:39:08,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:39:08" (2/3) ... [2018-11-10 03:39:08,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c25988c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 03:39:08, skipping insertion in model container [2018-11-10 03:39:08,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 03:39:08" (3/3) ... [2018-11-10 03:39:08,402 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4_false-unreach-call_true-termination.c [2018-11-10 03:39:08,409 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 03:39:08,416 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 03:39:08,430 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 03:39:08,463 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 03:39:08,463 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 03:39:08,463 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 03:39:08,464 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 03:39:08,464 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 03:39:08,464 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 03:39:08,464 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 03:39:08,464 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 03:39:08,464 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 03:39:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-10 03:39:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 03:39:08,489 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:39:08,490 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:39:08,492 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:39:08,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:39:08,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-10 03:39:08,500 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:39:08,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:39:08,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:08,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:39:08,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:39:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:39:08,668 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 03:39:08,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 03:39:08,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 03:39:08,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 03:39:08,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 03:39:08,684 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-10 03:39:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:39:08,782 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-10 03:39:08,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 03:39:08,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 03:39:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:39:08,792 INFO L225 Difference]: With dead ends: 44 [2018-11-10 03:39:08,792 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 03:39:08,795 INFO L605 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 [2018-11-10 03:39:08,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 03:39:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-10 03:39:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 03:39:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-10 03:39:08,828 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-10 03:39:08,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:39:08,828 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-10 03:39:08,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 03:39:08,829 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-10 03:39:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-10 03:39:08,830 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:39:08,830 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 03:39:08,830 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:39:08,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:39:08,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-10 03:39:08,831 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:39:08,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:39:08,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:08,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:39:08,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:39:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 03:39:08,885 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 03:39:08,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 03:39:08,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 03:39:08,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 03:39:08,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 03:39:08,887 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-10 03:39:08,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:39:08,974 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-10 03:39:08,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 03:39:08,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-10 03:39:08,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:39:08,975 INFO L225 Difference]: With dead ends: 36 [2018-11-10 03:39:08,976 INFO L226 Difference]: Without dead ends: 32 [2018-11-10 03:39:08,977 INFO L605 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 [2018-11-10 03:39:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-10 03:39:08,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-10 03:39:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 03:39:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-10 03:39:08,983 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-10 03:39:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:39:08,984 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-10 03:39:08,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 03:39:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-10 03:39:08,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-10 03:39:08,985 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:39:08,985 INFO L375 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] [2018-11-10 03:39:08,986 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:39:08,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:39:08,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-10 03:39:08,986 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:39:08,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:39:08,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:08,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:39:08,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:39:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:39:09,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:39:09,076 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/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 [2018-11-10 03:39:09,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:39:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:39:09,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:39:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:39:09,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:39:09,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-10 03:39:09,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 03:39:09,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 03:39:09,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-10 03:39:09,215 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-11-10 03:39:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:39:09,379 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-11-10 03:39:09,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 03:39:09,380 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-11-10 03:39:09,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:39:09,381 INFO L225 Difference]: With dead ends: 58 [2018-11-10 03:39:09,381 INFO L226 Difference]: Without dead ends: 34 [2018-11-10 03:39:09,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-10 03:39:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-10 03:39:09,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-10 03:39:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-10 03:39:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-10 03:39:09,389 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-11-10 03:39:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:39:09,390 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-10 03:39:09,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 03:39:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-10 03:39:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 03:39:09,391 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:39:09,392 INFO L375 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] [2018-11-10 03:39:09,392 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:39:09,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:39:09,392 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-10 03:39:09,392 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:39:09,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:39:09,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:09,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:39:09,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:39:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:39:09,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:39:09,449 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/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 [2018-11-10 03:39:09,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:39:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:39:09,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:39:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 03:39:09,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:39:09,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-10 03:39:09,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 03:39:09,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 03:39:09,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-10 03:39:09,524 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-11-10 03:39:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:39:09,611 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-11-10 03:39:09,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 03:39:09,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-10 03:39:09,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:39:09,614 INFO L225 Difference]: With dead ends: 43 [2018-11-10 03:39:09,614 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 03:39:09,614 INFO L605 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 [2018-11-10 03:39:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 03:39:09,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-10 03:39:09,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-10 03:39:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-11-10 03:39:09,622 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-11-10 03:39:09,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:39:09,622 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-11-10 03:39:09,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 03:39:09,623 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-11-10 03:39:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-10 03:39:09,624 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:39:09,624 INFO L375 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] [2018-11-10 03:39:09,625 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:39:09,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:39:09,625 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-10 03:39:09,625 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:39:09,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:39:09,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:09,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:39:09,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:39:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 03:39:09,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:39:09,708 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/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 [2018-11-10 03:39:09,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:39:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:39:09,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:39:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 03:39:09,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:39:09,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-11-10 03:39:09,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 03:39:09,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 03:39:09,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-10 03:39:09,816 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-11-10 03:39:09,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:39:09,996 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-11-10 03:39:09,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 03:39:09,996 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-11-10 03:39:09,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:39:09,997 INFO L225 Difference]: With dead ends: 70 [2018-11-10 03:39:09,997 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 03:39:09,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-11-10 03:39:09,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 03:39:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-10 03:39:10,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 03:39:10,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-11-10 03:39:10,006 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-11-10 03:39:10,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:39:10,007 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-11-10 03:39:10,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 03:39:10,007 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-11-10 03:39:10,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-10 03:39:10,008 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:39:10,009 INFO L375 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] [2018-11-10 03:39:10,009 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:39:10,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:39:10,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-11-10 03:39:10,009 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:39:10,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:39:10,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:10,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:39:10,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:39:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 03:39:10,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:39:10,079 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/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 [2018-11-10 03:39:10,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:39:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:39:10,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:39:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 03:39:10,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:39:10,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-11-10 03:39:10,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 03:39:10,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 03:39:10,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-10 03:39:10,153 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-11-10 03:39:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:39:10,270 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-11-10 03:39:10,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 03:39:10,271 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-11-10 03:39:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:39:10,272 INFO L225 Difference]: With dead ends: 61 [2018-11-10 03:39:10,273 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 03:39:10,273 INFO L605 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 [2018-11-10 03:39:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 03:39:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-11-10 03:39:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-10 03:39:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-11-10 03:39:10,285 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-11-10 03:39:10,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:39:10,285 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-11-10 03:39:10,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 03:39:10,286 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-11-10 03:39:10,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-10 03:39:10,287 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:39:10,288 INFO L375 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] [2018-11-10 03:39:10,288 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:39:10,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:39:10,288 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-11-10 03:39:10,288 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:39:10,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:39:10,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:10,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:39:10,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:39:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-10 03:39:10,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 03:39:10,351 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/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 [2018-11-10 03:39:10,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:39:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 03:39:10,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 03:39:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 03:39:10,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 03:39:10,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2018-11-10 03:39:10,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 03:39:10,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 03:39:10,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-10 03:39:10,435 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 9 states. [2018-11-10 03:39:10,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 03:39:10,541 INFO L93 Difference]: Finished difference Result 66 states and 104 transitions. [2018-11-10 03:39:10,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 03:39:10,541 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2018-11-10 03:39:10,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 03:39:10,542 INFO L225 Difference]: With dead ends: 66 [2018-11-10 03:39:10,542 INFO L226 Difference]: Without dead ends: 62 [2018-11-10 03:39:10,543 INFO L605 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 [2018-11-10 03:39:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-10 03:39:10,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2018-11-10 03:39:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-10 03:39:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2018-11-10 03:39:10,551 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 54 [2018-11-10 03:39:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 03:39:10,552 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2018-11-10 03:39:10,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 03:39:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2018-11-10 03:39:10,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-10 03:39:10,554 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 03:39:10,554 INFO L375 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] [2018-11-10 03:39:10,555 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 03:39:10,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 03:39:10,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2018-11-10 03:39:10,555 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 03:39:10,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 03:39:10,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:10,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 03:39:10,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 03:39:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 03:39:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 03:39:10,598 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 03:39:10,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 03:39:10 BoogieIcfgContainer [2018-11-10 03:39:10,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 03:39:10,626 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 03:39:10,626 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 03:39:10,626 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 03:39:10,627 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 03:39:08" (3/4) ... [2018-11-10 03:39:10,629 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 03:39:10,671 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_dbe4a325-8e24-42a9-b7f2-60a18d07a24c/bin-2019/uautomizer/witness.graphml [2018-11-10 03:39:10,671 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 03:39:10,672 INFO L168 Benchmark]: Toolchain (without parser) took 2697.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 963.4 MB in the beginning and 1.1 GB in the end (delta: -150.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 03:39:10,673 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 03:39:10,673 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.96 ms. Allocated memory is still 1.0 GB. Free memory was 963.4 MB in the beginning and 951.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-10 03:39:10,674 INFO L168 Benchmark]: Boogie Preprocessor took 19.87 ms. Allocated memory is still 1.0 GB. Free memory is still 951.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 03:39:10,674 INFO L168 Benchmark]: RCFGBuilder took 227.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 951.6 MB in the beginning and 1.1 GB in the end (delta: -173.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 11.5 GB. [2018-11-10 03:39:10,674 INFO L168 Benchmark]: TraceAbstraction took 2229.58 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-10 03:39:10,675 INFO L168 Benchmark]: Witness Printer took 44.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. [2018-11-10 03:39:10,680 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 171.96 ms. Allocated memory is still 1.0 GB. Free memory was 963.4 MB in the beginning and 951.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.87 ms. Allocated memory is still 1.0 GB. Free memory is still 951.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 227.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 951.6 MB in the beginning and 1.1 GB in the end (delta: -173.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2229.58 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Witness Printer took 44.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. 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] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L13] 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] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L13] EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] RET return fibo2(n-1) + fibo2(n-2); [L23] 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] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L23] EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] RET return fibo1(n-1) + fibo1(n-2); [L13] 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] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L23] 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] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L23] EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] RET return fibo1(n-1) + fibo1(n-2); [L13] EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] RET return fibo2(n-1) + fibo2(n-2); [L37] 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, 2.1s OverallTime, 8 OverallIterations, 5 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 169 SDtfs, 132 SDslu, 656 SDs, 0 SdLazy, 584 SolverSat, 58 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 258 GetRequests, 191 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=7, 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, 7 MinimizatonAttempts, 35 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 467 NumberOfCodeBlocks, 467 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 387 ConstructedInterpolants, 0 QuantifiedInterpolants, 24863 SizeOfPredicates, 18 NumberOfNonLiveVariables, 424 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 116/170 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...