./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5_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_ed861efc-2ee8-4d68-9b5b-63912a1c483d/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/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 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2018-10-26 20:15:50,234 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 20:15:50,236 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 20:15:50,245 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 20:15:50,246 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 20:15:50,247 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 20:15:50,248 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 20:15:50,249 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 20:15:50,250 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 20:15:50,250 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 20:15:50,251 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 20:15:50,251 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 20:15:50,252 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 20:15:50,252 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 20:15:50,257 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 20:15:50,262 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 20:15:50,263 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 20:15:50,264 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 20:15:50,267 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 20:15:50,268 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 20:15:50,269 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 20:15:50,269 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 20:15:50,271 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 20:15:50,271 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 20:15:50,271 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 20:15:50,271 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 20:15:50,272 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 20:15:50,272 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 20:15:50,273 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 20:15:50,274 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 20:15:50,274 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 20:15:50,274 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 20:15:50,274 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 20:15:50,275 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 20:15:50,275 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 20:15:50,276 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 20:15:50,276 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-26 20:15:50,286 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 20:15:50,287 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 20:15:50,288 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 20:15:50,288 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 20:15:50,288 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 20:15:50,288 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 20:15:50,289 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 20:15:50,289 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 20:15:50,289 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 20:15:50,289 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 20:15:50,289 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 20:15:50,289 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 20:15:50,289 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 20:15:50,289 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 20:15:50,290 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 20:15:50,290 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 20:15:50,290 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 20:15:50,290 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 20:15:50,290 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 20:15:50,290 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 20:15:50,290 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 20:15:50,291 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 20:15:50,291 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 20:15:50,291 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 20:15:50,291 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 20:15:50,291 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 20:15:50,291 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 20:15:50,291 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 20:15:50,291 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 20:15:50,291 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_ed861efc-2ee8-4d68-9b5b-63912a1c483d/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 -> 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 [2018-10-26 20:15:50,334 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 20:15:50,346 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 20:15:50,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 20:15:50,351 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 20:15:50,352 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 20:15:50,352 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c [2018-10-26 20:15:50,399 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/bin-2019/uautomizer/data/75ebdef61/5652c56bc62d465ca732ed23df79cd29/FLAG6776a05d1 [2018-10-26 20:15:50,775 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 20:15:50,776 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c [2018-10-26 20:15:50,784 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/bin-2019/uautomizer/data/75ebdef61/5652c56bc62d465ca732ed23df79cd29/FLAG6776a05d1 [2018-10-26 20:15:50,798 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/bin-2019/uautomizer/data/75ebdef61/5652c56bc62d465ca732ed23df79cd29 [2018-10-26 20:15:50,802 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 20:15:50,804 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 20:15:50,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 20:15:50,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 20:15:50,810 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 20:15:50,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:15:50" (1/1) ... [2018-10-26 20:15:50,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1511b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:15:50, skipping insertion in model container [2018-10-26 20:15:50,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:15:50" (1/1) ... [2018-10-26 20:15:50,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 20:15:50,839 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 20:15:50,963 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:15:50,965 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 20:15:50,976 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:15:50,987 INFO L193 MainTranslator]: Completed translation [2018-10-26 20:15:50,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:15:50 WrapperNode [2018-10-26 20:15:50,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 20:15:50,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 20:15:50,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 20:15:50,988 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 20:15:51,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:15:50" (1/1) ... [2018-10-26 20:15:51,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:15:50" (1/1) ... [2018-10-26 20:15:51,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:15:50" (1/1) ... [2018-10-26 20:15:51,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:15:50" (1/1) ... [2018-10-26 20:15:51,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:15:50" (1/1) ... [2018-10-26 20:15:51,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:15:50" (1/1) ... [2018-10-26 20:15:51,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:15:50" (1/1) ... [2018-10-26 20:15:51,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 20:15:51,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 20:15:51,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 20:15:51,012 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 20:15:51,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:15:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/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 [2018-10-26 20:15:51,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 20:15:51,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 20:15:51,061 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-10-26 20:15:51,061 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 20:15:51,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-10-26 20:15:51,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-10-26 20:15:51,062 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-10-26 20:15:51,062 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 20:15:51,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 20:15:51,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 20:15:51,384 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 20:15:51,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:15:51 BoogieIcfgContainer [2018-10-26 20:15:51,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 20:15:51,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 20:15:51,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 20:15:51,387 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 20:15:51,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:15:50" (1/3) ... [2018-10-26 20:15:51,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d777261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:15:51, skipping insertion in model container [2018-10-26 20:15:51,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:15:50" (2/3) ... [2018-10-26 20:15:51,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d777261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:15:51, skipping insertion in model container [2018-10-26 20:15:51,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:15:51" (3/3) ... [2018-10-26 20:15:51,402 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_5_false-unreach-call_true-termination.c [2018-10-26 20:15:51,410 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 20:15:51,438 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 20:15:51,451 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 20:15:51,475 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 20:15:51,476 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 20:15:51,476 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 20:15:51,476 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 20:15:51,476 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 20:15:51,476 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 20:15:51,477 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 20:15:51,477 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 20:15:51,477 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 20:15:51,491 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-10-26 20:15:51,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 20:15:51,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:15:51,497 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:15:51,498 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:15:51,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:15:51,503 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-10-26 20:15:51,504 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:15:51,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:15:51,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:51,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:15:51,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:15:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:15:51,694 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:15:51,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 20:15:51,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 20:15:51,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 20:15:51,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 20:15:51,707 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-10-26 20:15:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:15:51,833 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-10-26 20:15:51,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 20:15:51,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-26 20:15:51,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:15:51,842 INFO L225 Difference]: With dead ends: 35 [2018-10-26 20:15:51,842 INFO L226 Difference]: Without dead ends: 21 [2018-10-26 20:15:51,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 20:15:51,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-26 20:15:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-26 20:15:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-26 20:15:51,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-10-26 20:15:51,889 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-10-26 20:15:51,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:15:51,889 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-10-26 20:15:51,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 20:15:51,889 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-10-26 20:15:51,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 20:15:51,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:15:51,890 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:15:51,891 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:15:51,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:15:51,891 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-10-26 20:15:51,891 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:15:51,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:15:51,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:51,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:15:51,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:15:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:15:51,936 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:15:51,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 20:15:51,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 20:15:51,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 20:15:51,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 20:15:51,938 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-10-26 20:15:52,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:15:52,063 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-10-26 20:15:52,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 20:15:52,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-10-26 20:15:52,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:15:52,064 INFO L225 Difference]: With dead ends: 27 [2018-10-26 20:15:52,064 INFO L226 Difference]: Without dead ends: 23 [2018-10-26 20:15:52,065 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 [2018-10-26 20:15:52,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-26 20:15:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-10-26 20:15:52,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-26 20:15:52,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-10-26 20:15:52,072 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-10-26 20:15:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:15:52,072 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-10-26 20:15:52,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 20:15:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-10-26 20:15:52,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-26 20:15:52,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:15:52,074 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:15:52,074 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:15:52,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:15:52,074 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-10-26 20:15:52,074 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:15:52,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:15:52,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:52,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:15:52,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:15:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-26 20:15:52,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:15:52,265 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/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 [2018-10-26 20:15:52,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:15:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:15:52,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:15:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-26 20:15:52,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:15:52,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-10-26 20:15:52,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 20:15:52,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 20:15:52,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-10-26 20:15:52,420 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-10-26 20:15:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:15:52,670 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-10-26 20:15:52,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 20:15:52,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-10-26 20:15:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:15:52,671 INFO L225 Difference]: With dead ends: 38 [2018-10-26 20:15:52,672 INFO L226 Difference]: Without dead ends: 23 [2018-10-26 20:15:52,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-10-26 20:15:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-26 20:15:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-26 20:15:52,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-26 20:15:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-10-26 20:15:52,676 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-10-26 20:15:52,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:15:52,677 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-10-26 20:15:52,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 20:15:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-10-26 20:15:52,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-26 20:15:52,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:15:52,678 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:15:52,678 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:15:52,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:15:52,678 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-10-26 20:15:52,678 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:15:52,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:15:52,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:52,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:15:52,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:15:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 20:15:52,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:15:52,738 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/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 [2018-10-26 20:15:52,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:15:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:15:52,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:15:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 20:15:52,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:15:52,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-26 20:15:52,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 20:15:52,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 20:15:52,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-26 20:15:52,817 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-10-26 20:15:53,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:15:53,076 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-10-26 20:15:53,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 20:15:53,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-10-26 20:15:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:15:53,078 INFO L225 Difference]: With dead ends: 32 [2018-10-26 20:15:53,078 INFO L226 Difference]: Without dead ends: 28 [2018-10-26 20:15:53,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-26 20:15:53,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-26 20:15:53,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-26 20:15:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-26 20:15:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-10-26 20:15:53,085 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-10-26 20:15:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:15:53,085 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-10-26 20:15:53,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 20:15:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-10-26 20:15:53,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-26 20:15:53,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:15:53,086 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:15:53,087 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:15:53,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:15:53,087 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-10-26 20:15:53,087 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:15:53,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:15:53,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:53,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:15:53,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:15:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-26 20:15:53,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:15:53,227 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/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 [2018-10-26 20:15:53,235 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 20:15:53,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 20:15:53,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:15:53,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:15:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-26 20:15:53,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:15:53,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-10-26 20:15:53,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 20:15:53,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 20:15:53,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-26 20:15:53,365 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-10-26 20:15:53,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:15:53,446 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-10-26 20:15:53,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 20:15:53,448 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-10-26 20:15:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:15:53,449 INFO L225 Difference]: With dead ends: 40 [2018-10-26 20:15:53,449 INFO L226 Difference]: Without dead ends: 36 [2018-10-26 20:15:53,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-10-26 20:15:53,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-26 20:15:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-10-26 20:15:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-26 20:15:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-10-26 20:15:53,458 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-10-26 20:15:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:15:53,459 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-10-26 20:15:53,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 20:15:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-10-26 20:15:53,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-26 20:15:53,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:15:53,462 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:15:53,463 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:15:53,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:15:53,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-10-26 20:15:53,463 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:15:53,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:15:53,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:53,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:15:53,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:15:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-10-26 20:15:53,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:15:53,677 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/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 [2018-10-26 20:15:53,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 20:15:53,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-26 20:15:53,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:15:53,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:15:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-10-26 20:15:53,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:15:53,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-10-26 20:15:53,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 20:15:53,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 20:15:53,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-10-26 20:15:53,801 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-10-26 20:15:54,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:15:54,107 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-10-26 20:15:54,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 20:15:54,109 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-10-26 20:15:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:15:54,111 INFO L225 Difference]: With dead ends: 76 [2018-10-26 20:15:54,111 INFO L226 Difference]: Without dead ends: 49 [2018-10-26 20:15:54,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-10-26 20:15:54,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-26 20:15:54,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-10-26 20:15:54,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-26 20:15:54,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-10-26 20:15:54,123 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-10-26 20:15:54,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:15:54,123 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-10-26 20:15:54,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 20:15:54,123 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-10-26 20:15:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-26 20:15:54,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:15:54,133 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:15:54,133 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:15:54,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:15:54,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2018-10-26 20:15:54,134 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:15:54,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:15:54,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:54,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:15:54,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:15:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 69 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2018-10-26 20:15:54,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:15:54,382 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/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 [2018-10-26 20:15:54,389 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 20:15:54,416 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 20:15:54,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:15:54,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:15:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-10-26 20:15:54,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:15:54,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2018-10-26 20:15:54,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-26 20:15:54,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-26 20:15:54,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2018-10-26 20:15:54,544 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 19 states. [2018-10-26 20:15:55,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:15:55,406 INFO L93 Difference]: Finished difference Result 75 states and 150 transitions. [2018-10-26 20:15:55,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-26 20:15:55,407 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2018-10-26 20:15:55,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:15:55,409 INFO L225 Difference]: With dead ends: 75 [2018-10-26 20:15:55,409 INFO L226 Difference]: Without dead ends: 71 [2018-10-26 20:15:55,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=336, Invalid=1304, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 20:15:55,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-26 20:15:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2018-10-26 20:15:55,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-26 20:15:55,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2018-10-26 20:15:55,425 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 82 [2018-10-26 20:15:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:15:55,425 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2018-10-26 20:15:55,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-26 20:15:55,426 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2018-10-26 20:15:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-26 20:15:55,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:15:55,428 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 19, 11, 11, 11, 11, 11, 11, 11, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:15:55,428 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:15:55,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:15:55,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1548772748, now seen corresponding path program 5 times [2018-10-26 20:15:55,429 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:15:55,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:15:55,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:55,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:15:55,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:15:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1403 backedges. 294 proven. 145 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2018-10-26 20:15:55,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:15:55,594 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/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 [2018-10-26 20:15:55,602 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 20:15:55,773 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-26 20:15:55,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:15:55,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:15:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1403 backedges. 822 proven. 67 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2018-10-26 20:15:55,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:15:55,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2018-10-26 20:15:55,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 20:15:55,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 20:15:55,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2018-10-26 20:15:55,898 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand 16 states. [2018-10-26 20:15:56,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:15:56,494 INFO L93 Difference]: Finished difference Result 131 states and 277 transitions. [2018-10-26 20:15:56,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 20:15:56,495 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 164 [2018-10-26 20:15:56,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:15:56,496 INFO L225 Difference]: With dead ends: 131 [2018-10-26 20:15:56,496 INFO L226 Difference]: Without dead ends: 66 [2018-10-26 20:15:56,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2018-10-26 20:15:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-26 20:15:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2018-10-26 20:15:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-26 20:15:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2018-10-26 20:15:56,514 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 164 [2018-10-26 20:15:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:15:56,514 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2018-10-26 20:15:56,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 20:15:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2018-10-26 20:15:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-26 20:15:56,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:15:56,516 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:15:56,516 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:15:56,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:15:56,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 6 times [2018-10-26 20:15:56,516 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:15:56,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:15:56,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:56,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:15:56,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:15:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 20:15:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 20:15:56,558 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 20:15:56,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 08:15:56 BoogieIcfgContainer [2018-10-26 20:15:56,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 20:15:56,592 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 20:15:56,592 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 20:15:56,592 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 20:15:56,592 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:15:51" (3/4) ... [2018-10-26 20:15:56,595 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-26 20:15:56,657 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_ed861efc-2ee8-4d68-9b5b-63912a1c483d/bin-2019/uautomizer/witness.graphml [2018-10-26 20:15:56,658 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 20:15:56,658 INFO L168 Benchmark]: Toolchain (without parser) took 5854.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 181.9 MB). Free memory was 953.1 MB in the beginning and 891.1 MB in the end (delta: 62.0 MB). Peak memory consumption was 243.9 MB. Max. memory is 11.5 GB. [2018-10-26 20:15:56,659 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:15:56,660 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.94 ms. Allocated memory is still 1.0 GB. Free memory was 953.1 MB in the beginning and 942.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-10-26 20:15:56,660 INFO L168 Benchmark]: Boogie Preprocessor took 23.03 ms. Allocated memory is still 1.0 GB. Free memory is still 942.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:15:56,660 INFO L168 Benchmark]: RCFGBuilder took 372.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 942.2 MB in the beginning and 1.1 GB in the end (delta: -152.2 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. [2018-10-26 20:15:56,662 INFO L168 Benchmark]: TraceAbstraction took 5206.65 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 73.9 MB). Free memory was 1.1 GB in the beginning and 896.6 MB in the end (delta: 197.8 MB). Peak memory consumption was 271.8 MB. Max. memory is 11.5 GB. [2018-10-26 20:15:56,662 INFO L168 Benchmark]: Witness Printer took 66.13 ms. Allocated memory is still 1.2 GB. Free memory was 896.6 MB in the beginning and 891.1 MB in the end (delta: 5.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 11.5 GB. [2018-10-26 20:15:56,664 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 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 182.94 ms. Allocated memory is still 1.0 GB. Free memory was 953.1 MB in the beginning and 942.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.03 ms. Allocated memory is still 1.0 GB. Free memory is still 942.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 372.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 942.2 MB in the beginning and 1.1 GB in the end (delta: -152.2 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5206.65 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 73.9 MB). Free memory was 1.1 GB in the beginning and 896.6 MB in the end (delta: 197.8 MB). Peak memory consumption was 271.8 MB. Max. memory is 11.5 GB. * Witness Printer took 66.13 ms. Allocated memory is still 1.2 GB. Free memory was 896.6 MB in the beginning and 891.1 MB in the end (delta: 5.5 MB). Peak memory consumption was 5.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int x = 5; VAL [x=5] [L25] CALL, EXPR fibo(x) VAL [\old(n)=5] [L6] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L8] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L6] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L8] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L11] EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L11] EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] RET return fibo(n-1) + fibo(n-2); [L11] EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L11] EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] RET return fibo(n-1) + fibo(n-2); [L11] EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L11] EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L11] EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] RET return fibo(n-1) + fibo(n-2); [L11] EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L11] RET return fibo(n-1) + fibo(n-2); [L11] EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L11] EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L11] EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] RET return fibo(n-1) + fibo(n-2); [L11] EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L11] EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] RET return fibo(n-1) + fibo(n-2); [L11] EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L11] RET return fibo(n-1) + fibo(n-2); [L25] EXPR fibo(x) VAL [fibo(x)=5, x=5] [L25] int result = fibo(x); [L26] COND TRUE result == 5 VAL [result=5, x=5] [L27] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. UNSAFE Result, 5.1s OverallTime, 9 OverallIterations, 23 TraceHistogramMax, 2.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 153 SDtfs, 198 SDslu, 533 SDs, 0 SdLazy, 1121 SolverSat, 290 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 570 GetRequests, 449 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred 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, 37 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 1006 NumberOfCodeBlocks, 896 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 883 ConstructedInterpolants, 0 QuantifiedInterpolants, 140121 SizeOfPredicates, 24 NumberOfNonLiveVariables, 724 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 3893/4396 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...