./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i --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_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/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 1b149b3cef099476d14a8b122afb66552d0406eb ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 05:54:58,023 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 05:54:58,025 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 05:54:58,031 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 05:54:58,031 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 05:54:58,032 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 05:54:58,033 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 05:54:58,035 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 05:54:58,036 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 05:54:58,037 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 05:54:58,038 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 05:54:58,038 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 05:54:58,038 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 05:54:58,039 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 05:54:58,040 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 05:54:58,041 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 05:54:58,041 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 05:54:58,043 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 05:54:58,044 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 05:54:58,045 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 05:54:58,046 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 05:54:58,047 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 05:54:58,049 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 05:54:58,049 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 05:54:58,049 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 05:54:58,050 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 05:54:58,051 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 05:54:58,051 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 05:54:58,052 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 05:54:58,053 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 05:54:58,053 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 05:54:58,053 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 05:54:58,054 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 05:54:58,054 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 05:54:58,055 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 05:54:58,055 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 05:54:58,055 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 05:54:58,066 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 05:54:58,066 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 05:54:58,067 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 05:54:58,067 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 05:54:58,067 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 05:54:58,067 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 05:54:58,068 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 05:54:58,068 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 05:54:58,068 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 05:54:58,068 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 05:54:58,068 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 05:54:58,068 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 05:54:58,068 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 05:54:58,069 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 05:54:58,069 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 05:54:58,069 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 05:54:58,069 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 05:54:58,069 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 05:54:58,069 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 05:54:58,069 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 05:54:58,070 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 05:54:58,070 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 05:54:58,070 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 05:54:58,070 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 05:54:58,070 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 05:54:58,070 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 05:54:58,070 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 05:54:58,070 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 05:54:58,071 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 05:54:58,071 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_fae03d79-cf27-4730-a080-e17c8f8f5a9a/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 -> 1b149b3cef099476d14a8b122afb66552d0406eb [2018-11-10 05:54:58,094 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 05:54:58,102 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 05:54:58,105 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 05:54:58,106 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 05:54:58,106 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 05:54:58,107 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/../../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-11-10 05:54:58,143 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/data/401fe53d7/58e15f8ecce8459e8f2904ff223cac72/FLAG90cc89bab [2018-11-10 05:54:58,440 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 05:54:58,440 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-11-10 05:54:58,445 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/data/401fe53d7/58e15f8ecce8459e8f2904ff223cac72/FLAG90cc89bab [2018-11-10 05:54:58,455 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/data/401fe53d7/58e15f8ecce8459e8f2904ff223cac72 [2018-11-10 05:54:58,457 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 05:54:58,458 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 05:54:58,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 05:54:58,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 05:54:58,461 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 05:54:58,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:54:58" (1/1) ... [2018-11-10 05:54:58,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dc2202b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:54:58, skipping insertion in model container [2018-11-10 05:54:58,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:54:58" (1/1) ... [2018-11-10 05:54:58,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 05:54:58,482 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 05:54:58,578 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:54:58,581 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 05:54:58,590 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:54:58,599 INFO L193 MainTranslator]: Completed translation [2018-11-10 05:54:58,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:54:58 WrapperNode [2018-11-10 05:54:58,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 05:54:58,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 05:54:58,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 05:54:58,600 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 05:54:58,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:54:58" (1/1) ... [2018-11-10 05:54:58,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:54:58" (1/1) ... [2018-11-10 05:54:58,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:54:58" (1/1) ... [2018-11-10 05:54:58,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:54:58" (1/1) ... [2018-11-10 05:54:58,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:54:58" (1/1) ... [2018-11-10 05:54:58,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:54:58" (1/1) ... [2018-11-10 05:54:58,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:54:58" (1/1) ... [2018-11-10 05:54:58,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 05:54:58,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 05:54:58,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 05:54:58,618 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 05:54:58,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:54:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 05:54:58,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 05:54:58,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 05:54:58,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 05:54:58,702 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 05:54:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 05:54:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 05:54:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2018-11-10 05:54:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 05:54:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 05:54:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 05:54:58,797 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 05:54:58,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:54:58 BoogieIcfgContainer [2018-11-10 05:54:58,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 05:54:58,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 05:54:58,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 05:54:58,800 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 05:54:58,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 05:54:58" (1/3) ... [2018-11-10 05:54:58,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57104fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:54:58, skipping insertion in model container [2018-11-10 05:54:58,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:54:58" (2/3) ... [2018-11-10 05:54:58,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57104fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:54:58, skipping insertion in model container [2018-11-10 05:54:58,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:54:58" (3/3) ... [2018-11-10 05:54:58,802 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-11-10 05:54:58,808 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 05:54:58,812 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 05:54:58,821 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 05:54:58,843 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 05:54:58,844 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 05:54:58,844 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 05:54:58,844 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 05:54:58,844 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 05:54:58,845 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 05:54:58,845 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 05:54:58,845 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 05:54:58,845 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 05:54:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-10 05:54:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 05:54:58,862 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:54:58,863 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:54:58,864 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:54:58,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:54:58,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2018-11-10 05:54:58,871 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:54:58,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:54:58,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:54:58,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:54:58,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:54:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:54:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:54:58,949 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:54:58,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 05:54:58,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 05:54:58,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 05:54:58,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 05:54:58,961 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-11-10 05:54:58,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:54:58,973 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-11-10 05:54:58,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 05:54:58,974 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-10 05:54:58,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:54:58,979 INFO L225 Difference]: With dead ends: 31 [2018-11-10 05:54:58,979 INFO L226 Difference]: Without dead ends: 14 [2018-11-10 05:54:58,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 05:54:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-10 05:54:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-10 05:54:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-10 05:54:59,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-11-10 05:54:59,008 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-11-10 05:54:59,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:54:59,008 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-11-10 05:54:59,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 05:54:59,008 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-11-10 05:54:59,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 05:54:59,009 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:54:59,009 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:54:59,009 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:54:59,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:54:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1143179357, now seen corresponding path program 1 times [2018-11-10 05:54:59,009 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:54:59,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:54:59,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:54:59,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:54:59,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:54:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:54:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:54:59,061 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:54:59,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 05:54:59,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 05:54:59,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 05:54:59,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 05:54:59,063 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-11-10 05:54:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:54:59,099 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-11-10 05:54:59,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 05:54:59,100 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-10 05:54:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:54:59,100 INFO L225 Difference]: With dead ends: 21 [2018-11-10 05:54:59,100 INFO L226 Difference]: Without dead ends: 16 [2018-11-10 05:54:59,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 05:54:59,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-10 05:54:59,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-10 05:54:59,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-10 05:54:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-11-10 05:54:59,103 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2018-11-10 05:54:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:54:59,104 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-11-10 05:54:59,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 05:54:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-11-10 05:54:59,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-10 05:54:59,104 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:54:59,104 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:54:59,104 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:54:59,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:54:59,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1652058138, now seen corresponding path program 1 times [2018-11-10 05:54:59,105 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:54:59,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:54:59,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:54:59,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:54:59,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:54:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:54:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:54:59,128 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:54:59,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 05:54:59,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 05:54:59,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 05:54:59,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 05:54:59,128 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 3 states. [2018-11-10 05:54:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:54:59,141 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-11-10 05:54:59,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 05:54:59,142 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-11-10 05:54:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:54:59,142 INFO L225 Difference]: With dead ends: 27 [2018-11-10 05:54:59,142 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 05:54:59,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 05:54:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 05:54:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-11-10 05:54:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-10 05:54:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-11-10 05:54:59,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2018-11-10 05:54:59,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:54:59,145 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-11-10 05:54:59,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 05:54:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-11-10 05:54:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-10 05:54:59,146 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:54:59,146 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:54:59,146 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:54:59,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:54:59,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1833562532, now seen corresponding path program 1 times [2018-11-10 05:54:59,146 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:54:59,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:54:59,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:54:59,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:54:59,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:54:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:54:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:54:59,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:54:59,322 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:54:59,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:54:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:54:59,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:54:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:54:59,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:54:59,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-11-10 05:54:59,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 05:54:59,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 05:54:59,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:54:59,477 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 12 states. [2018-11-10 05:54:59,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:54:59,583 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-10 05:54:59,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:54:59,584 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-11-10 05:54:59,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:54:59,584 INFO L225 Difference]: With dead ends: 30 [2018-11-10 05:54:59,584 INFO L226 Difference]: Without dead ends: 24 [2018-11-10 05:54:59,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:54:59,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-10 05:54:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-10 05:54:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 05:54:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-11-10 05:54:59,589 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2018-11-10 05:54:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:54:59,589 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-11-10 05:54:59,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 05:54:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-11-10 05:54:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 05:54:59,590 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:54:59,590 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:54:59,590 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:54:59,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:54:59,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1892022867, now seen corresponding path program 1 times [2018-11-10 05:54:59,591 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:54:59,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:54:59,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:54:59,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:54:59,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:54:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:54:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:54:59,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:54:59,620 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:54:59,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:54:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:54:59,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:54:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:54:59,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:54:59,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-10 05:54:59,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-10 05:54:59,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-10 05:54:59,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-10 05:54:59,667 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2018-11-10 05:54:59,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:54:59,687 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-11-10 05:54:59,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-10 05:54:59,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-11-10 05:54:59,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:54:59,688 INFO L225 Difference]: With dead ends: 33 [2018-11-10 05:54:59,688 INFO L226 Difference]: Without dead ends: 24 [2018-11-10 05:54:59,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-10 05:54:59,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-10 05:54:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-10 05:54:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 05:54:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-10 05:54:59,694 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2018-11-10 05:54:59,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:54:59,694 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-10 05:54:59,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-10 05:54:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-10 05:54:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-10 05:54:59,695 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:54:59,695 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:54:59,695 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:54:59,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:54:59,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1658992628, now seen corresponding path program 2 times [2018-11-10 05:54:59,695 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:54:59,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:54:59,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:54:59,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:54:59,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:54:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:54:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:54:59,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:54:59,732 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:54:59,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:54:59,746 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:54:59,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:54:59,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:54:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:54:59,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:54:59,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-10 05:54:59,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 05:54:59,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 05:54:59,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 05:54:59,768 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2018-11-10 05:54:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:54:59,788 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-11-10 05:54:59,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 05:54:59,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-11-10 05:54:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:54:59,789 INFO L225 Difference]: With dead ends: 35 [2018-11-10 05:54:59,789 INFO L226 Difference]: Without dead ends: 26 [2018-11-10 05:54:59,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-10 05:54:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-10 05:54:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-11-10 05:54:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-10 05:54:59,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-11-10 05:54:59,793 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2018-11-10 05:54:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:54:59,793 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-11-10 05:54:59,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 05:54:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-11-10 05:54:59,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-10 05:54:59,794 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:54:59,794 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:54:59,794 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:54:59,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:54:59,794 INFO L82 PathProgramCache]: Analyzing trace with hash 849646002, now seen corresponding path program 2 times [2018-11-10 05:54:59,794 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:54:59,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:54:59,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:54:59,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:54:59,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:54:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:54:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-10 05:54:59,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:54:59,915 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:54:59,929 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:54:59,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:54:59,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:54:59,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:55:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:55:00,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:55:00,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 17 [2018-11-10 05:55:00,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 05:55:00,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 05:55:00,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-11-10 05:55:00,095 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 17 states. [2018-11-10 05:55:00,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:55:00,281 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-11-10 05:55:00,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 05:55:00,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-11-10 05:55:00,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:55:00,282 INFO L225 Difference]: With dead ends: 38 [2018-11-10 05:55:00,282 INFO L226 Difference]: Without dead ends: 32 [2018-11-10 05:55:00,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2018-11-10 05:55:00,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-10 05:55:00,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2018-11-10 05:55:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-10 05:55:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-11-10 05:55:00,285 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2018-11-10 05:55:00,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:55:00,285 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-11-10 05:55:00,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 05:55:00,286 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-11-10 05:55:00,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 05:55:00,286 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:55:00,286 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:55:00,286 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:55:00,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:55:00,286 INFO L82 PathProgramCache]: Analyzing trace with hash -418779461, now seen corresponding path program 3 times [2018-11-10 05:55:00,287 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:55:00,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:55:00,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:55:00,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:55:00,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:55:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:55:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:55:00,314 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 05:55:00,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 05:55:00 BoogieIcfgContainer [2018-11-10 05:55:00,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 05:55:00,328 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 05:55:00,328 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 05:55:00,328 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 05:55:00,329 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:54:58" (3/4) ... [2018-11-10 05:55:00,330 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 05:55:00,356 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_fae03d79-cf27-4730-a080-e17c8f8f5a9a/bin-2019/uautomizer/witness.graphml [2018-11-10 05:55:00,356 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 05:55:00,356 INFO L168 Benchmark]: Toolchain (without parser) took 1899.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 174.1 MB). Free memory was 958.1 MB in the beginning and 943.2 MB in the end (delta: 14.9 MB). Peak memory consumption was 188.9 MB. Max. memory is 11.5 GB. [2018-11-10 05:55:00,357 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:55:00,357 INFO L168 Benchmark]: CACSL2BoogieTranslator took 141.06 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 05:55:00,358 INFO L168 Benchmark]: Boogie Preprocessor took 18.30 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:55:00,358 INFO L168 Benchmark]: RCFGBuilder took 179.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 174.1 MB). Free memory was 947.3 MB in the beginning and 1.2 GB in the end (delta: -214.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2018-11-10 05:55:00,358 INFO L168 Benchmark]: TraceAbstraction took 1530.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 946.6 MB in the end (delta: 211.8 MB). Peak memory consumption was 211.8 MB. Max. memory is 11.5 GB. [2018-11-10 05:55:00,358 INFO L168 Benchmark]: Witness Printer took 27.78 ms. Allocated memory is still 1.2 GB. Free memory was 946.6 MB in the beginning and 943.2 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-10 05:55:00,360 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 141.06 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.30 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 179.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 174.1 MB). Free memory was 947.3 MB in the beginning and 1.2 GB in the end (delta: -214.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1530.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 946.6 MB in the end (delta: 211.8 MB). Peak memory consumption was 211.8 MB. Max. memory is 11.5 GB. * Witness Printer took 27.78 ms. Allocated memory is still 1.2 GB. Free memory was 946.6 MB in the beginning and 943.2 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=4, n=0] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=1, n=4, n=2] [L15] COND FALSE !(i==4) VAL [i=1, n=4, n=2] [L13] i++ VAL [i=2, n=4, n=2] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=2, n=4, n=4] [L15] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L13] i++ VAL [i=3, n=4, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=3, n=4, n=6] [L15] COND FALSE !(i==4) VAL [i=3, n=4, n=6] [L13] i++ VAL [i=4, n=6, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=4, n=4, n=8] [L15] COND TRUE i==4 [L15] sn=-10 VAL [i=4, n=-10, n=4] [L13] i++ VAL [i=5, n=-10, n=4] [L13] COND FALSE !(i<=n) VAL [i=5, n=4, n=-10] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 1.4s OverallTime, 8 OverallIterations, 5 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 92 SDtfs, 21 SDslu, 243 SDs, 0 SdLazy, 249 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 223 NumberOfCodeBlocks, 223 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 185 ConstructedInterpolants, 0 QuantifiedInterpolants, 14665 SizeOfPredicates, 8 NumberOfNonLiveVariables, 177 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 36/94 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...