./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 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/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_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/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 0.1.23-5842f4b [2018-11-18 09:21:09,476 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 09:21:09,477 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 09:21:09,486 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 09:21:09,486 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 09:21:09,487 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 09:21:09,488 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 09:21:09,489 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 09:21:09,491 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 09:21:09,491 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 09:21:09,492 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 09:21:09,492 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 09:21:09,493 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 09:21:09,494 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 09:21:09,495 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 09:21:09,495 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 09:21:09,496 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 09:21:09,497 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 09:21:09,499 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 09:21:09,500 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 09:21:09,501 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 09:21:09,502 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 09:21:09,504 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 09:21:09,504 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 09:21:09,504 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 09:21:09,505 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 09:21:09,506 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 09:21:09,506 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 09:21:09,507 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 09:21:09,508 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 09:21:09,508 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 09:21:09,509 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 09:21:09,509 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 09:21:09,509 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 09:21:09,510 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 09:21:09,510 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 09:21:09,511 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-18 09:21:09,521 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 09:21:09,521 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 09:21:09,522 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 09:21:09,522 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 09:21:09,522 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 09:21:09,523 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 09:21:09,523 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 09:21:09,523 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 09:21:09,523 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 09:21:09,523 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 09:21:09,523 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 09:21:09,524 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 09:21:09,524 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 09:21:09,524 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 09:21:09,524 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 09:21:09,524 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 09:21:09,524 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 09:21:09,524 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 09:21:09,525 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 09:21:09,525 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 09:21:09,525 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 09:21:09,525 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 09:21:09,525 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 09:21:09,525 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 09:21:09,525 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 09:21:09,526 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 09:21:09,526 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 09:21:09,526 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 09:21:09,526 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 09:21:09,526 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 09:21:09,526 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_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/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 [2018-11-18 09:21:09,550 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 09:21:09,560 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 09:21:09,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 09:21:09,564 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 09:21:09,564 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 09:21:09,565 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c [2018-11-18 09:21:09,612 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/bin-2019/uautomizer/data/44c2e83cb/24bc7bea5fe141ad9a8d1b56127bc370/FLAG565187c4e [2018-11-18 09:21:09,945 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 09:21:09,945 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c [2018-11-18 09:21:09,950 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/bin-2019/uautomizer/data/44c2e83cb/24bc7bea5fe141ad9a8d1b56127bc370/FLAG565187c4e [2018-11-18 09:21:09,961 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/bin-2019/uautomizer/data/44c2e83cb/24bc7bea5fe141ad9a8d1b56127bc370 [2018-11-18 09:21:09,964 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 09:21:09,965 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 09:21:09,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 09:21:09,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 09:21:09,969 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 09:21:09,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:21:09" (1/1) ... [2018-11-18 09:21:09,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f35898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:21:09, skipping insertion in model container [2018-11-18 09:21:09,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:21:09" (1/1) ... [2018-11-18 09:21:09,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 09:21:09,989 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 09:21:10,095 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:21:10,097 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 09:21:10,106 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:21:10,114 INFO L195 MainTranslator]: Completed translation [2018-11-18 09:21:10,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:21:10 WrapperNode [2018-11-18 09:21:10,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 09:21:10,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 09:21:10,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 09:21:10,115 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 09:21:10,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:21:10" (1/1) ... [2018-11-18 09:21:10,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:21:10" (1/1) ... [2018-11-18 09:21:10,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:21:10" (1/1) ... [2018-11-18 09:21:10,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:21:10" (1/1) ... [2018-11-18 09:21:10,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:21:10" (1/1) ... [2018-11-18 09:21:10,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:21:10" (1/1) ... [2018-11-18 09:21:10,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:21:10" (1/1) ... [2018-11-18 09:21:10,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 09:21:10,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 09:21:10,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 09:21:10,138 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 09:21:10,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:21:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/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 [2018-11-18 09:21:10,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 09:21:10,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 09:21:10,216 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-18 09:21:10,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 09:21:10,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 09:21:10,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 09:21:10,216 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-18 09:21:10,216 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 09:21:10,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 09:21:10,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 09:21:10,337 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 09:21:10,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:21:10 BoogieIcfgContainer [2018-11-18 09:21:10,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 09:21:10,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 09:21:10,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 09:21:10,341 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 09:21:10,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:21:09" (1/3) ... [2018-11-18 09:21:10,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc54b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:21:10, skipping insertion in model container [2018-11-18 09:21:10,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:21:10" (2/3) ... [2018-11-18 09:21:10,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc54b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:21:10, skipping insertion in model container [2018-11-18 09:21:10,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:21:10" (3/3) ... [2018-11-18 09:21:10,343 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_5_false-unreach-call_true-termination.c [2018-11-18 09:21:10,350 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 09:21:10,355 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 09:21:10,366 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 09:21:10,396 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 09:21:10,397 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 09:21:10,397 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 09:21:10,397 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 09:21:10,397 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 09:21:10,397 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 09:21:10,397 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 09:21:10,397 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 09:21:10,397 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 09:21:10,414 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-18 09:21:10,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 09:21:10,420 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:21:10,421 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:21:10,423 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:21:10,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:21:10,428 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-11-18 09:21:10,430 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:21:10,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:21:10,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:10,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:21:10,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:21:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:21:10,601 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:21:10,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 09:21:10,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:21:10,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:21:10,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 09:21:10,622 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-18 09:21:10,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:21:10,703 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-18 09:21:10,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:21:10,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 09:21:10,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:21:10,711 INFO L225 Difference]: With dead ends: 35 [2018-11-18 09:21:10,711 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 09:21:10,714 INFO L604 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 [2018-11-18 09:21:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 09:21:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 09:21:10,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 09:21:10,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-18 09:21:10,747 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-18 09:21:10,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:21:10,747 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-18 09:21:10,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:21:10,748 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-18 09:21:10,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 09:21:10,749 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:21:10,749 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:21:10,749 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:21:10,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:21:10,749 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-11-18 09:21:10,750 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:21:10,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:21:10,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:10,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:21:10,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:21:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:21:10,794 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:21:10,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 09:21:10,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:21:10,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:21:10,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 09:21:10,796 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-18 09:21:10,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:21:10,863 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-18 09:21:10,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:21:10,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-18 09:21:10,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:21:10,865 INFO L225 Difference]: With dead ends: 27 [2018-11-18 09:21:10,865 INFO L226 Difference]: Without dead ends: 23 [2018-11-18 09:21:10,866 INFO L604 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 [2018-11-18 09:21:10,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-18 09:21:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-18 09:21:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 09:21:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-18 09:21:10,872 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-18 09:21:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:21:10,872 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-18 09:21:10,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:21:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-18 09:21:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 09:21:10,873 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:21:10,873 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] [2018-11-18 09:21:10,874 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:21:10,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:21:10,874 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-11-18 09:21:10,874 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:21:10,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:21:10,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:10,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:21:10,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:21:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 09:21:10,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:21:10,953 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/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 [2018-11-18 09:21:10,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:21:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:21:10,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:21:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 09:21:11,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:21:11,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-18 09:21:11,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 09:21:11,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 09:21:11,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-18 09:21:11,051 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-18 09:21:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:21:11,179 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-18 09:21:11,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 09:21:11,179 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-18 09:21:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:21:11,180 INFO L225 Difference]: With dead ends: 38 [2018-11-18 09:21:11,180 INFO L226 Difference]: Without dead ends: 23 [2018-11-18 09:21:11,181 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-18 09:21:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-18 09:21:11,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-18 09:21:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 09:21:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-18 09:21:11,186 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-18 09:21:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:21:11,186 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-18 09:21:11,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 09:21:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-18 09:21:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 09:21:11,188 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:21:11,188 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] [2018-11-18 09:21:11,188 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:21:11,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:21:11,188 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-11-18 09:21:11,188 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:21:11,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:21:11,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:11,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:21:11,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:21:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 09:21:11,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:21:11,256 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/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 [2018-11-18 09:21:11,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:21:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:21:11,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:21:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 09:21:11,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:21:11,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-18 09:21:11,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 09:21:11,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 09:21:11,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:21:11,294 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-18 09:21:11,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:21:11,339 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-18 09:21:11,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 09:21:11,339 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-18 09:21:11,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:21:11,340 INFO L225 Difference]: With dead ends: 32 [2018-11-18 09:21:11,340 INFO L226 Difference]: Without dead ends: 28 [2018-11-18 09:21:11,341 INFO L604 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 [2018-11-18 09:21:11,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-18 09:21:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-18 09:21:11,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 09:21:11,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-18 09:21:11,347 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-18 09:21:11,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:21:11,347 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-18 09:21:11,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 09:21:11,347 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-18 09:21:11,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-18 09:21:11,348 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:21:11,349 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] [2018-11-18 09:21:11,349 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:21:11,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:21:11,349 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-11-18 09:21:11,349 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:21:11,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:21:11,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:11,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:21:11,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:21:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 09:21:11,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:21:11,419 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/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 [2018-11-18 09:21:11,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 09:21:11,445 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 09:21:11,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:21:11,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:21:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-18 09:21:11,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:21:11,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-11-18 09:21:11,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 09:21:11,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 09:21:11,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-18 09:21:11,500 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-11-18 09:21:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:21:11,564 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-11-18 09:21:11,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 09:21:11,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-18 09:21:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:21:11,566 INFO L225 Difference]: With dead ends: 40 [2018-11-18 09:21:11,566 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 09:21:11,566 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-18 09:21:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 09:21:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-18 09:21:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 09:21:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-18 09:21:11,575 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-18 09:21:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:21:11,575 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-18 09:21:11,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 09:21:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-18 09:21:11,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-18 09:21:11,578 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:21:11,578 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] [2018-11-18 09:21:11,578 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:21:11,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:21:11,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-11-18 09:21:11,578 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:21:11,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:21:11,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:11,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:21:11,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:21:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-18 09:21:11,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:21:11,724 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/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 [2018-11-18 09:21:11,732 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 09:21:11,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-18 09:21:11,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:21:11,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:21:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-18 09:21:11,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:21:11,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-18 09:21:11,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 09:21:11,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 09:21:11,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-18 09:21:11,812 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-11-18 09:21:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:21:12,012 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-11-18 09:21:12,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 09:21:12,013 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-11-18 09:21:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:21:12,014 INFO L225 Difference]: With dead ends: 76 [2018-11-18 09:21:12,014 INFO L226 Difference]: Without dead ends: 49 [2018-11-18 09:21:12,015 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-18 09:21:12,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-18 09:21:12,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-11-18 09:21:12,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-18 09:21:12,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-11-18 09:21:12,025 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-11-18 09:21:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:21:12,025 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-11-18 09:21:12,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 09:21:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-11-18 09:21:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-18 09:21:12,027 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:21:12,027 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:21:12,027 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:21:12,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:21:12,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 4 times [2018-11-18 09:21:12,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:21:12,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:21:12,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:12,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:21:12,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:21:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-18 09:21:12,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:21:12,095 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/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 [2018-11-18 09:21:12,104 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 09:21:12,119 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 09:21:12,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:21:12,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:21:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-18 09:21:12,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:21:12,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2018-11-18 09:21:12,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 09:21:12,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 09:21:12,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-18 09:21:12,162 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 8 states. [2018-11-18 09:21:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:21:12,272 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2018-11-18 09:21:12,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 09:21:12,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2018-11-18 09:21:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:21:12,274 INFO L225 Difference]: With dead ends: 52 [2018-11-18 09:21:12,274 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 09:21:12,275 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-18 09:21:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 09:21:12,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-18 09:21:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 09:21:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2018-11-18 09:21:12,284 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 68 [2018-11-18 09:21:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:21:12,284 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2018-11-18 09:21:12,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 09:21:12,284 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2018-11-18 09:21:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-18 09:21:12,287 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:21:12,287 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:21:12,287 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:21:12,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:21:12,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2018-11-18 09:21:12,288 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:21:12,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:21:12,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:12,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:21:12,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:21:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 241 proven. 102 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2018-11-18 09:21:12,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:21:12,406 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/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 [2018-11-18 09:21:12,413 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 09:21:12,454 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-18 09:21:12,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 09:21:12,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:21:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 336 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2018-11-18 09:21:12,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 09:21:12,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2018-11-18 09:21:12,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 09:21:12,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 09:21:12,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2018-11-18 09:21:12,592 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand 18 states. [2018-11-18 09:21:12,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:21:12,973 INFO L93 Difference]: Finished difference Result 119 states and 232 transitions. [2018-11-18 09:21:12,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-18 09:21:12,973 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 136 [2018-11-18 09:21:12,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:21:12,974 INFO L225 Difference]: With dead ends: 119 [2018-11-18 09:21:12,974 INFO L226 Difference]: Without dead ends: 61 [2018-11-18 09:21:12,976 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=971, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 09:21:12,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-18 09:21:12,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-11-18 09:21:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-18 09:21:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2018-11-18 09:21:12,982 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 136 [2018-11-18 09:21:12,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:21:12,982 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2018-11-18 09:21:12,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 09:21:12,982 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2018-11-18 09:21:12,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-18 09:21:12,984 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:21:12,984 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] [2018-11-18 09:21:12,984 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:21:12,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:21:12,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 6 times [2018-11-18 09:21:12,984 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:21:12,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:21:12,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:12,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 09:21:12,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:21:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 09:21:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 09:21:13,025 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 09:21:13,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 09:21:13 BoogieIcfgContainer [2018-11-18 09:21:13,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 09:21:13,047 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 09:21:13,047 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 09:21:13,047 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 09:21:13,048 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:21:10" (3/4) ... [2018-11-18 09:21:13,050 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 09:21:13,091 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_dad2faf8-6d9c-43bb-8f5d-0d2457b3523d/bin-2019/uautomizer/witness.graphml [2018-11-18 09:21:13,091 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 09:21:13,092 INFO L168 Benchmark]: Toolchain (without parser) took 3127.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 959.1 MB in the beginning and 1.0 GB in the end (delta: -71.4 MB). Peak memory consumption was 109.5 MB. Max. memory is 11.5 GB. [2018-11-18 09:21:13,093 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:21:13,093 INFO L168 Benchmark]: CACSL2BoogieTranslator took 148.66 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 09:21:13,093 INFO L168 Benchmark]: Boogie Preprocessor took 22.05 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 09:21:13,094 INFO L168 Benchmark]: RCFGBuilder took 200.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 92.3 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -131.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2018-11-18 09:21:13,094 INFO L168 Benchmark]: TraceAbstraction took 2708.03 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 88.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 46.5 MB). Peak memory consumption was 135.2 MB. Max. memory is 11.5 GB. [2018-11-18 09:21:13,094 INFO L168 Benchmark]: Witness Printer took 44.42 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:21:13,096 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 148.66 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.05 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 200.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 92.3 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -131.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2708.03 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 88.6 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 46.5 MB). Peak memory consumption was 135.2 MB. Max. memory is 11.5 GB. * Witness Printer took 44.42 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. 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, 2.6s OverallTime, 9 OverallIterations, 19 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 153 SDtfs, 254 SDslu, 430 SDs, 0 SdLazy, 672 SolverSat, 322 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 496 GetRequests, 400 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred 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, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 922 NumberOfCodeBlocks, 842 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 799 ConstructedInterpolants, 0 QuantifiedInterpolants, 116667 SizeOfPredicates, 27 NumberOfNonLiveVariables, 699 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 2596/3242 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...