./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/sum_15x0_true-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_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_15x0_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/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 7f140b11074e684b22c263036fee9fde5b4c087a ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 13:39:04,994 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:39:04,995 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:39:05,004 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:39:05,005 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:39:05,006 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:39:05,007 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:39:05,008 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:39:05,009 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:39:05,010 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:39:05,011 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:39:05,011 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:39:05,011 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:39:05,012 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:39:05,013 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:39:05,013 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:39:05,014 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:39:05,015 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:39:05,016 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:39:05,017 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:39:05,018 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:39:05,019 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:39:05,020 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:39:05,020 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:39:05,020 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:39:05,021 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:39:05,022 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:39:05,022 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:39:05,023 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:39:05,024 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:39:05,024 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:39:05,024 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:39:05,025 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:39:05,025 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:39:05,025 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:39:05,026 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:39:05,026 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 13:39:05,034 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:39:05,034 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:39:05,035 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 13:39:05,035 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 13:39:05,036 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 13:39:05,036 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 13:39:05,036 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 13:39:05,036 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:39:05,036 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 13:39:05,036 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 13:39:05,037 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 13:39:05,037 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:39:05,037 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 13:39:05,037 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:39:05,037 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 13:39:05,037 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 13:39:05,038 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 13:39:05,038 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:39:05,038 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 13:39:05,038 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:39:05,038 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:39:05,038 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:39:05,039 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:39:05,039 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:39:05,039 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:39:05,039 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:39:05,039 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 13:39:05,039 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 13:39:05,040 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:39:05,040 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 13:39:05,040 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_7b768e8f-4db8-47c1-b76d-e7a45374d9df/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 -> 7f140b11074e684b22c263036fee9fde5b4c087a [2018-11-18 13:39:05,064 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:39:05,072 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:39:05,075 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:39:05,076 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:39:05,076 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:39:05,077 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_15x0_true-unreach-call_true-termination.c [2018-11-18 13:39:05,117 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/data/0d0881f80/1e79aa9775204e5a936a69c685f2847e/FLAGb65ddb340 [2018-11-18 13:39:05,449 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:39:05,449 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/sv-benchmarks/c/recursive-simple/sum_15x0_true-unreach-call_true-termination.c [2018-11-18 13:39:05,454 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/data/0d0881f80/1e79aa9775204e5a936a69c685f2847e/FLAGb65ddb340 [2018-11-18 13:39:05,882 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/data/0d0881f80/1e79aa9775204e5a936a69c685f2847e [2018-11-18 13:39:05,885 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:39:05,886 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 13:39:05,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:39:05,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:39:05,890 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:39:05,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:39:05" (1/1) ... [2018-11-18 13:39:05,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@383ef775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:39:05, skipping insertion in model container [2018-11-18 13:39:05,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:39:05" (1/1) ... [2018-11-18 13:39:05,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:39:05,916 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:39:06,038 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:39:06,040 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:39:06,052 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:39:06,061 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:39:06,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:39:06 WrapperNode [2018-11-18 13:39:06,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:39:06,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:39:06,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:39:06,063 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:39:06,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:39:06" (1/1) ... [2018-11-18 13:39:06,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:39:06" (1/1) ... [2018-11-18 13:39:06,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:39:06" (1/1) ... [2018-11-18 13:39:06,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:39:06" (1/1) ... [2018-11-18 13:39:06,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:39:06" (1/1) ... [2018-11-18 13:39:06,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:39:06" (1/1) ... [2018-11-18 13:39:06,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:39:06" (1/1) ... [2018-11-18 13:39:06,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:39:06,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:39:06,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:39:06,083 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:39:06,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:39:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/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 13:39:06,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:39:06,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:39:06,166 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-18 13:39:06,166 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:39:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 13:39:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-18 13:39:06,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:39:06,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:39:06,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:39:06,277 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:39:06,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:39:06 BoogieIcfgContainer [2018-11-18 13:39:06,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:39:06,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:39:06,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:39:06,281 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:39:06,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:39:05" (1/3) ... [2018-11-18 13:39:06,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d22b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:39:06, skipping insertion in model container [2018-11-18 13:39:06,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:39:06" (2/3) ... [2018-11-18 13:39:06,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d22b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:39:06, skipping insertion in model container [2018-11-18 13:39:06,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:39:06" (3/3) ... [2018-11-18 13:39:06,284 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_15x0_true-unreach-call_true-termination.c [2018-11-18 13:39:06,290 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:39:06,296 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 13:39:06,306 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 13:39:06,328 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 13:39:06,328 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:39:06,328 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 13:39:06,329 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:39:06,329 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:39:06,329 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:39:06,329 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:39:06,329 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:39:06,329 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:39:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 13:39:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 13:39:06,350 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:06,350 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:06,353 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:06,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:06,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-11-18 13:39:06,361 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:06,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:06,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:06,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:39:06,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:06,512 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 13:39:06,514 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:39:06,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:39:06,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:39:06,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:39:06,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:39:06,535 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-18 13:39:06,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:06,622 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-18 13:39:06,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:39:06,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 13:39:06,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:06,632 INFO L225 Difference]: With dead ends: 30 [2018-11-18 13:39:06,632 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 13:39:06,634 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 13:39:06,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 13:39:06,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 13:39:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 13:39:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-18 13:39:06,666 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-18 13:39:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:06,666 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-18 13:39:06,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:39:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-18 13:39:06,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 13:39:06,668 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:06,668 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:06,668 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:06,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:06,669 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-11-18 13:39:06,669 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:06,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:06,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:06,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:39:06,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 13:39:06,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:06,733 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/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 13:39:06,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:39:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:06,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 13:39:06,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:06,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-18 13:39:06,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 13:39:06,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 13:39:06,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:39:06,814 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-18 13:39:06,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:06,890 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-18 13:39:06,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 13:39:06,890 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-18 13:39:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:06,891 INFO L225 Difference]: With dead ends: 25 [2018-11-18 13:39:06,891 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 13:39:06,892 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 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 13:39:06,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 13:39:06,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 13:39:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 13:39:06,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-18 13:39:06,897 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-18 13:39:06,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:06,897 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-18 13:39:06,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 13:39:06,898 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-18 13:39:06,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 13:39:06,899 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:06,899 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:06,900 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:06,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:06,900 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-11-18 13:39:06,900 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:06,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:06,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:06,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:39:06,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 13:39:06,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:06,986 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/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 13:39:07,000 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:39:07,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:39:07,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:39:07,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 13:39:07,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:07,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-18 13:39:07,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 13:39:07,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 13:39:07,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:39:07,058 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-18 13:39:07,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:07,111 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-18 13:39:07,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 13:39:07,111 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-18 13:39:07,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:07,112 INFO L225 Difference]: With dead ends: 28 [2018-11-18 13:39:07,112 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 13:39:07,113 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-18 13:39:07,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 13:39:07,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 13:39:07,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 13:39:07,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 13:39:07,118 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-18 13:39:07,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:07,119 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 13:39:07,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 13:39:07,119 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 13:39:07,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 13:39:07,120 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:07,120 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:07,120 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:07,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2018-11-18 13:39:07,121 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:07,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:07,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:07,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:39:07,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 13:39:07,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:07,217 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/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 13:39:07,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:39:07,248 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-18 13:39:07,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:39:07,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 13:39:07,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:07,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-18 13:39:07,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 13:39:07,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 13:39:07,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:39:07,287 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-18 13:39:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:07,352 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-18 13:39:07,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 13:39:07,353 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-18 13:39:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:07,354 INFO L225 Difference]: With dead ends: 31 [2018-11-18 13:39:07,354 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 13:39:07,354 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 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 13:39:07,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 13:39:07,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-18 13:39:07,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 13:39:07,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-18 13:39:07,358 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-18 13:39:07,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:07,358 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-18 13:39:07,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 13:39:07,358 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-18 13:39:07,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 13:39:07,359 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:07,359 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:07,359 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:07,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:07,359 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2018-11-18 13:39:07,359 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:07,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:07,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:07,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:39:07,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 13:39:07,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:07,433 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/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 13:39:07,446 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:39:07,464 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:39:07,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:39:07,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 13:39:07,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:07,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-18 13:39:07,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 13:39:07,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 13:39:07,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-18 13:39:07,508 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-18 13:39:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:07,598 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-18 13:39:07,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 13:39:07,598 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-18 13:39:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:07,600 INFO L225 Difference]: With dead ends: 34 [2018-11-18 13:39:07,600 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 13:39:07,600 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-18 13:39:07,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 13:39:07,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-18 13:39:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 13:39:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-18 13:39:07,606 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-18 13:39:07,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:07,607 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-18 13:39:07,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 13:39:07,607 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-18 13:39:07,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 13:39:07,608 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:07,608 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:07,609 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:07,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:07,609 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2018-11-18 13:39:07,609 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:07,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:07,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:07,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:39:07,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 13:39:07,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:07,723 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/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 13:39:07,732 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 13:39:07,753 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-18 13:39:07,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:39:07,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 13:39:07,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:07,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-18 13:39:07,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 13:39:07,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 13:39:07,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-18 13:39:07,801 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-18 13:39:07,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:07,893 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-18 13:39:07,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 13:39:07,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-18 13:39:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:07,895 INFO L225 Difference]: With dead ends: 37 [2018-11-18 13:39:07,895 INFO L226 Difference]: Without dead ends: 33 [2018-11-18 13:39:07,896 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-18 13:39:07,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-18 13:39:07,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-18 13:39:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 13:39:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-18 13:39:07,901 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-18 13:39:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:07,901 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-18 13:39:07,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 13:39:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-18 13:39:07,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 13:39:07,903 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:07,903 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:07,903 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:07,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:07,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2018-11-18 13:39:07,904 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:07,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:07,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:07,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:39:07,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 13:39:08,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:08,019 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/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 13:39:08,036 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 13:39:08,062 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-18 13:39:08,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:39:08,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 13:39:08,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:08,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-18 13:39:08,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 13:39:08,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 13:39:08,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-18 13:39:08,104 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-18 13:39:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:08,194 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-18 13:39:08,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 13:39:08,195 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-18 13:39:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:08,196 INFO L225 Difference]: With dead ends: 40 [2018-11-18 13:39:08,196 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 13:39:08,196 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-18 13:39:08,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 13:39:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-18 13:39:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 13:39:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-18 13:39:08,201 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-18 13:39:08,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:08,201 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-18 13:39:08,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 13:39:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-18 13:39:08,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-18 13:39:08,203 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:08,203 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:08,203 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:08,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:08,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2018-11-18 13:39:08,204 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:08,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:08,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:08,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:39:08,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 13:39:08,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:08,304 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:39:08,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:39:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:08,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 13:39:08,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:08,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-18 13:39:08,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 13:39:08,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 13:39:08,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:39:08,369 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-18 13:39:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:08,496 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-18 13:39:08,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 13:39:08,496 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-18 13:39:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:08,497 INFO L225 Difference]: With dead ends: 43 [2018-11-18 13:39:08,498 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 13:39:08,498 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-18 13:39:08,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 13:39:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-18 13:39:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 13:39:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-18 13:39:08,504 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-18 13:39:08,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:08,504 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-18 13:39:08,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 13:39:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-18 13:39:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 13:39:08,506 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:08,506 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:08,506 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:08,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:08,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2018-11-18 13:39:08,507 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:08,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:08,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:08,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:39:08,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 13:39:08,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:08,651 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:39:08,660 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:39:08,679 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:39:08,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:39:08,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 13:39:08,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:08,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-18 13:39:08,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 13:39:08,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 13:39:08,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-18 13:39:08,733 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-18 13:39:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:08,831 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-18 13:39:08,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 13:39:08,831 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-18 13:39:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:08,832 INFO L225 Difference]: With dead ends: 46 [2018-11-18 13:39:08,832 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 13:39:08,833 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-18 13:39:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 13:39:08,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-18 13:39:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 13:39:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-18 13:39:08,838 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-18 13:39:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:08,839 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-18 13:39:08,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 13:39:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-18 13:39:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-18 13:39:08,840 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:08,840 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:08,840 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:08,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:08,840 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2018-11-18 13:39:08,841 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:08,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:08,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:08,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:39:08,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 13:39:08,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:08,954 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:39:08,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:39:08,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-18 13:39:08,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:39:08,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 13:39:09,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:09,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-18 13:39:09,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 13:39:09,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 13:39:09,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-18 13:39:09,034 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-18 13:39:09,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:09,150 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-18 13:39:09,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 13:39:09,150 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-18 13:39:09,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:09,151 INFO L225 Difference]: With dead ends: 49 [2018-11-18 13:39:09,151 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 13:39:09,152 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-18 13:39:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 13:39:09,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-18 13:39:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 13:39:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-18 13:39:09,157 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-18 13:39:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:09,158 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-18 13:39:09,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 13:39:09,158 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-18 13:39:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-18 13:39:09,159 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:09,159 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:09,159 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:09,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:09,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2018-11-18 13:39:09,160 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:09,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:09,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:09,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:39:09,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 13:39:09,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:09,280 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:39:09,295 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:39:09,324 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:39:09,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:39:09,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 13:39:09,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:09,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-18 13:39:09,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 13:39:09,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 13:39:09,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-18 13:39:09,379 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-18 13:39:09,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:09,523 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-18 13:39:09,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 13:39:09,523 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-18 13:39:09,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:09,524 INFO L225 Difference]: With dead ends: 52 [2018-11-18 13:39:09,524 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 13:39:09,525 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-18 13:39:09,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 13:39:09,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-18 13:39:09,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 13:39:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-18 13:39:09,529 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-18 13:39:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:09,530 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-18 13:39:09,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 13:39:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-18 13:39:09,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-18 13:39:09,531 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:09,531 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:09,531 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:09,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:09,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2018-11-18 13:39:09,532 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:09,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:09,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:09,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:39:09,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-18 13:39:09,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:09,703 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:39:09,711 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 13:39:09,751 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-18 13:39:09,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:39:09,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-18 13:39:09,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:09,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-18 13:39:09,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 13:39:09,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 13:39:09,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-18 13:39:09,811 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-18 13:39:09,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:09,973 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-18 13:39:09,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 13:39:09,974 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-18 13:39:09,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:09,975 INFO L225 Difference]: With dead ends: 55 [2018-11-18 13:39:09,975 INFO L226 Difference]: Without dead ends: 51 [2018-11-18 13:39:09,976 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-18 13:39:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-18 13:39:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-18 13:39:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-18 13:39:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-18 13:39:09,984 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-18 13:39:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:09,984 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-18 13:39:09,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 13:39:09,984 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-18 13:39:09,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-18 13:39:09,985 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:09,986 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:09,986 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:09,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:09,986 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2018-11-18 13:39:09,986 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:09,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:09,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:09,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:39:09,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-18 13:39:10,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:10,171 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:39:10,183 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 13:39:10,234 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-18 13:39:10,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:39:10,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-18 13:39:10,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:10,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-18 13:39:10,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 13:39:10,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 13:39:10,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-18 13:39:10,306 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-18 13:39:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:10,514 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-18 13:39:10,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 13:39:10,515 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-18 13:39:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:10,515 INFO L225 Difference]: With dead ends: 58 [2018-11-18 13:39:10,515 INFO L226 Difference]: Without dead ends: 54 [2018-11-18 13:39:10,516 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-18 13:39:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-18 13:39:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-18 13:39:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-18 13:39:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-18 13:39:10,522 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-18 13:39:10,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:10,522 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-18 13:39:10,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 13:39:10,522 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-18 13:39:10,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-18 13:39:10,523 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:10,523 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:10,524 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:10,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:10,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2018-11-18 13:39:10,524 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:10,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:10,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:10,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:39:10,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-18 13:39:10,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:10,654 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:39:10,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:39:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:10,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-18 13:39:10,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:10,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-18 13:39:10,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 13:39:10,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 13:39:10,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-18 13:39:10,739 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-18 13:39:10,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:10,910 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-18 13:39:10,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-18 13:39:10,910 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-18 13:39:10,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:10,911 INFO L225 Difference]: With dead ends: 61 [2018-11-18 13:39:10,911 INFO L226 Difference]: Without dead ends: 57 [2018-11-18 13:39:10,911 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-18 13:39:10,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-18 13:39:10,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-18 13:39:10,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 13:39:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-18 13:39:10,916 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-18 13:39:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:10,917 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-18 13:39:10,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 13:39:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-18 13:39:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-18 13:39:10,918 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:10,918 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:10,918 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:10,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:10,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2018-11-18 13:39:10,919 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:10,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:10,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:10,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:39:10,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-18 13:39:11,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:11,085 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:39:11,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 13:39:11,117 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 13:39:11,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:39:11,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-18 13:39:11,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:11,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-18 13:39:11,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-18 13:39:11,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-18 13:39:11,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-18 13:39:11,184 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-18 13:39:11,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:11,386 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-18 13:39:11,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 13:39:11,387 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-18 13:39:11,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:11,388 INFO L225 Difference]: With dead ends: 64 [2018-11-18 13:39:11,388 INFO L226 Difference]: Without dead ends: 60 [2018-11-18 13:39:11,388 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 13:39:11,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-18 13:39:11,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-18 13:39:11,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-18 13:39:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-18 13:39:11,392 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-18 13:39:11,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:11,392 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-18 13:39:11,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-18 13:39:11,392 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-18 13:39:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-18 13:39:11,393 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:11,393 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:11,393 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:11,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2018-11-18 13:39:11,393 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:11,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:11,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:11,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:39:11,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 374 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2018-11-18 13:39:12,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:12,238 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:39:12,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:39:12,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-18 13:39:12,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:39:12,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2018-11-18 13:39:12,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:12,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 43 [2018-11-18 13:39:12,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-18 13:39:12,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-18 13:39:12,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1715, Unknown=0, NotChecked=0, Total=1806 [2018-11-18 13:39:12,565 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 43 states. [2018-11-18 13:39:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:14,171 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-18 13:39:14,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-18 13:39:14,171 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 103 [2018-11-18 13:39:14,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:14,172 INFO L225 Difference]: With dead ends: 67 [2018-11-18 13:39:14,172 INFO L226 Difference]: Without dead ends: 63 [2018-11-18 13:39:14,174 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 98 SyntacticMatches, 16 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=374, Invalid=5176, Unknown=0, NotChecked=0, Total=5550 [2018-11-18 13:39:14,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-18 13:39:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-18 13:39:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 13:39:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-18 13:39:14,177 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-18 13:39:14,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:14,178 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-18 13:39:14,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-18 13:39:14,178 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-18 13:39:14,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-18 13:39:14,179 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:39:14,179 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:39:14,179 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:39:14,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:39:14,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2018-11-18 13:39:14,180 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 13:39:14,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 13:39:14,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:14,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:39:14,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:39:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:39:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 31 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-18 13:39:14,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:39:14,362 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:39:14,376 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:39:14,405 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:39:14,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:39:14,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:39:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 31 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-18 13:39:14,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 13:39:14,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-18 13:39:14,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 13:39:14,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 13:39:14,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-11-18 13:39:14,464 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 20 states. [2018-11-18 13:39:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:39:14,609 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-11-18 13:39:14,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 13:39:14,610 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2018-11-18 13:39:14,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:39:14,610 INFO L225 Difference]: With dead ends: 63 [2018-11-18 13:39:14,610 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 13:39:14,611 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 13:39:14,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 13:39:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 13:39:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 13:39:14,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 13:39:14,612 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2018-11-18 13:39:14,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:39:14,612 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 13:39:14,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 13:39:14,612 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 13:39:14,612 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 13:39:14,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 13:39:14,654 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 13:39:14,654 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 13:39:14,654 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 13:39:14,654 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 13:39:14,654 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 13:39:14,654 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 13:39:14,654 INFO L425 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-11-18 13:39:14,654 INFO L421 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (<= |sum_#in~m| sum_~m) (<= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= |sum_#in~n| sum_~n)) [2018-11-18 13:39:14,654 INFO L425 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-11-18 13:39:14,654 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-11-18 13:39:14,654 INFO L425 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-11-18 13:39:14,654 INFO L428 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-11-18 13:39:14,655 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2018-11-18 13:39:14,655 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2018-11-18 13:39:14,655 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-11-18 13:39:14,655 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-11-18 13:39:14,655 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-11-18 13:39:14,655 INFO L421 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 15) (<= 15 main_~a~0)) [2018-11-18 13:39:14,655 INFO L425 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-11-18 13:39:14,655 INFO L425 ceAbstractionStarter]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2018-11-18 13:39:14,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:39:14 BoogieIcfgContainer [2018-11-18 13:39:14,657 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 13:39:14,658 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 13:39:14,658 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 13:39:14,658 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 13:39:14,659 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:39:06" (3/4) ... [2018-11-18 13:39:14,662 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 13:39:14,669 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 13:39:14,670 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-11-18 13:39:14,670 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 13:39:14,675 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 13:39:14,675 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 13:39:14,675 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 13:39:14,702 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7b768e8f-4db8-47c1-b76d-e7a45374d9df/bin-2019/uautomizer/witness.graphml [2018-11-18 13:39:14,702 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 13:39:14,703 INFO L168 Benchmark]: Toolchain (without parser) took 8817.79 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 362.8 MB). Free memory was 959.2 MB in the beginning and 1.2 GB in the end (delta: -204.6 MB). Peak memory consumption was 158.2 MB. Max. memory is 11.5 GB. [2018-11-18 13:39:14,704 INFO L168 Benchmark]: CDTParser took 0.15 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. [2018-11-18 13:39:14,704 INFO L168 Benchmark]: CACSL2BoogieTranslator took 175.80 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:39:14,704 INFO L168 Benchmark]: Boogie Preprocessor took 20.07 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:39:14,705 INFO L168 Benchmark]: RCFGBuilder took 195.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.8 MB). Free memory was 945.8 MB in the beginning and 1.2 GB in the end (delta: -205.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:39:14,705 INFO L168 Benchmark]: TraceAbstraction took 8379.11 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 195.0 MB). Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: -12.3 MB). Peak memory consumption was 182.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:39:14,705 INFO L168 Benchmark]: Witness Printer took 44.21 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:39:14,707 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 175.80 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.07 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 195.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.8 MB). Free memory was 945.8 MB in the beginning and 1.2 GB in the end (delta: -205.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8379.11 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 195.0 MB). Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: -12.3 MB). Peak memory consumption was 182.7 MB. Max. memory is 11.5 GB. * Witness Printer took 44.21 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 8.3s OverallTime, 17 OverallIterations, 17 TraceHistogramMax, 3.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 249 SDtfs, 397 SDslu, 2031 SDs, 0 SdLazy, 2378 SolverSat, 148 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1565 GetRequests, 1172 SyntacticMatches, 16 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, 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, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 28 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 2061 NumberOfCodeBlocks, 2061 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 2028 ConstructedInterpolants, 0 QuantifiedInterpolants, 487248 SizeOfPredicates, 171 NumberOfNonLiveVariables, 3024 ConjunctsInSsa, 437 ConjunctsInUnsatCore, 33 InterpolantComputations, 1 PerfectInterpolantSequences, 5317/9248 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...