./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/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 d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 12:44:36,319 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 12:44:36,320 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 12:44:36,326 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 12:44:36,326 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 12:44:36,326 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 12:44:36,327 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 12:44:36,328 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 12:44:36,328 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 12:44:36,329 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 12:44:36,329 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 12:44:36,329 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 12:44:36,330 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 12:44:36,330 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 12:44:36,331 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 12:44:36,331 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 12:44:36,332 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 12:44:36,333 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 12:44:36,333 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 12:44:36,334 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 12:44:36,335 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 12:44:36,335 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 12:44:36,336 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 12:44:36,336 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 12:44:36,337 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 12:44:36,337 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 12:44:36,337 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 12:44:36,338 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 12:44:36,338 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 12:44:36,339 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 12:44:36,339 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 12:44:36,339 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 12:44:36,339 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 12:44:36,339 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 12:44:36,340 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 12:44:36,340 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 12:44:36,340 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-08 12:44:36,347 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 12:44:36,347 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 12:44:36,348 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 12:44:36,348 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 12:44:36,348 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 12:44:36,348 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 12:44:36,348 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 12:44:36,348 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 12:44:36,349 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 12:44:36,349 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 12:44:36,349 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 12:44:36,349 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 12:44:36,349 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 12:44:36,349 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 12:44:36,349 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 12:44:36,349 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 12:44:36,349 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 12:44:36,349 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 12:44:36,349 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 12:44:36,350 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 12:44:36,350 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 12:44:36,350 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 12:44:36,350 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 12:44:36,350 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 12:44:36,350 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 12:44:36,350 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 12:44:36,350 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 12:44:36,350 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 12:44:36,350 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 12:44:36,350 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 12:44:36,351 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_8e4b8a83-432c-428b-b35a-f54014e3073f/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 -> d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd [2018-12-08 12:44:36,369 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 12:44:36,378 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 12:44:36,380 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 12:44:36,381 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 12:44:36,381 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 12:44:36,381 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c [2018-12-08 12:44:36,418 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/bin-2019/uautomizer/data/5c4d027ab/4a125d04851b479fb6641287675a498d/FLAG7de4157cf [2018-12-08 12:44:36,801 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 12:44:36,802 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c [2018-12-08 12:44:36,805 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/bin-2019/uautomizer/data/5c4d027ab/4a125d04851b479fb6641287675a498d/FLAG7de4157cf [2018-12-08 12:44:36,813 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/bin-2019/uautomizer/data/5c4d027ab/4a125d04851b479fb6641287675a498d [2018-12-08 12:44:36,815 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 12:44:36,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 12:44:36,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 12:44:36,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 12:44:36,818 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 12:44:36,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 12:44:36" (1/1) ... [2018-12-08 12:44:36,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf44b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:44:36, skipping insertion in model container [2018-12-08 12:44:36,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 12:44:36" (1/1) ... [2018-12-08 12:44:36,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 12:44:36,833 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 12:44:36,912 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 12:44:36,914 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 12:44:36,922 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 12:44:36,929 INFO L195 MainTranslator]: Completed translation [2018-12-08 12:44:36,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:44:36 WrapperNode [2018-12-08 12:44:36,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 12:44:36,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 12:44:36,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 12:44:36,930 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 12:44:36,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:44:36" (1/1) ... [2018-12-08 12:44:36,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:44:36" (1/1) ... [2018-12-08 12:44:36,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 12:44:36,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 12:44:36,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 12:44:36,942 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 12:44:36,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:44:36" (1/1) ... [2018-12-08 12:44:36,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:44:36" (1/1) ... [2018-12-08 12:44:36,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:44:36" (1/1) ... [2018-12-08 12:44:36,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:44:36" (1/1) ... [2018-12-08 12:44:36,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:44:36" (1/1) ... [2018-12-08 12:44:36,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:44:36" (1/1) ... [2018-12-08 12:44:36,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:44:36" (1/1) ... [2018-12-08 12:44:36,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 12:44:36,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 12:44:36,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 12:44:36,952 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 12:44:36,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:44:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/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 [2018-12-08 12:44:37,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 12:44:37,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 12:44:37,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 12:44:37,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 12:44:37,014 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 12:44:37,014 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 12:44:37,014 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-08 12:44:37,014 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-08 12:44:37,097 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 12:44:37,097 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-08 12:44:37,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 12:44:37 BoogieIcfgContainer [2018-12-08 12:44:37,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 12:44:37,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 12:44:37,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 12:44:37,100 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 12:44:37,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 12:44:36" (1/3) ... [2018-12-08 12:44:37,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45072128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 12:44:37, skipping insertion in model container [2018-12-08 12:44:37,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 12:44:36" (2/3) ... [2018-12-08 12:44:37,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45072128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 12:44:37, skipping insertion in model container [2018-12-08 12:44:37,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 12:44:37" (3/3) ... [2018-12-08 12:44:37,103 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i10_o10_true-unreach-call_true-termination.c [2018-12-08 12:44:37,108 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 12:44:37,112 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 12:44:37,122 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 12:44:37,141 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 12:44:37,142 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 12:44:37,142 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 12:44:37,142 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 12:44:37,142 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 12:44:37,142 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 12:44:37,142 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 12:44:37,142 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 12:44:37,142 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 12:44:37,153 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-08 12:44:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 12:44:37,158 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:44:37,158 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:44:37,160 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 12:44:37,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:44:37,164 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-12-08 12:44:37,165 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:44:37,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:44:37,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:37,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:44:37,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:44:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 12:44:37,273 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 12:44:37,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 12:44:37,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 12:44:37,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 12:44:37,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 12:44:37,285 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-12-08 12:44:37,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:44:37,323 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-12-08 12:44:37,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 12:44:37,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-08 12:44:37,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:44:37,329 INFO L225 Difference]: With dead ends: 30 [2018-12-08 12:44:37,330 INFO L226 Difference]: Without dead ends: 18 [2018-12-08 12:44:37,332 INFO L631 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 [2018-12-08 12:44:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-08 12:44:37,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-08 12:44:37,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-08 12:44:37,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-08 12:44:37,356 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-12-08 12:44:37,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:44:37,356 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-08 12:44:37,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 12:44:37,356 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-08 12:44:37,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-08 12:44:37,357 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:44:37,357 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:44:37,358 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 12:44:37,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:44:37,358 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-12-08 12:44:37,358 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:44:37,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:44:37,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:37,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:44:37,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:44:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 12:44:37,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:44:37,397 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/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 [2018-12-08 12:44:37,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:44:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:44:37,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:44:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 12:44:37,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:44:37,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-08 12:44:37,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 12:44:37,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 12:44:37,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-08 12:44:37,460 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-12-08 12:44:37,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:44:37,508 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-12-08 12:44:37,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 12:44:37,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-12-08 12:44:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:44:37,509 INFO L225 Difference]: With dead ends: 25 [2018-12-08 12:44:37,509 INFO L226 Difference]: Without dead ends: 21 [2018-12-08 12:44:37,510 INFO L631 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 [2018-12-08 12:44:37,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-08 12:44:37,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-08 12:44:37,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-08 12:44:37,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-08 12:44:37,514 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-12-08 12:44:37,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:44:37,515 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-08 12:44:37,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 12:44:37,515 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-08 12:44:37,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-08 12:44:37,516 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:44:37,516 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:44:37,516 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 12:44:37,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:44:37,516 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-12-08 12:44:37,516 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:44:37,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:44:37,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:37,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:44:37,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:44:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-08 12:44:37,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:44:37,573 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/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 [2018-12-08 12:44:37,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 12:44:37,589 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 12:44:37,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:44:37,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:44:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-08 12:44:37,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:44:37,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-08 12:44:37,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 12:44:37,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 12:44:37,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-08 12:44:37,615 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-12-08 12:44:37,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:44:37,647 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-12-08 12:44:37,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 12:44:37,647 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-12-08 12:44:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:44:37,647 INFO L225 Difference]: With dead ends: 28 [2018-12-08 12:44:37,647 INFO L226 Difference]: Without dead ends: 24 [2018-12-08 12:44:37,648 INFO L631 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 [2018-12-08 12:44:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-08 12:44:37,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-08 12:44:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-08 12:44:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-08 12:44:37,651 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-12-08 12:44:37,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:44:37,651 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-08 12:44:37,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 12:44:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-08 12:44:37,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-08 12:44:37,651 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:44:37,652 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:44:37,652 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 12:44:37,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:44:37,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-12-08 12:44:37,652 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:44:37,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:44:37,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:37,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:44:37,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:44:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-08 12:44:37,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:44:37,700 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/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 [2018-12-08 12:44:37,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 12:44:37,719 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-08 12:44:37,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:44:37,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:44:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-08 12:44:37,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:44:37,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-08 12:44:37,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 12:44:37,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 12:44:37,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-08 12:44:37,758 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-12-08 12:44:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:44:37,797 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-12-08 12:44:37,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 12:44:37,797 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-12-08 12:44:37,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:44:37,798 INFO L225 Difference]: With dead ends: 31 [2018-12-08 12:44:37,798 INFO L226 Difference]: Without dead ends: 27 [2018-12-08 12:44:37,798 INFO L631 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 [2018-12-08 12:44:37,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-08 12:44:37,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-08 12:44:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-08 12:44:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-08 12:44:37,801 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-12-08 12:44:37,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:44:37,801 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-08 12:44:37,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 12:44:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-08 12:44:37,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-08 12:44:37,802 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:44:37,802 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:44:37,802 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 12:44:37,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:44:37,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-12-08 12:44:37,802 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:44:37,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:44:37,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:37,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:44:37,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:44:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-08 12:44:37,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:44:37,863 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/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 [2018-12-08 12:44:37,869 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 12:44:37,876 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 12:44:37,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:44:37,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:44:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-08 12:44:37,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:44:37,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-08 12:44:37,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 12:44:37,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 12:44:37,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-08 12:44:37,908 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-12-08 12:44:37,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:44:37,968 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-12-08 12:44:37,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 12:44:37,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-12-08 12:44:37,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:44:37,969 INFO L225 Difference]: With dead ends: 34 [2018-12-08 12:44:37,969 INFO L226 Difference]: Without dead ends: 30 [2018-12-08 12:44:37,970 INFO L631 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 [2018-12-08 12:44:37,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-08 12:44:37,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-08 12:44:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-08 12:44:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-12-08 12:44:37,973 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-12-08 12:44:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:44:37,973 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-12-08 12:44:37,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 12:44:37,973 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-12-08 12:44:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-08 12:44:37,974 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:44:37,974 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:44:37,974 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 12:44:37,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:44:37,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-12-08 12:44:37,974 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:44:37,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:44:37,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:37,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:44:37,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:44:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-08 12:44:38,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:44:38,041 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/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 [2018-12-08 12:44:38,046 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 12:44:38,058 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-08 12:44:38,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:44:38,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:44:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-08 12:44:38,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:44:38,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-12-08 12:44:38,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 12:44:38,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 12:44:38,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-08 12:44:38,087 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-12-08 12:44:38,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:44:38,157 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-12-08 12:44:38,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 12:44:38,157 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-12-08 12:44:38,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:44:38,158 INFO L225 Difference]: With dead ends: 37 [2018-12-08 12:44:38,158 INFO L226 Difference]: Without dead ends: 33 [2018-12-08 12:44:38,159 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-12-08 12:44:38,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-08 12:44:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-08 12:44:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-08 12:44:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-12-08 12:44:38,163 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-12-08 12:44:38,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:44:38,164 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-12-08 12:44:38,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 12:44:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-12-08 12:44:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-08 12:44:38,165 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:44:38,165 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:44:38,165 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 12:44:38,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:44:38,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-12-08 12:44:38,165 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:44:38,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:44:38,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:38,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:44:38,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:44:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-08 12:44:38,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:44:38,227 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/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 [2018-12-08 12:44:38,232 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 12:44:38,251 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-08 12:44:38,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:44:38,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:44:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-08 12:44:38,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:44:38,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-12-08 12:44:38,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 12:44:38,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 12:44:38,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-08 12:44:38,279 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-12-08 12:44:38,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:44:38,347 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-12-08 12:44:38,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 12:44:38,348 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-12-08 12:44:38,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:44:38,348 INFO L225 Difference]: With dead ends: 40 [2018-12-08 12:44:38,348 INFO L226 Difference]: Without dead ends: 36 [2018-12-08 12:44:38,349 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-08 12:44:38,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-08 12:44:38,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-12-08 12:44:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-08 12:44:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-12-08 12:44:38,352 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-12-08 12:44:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:44:38,352 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-12-08 12:44:38,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 12:44:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-12-08 12:44:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-08 12:44:38,353 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:44:38,353 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:44:38,354 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 12:44:38,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:44:38,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-12-08 12:44:38,354 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:44:38,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:44:38,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:38,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:44:38,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:44:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-08 12:44:38,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:44:38,421 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/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 [2018-12-08 12:44:38,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:44:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:44:38,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:44:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-08 12:44:38,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:44:38,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-12-08 12:44:38,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 12:44:38,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 12:44:38,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-08 12:44:38,465 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-12-08 12:44:38,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:44:38,549 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-12-08 12:44:38,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 12:44:38,550 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-12-08 12:44:38,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:44:38,551 INFO L225 Difference]: With dead ends: 43 [2018-12-08 12:44:38,551 INFO L226 Difference]: Without dead ends: 39 [2018-12-08 12:44:38,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-12-08 12:44:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-08 12:44:38,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-08 12:44:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-08 12:44:38,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-12-08 12:44:38,556 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-12-08 12:44:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:44:38,556 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-12-08 12:44:38,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 12:44:38,557 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-12-08 12:44:38,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-08 12:44:38,557 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:44:38,557 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:44:38,558 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 12:44:38,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:44:38,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-12-08 12:44:38,558 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:44:38,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:44:38,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:38,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 12:44:38,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:44:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-08 12:44:38,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:44:38,642 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/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 [2018-12-08 12:44:38,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 12:44:38,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 12:44:38,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:44:38,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:44:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-08 12:44:38,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:44:38,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-12-08 12:44:38,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 12:44:38,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 12:44:38,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-08 12:44:38,698 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-12-08 12:44:38,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:44:38,778 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-12-08 12:44:38,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 12:44:38,778 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-12-08 12:44:38,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:44:38,779 INFO L225 Difference]: With dead ends: 46 [2018-12-08 12:44:38,779 INFO L226 Difference]: Without dead ends: 42 [2018-12-08 12:44:38,779 INFO L631 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 [2018-12-08 12:44:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-08 12:44:38,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-12-08 12:44:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-08 12:44:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-12-08 12:44:38,782 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-12-08 12:44:38,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:44:38,782 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-12-08 12:44:38,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 12:44:38,782 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-12-08 12:44:38,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-08 12:44:38,783 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:44:38,783 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:44:38,783 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 12:44:38,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:44:38,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-12-08 12:44:38,783 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:44:38,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:44:38,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:38,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:44:38,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:44:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-08 12:44:38,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:44:38,854 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/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 [2018-12-08 12:44:38,859 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 12:44:38,882 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-08 12:44:38,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:44:38,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:44:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-08 12:44:38,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:44:38,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-12-08 12:44:38,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 12:44:38,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 12:44:38,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-08 12:44:38,911 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-12-08 12:44:39,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:44:39,010 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-12-08 12:44:39,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 12:44:39,010 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-12-08 12:44:39,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:44:39,011 INFO L225 Difference]: With dead ends: 49 [2018-12-08 12:44:39,011 INFO L226 Difference]: Without dead ends: 45 [2018-12-08 12:44:39,011 INFO L631 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 [2018-12-08 12:44:39,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-08 12:44:39,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-12-08 12:44:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-08 12:44:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-12-08 12:44:39,014 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-12-08 12:44:39,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:44:39,015 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-12-08 12:44:39,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 12:44:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-12-08 12:44:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-08 12:44:39,016 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:44:39,016 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:44:39,016 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 12:44:39,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:44:39,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-12-08 12:44:39,016 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:44:39,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:44:39,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:39,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:44:39,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:44:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-08 12:44:39,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 12:44:39,290 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/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 [2018-12-08 12:44:39,298 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 12:44:39,311 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 12:44:39,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 12:44:39,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 12:44:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-08 12:44:39,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 12:44:39,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-12-08 12:44:39,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-08 12:44:39,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-08 12:44:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-12-08 12:44:39,373 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2018-12-08 12:44:39,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:44:39,516 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-12-08 12:44:39,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-08 12:44:39,516 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-12-08 12:44:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:44:39,517 INFO L225 Difference]: With dead ends: 52 [2018-12-08 12:44:39,517 INFO L226 Difference]: Without dead ends: 48 [2018-12-08 12:44:39,517 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-12-08 12:44:39,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-08 12:44:39,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-12-08 12:44:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-08 12:44:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-12-08 12:44:39,521 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-12-08 12:44:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:44:39,521 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-12-08 12:44:39,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-08 12:44:39,521 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-12-08 12:44:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-12-08 12:44:39,522 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 12:44:39,522 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 12:44:39,522 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 12:44:39,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 12:44:39,522 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-12-08 12:44:39,522 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 12:44:39,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 12:44:39,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:39,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 12:44:39,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 12:44:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 12:44:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-08 12:44:39,645 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 12:44:39,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2018-12-08 12:44:39,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-08 12:44:39,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-08 12:44:39,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-12-08 12:44:39,646 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-12-08 12:44:39,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 12:44:39,746 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2018-12-08 12:44:39,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-08 12:44:39,746 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-12-08 12:44:39,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 12:44:39,746 INFO L225 Difference]: With dead ends: 48 [2018-12-08 12:44:39,746 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 12:44:39,747 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-12-08 12:44:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 12:44:39,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 12:44:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 12:44:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 12:44:39,748 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2018-12-08 12:44:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 12:44:39,748 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 12:44:39,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-08 12:44:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 12:44:39,748 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 12:44:39,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-08 12:44:39,765 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-08 12:44:39,765 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-08 12:44:39,765 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-08 12:44:39,765 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-08 12:44:39,766 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-08 12:44:39,766 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-08 12:44:39,766 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-12-08 12:44:39,766 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2018-12-08 12:44:39,766 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2018-12-08 12:44:39,766 INFO L448 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-12-08 12:44:39,766 INFO L448 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-12-08 12:44:39,766 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= 10 main_~input~0) (<= main_~input~0 10)) [2018-12-08 12:44:39,766 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-12-08 12:44:39,766 INFO L448 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2018-12-08 12:44:39,766 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-12-08 12:44:39,766 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-12-08 12:44:39,767 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-12-08 12:44:39,767 INFO L444 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-12-08 12:44:39,767 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-08 12:44:39,767 INFO L448 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-12-08 12:44:39,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 12:44:39 BoogieIcfgContainer [2018-12-08 12:44:39,769 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 12:44:39,769 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 12:44:39,769 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 12:44:39,770 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 12:44:39,770 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 12:44:37" (3/4) ... [2018-12-08 12:44:39,772 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 12:44:39,777 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 12:44:39,777 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 12:44:39,777 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-12-08 12:44:39,779 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-08 12:44:39,779 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-08 12:44:39,779 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 12:44:39,801 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8e4b8a83-432c-428b-b35a-f54014e3073f/bin-2019/uautomizer/witness.graphml [2018-12-08 12:44:39,802 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 12:44:39,802 INFO L168 Benchmark]: Toolchain (without parser) took 2986.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 190.8 MB). Free memory was 954.9 MB in the beginning and 858.4 MB in the end (delta: 96.5 MB). Peak memory consumption was 287.3 MB. Max. memory is 11.5 GB. [2018-12-08 12:44:39,803 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 12:44:39,803 INFO L168 Benchmark]: CACSL2BoogieTranslator took 113.52 ms. Allocated memory is still 1.0 GB. Free memory was 954.9 MB in the beginning and 944.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 12:44:39,803 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.45 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 12:44:39,804 INFO L168 Benchmark]: Boogie Preprocessor took 9.73 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 12:44:39,804 INFO L168 Benchmark]: RCFGBuilder took 146.42 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.5 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -143.7 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2018-12-08 12:44:39,804 INFO L168 Benchmark]: TraceAbstraction took 2670.71 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 82.3 MB). Free memory was 1.1 GB in the beginning and 866.3 MB in the end (delta: 221.6 MB). Peak memory consumption was 303.9 MB. Max. memory is 11.5 GB. [2018-12-08 12:44:39,805 INFO L168 Benchmark]: Witness Printer took 32.27 ms. Allocated memory is still 1.2 GB. Free memory was 866.3 MB in the beginning and 858.4 MB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 11.5 GB. [2018-12-08 12:44:39,806 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 113.52 ms. Allocated memory is still 1.0 GB. Free memory was 954.9 MB in the beginning and 944.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.45 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.73 ms. Allocated memory is still 1.0 GB. Free memory is still 944.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 146.42 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.5 MB). Free memory was 944.2 MB in the beginning and 1.1 GB in the end (delta: -143.7 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2670.71 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 82.3 MB). Free memory was 1.1 GB in the beginning and 866.3 MB in the end (delta: 221.6 MB). Peak memory consumption was 303.9 MB. Max. memory is 11.5 GB. * Witness Printer took 32.27 ms. Allocated memory is still 1.2 GB. Free memory was 866.3 MB in the beginning and 858.4 MB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 2.6s OverallTime, 12 OverallIterations, 12 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 200 SDtfs, 167 SDslu, 1340 SDs, 0 SdLazy, 781 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 709 GetRequests, 528 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=11, 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, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 1012 NumberOfCodeBlocks, 1007 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 990 ConstructedInterpolants, 0 QuantifiedInterpolants, 142392 SizeOfPredicates, 64 NumberOfNonLiveVariables, 1060 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 1584/2794 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...