./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/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 b2c24b72038b46d201b1011ce763d9f0fb09353d ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 12:10:40,529 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 12:10:40,530 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 12:10:40,538 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 12:10:40,538 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 12:10:40,539 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 12:10:40,540 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 12:10:40,541 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 12:10:40,542 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 12:10:40,543 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 12:10:40,544 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 12:10:40,544 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 12:10:40,545 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 12:10:40,545 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 12:10:40,546 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 12:10:40,547 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 12:10:40,547 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 12:10:40,548 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 12:10:40,550 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 12:10:40,551 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 12:10:40,552 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 12:10:40,553 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 12:10:40,554 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 12:10:40,554 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 12:10:40,554 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 12:10:40,555 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 12:10:40,555 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 12:10:40,556 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 12:10:40,556 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 12:10:40,557 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 12:10:40,557 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 12:10:40,557 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 12:10:40,558 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 12:10:40,558 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 12:10:40,558 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 12:10:40,559 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 12:10:40,559 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 12:10:40,567 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 12:10:40,567 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 12:10:40,567 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 12:10:40,568 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 12:10:40,568 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 12:10:40,568 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 12:10:40,568 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 12:10:40,569 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 12:10:40,569 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 12:10:40,569 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 12:10:40,569 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 12:10:40,569 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 12:10:40,569 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 12:10:40,570 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 12:10:40,570 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 12:10:40,570 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 12:10:40,570 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 12:10:40,570 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 12:10:40,570 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 12:10:40,571 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 12:10:40,571 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 12:10:40,571 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 12:10:40,571 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 12:10:40,571 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:10:40,572 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 12:10:40,572 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 12:10:40,572 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 12:10:40,572 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 12:10:40,572 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 12:10:40,572 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 12:10:40,572 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_6308efc4-34f5-4647-89d6-940294bbaa5f/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 -> b2c24b72038b46d201b1011ce763d9f0fb09353d [2018-11-28 12:10:40,601 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 12:10:40,611 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 12:10:40,614 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 12:10:40,615 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 12:10:40,615 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 12:10:40,616 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-11-28 12:10:40,669 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/data/e1afc0710/864d089314c346d7b3f9bc73e49b6161/FLAG230a81926 [2018-11-28 12:10:41,088 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 12:10:41,088 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-11-28 12:10:41,100 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/data/e1afc0710/864d089314c346d7b3f9bc73e49b6161/FLAG230a81926 [2018-11-28 12:10:41,112 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/data/e1afc0710/864d089314c346d7b3f9bc73e49b6161 [2018-11-28 12:10:41,114 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 12:10:41,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 12:10:41,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 12:10:41,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 12:10:41,119 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 12:10:41,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:10:41" (1/1) ... [2018-11-28 12:10:41,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@594db415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:10:41, skipping insertion in model container [2018-11-28 12:10:41,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:10:41" (1/1) ... [2018-11-28 12:10:41,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 12:10:41,157 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 12:10:41,404 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:10:41,475 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 12:10:41,511 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:10:41,547 INFO L195 MainTranslator]: Completed translation [2018-11-28 12:10:41,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:10:41 WrapperNode [2018-11-28 12:10:41,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 12:10:41,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 12:10:41,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 12:10:41,549 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 12:10:41,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:10:41" (1/1) ... [2018-11-28 12:10:41,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:10:41" (1/1) ... [2018-11-28 12:10:41,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 12:10:41,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 12:10:41,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 12:10:41,585 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 12:10:41,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:10:41" (1/1) ... [2018-11-28 12:10:41,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:10:41" (1/1) ... [2018-11-28 12:10:41,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:10:41" (1/1) ... [2018-11-28 12:10:41,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:10:41" (1/1) ... [2018-11-28 12:10:41,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:10:41" (1/1) ... [2018-11-28 12:10:41,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:10:41" (1/1) ... [2018-11-28 12:10:41,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:10:41" (1/1) ... [2018-11-28 12:10:41,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 12:10:41,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 12:10:41,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 12:10:41,604 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 12:10:41,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:10:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:10:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 12:10:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-11-28 12:10:41,646 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-11-28 12:10:41,646 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-11-28 12:10:41,646 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-11-28 12:10:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 12:10:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-11-28 12:10:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 12:10:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-11-28 12:10:41,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 12:10:41,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 12:10:41,648 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-11-28 12:10:41,855 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 12:10:41,856 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-28 12:10:41,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:10:41 BoogieIcfgContainer [2018-11-28 12:10:41,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 12:10:41,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 12:10:41,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 12:10:41,860 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 12:10:41,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:10:41" (1/3) ... [2018-11-28 12:10:41,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794c007f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:10:41, skipping insertion in model container [2018-11-28 12:10:41,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:10:41" (2/3) ... [2018-11-28 12:10:41,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794c007f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:10:41, skipping insertion in model container [2018-11-28 12:10:41,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:10:41" (3/3) ... [2018-11-28 12:10:41,863 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest_true-unreach-call.i [2018-11-28 12:10:41,890 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,890 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,890 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,890 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,891 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,891 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,891 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,891 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,892 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,892 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,892 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,892 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,892 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,893 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,893 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,893 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,893 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,893 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,894 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,894 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,894 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,894 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,894 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,895 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,895 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,895 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,895 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,895 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:10:41,913 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-11-28 12:10:41,913 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 12:10:41,919 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 12:10:41,930 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 12:10:41,948 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 12:10:41,949 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 12:10:41,949 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 12:10:41,949 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 12:10:41,949 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 12:10:41,950 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 12:10:41,950 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 12:10:41,950 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 12:10:41,950 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 12:10:41,957 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-11-28 12:10:42,007 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-11-28 12:10:42,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-11-28 12:10:42,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 12:10:42,016 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:42,016 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:42,018 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:42,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:42,023 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-11-28 12:10:42,024 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:42,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:42,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:42,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:42,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:42,230 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:10:42,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:10:42,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:10:42,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:10:42,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:10:42,245 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-11-28 12:10:42,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:42,356 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-11-28 12:10:42,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:10:42,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-28 12:10:42,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:42,371 INFO L225 Difference]: With dead ends: 1411 [2018-11-28 12:10:42,372 INFO L226 Difference]: Without dead ends: 322 [2018-11-28 12:10:42,373 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:10:42,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-11-28 12:10:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-11-28 12:10:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-28 12:10:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-11-28 12:10:42,426 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-11-28 12:10:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:42,427 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-11-28 12:10:42,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:10:42,427 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-11-28 12:10:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-28 12:10:42,428 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:42,428 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:42,429 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:42,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-11-28 12:10:42,429 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:42,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:42,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:42,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:42,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:42,517 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:10:42,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:10:42,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:10:42,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:10:42,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:10:42,519 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-11-28 12:10:42,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:42,549 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-11-28 12:10:42,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:10:42,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-28 12:10:42,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:42,555 INFO L225 Difference]: With dead ends: 411 [2018-11-28 12:10:42,556 INFO L226 Difference]: Without dead ends: 290 [2018-11-28 12:10:42,557 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:10:42,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-11-28 12:10:42,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-11-28 12:10:42,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-11-28 12:10:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-11-28 12:10:42,570 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-11-28 12:10:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:42,570 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-11-28 12:10:42,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:10:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-11-28 12:10:42,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 12:10:42,572 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:42,572 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:42,572 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:42,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:42,572 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-11-28 12:10:42,572 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:42,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:42,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:42,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:42,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:42,654 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:10:42,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 12:10:42,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 12:10:42,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:10:42,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:10:42,655 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-11-28 12:10:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:42,709 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-11-28 12:10:42,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 12:10:42,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-28 12:10:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:42,712 INFO L225 Difference]: With dead ends: 437 [2018-11-28 12:10:42,712 INFO L226 Difference]: Without dead ends: 309 [2018-11-28 12:10:42,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:10:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-11-28 12:10:42,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-11-28 12:10:42,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-11-28 12:10:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-11-28 12:10:42,726 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-11-28 12:10:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:42,726 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-11-28 12:10:42,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 12:10:42,727 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-11-28 12:10:42,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 12:10:42,728 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:42,728 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:42,728 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:42,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:42,729 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-11-28 12:10:42,729 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:42,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:42,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:42,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:42,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:42,804 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:10:42,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 12:10:42,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 12:10:42,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:10:42,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:10:42,805 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-11-28 12:10:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:42,853 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-11-28 12:10:42,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 12:10:42,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-28 12:10:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:42,855 INFO L225 Difference]: With dead ends: 456 [2018-11-28 12:10:42,855 INFO L226 Difference]: Without dead ends: 319 [2018-11-28 12:10:42,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:10:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-11-28 12:10:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-11-28 12:10:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-11-28 12:10:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-11-28 12:10:42,865 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-11-28 12:10:42,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:42,866 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-11-28 12:10:42,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 12:10:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-11-28 12:10:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 12:10:42,867 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:42,868 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:42,868 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:42,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:42,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-11-28 12:10:42,868 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:42,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:42,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:42,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:42,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:42,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:42,972 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:42,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:43,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:43,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:43,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 12:10:43,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:10:43,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:10:43,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:10:43,126 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-11-28 12:10:43,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:43,274 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-11-28 12:10:43,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 12:10:43,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-28 12:10:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:43,276 INFO L225 Difference]: With dead ends: 466 [2018-11-28 12:10:43,277 INFO L226 Difference]: Without dead ends: 335 [2018-11-28 12:10:43,281 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:10:43,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-11-28 12:10:43,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2018-11-28 12:10:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-11-28 12:10:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 734 transitions. [2018-11-28 12:10:43,291 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 734 transitions. Word has length 29 [2018-11-28 12:10:43,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:43,291 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 734 transitions. [2018-11-28 12:10:43,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:10:43,292 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 734 transitions. [2018-11-28 12:10:43,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 12:10:43,293 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:43,293 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:43,293 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:43,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:43,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-11-28 12:10:43,294 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:43,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:43,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:43,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:43,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:43,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:43,373 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:43,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:43,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:43,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:43,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 12:10:43,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:10:43,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:10:43,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:10:43,451 INFO L87 Difference]: Start difference. First operand 300 states and 734 transitions. Second operand 8 states. [2018-11-28 12:10:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:43,521 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-11-28 12:10:43,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 12:10:43,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-28 12:10:43,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:43,524 INFO L225 Difference]: With dead ends: 482 [2018-11-28 12:10:43,524 INFO L226 Difference]: Without dead ends: 351 [2018-11-28 12:10:43,525 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-11-28 12:10:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-11-28 12:10:43,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-11-28 12:10:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-11-28 12:10:43,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-11-28 12:10:43,533 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-11-28 12:10:43,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:43,534 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-11-28 12:10:43,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:10:43,534 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-11-28 12:10:43,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-28 12:10:43,535 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:43,535 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:43,535 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:43,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:43,536 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 1 times [2018-11-28 12:10:43,536 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:43,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:43,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:43,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:43,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:43,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:43,612 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:43,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:43,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:43,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:43,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 12:10:43,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 12:10:43,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 12:10:43,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-28 12:10:43,707 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-11-28 12:10:43,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:43,794 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-11-28 12:10:43,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 12:10:43,794 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-28 12:10:43,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:43,796 INFO L225 Difference]: With dead ends: 498 [2018-11-28 12:10:43,796 INFO L226 Difference]: Without dead ends: 367 [2018-11-28 12:10:43,796 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:10:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-11-28 12:10:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 316. [2018-11-28 12:10:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-11-28 12:10:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 766 transitions. [2018-11-28 12:10:43,803 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 766 transitions. Word has length 33 [2018-11-28 12:10:43,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:43,803 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 766 transitions. [2018-11-28 12:10:43,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 12:10:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 766 transitions. [2018-11-28 12:10:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-28 12:10:43,804 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:43,804 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:43,804 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:43,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:43,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1110322378, now seen corresponding path program 2 times [2018-11-28 12:10:43,805 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:43,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:43,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:43,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:43,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:43,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:43,871 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:43,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:10:43,897 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:10:43,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:43,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:43,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:43,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 12:10:43,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 12:10:43,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 12:10:43,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-28 12:10:43,945 INFO L87 Difference]: Start difference. First operand 316 states and 766 transitions. Second operand 9 states. [2018-11-28 12:10:44,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:44,038 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-11-28 12:10:44,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 12:10:44,039 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-28 12:10:44,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:44,041 INFO L225 Difference]: With dead ends: 514 [2018-11-28 12:10:44,041 INFO L226 Difference]: Without dead ends: 383 [2018-11-28 12:10:44,041 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:10:44,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-11-28 12:10:44,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-11-28 12:10:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-11-28 12:10:44,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-11-28 12:10:44,049 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-11-28 12:10:44,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:44,049 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-11-28 12:10:44,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 12:10:44,049 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-11-28 12:10:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 12:10:44,050 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:44,050 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:44,051 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:44,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:44,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 3 times [2018-11-28 12:10:44,051 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:44,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:44,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:44,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:44,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:44,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:44,143 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:44,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:10:44,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-28 12:10:44,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:44,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:44,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:44,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 12:10:44,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 12:10:44,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 12:10:44,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-28 12:10:44,217 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-11-28 12:10:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:44,300 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-11-28 12:10:44,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 12:10:44,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-28 12:10:44,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:44,302 INFO L225 Difference]: With dead ends: 530 [2018-11-28 12:10:44,302 INFO L226 Difference]: Without dead ends: 399 [2018-11-28 12:10:44,302 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2018-11-28 12:10:44,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-11-28 12:10:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 332. [2018-11-28 12:10:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-11-28 12:10:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 798 transitions. [2018-11-28 12:10:44,308 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 798 transitions. Word has length 37 [2018-11-28 12:10:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:44,308 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 798 transitions. [2018-11-28 12:10:44,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 12:10:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 798 transitions. [2018-11-28 12:10:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 12:10:44,309 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:44,309 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:44,309 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:44,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:44,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1649592435, now seen corresponding path program 4 times [2018-11-28 12:10:44,310 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:44,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:44,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:44,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:44,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:44,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:44,373 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:44,389 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:10:44,406 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:10:44,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:44,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:44,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:44,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 12:10:44,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 12:10:44,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 12:10:44,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-28 12:10:44,445 INFO L87 Difference]: Start difference. First operand 332 states and 798 transitions. Second operand 10 states. [2018-11-28 12:10:44,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:44,522 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-11-28 12:10:44,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 12:10:44,522 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-28 12:10:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:44,525 INFO L225 Difference]: With dead ends: 546 [2018-11-28 12:10:44,525 INFO L226 Difference]: Without dead ends: 415 [2018-11-28 12:10:44,525 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-11-28 12:10:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-11-28 12:10:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-11-28 12:10:44,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-11-28 12:10:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-11-28 12:10:44,534 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-11-28 12:10:44,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:44,534 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-11-28 12:10:44,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 12:10:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-11-28 12:10:44,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 12:10:44,535 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:44,535 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:44,536 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:44,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:44,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 5 times [2018-11-28 12:10:44,536 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:44,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:44,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:44,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:44,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:44,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:44,612 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:44,633 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:10:44,647 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-11-28 12:10:44,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:44,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:44,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:44,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 12:10:44,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 12:10:44,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 12:10:44,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 12:10:44,702 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-11-28 12:10:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:44,828 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-11-28 12:10:44,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 12:10:44,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-28 12:10:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:44,831 INFO L225 Difference]: With dead ends: 562 [2018-11-28 12:10:44,831 INFO L226 Difference]: Without dead ends: 431 [2018-11-28 12:10:44,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-11-28 12:10:44,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-11-28 12:10:44,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 348. [2018-11-28 12:10:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-11-28 12:10:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 830 transitions. [2018-11-28 12:10:44,839 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 830 transitions. Word has length 41 [2018-11-28 12:10:44,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:44,839 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 830 transitions. [2018-11-28 12:10:44,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 12:10:44,839 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 830 transitions. [2018-11-28 12:10:44,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 12:10:44,840 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:44,840 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:44,840 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:44,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:44,840 INFO L82 PathProgramCache]: Analyzing trace with hash 449750186, now seen corresponding path program 6 times [2018-11-28 12:10:44,841 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:44,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:44,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:44,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:44,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:44,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:44,924 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:44,938 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:10:44,959 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-11-28 12:10:44,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:44,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:45,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:45,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 12:10:45,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 12:10:45,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 12:10:45,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 12:10:45,004 INFO L87 Difference]: Start difference. First operand 348 states and 830 transitions. Second operand 11 states. [2018-11-28 12:10:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:45,088 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-11-28 12:10:45,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 12:10:45,088 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-28 12:10:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:45,090 INFO L225 Difference]: With dead ends: 578 [2018-11-28 12:10:45,090 INFO L226 Difference]: Without dead ends: 447 [2018-11-28 12:10:45,090 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-11-28 12:10:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-11-28 12:10:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-11-28 12:10:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-11-28 12:10:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-11-28 12:10:45,097 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-11-28 12:10:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:45,097 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-11-28 12:10:45,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 12:10:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-11-28 12:10:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 12:10:45,098 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:45,098 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:45,099 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:45,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:45,099 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 7 times [2018-11-28 12:10:45,099 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:45,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:45,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:45,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:45,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:45,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:45,175 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:45,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:45,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:45,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:45,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 12:10:45,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 12:10:45,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 12:10:45,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:10:45,259 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-11-28 12:10:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:45,380 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-11-28 12:10:45,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 12:10:45,381 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-28 12:10:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:45,382 INFO L225 Difference]: With dead ends: 594 [2018-11-28 12:10:45,382 INFO L226 Difference]: Without dead ends: 463 [2018-11-28 12:10:45,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2018-11-28 12:10:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-11-28 12:10:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2018-11-28 12:10:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-11-28 12:10:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 862 transitions. [2018-11-28 12:10:45,388 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 862 transitions. Word has length 45 [2018-11-28 12:10:45,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:45,388 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 862 transitions. [2018-11-28 12:10:45,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 12:10:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 862 transitions. [2018-11-28 12:10:45,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 12:10:45,389 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:45,389 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:45,389 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:45,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:45,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1081163923, now seen corresponding path program 8 times [2018-11-28 12:10:45,390 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:45,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:45,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:45,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:45,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:45,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:45,450 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:45,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:10:45,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:10:45,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:45,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:45,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:45,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 12:10:45,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 12:10:45,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 12:10:45,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:10:45,533 INFO L87 Difference]: Start difference. First operand 364 states and 862 transitions. Second operand 12 states. [2018-11-28 12:10:45,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:45,648 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-11-28 12:10:45,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 12:10:45,649 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-28 12:10:45,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:45,650 INFO L225 Difference]: With dead ends: 610 [2018-11-28 12:10:45,650 INFO L226 Difference]: Without dead ends: 479 [2018-11-28 12:10:45,651 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2018-11-28 12:10:45,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-11-28 12:10:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-11-28 12:10:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-11-28 12:10:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-11-28 12:10:45,661 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-11-28 12:10:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:45,661 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-11-28 12:10:45,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 12:10:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-11-28 12:10:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 12:10:45,662 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:45,662 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:45,663 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:45,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:45,663 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 9 times [2018-11-28 12:10:45,663 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:45,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:45,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:45,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:45,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:45,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:45,747 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:45,755 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:10:45,770 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 12:10:45,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:45,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:45,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:45,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-28 12:10:45,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 12:10:45,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 12:10:45,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-28 12:10:45,809 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-11-28 12:10:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:45,984 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-11-28 12:10:45,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 12:10:45,985 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-28 12:10:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:45,987 INFO L225 Difference]: With dead ends: 626 [2018-11-28 12:10:45,987 INFO L226 Difference]: Without dead ends: 495 [2018-11-28 12:10:45,987 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2018-11-28 12:10:45,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-11-28 12:10:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 380. [2018-11-28 12:10:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-11-28 12:10:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 894 transitions. [2018-11-28 12:10:45,995 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 894 transitions. Word has length 49 [2018-11-28 12:10:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:45,995 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 894 transitions. [2018-11-28 12:10:45,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 12:10:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 894 transitions. [2018-11-28 12:10:45,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 12:10:45,996 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:45,996 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:45,996 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:45,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:45,997 INFO L82 PathProgramCache]: Analyzing trace with hash -555139958, now seen corresponding path program 10 times [2018-11-28 12:10:45,997 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:45,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:45,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:45,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:45,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:46,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:46,068 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:46,079 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:10:46,112 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:10:46,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:46,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:46,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:46,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-28 12:10:46,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 12:10:46,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 12:10:46,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-28 12:10:46,168 INFO L87 Difference]: Start difference. First operand 380 states and 894 transitions. Second operand 13 states. [2018-11-28 12:10:46,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:46,299 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-11-28 12:10:46,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 12:10:46,300 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-28 12:10:46,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:46,302 INFO L225 Difference]: With dead ends: 642 [2018-11-28 12:10:46,302 INFO L226 Difference]: Without dead ends: 511 [2018-11-28 12:10:46,303 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2018-11-28 12:10:46,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-11-28 12:10:46,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-11-28 12:10:46,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-11-28 12:10:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-11-28 12:10:46,311 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-11-28 12:10:46,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:46,311 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-11-28 12:10:46,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 12:10:46,312 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-11-28 12:10:46,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-28 12:10:46,313 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:46,313 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:46,313 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:46,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:46,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 11 times [2018-11-28 12:10:46,314 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:46,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:46,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:46,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:46,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:46,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:46,408 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:46,421 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:10:46,446 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-11-28 12:10:46,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:46,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:46,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:46,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-28 12:10:46,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 12:10:46,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 12:10:46,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:10:46,512 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-11-28 12:10:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:46,672 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-11-28 12:10:46,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 12:10:46,673 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-28 12:10:46,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:46,675 INFO L225 Difference]: With dead ends: 658 [2018-11-28 12:10:46,675 INFO L226 Difference]: Without dead ends: 527 [2018-11-28 12:10:46,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-11-28 12:10:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-11-28 12:10:46,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2018-11-28 12:10:46,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-11-28 12:10:46,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2018-11-28 12:10:46,683 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 53 [2018-11-28 12:10:46,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:46,683 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2018-11-28 12:10:46,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 12:10:46,683 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2018-11-28 12:10:46,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-28 12:10:46,684 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:46,684 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:46,684 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:46,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:46,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1121609549, now seen corresponding path program 12 times [2018-11-28 12:10:46,685 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:46,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:46,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:46,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:46,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:46,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:46,776 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:46,794 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:10:46,820 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-11-28 12:10:46,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:46,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:46,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:46,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-28 12:10:46,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 12:10:46,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 12:10:46,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:10:46,875 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2018-11-28 12:10:47,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:47,053 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-11-28 12:10:47,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 12:10:47,054 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-28 12:10:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:47,055 INFO L225 Difference]: With dead ends: 674 [2018-11-28 12:10:47,055 INFO L226 Difference]: Without dead ends: 543 [2018-11-28 12:10:47,055 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2018-11-28 12:10:47,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-11-28 12:10:47,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-11-28 12:10:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-11-28 12:10:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-11-28 12:10:47,060 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-11-28 12:10:47,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:47,061 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-11-28 12:10:47,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 12:10:47,061 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-11-28 12:10:47,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 12:10:47,062 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:47,062 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:47,062 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:47,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:47,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 13 times [2018-11-28 12:10:47,063 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:47,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:47,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:47,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:47,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:47,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:47,138 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:47,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:47,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:47,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:47,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-28 12:10:47,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 12:10:47,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 12:10:47,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-28 12:10:47,207 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-11-28 12:10:47,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:47,346 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-11-28 12:10:47,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 12:10:47,347 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-28 12:10:47,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:47,349 INFO L225 Difference]: With dead ends: 690 [2018-11-28 12:10:47,349 INFO L226 Difference]: Without dead ends: 559 [2018-11-28 12:10:47,349 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2018-11-28 12:10:47,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-11-28 12:10:47,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 412. [2018-11-28 12:10:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-11-28 12:10:47,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 958 transitions. [2018-11-28 12:10:47,356 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 958 transitions. Word has length 57 [2018-11-28 12:10:47,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:47,357 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 958 transitions. [2018-11-28 12:10:47,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 12:10:47,357 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 958 transitions. [2018-11-28 12:10:47,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 12:10:47,358 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:47,358 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:47,358 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:47,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:47,358 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 14 times [2018-11-28 12:10:47,358 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:47,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:47,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:47,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:47,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:47,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:47,443 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:47,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:10:47,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:10:47,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:47,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:47,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:47,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-28 12:10:47,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 12:10:47,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 12:10:47,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-28 12:10:47,520 INFO L87 Difference]: Start difference. First operand 412 states and 958 transitions. Second operand 15 states. [2018-11-28 12:10:47,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:47,672 INFO L93 Difference]: Finished difference Result 706 states and 1595 transitions. [2018-11-28 12:10:47,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 12:10:47,673 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-28 12:10:47,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:47,674 INFO L225 Difference]: With dead ends: 706 [2018-11-28 12:10:47,674 INFO L226 Difference]: Without dead ends: 575 [2018-11-28 12:10:47,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2018-11-28 12:10:47,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-11-28 12:10:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2018-11-28 12:10:47,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2018-11-28 12:10:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1284 transitions. [2018-11-28 12:10:47,683 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1284 transitions. Word has length 57 [2018-11-28 12:10:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:47,683 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1284 transitions. [2018-11-28 12:10:47,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 12:10:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1284 transitions. [2018-11-28 12:10:47,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 12:10:47,685 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:47,685 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:47,685 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:47,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:47,685 INFO L82 PathProgramCache]: Analyzing trace with hash -21031161, now seen corresponding path program 15 times [2018-11-28 12:10:47,685 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:47,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:47,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:47,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:47,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:47,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:47,790 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:47,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:10:47,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-28 12:10:47,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:47,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:47,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:47,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-28 12:10:47,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 12:10:47,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 12:10:47,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-11-28 12:10:47,884 INFO L87 Difference]: Start difference. First operand 575 states and 1284 transitions. Second operand 16 states. [2018-11-28 12:10:48,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:48,032 INFO L93 Difference]: Finished difference Result 722 states and 1627 transitions. [2018-11-28 12:10:48,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 12:10:48,033 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-11-28 12:10:48,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:48,034 INFO L225 Difference]: With dead ends: 722 [2018-11-28 12:10:48,034 INFO L226 Difference]: Without dead ends: 591 [2018-11-28 12:10:48,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2018-11-28 12:10:48,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-11-28 12:10:48,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 428. [2018-11-28 12:10:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2018-11-28 12:10:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 990 transitions. [2018-11-28 12:10:48,041 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 990 transitions. Word has length 61 [2018-11-28 12:10:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:48,041 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 990 transitions. [2018-11-28 12:10:48,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 12:10:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 990 transitions. [2018-11-28 12:10:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 12:10:48,042 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:48,042 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:48,042 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:48,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:48,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1418711251, now seen corresponding path program 16 times [2018-11-28 12:10:48,043 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:48,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:48,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:48,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:48,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:48,130 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:48,130 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:48,139 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:10:48,160 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:10:48,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:48,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:48,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:48,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-28 12:10:48,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 12:10:48,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 12:10:48,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-11-28 12:10:48,215 INFO L87 Difference]: Start difference. First operand 428 states and 990 transitions. Second operand 16 states. [2018-11-28 12:10:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:48,396 INFO L93 Difference]: Finished difference Result 738 states and 1659 transitions. [2018-11-28 12:10:48,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 12:10:48,396 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-11-28 12:10:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:48,398 INFO L225 Difference]: With dead ends: 738 [2018-11-28 12:10:48,398 INFO L226 Difference]: Without dead ends: 607 [2018-11-28 12:10:48,399 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2018-11-28 12:10:48,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2018-11-28 12:10:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2018-11-28 12:10:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2018-11-28 12:10:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1348 transitions. [2018-11-28 12:10:48,405 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1348 transitions. Word has length 61 [2018-11-28 12:10:48,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:48,405 INFO L480 AbstractCegarLoop]: Abstraction has 607 states and 1348 transitions. [2018-11-28 12:10:48,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 12:10:48,405 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1348 transitions. [2018-11-28 12:10:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-28 12:10:48,407 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:48,407 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:48,407 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:48,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:48,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1997847370, now seen corresponding path program 17 times [2018-11-28 12:10:48,407 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:48,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:48,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:48,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:48,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:48,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:48,497 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:48,506 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:10:48,521 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 12:10:48,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:48,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:48,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:48,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-28 12:10:48,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 12:10:48,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 12:10:48,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-11-28 12:10:48,573 INFO L87 Difference]: Start difference. First operand 607 states and 1348 transitions. Second operand 17 states. [2018-11-28 12:10:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:48,743 INFO L93 Difference]: Finished difference Result 754 states and 1691 transitions. [2018-11-28 12:10:48,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 12:10:48,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-11-28 12:10:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:48,745 INFO L225 Difference]: With dead ends: 754 [2018-11-28 12:10:48,745 INFO L226 Difference]: Without dead ends: 623 [2018-11-28 12:10:48,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2018-11-28 12:10:48,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2018-11-28 12:10:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 444. [2018-11-28 12:10:48,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-11-28 12:10:48,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1022 transitions. [2018-11-28 12:10:48,750 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1022 transitions. Word has length 65 [2018-11-28 12:10:48,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:48,751 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1022 transitions. [2018-11-28 12:10:48,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 12:10:48,751 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1022 transitions. [2018-11-28 12:10:48,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-28 12:10:48,752 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:48,752 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:48,752 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:48,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:48,752 INFO L82 PathProgramCache]: Analyzing trace with hash 420269130, now seen corresponding path program 18 times [2018-11-28 12:10:48,752 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:48,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:48,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:48,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:48,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:48,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:48,863 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:48,875 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:10:48,897 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-11-28 12:10:48,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:48,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:49,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:49,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-28 12:10:49,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 12:10:49,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 12:10:49,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-11-28 12:10:49,022 INFO L87 Difference]: Start difference. First operand 444 states and 1022 transitions. Second operand 17 states. [2018-11-28 12:10:49,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:49,215 INFO L93 Difference]: Finished difference Result 770 states and 1723 transitions. [2018-11-28 12:10:49,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 12:10:49,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-11-28 12:10:49,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:49,218 INFO L225 Difference]: With dead ends: 770 [2018-11-28 12:10:49,218 INFO L226 Difference]: Without dead ends: 639 [2018-11-28 12:10:49,218 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=608, Unknown=0, NotChecked=0, Total=870 [2018-11-28 12:10:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-11-28 12:10:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2018-11-28 12:10:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2018-11-28 12:10:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1412 transitions. [2018-11-28 12:10:49,224 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1412 transitions. Word has length 65 [2018-11-28 12:10:49,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:49,225 INFO L480 AbstractCegarLoop]: Abstraction has 639 states and 1412 transitions. [2018-11-28 12:10:49,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 12:10:49,225 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1412 transitions. [2018-11-28 12:10:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-28 12:10:49,226 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:49,226 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:49,226 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:49,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:49,227 INFO L82 PathProgramCache]: Analyzing trace with hash 690225639, now seen corresponding path program 19 times [2018-11-28 12:10:49,227 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:49,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:49,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:49,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:49,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:49,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:49,335 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:49,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:49,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:49,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:49,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-28 12:10:49,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 12:10:49,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 12:10:49,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-11-28 12:10:49,425 INFO L87 Difference]: Start difference. First operand 639 states and 1412 transitions. Second operand 18 states. [2018-11-28 12:10:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:49,605 INFO L93 Difference]: Finished difference Result 786 states and 1755 transitions. [2018-11-28 12:10:49,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 12:10:49,605 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-11-28 12:10:49,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:49,606 INFO L225 Difference]: With dead ends: 786 [2018-11-28 12:10:49,606 INFO L226 Difference]: Without dead ends: 655 [2018-11-28 12:10:49,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2018-11-28 12:10:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2018-11-28 12:10:49,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 460. [2018-11-28 12:10:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-11-28 12:10:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1054 transitions. [2018-11-28 12:10:49,611 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1054 transitions. Word has length 69 [2018-11-28 12:10:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:49,611 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 1054 transitions. [2018-11-28 12:10:49,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 12:10:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1054 transitions. [2018-11-28 12:10:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-28 12:10:49,612 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:49,612 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:49,612 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:49,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:49,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1657792755, now seen corresponding path program 20 times [2018-11-28 12:10:49,613 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:49,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:49,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:49,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:49,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:49,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:49,751 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:49,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:10:49,783 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:10:49,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:49,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:49,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:49,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-28 12:10:49,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 12:10:49,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 12:10:49,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-11-28 12:10:49,845 INFO L87 Difference]: Start difference. First operand 460 states and 1054 transitions. Second operand 18 states. [2018-11-28 12:10:50,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:50,021 INFO L93 Difference]: Finished difference Result 802 states and 1787 transitions. [2018-11-28 12:10:50,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 12:10:50,022 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-11-28 12:10:50,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:50,023 INFO L225 Difference]: With dead ends: 802 [2018-11-28 12:10:50,023 INFO L226 Difference]: Without dead ends: 671 [2018-11-28 12:10:50,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2018-11-28 12:10:50,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2018-11-28 12:10:50,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2018-11-28 12:10:50,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2018-11-28 12:10:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1476 transitions. [2018-11-28 12:10:50,029 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1476 transitions. Word has length 69 [2018-11-28 12:10:50,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:50,029 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1476 transitions. [2018-11-28 12:10:50,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 12:10:50,029 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1476 transitions. [2018-11-28 12:10:50,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 12:10:50,030 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:50,030 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:50,030 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:50,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:50,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1119275478, now seen corresponding path program 21 times [2018-11-28 12:10:50,030 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:50,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:50,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:50,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:50,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:50,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:50,143 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:50,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:10:50,172 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-28 12:10:50,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:50,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:50,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:50,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-28 12:10:50,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 12:10:50,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 12:10:50,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-11-28 12:10:50,212 INFO L87 Difference]: Start difference. First operand 671 states and 1476 transitions. Second operand 19 states. [2018-11-28 12:10:50,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:50,407 INFO L93 Difference]: Finished difference Result 818 states and 1819 transitions. [2018-11-28 12:10:50,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 12:10:50,407 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-11-28 12:10:50,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:50,408 INFO L225 Difference]: With dead ends: 818 [2018-11-28 12:10:50,408 INFO L226 Difference]: Without dead ends: 687 [2018-11-28 12:10:50,409 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2018-11-28 12:10:50,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-11-28 12:10:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 476. [2018-11-28 12:10:50,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2018-11-28 12:10:50,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1086 transitions. [2018-11-28 12:10:50,413 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1086 transitions. Word has length 73 [2018-11-28 12:10:50,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:50,413 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1086 transitions. [2018-11-28 12:10:50,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 12:10:50,414 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1086 transitions. [2018-11-28 12:10:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 12:10:50,414 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:50,414 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:50,414 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:50,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:50,415 INFO L82 PathProgramCache]: Analyzing trace with hash -690633686, now seen corresponding path program 22 times [2018-11-28 12:10:50,415 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:50,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:50,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:50,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:50,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:50,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:50,529 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:50,538 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:10:50,556 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:10:50,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:50,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:50,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:50,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-28 12:10:50,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 12:10:50,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 12:10:50,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-11-28 12:10:50,610 INFO L87 Difference]: Start difference. First operand 476 states and 1086 transitions. Second operand 19 states. [2018-11-28 12:10:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:50,824 INFO L93 Difference]: Finished difference Result 834 states and 1851 transitions. [2018-11-28 12:10:50,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 12:10:50,825 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-11-28 12:10:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:50,826 INFO L225 Difference]: With dead ends: 834 [2018-11-28 12:10:50,826 INFO L226 Difference]: Without dead ends: 703 [2018-11-28 12:10:50,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2018-11-28 12:10:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2018-11-28 12:10:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2018-11-28 12:10:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2018-11-28 12:10:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1540 transitions. [2018-11-28 12:10:50,831 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1540 transitions. Word has length 73 [2018-11-28 12:10:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:50,831 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1540 transitions. [2018-11-28 12:10:50,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 12:10:50,831 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1540 transitions. [2018-11-28 12:10:50,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-28 12:10:50,832 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:50,832 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:50,832 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:50,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:50,833 INFO L82 PathProgramCache]: Analyzing trace with hash -119534393, now seen corresponding path program 23 times [2018-11-28 12:10:50,833 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:50,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:50,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:50,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:50,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:50,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:50,952 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:50,962 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:10:50,981 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-11-28 12:10:50,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:50,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:51,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:51,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-28 12:10:51,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 12:10:51,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 12:10:51,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-11-28 12:10:51,054 INFO L87 Difference]: Start difference. First operand 703 states and 1540 transitions. Second operand 20 states. [2018-11-28 12:10:51,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:51,276 INFO L93 Difference]: Finished difference Result 850 states and 1883 transitions. [2018-11-28 12:10:51,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-28 12:10:51,276 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-11-28 12:10:51,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:51,278 INFO L225 Difference]: With dead ends: 850 [2018-11-28 12:10:51,278 INFO L226 Difference]: Without dead ends: 719 [2018-11-28 12:10:51,279 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 12:10:51,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2018-11-28 12:10:51,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 492. [2018-11-28 12:10:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2018-11-28 12:10:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1118 transitions. [2018-11-28 12:10:51,284 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1118 transitions. Word has length 77 [2018-11-28 12:10:51,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:51,284 INFO L480 AbstractCegarLoop]: Abstraction has 492 states and 1118 transitions. [2018-11-28 12:10:51,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 12:10:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1118 transitions. [2018-11-28 12:10:51,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-28 12:10:51,285 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:51,285 INFO L402 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:51,285 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:51,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:51,285 INFO L82 PathProgramCache]: Analyzing trace with hash -604365075, now seen corresponding path program 24 times [2018-11-28 12:10:51,285 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:51,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:51,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:51,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:51,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:51,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:51,399 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:51,407 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:10:51,428 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-11-28 12:10:51,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:51,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:51,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:51,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-28 12:10:51,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 12:10:51,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 12:10:51,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-11-28 12:10:51,468 INFO L87 Difference]: Start difference. First operand 492 states and 1118 transitions. Second operand 20 states. [2018-11-28 12:10:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:51,673 INFO L93 Difference]: Finished difference Result 866 states and 1915 transitions. [2018-11-28 12:10:51,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-28 12:10:51,674 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-11-28 12:10:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:51,675 INFO L225 Difference]: With dead ends: 866 [2018-11-28 12:10:51,675 INFO L226 Difference]: Without dead ends: 735 [2018-11-28 12:10:51,676 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 12:10:51,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-11-28 12:10:51,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2018-11-28 12:10:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2018-11-28 12:10:51,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1604 transitions. [2018-11-28 12:10:51,682 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1604 transitions. Word has length 77 [2018-11-28 12:10:51,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:51,682 INFO L480 AbstractCegarLoop]: Abstraction has 735 states and 1604 transitions. [2018-11-28 12:10:51,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 12:10:51,682 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1604 transitions. [2018-11-28 12:10:51,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-28 12:10:51,682 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:51,682 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:51,683 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:51,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:51,683 INFO L82 PathProgramCache]: Analyzing trace with hash -398143222, now seen corresponding path program 25 times [2018-11-28 12:10:51,683 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:51,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:51,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:51,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:51,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:51,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:51,845 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:51,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:51,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:51,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:51,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-28 12:10:51,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 12:10:51,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 12:10:51,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-11-28 12:10:51,904 INFO L87 Difference]: Start difference. First operand 735 states and 1604 transitions. Second operand 21 states. [2018-11-28 12:10:52,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:52,129 INFO L93 Difference]: Finished difference Result 882 states and 1947 transitions. [2018-11-28 12:10:52,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 12:10:52,129 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-11-28 12:10:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:52,131 INFO L225 Difference]: With dead ends: 882 [2018-11-28 12:10:52,131 INFO L226 Difference]: Without dead ends: 751 [2018-11-28 12:10:52,132 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=969, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 12:10:52,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2018-11-28 12:10:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 508. [2018-11-28 12:10:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-11-28 12:10:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1150 transitions. [2018-11-28 12:10:52,137 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1150 transitions. Word has length 81 [2018-11-28 12:10:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:52,137 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 1150 transitions. [2018-11-28 12:10:52,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 12:10:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1150 transitions. [2018-11-28 12:10:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-28 12:10:52,138 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:52,138 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:52,138 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:52,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:52,139 INFO L82 PathProgramCache]: Analyzing trace with hash 261676042, now seen corresponding path program 26 times [2018-11-28 12:10:52,139 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:52,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:52,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:52,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:52,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:52,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:52,267 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:52,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:10:52,307 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:10:52,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:52,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:52,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:52,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-28 12:10:52,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 12:10:52,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 12:10:52,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-11-28 12:10:52,347 INFO L87 Difference]: Start difference. First operand 508 states and 1150 transitions. Second operand 21 states. [2018-11-28 12:10:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:52,580 INFO L93 Difference]: Finished difference Result 898 states and 1979 transitions. [2018-11-28 12:10:52,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 12:10:52,580 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-11-28 12:10:52,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:52,582 INFO L225 Difference]: With dead ends: 898 [2018-11-28 12:10:52,582 INFO L226 Difference]: Without dead ends: 767 [2018-11-28 12:10:52,583 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=424, Invalid=982, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 12:10:52,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2018-11-28 12:10:52,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2018-11-28 12:10:52,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2018-11-28 12:10:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1668 transitions. [2018-11-28 12:10:52,589 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1668 transitions. Word has length 81 [2018-11-28 12:10:52,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:52,589 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 1668 transitions. [2018-11-28 12:10:52,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 12:10:52,589 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1668 transitions. [2018-11-28 12:10:52,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-28 12:10:52,590 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:52,590 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:52,590 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:52,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:52,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1261226073, now seen corresponding path program 27 times [2018-11-28 12:10:52,590 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:52,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:52,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:52,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:52,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:52,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:52,731 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:52,739 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:10:52,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-28 12:10:52,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:52,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:52,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:52,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-28 12:10:52,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 12:10:52,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 12:10:52,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-11-28 12:10:52,797 INFO L87 Difference]: Start difference. First operand 767 states and 1668 transitions. Second operand 22 states. [2018-11-28 12:10:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:53,044 INFO L93 Difference]: Finished difference Result 914 states and 2011 transitions. [2018-11-28 12:10:53,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 12:10:53,044 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-11-28 12:10:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:53,046 INFO L225 Difference]: With dead ends: 914 [2018-11-28 12:10:53,046 INFO L226 Difference]: Without dead ends: 783 [2018-11-28 12:10:53,047 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=470, Invalid=1090, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 12:10:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-11-28 12:10:53,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 524. [2018-11-28 12:10:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2018-11-28 12:10:53,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1182 transitions. [2018-11-28 12:10:53,052 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1182 transitions. Word has length 85 [2018-11-28 12:10:53,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:53,052 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1182 transitions. [2018-11-28 12:10:53,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 12:10:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1182 transitions. [2018-11-28 12:10:53,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-28 12:10:53,052 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:53,053 INFO L402 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:53,053 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:53,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:53,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1269712589, now seen corresponding path program 28 times [2018-11-28 12:10:53,053 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:53,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:53,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:53,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:53,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:53,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:53,204 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:53,213 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:10:53,231 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:10:53,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:53,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:53,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:53,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-28 12:10:53,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 12:10:53,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 12:10:53,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-11-28 12:10:53,281 INFO L87 Difference]: Start difference. First operand 524 states and 1182 transitions. Second operand 22 states. [2018-11-28 12:10:53,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:53,529 INFO L93 Difference]: Finished difference Result 930 states and 2043 transitions. [2018-11-28 12:10:53,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 12:10:53,529 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-11-28 12:10:53,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:53,531 INFO L225 Difference]: With dead ends: 930 [2018-11-28 12:10:53,532 INFO L226 Difference]: Without dead ends: 799 [2018-11-28 12:10:53,532 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=450, Invalid=1032, Unknown=0, NotChecked=0, Total=1482 [2018-11-28 12:10:53,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2018-11-28 12:10:53,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 799. [2018-11-28 12:10:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2018-11-28 12:10:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1732 transitions. [2018-11-28 12:10:53,539 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1732 transitions. Word has length 85 [2018-11-28 12:10:53,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:53,539 INFO L480 AbstractCegarLoop]: Abstraction has 799 states and 1732 transitions. [2018-11-28 12:10:53,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 12:10:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1732 transitions. [2018-11-28 12:10:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-28 12:10:53,540 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:53,540 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:53,541 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:53,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:53,541 INFO L82 PathProgramCache]: Analyzing trace with hash -823686166, now seen corresponding path program 29 times [2018-11-28 12:10:53,541 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:53,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:53,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:53,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:53,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:53,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:53,705 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:53,714 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:10:53,737 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-28 12:10:53,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:53,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:53,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:53,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-28 12:10:53,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-28 12:10:53,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-28 12:10:53,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-11-28 12:10:53,787 INFO L87 Difference]: Start difference. First operand 799 states and 1732 transitions. Second operand 23 states. [2018-11-28 12:10:54,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:54,104 INFO L93 Difference]: Finished difference Result 946 states and 2075 transitions. [2018-11-28 12:10:54,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-28 12:10:54,105 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-11-28 12:10:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:54,108 INFO L225 Difference]: With dead ends: 946 [2018-11-28 12:10:54,108 INFO L226 Difference]: Without dead ends: 815 [2018-11-28 12:10:54,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=535, Invalid=1187, Unknown=0, NotChecked=0, Total=1722 [2018-11-28 12:10:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2018-11-28 12:10:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 540. [2018-11-28 12:10:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2018-11-28 12:10:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1214 transitions. [2018-11-28 12:10:54,122 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1214 transitions. Word has length 89 [2018-11-28 12:10:54,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:54,122 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1214 transitions. [2018-11-28 12:10:54,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-28 12:10:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1214 transitions. [2018-11-28 12:10:54,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-28 12:10:54,123 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:54,123 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:54,123 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:54,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:54,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1221192726, now seen corresponding path program 30 times [2018-11-28 12:10:54,123 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:54,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:54,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:54,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:54,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:54,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:54,361 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:54,371 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:10:54,396 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-11-28 12:10:54,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:54,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:54,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:54,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-28 12:10:54,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-28 12:10:54,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-28 12:10:54,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-11-28 12:10:54,433 INFO L87 Difference]: Start difference. First operand 540 states and 1214 transitions. Second operand 23 states. [2018-11-28 12:10:54,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:54,765 INFO L93 Difference]: Finished difference Result 962 states and 2107 transitions. [2018-11-28 12:10:54,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-28 12:10:54,765 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-11-28 12:10:54,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:54,767 INFO L225 Difference]: With dead ends: 962 [2018-11-28 12:10:54,767 INFO L226 Difference]: Without dead ends: 831 [2018-11-28 12:10:54,768 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2018-11-28 12:10:54,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-11-28 12:10:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 831. [2018-11-28 12:10:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-11-28 12:10:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1796 transitions. [2018-11-28 12:10:54,775 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1796 transitions. Word has length 89 [2018-11-28 12:10:54,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:54,776 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1796 transitions. [2018-11-28 12:10:54,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-28 12:10:54,776 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1796 transitions. [2018-11-28 12:10:54,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-28 12:10:54,776 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:54,776 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:54,777 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:54,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:54,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1008893305, now seen corresponding path program 31 times [2018-11-28 12:10:54,777 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:54,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:54,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:54,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:54,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:54,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:54,927 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:54,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:54,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:54,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:54,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-28 12:10:54,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-28 12:10:54,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-28 12:10:54,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-11-28 12:10:54,998 INFO L87 Difference]: Start difference. First operand 831 states and 1796 transitions. Second operand 24 states. [2018-11-28 12:10:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:55,308 INFO L93 Difference]: Finished difference Result 978 states and 2139 transitions. [2018-11-28 12:10:55,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 12:10:55,310 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-11-28 12:10:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:55,311 INFO L225 Difference]: With dead ends: 978 [2018-11-28 12:10:55,312 INFO L226 Difference]: Without dead ends: 847 [2018-11-28 12:10:55,312 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=571, Invalid=1321, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 12:10:55,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2018-11-28 12:10:55,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 556. [2018-11-28 12:10:55,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-11-28 12:10:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1246 transitions. [2018-11-28 12:10:55,321 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1246 transitions. Word has length 93 [2018-11-28 12:10:55,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:55,321 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1246 transitions. [2018-11-28 12:10:55,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-28 12:10:55,321 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1246 transitions. [2018-11-28 12:10:55,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-28 12:10:55,322 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:55,322 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:55,322 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:55,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:55,323 INFO L82 PathProgramCache]: Analyzing trace with hash -265515347, now seen corresponding path program 32 times [2018-11-28 12:10:55,323 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:55,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:55,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:55,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:55,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:55,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:55,474 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:55,484 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:10:55,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:10:55,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:55,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:55,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:55,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-28 12:10:55,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-28 12:10:55,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-28 12:10:55,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-11-28 12:10:55,557 INFO L87 Difference]: Start difference. First operand 556 states and 1246 transitions. Second operand 24 states. [2018-11-28 12:10:55,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:55,861 INFO L93 Difference]: Finished difference Result 994 states and 2171 transitions. [2018-11-28 12:10:55,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 12:10:55,862 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-11-28 12:10:55,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:55,863 INFO L225 Difference]: With dead ends: 994 [2018-11-28 12:10:55,863 INFO L226 Difference]: Without dead ends: 863 [2018-11-28 12:10:55,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=536, Invalid=1356, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 12:10:55,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2018-11-28 12:10:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2018-11-28 12:10:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2018-11-28 12:10:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1860 transitions. [2018-11-28 12:10:55,869 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1860 transitions. Word has length 93 [2018-11-28 12:10:55,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:55,870 INFO L480 AbstractCegarLoop]: Abstraction has 863 states and 1860 transitions. [2018-11-28 12:10:55,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-28 12:10:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1860 transitions. [2018-11-28 12:10:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 12:10:55,870 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:55,870 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:55,870 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:55,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:55,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1745970890, now seen corresponding path program 33 times [2018-11-28 12:10:55,871 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:55,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:55,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:55,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:55,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:56,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:56,059 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:56,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:10:56,100 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-28 12:10:56,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:56,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:56,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:56,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-11-28 12:10:56,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 12:10:56,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 12:10:56,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2018-11-28 12:10:56,145 INFO L87 Difference]: Start difference. First operand 863 states and 1860 transitions. Second operand 25 states. [2018-11-28 12:10:56,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:56,482 INFO L93 Difference]: Finished difference Result 1010 states and 2203 transitions. [2018-11-28 12:10:56,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 12:10:56,483 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-11-28 12:10:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:56,484 INFO L225 Difference]: With dead ends: 1010 [2018-11-28 12:10:56,484 INFO L226 Difference]: Without dead ends: 879 [2018-11-28 12:10:56,484 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2018-11-28 12:10:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-11-28 12:10:56,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 572. [2018-11-28 12:10:56,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2018-11-28 12:10:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1278 transitions. [2018-11-28 12:10:56,490 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1278 transitions. Word has length 97 [2018-11-28 12:10:56,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:56,490 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1278 transitions. [2018-11-28 12:10:56,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 12:10:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1278 transitions. [2018-11-28 12:10:56,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 12:10:56,491 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:56,491 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:56,492 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:56,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:56,492 INFO L82 PathProgramCache]: Analyzing trace with hash -510825526, now seen corresponding path program 34 times [2018-11-28 12:10:56,492 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:56,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:56,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:56,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:56,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:56,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:56,667 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:56,675 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:10:56,698 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:10:56,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:56,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:56,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:56,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-11-28 12:10:56,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 12:10:56,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 12:10:56,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2018-11-28 12:10:56,745 INFO L87 Difference]: Start difference. First operand 572 states and 1278 transitions. Second operand 25 states. [2018-11-28 12:10:57,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:57,114 INFO L93 Difference]: Finished difference Result 1026 states and 2235 transitions. [2018-11-28 12:10:57,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 12:10:57,116 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-11-28 12:10:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:57,117 INFO L225 Difference]: With dead ends: 1026 [2018-11-28 12:10:57,117 INFO L226 Difference]: Without dead ends: 895 [2018-11-28 12:10:57,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=626, Invalid=1444, Unknown=0, NotChecked=0, Total=2070 [2018-11-28 12:10:57,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2018-11-28 12:10:57,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2018-11-28 12:10:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2018-11-28 12:10:57,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1924 transitions. [2018-11-28 12:10:57,126 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1924 transitions. Word has length 97 [2018-11-28 12:10:57,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:57,126 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1924 transitions. [2018-11-28 12:10:57,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 12:10:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1924 transitions. [2018-11-28 12:10:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-28 12:10:57,127 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:57,128 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:57,128 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:57,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:57,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1394676377, now seen corresponding path program 35 times [2018-11-28 12:10:57,128 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:57,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:57,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:57,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:57,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:57,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:57,306 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:57,317 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:10:57,345 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-11-28 12:10:57,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:57,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:57,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:57,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-11-28 12:10:57,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-28 12:10:57,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-28 12:10:57,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2018-11-28 12:10:57,400 INFO L87 Difference]: Start difference. First operand 895 states and 1924 transitions. Second operand 26 states. [2018-11-28 12:10:57,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:57,760 INFO L93 Difference]: Finished difference Result 1042 states and 2267 transitions. [2018-11-28 12:10:57,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-28 12:10:57,760 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 101 [2018-11-28 12:10:57,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:57,761 INFO L225 Difference]: With dead ends: 1042 [2018-11-28 12:10:57,761 INFO L226 Difference]: Without dead ends: 911 [2018-11-28 12:10:57,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=682, Invalid=1574, Unknown=0, NotChecked=0, Total=2256 [2018-11-28 12:10:57,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2018-11-28 12:10:57,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 588. [2018-11-28 12:10:57,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2018-11-28 12:10:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1310 transitions. [2018-11-28 12:10:57,768 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1310 transitions. Word has length 101 [2018-11-28 12:10:57,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:57,768 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1310 transitions. [2018-11-28 12:10:57,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-28 12:10:57,769 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1310 transitions. [2018-11-28 12:10:57,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-28 12:10:57,769 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:57,769 INFO L402 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:57,769 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:57,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:57,770 INFO L82 PathProgramCache]: Analyzing trace with hash -313198963, now seen corresponding path program 36 times [2018-11-28 12:10:57,770 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:57,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:57,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:57,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:57,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:57,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:57,952 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:57,959 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:10:57,988 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-11-28 12:10:57,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:57,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:58,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:58,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-11-28 12:10:58,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-28 12:10:58,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-28 12:10:58,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2018-11-28 12:10:58,055 INFO L87 Difference]: Start difference. First operand 588 states and 1310 transitions. Second operand 26 states. [2018-11-28 12:10:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:58,428 INFO L93 Difference]: Finished difference Result 1058 states and 2299 transitions. [2018-11-28 12:10:58,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-28 12:10:58,429 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 101 [2018-11-28 12:10:58,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:58,431 INFO L225 Difference]: With dead ends: 1058 [2018-11-28 12:10:58,431 INFO L226 Difference]: Without dead ends: 927 [2018-11-28 12:10:58,432 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=638, Invalid=1618, Unknown=0, NotChecked=0, Total=2256 [2018-11-28 12:10:58,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2018-11-28 12:10:58,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 927. [2018-11-28 12:10:58,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 927 states. [2018-11-28 12:10:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1988 transitions. [2018-11-28 12:10:58,447 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1988 transitions. Word has length 101 [2018-11-28 12:10:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:58,448 INFO L480 AbstractCegarLoop]: Abstraction has 927 states and 1988 transitions. [2018-11-28 12:10:58,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-28 12:10:58,448 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1988 transitions. [2018-11-28 12:10:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-11-28 12:10:58,449 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:58,450 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:58,450 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:58,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:58,450 INFO L82 PathProgramCache]: Analyzing trace with hash -895327830, now seen corresponding path program 37 times [2018-11-28 12:10:58,450 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:58,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:58,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:58,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:58,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:58,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:58,730 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:58,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:58,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:58,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:58,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-11-28 12:10:58,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-28 12:10:58,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-28 12:10:58,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2018-11-28 12:10:58,818 INFO L87 Difference]: Start difference. First operand 927 states and 1988 transitions. Second operand 27 states. [2018-11-28 12:10:59,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:59,197 INFO L93 Difference]: Finished difference Result 1074 states and 2331 transitions. [2018-11-28 12:10:59,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-28 12:10:59,197 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2018-11-28 12:10:59,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:59,199 INFO L225 Difference]: With dead ends: 1074 [2018-11-28 12:10:59,199 INFO L226 Difference]: Without dead ends: 943 [2018-11-28 12:10:59,200 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=761, Invalid=1689, Unknown=0, NotChecked=0, Total=2450 [2018-11-28 12:10:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2018-11-28 12:10:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 604. [2018-11-28 12:10:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-11-28 12:10:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1342 transitions. [2018-11-28 12:10:59,208 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1342 transitions. Word has length 105 [2018-11-28 12:10:59,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:59,208 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 1342 transitions. [2018-11-28 12:10:59,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-28 12:10:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1342 transitions. [2018-11-28 12:10:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-11-28 12:10:59,209 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:59,209 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:59,210 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:59,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:59,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1031871574, now seen corresponding path program 38 times [2018-11-28 12:10:59,210 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:59,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:59,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:59,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:10:59,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:10:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:59,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:10:59,413 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:10:59,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:10:59,448 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:10:59,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:10:59,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:10:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:10:59,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:10:59,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-11-28 12:10:59,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-28 12:10:59,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-28 12:10:59,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2018-11-28 12:10:59,527 INFO L87 Difference]: Start difference. First operand 604 states and 1342 transitions. Second operand 27 states. [2018-11-28 12:10:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:10:59,926 INFO L93 Difference]: Finished difference Result 1090 states and 2363 transitions. [2018-11-28 12:10:59,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-28 12:10:59,926 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2018-11-28 12:10:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:10:59,928 INFO L225 Difference]: With dead ends: 1090 [2018-11-28 12:10:59,929 INFO L226 Difference]: Without dead ends: 959 [2018-11-28 12:10:59,929 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=742, Invalid=1708, Unknown=0, NotChecked=0, Total=2450 [2018-11-28 12:10:59,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2018-11-28 12:10:59,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 959. [2018-11-28 12:10:59,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2018-11-28 12:10:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2052 transitions. [2018-11-28 12:10:59,942 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2052 transitions. Word has length 105 [2018-11-28 12:10:59,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:10:59,942 INFO L480 AbstractCegarLoop]: Abstraction has 959 states and 2052 transitions. [2018-11-28 12:10:59,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-28 12:10:59,942 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2052 transitions. [2018-11-28 12:10:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-28 12:10:59,944 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:10:59,944 INFO L402 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:10:59,944 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:10:59,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:10:59,944 INFO L82 PathProgramCache]: Analyzing trace with hash 381122631, now seen corresponding path program 39 times [2018-11-28 12:10:59,944 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:10:59,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:10:59,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:59,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:10:59,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:10:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:00,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:00,185 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:00,194 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:11:00,225 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-28 12:11:00,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:00,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:00,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:00,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-11-28 12:11:00,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-28 12:11:00,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-28 12:11:00,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2018-11-28 12:11:00,276 INFO L87 Difference]: Start difference. First operand 959 states and 2052 transitions. Second operand 28 states. [2018-11-28 12:11:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:00,752 INFO L93 Difference]: Finished difference Result 1106 states and 2395 transitions. [2018-11-28 12:11:00,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-28 12:11:00,753 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2018-11-28 12:11:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:00,755 INFO L225 Difference]: With dead ends: 1106 [2018-11-28 12:11:00,755 INFO L226 Difference]: Without dead ends: 975 [2018-11-28 12:11:00,756 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=803, Invalid=1849, Unknown=0, NotChecked=0, Total=2652 [2018-11-28 12:11:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2018-11-28 12:11:00,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 620. [2018-11-28 12:11:00,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2018-11-28 12:11:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1374 transitions. [2018-11-28 12:11:00,764 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1374 transitions. Word has length 109 [2018-11-28 12:11:00,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:00,764 INFO L480 AbstractCegarLoop]: Abstraction has 620 states and 1374 transitions. [2018-11-28 12:11:00,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-28 12:11:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1374 transitions. [2018-11-28 12:11:00,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-28 12:11:00,765 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:00,765 INFO L402 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:00,765 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:00,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:00,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2029552019, now seen corresponding path program 40 times [2018-11-28 12:11:00,766 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:00,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:00,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:00,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:00,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:00,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:00,969 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:00,984 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:11:01,013 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:11:01,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:01,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:01,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:01,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-11-28 12:11:01,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-28 12:11:01,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-28 12:11:01,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2018-11-28 12:11:01,071 INFO L87 Difference]: Start difference. First operand 620 states and 1374 transitions. Second operand 28 states. [2018-11-28 12:11:01,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:01,477 INFO L93 Difference]: Finished difference Result 1122 states and 2427 transitions. [2018-11-28 12:11:01,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-28 12:11:01,477 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2018-11-28 12:11:01,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:01,478 INFO L225 Difference]: With dead ends: 1122 [2018-11-28 12:11:01,478 INFO L226 Difference]: Without dead ends: 991 [2018-11-28 12:11:01,479 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=777, Invalid=1773, Unknown=0, NotChecked=0, Total=2550 [2018-11-28 12:11:01,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2018-11-28 12:11:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2018-11-28 12:11:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2018-11-28 12:11:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2116 transitions. [2018-11-28 12:11:01,487 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2116 transitions. Word has length 109 [2018-11-28 12:11:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:01,487 INFO L480 AbstractCegarLoop]: Abstraction has 991 states and 2116 transitions. [2018-11-28 12:11:01,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-28 12:11:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2116 transitions. [2018-11-28 12:11:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-11-28 12:11:01,488 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:01,488 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:01,489 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:01,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:01,489 INFO L82 PathProgramCache]: Analyzing trace with hash 763001994, now seen corresponding path program 41 times [2018-11-28 12:11:01,489 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:01,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:01,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:01,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:01,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:01,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:01,696 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:01,706 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:11:01,737 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-28 12:11:01,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:01,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:01,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:01,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-11-28 12:11:01,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-28 12:11:01,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-28 12:11:01,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2018-11-28 12:11:01,814 INFO L87 Difference]: Start difference. First operand 991 states and 2116 transitions. Second operand 29 states. [2018-11-28 12:11:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:02,430 INFO L93 Difference]: Finished difference Result 1138 states and 2459 transitions. [2018-11-28 12:11:02,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-28 12:11:02,432 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 113 [2018-11-28 12:11:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:02,434 INFO L225 Difference]: With dead ends: 1138 [2018-11-28 12:11:02,434 INFO L226 Difference]: Without dead ends: 1007 [2018-11-28 12:11:02,435 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=889, Invalid=1973, Unknown=0, NotChecked=0, Total=2862 [2018-11-28 12:11:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2018-11-28 12:11:02,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 636. [2018-11-28 12:11:02,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2018-11-28 12:11:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1406 transitions. [2018-11-28 12:11:02,447 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1406 transitions. Word has length 113 [2018-11-28 12:11:02,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:02,447 INFO L480 AbstractCegarLoop]: Abstraction has 636 states and 1406 transitions. [2018-11-28 12:11:02,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-28 12:11:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1406 transitions. [2018-11-28 12:11:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-11-28 12:11:02,452 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:02,452 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:02,452 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:02,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:02,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1377141878, now seen corresponding path program 42 times [2018-11-28 12:11:02,453 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:02,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:02,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:02,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:02,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:02,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:02,773 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:02,787 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:11:02,831 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-11-28 12:11:02,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:02,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:02,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:02,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-11-28 12:11:02,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-28 12:11:02,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-28 12:11:02,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2018-11-28 12:11:02,918 INFO L87 Difference]: Start difference. First operand 636 states and 1406 transitions. Second operand 29 states. [2018-11-28 12:11:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:03,399 INFO L93 Difference]: Finished difference Result 1154 states and 2491 transitions. [2018-11-28 12:11:03,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-28 12:11:03,399 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 113 [2018-11-28 12:11:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:03,400 INFO L225 Difference]: With dead ends: 1154 [2018-11-28 12:11:03,400 INFO L226 Difference]: Without dead ends: 1023 [2018-11-28 12:11:03,401 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2018-11-28 12:11:03,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-11-28 12:11:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1023. [2018-11-28 12:11:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2018-11-28 12:11:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 2180 transitions. [2018-11-28 12:11:03,408 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 2180 transitions. Word has length 113 [2018-11-28 12:11:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:03,409 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 2180 transitions. [2018-11-28 12:11:03,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-28 12:11:03,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 2180 transitions. [2018-11-28 12:11:03,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-28 12:11:03,409 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:03,410 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:03,410 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:03,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:03,410 INFO L82 PathProgramCache]: Analyzing trace with hash -934862041, now seen corresponding path program 43 times [2018-11-28 12:11:03,410 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:03,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:03,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:03,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:03,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:03,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:03,626 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:03,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:11:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:03,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:03,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:03,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-11-28 12:11:03,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-28 12:11:03,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-28 12:11:03,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2018-11-28 12:11:03,698 INFO L87 Difference]: Start difference. First operand 1023 states and 2180 transitions. Second operand 30 states. [2018-11-28 12:11:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:04,124 INFO L93 Difference]: Finished difference Result 1170 states and 2523 transitions. [2018-11-28 12:11:04,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-28 12:11:04,125 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 117 [2018-11-28 12:11:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:04,125 INFO L225 Difference]: With dead ends: 1170 [2018-11-28 12:11:04,126 INFO L226 Difference]: Without dead ends: 1039 [2018-11-28 12:11:04,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=934, Invalid=2146, Unknown=0, NotChecked=0, Total=3080 [2018-11-28 12:11:04,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2018-11-28 12:11:04,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 652. [2018-11-28 12:11:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-11-28 12:11:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1438 transitions. [2018-11-28 12:11:04,133 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1438 transitions. Word has length 117 [2018-11-28 12:11:04,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:04,133 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 1438 transitions. [2018-11-28 12:11:04,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-28 12:11:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1438 transitions. [2018-11-28 12:11:04,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-28 12:11:04,133 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:04,133 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:04,134 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:04,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:04,134 INFO L82 PathProgramCache]: Analyzing trace with hash 556017229, now seen corresponding path program 44 times [2018-11-28 12:11:04,134 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:04,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:04,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:04,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:11:04,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:04,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:04,348 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:04,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:11:04,377 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:11:04,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:04,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:04,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:04,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-11-28 12:11:04,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-28 12:11:04,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-28 12:11:04,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2018-11-28 12:11:04,468 INFO L87 Difference]: Start difference. First operand 652 states and 1438 transitions. Second operand 30 states. [2018-11-28 12:11:04,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:04,869 INFO L93 Difference]: Finished difference Result 1186 states and 2555 transitions. [2018-11-28 12:11:04,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-28 12:11:04,869 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 117 [2018-11-28 12:11:04,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:04,870 INFO L225 Difference]: With dead ends: 1186 [2018-11-28 12:11:04,870 INFO L226 Difference]: Without dead ends: 1055 [2018-11-28 12:11:04,871 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=869, Invalid=2211, Unknown=0, NotChecked=0, Total=3080 [2018-11-28 12:11:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2018-11-28 12:11:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1055. [2018-11-28 12:11:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1055 states. [2018-11-28 12:11:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2244 transitions. [2018-11-28 12:11:04,880 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2244 transitions. Word has length 117 [2018-11-28 12:11:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:04,880 INFO L480 AbstractCegarLoop]: Abstraction has 1055 states and 2244 transitions. [2018-11-28 12:11:04,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-28 12:11:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2244 transitions. [2018-11-28 12:11:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-28 12:11:04,882 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:04,882 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:04,882 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:04,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:04,882 INFO L82 PathProgramCache]: Analyzing trace with hash -411453590, now seen corresponding path program 45 times [2018-11-28 12:11:04,882 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:04,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:04,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:04,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:04,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:05,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:05,113 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:05,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:11:05,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-11-28 12:11:05,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:05,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:05,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:05,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-11-28 12:11:05,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-28 12:11:05,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-28 12:11:05,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2018-11-28 12:11:05,229 INFO L87 Difference]: Start difference. First operand 1055 states and 2244 transitions. Second operand 31 states. [2018-11-28 12:11:05,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:05,654 INFO L93 Difference]: Finished difference Result 1202 states and 2587 transitions. [2018-11-28 12:11:05,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-28 12:11:05,654 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2018-11-28 12:11:05,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:05,655 INFO L225 Difference]: With dead ends: 1202 [2018-11-28 12:11:05,655 INFO L226 Difference]: Without dead ends: 1071 [2018-11-28 12:11:05,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2018-11-28 12:11:05,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2018-11-28 12:11:05,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 668. [2018-11-28 12:11:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2018-11-28 12:11:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1470 transitions. [2018-11-28 12:11:05,662 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1470 transitions. Word has length 121 [2018-11-28 12:11:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:05,662 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1470 transitions. [2018-11-28 12:11:05,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-28 12:11:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1470 transitions. [2018-11-28 12:11:05,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-28 12:11:05,663 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:05,663 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:05,663 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:05,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:05,664 INFO L82 PathProgramCache]: Analyzing trace with hash 397423466, now seen corresponding path program 46 times [2018-11-28 12:11:05,664 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:05,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:05,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:05,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:05,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:05,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:05,876 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:05,885 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:11:05,906 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:11:05,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:05,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:05,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:05,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-11-28 12:11:05,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-28 12:11:05,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-28 12:11:05,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2018-11-28 12:11:05,948 INFO L87 Difference]: Start difference. First operand 668 states and 1470 transitions. Second operand 31 states. [2018-11-28 12:11:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:06,404 INFO L93 Difference]: Finished difference Result 1218 states and 2619 transitions. [2018-11-28 12:11:06,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-28 12:11:06,404 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2018-11-28 12:11:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:06,405 INFO L225 Difference]: With dead ends: 1218 [2018-11-28 12:11:06,405 INFO L226 Difference]: Without dead ends: 1087 [2018-11-28 12:11:06,406 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1004, Invalid=2302, Unknown=0, NotChecked=0, Total=3306 [2018-11-28 12:11:06,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2018-11-28 12:11:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1087. [2018-11-28 12:11:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1087 states. [2018-11-28 12:11:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2308 transitions. [2018-11-28 12:11:06,416 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2308 transitions. Word has length 121 [2018-11-28 12:11:06,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:06,416 INFO L480 AbstractCegarLoop]: Abstraction has 1087 states and 2308 transitions. [2018-11-28 12:11:06,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-28 12:11:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2308 transitions. [2018-11-28 12:11:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-28 12:11:06,417 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:06,417 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:06,418 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:06,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:06,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1469190649, now seen corresponding path program 47 times [2018-11-28 12:11:06,418 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:06,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:06,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:06,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:06,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:06,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:06,682 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:06,691 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:11:06,718 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-11-28 12:11:06,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:06,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:06,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:06,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-11-28 12:11:06,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-28 12:11:06,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-28 12:11:06,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2018-11-28 12:11:06,769 INFO L87 Difference]: Start difference. First operand 1087 states and 2308 transitions. Second operand 32 states. [2018-11-28 12:11:07,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:07,291 INFO L93 Difference]: Finished difference Result 1234 states and 2651 transitions. [2018-11-28 12:11:07,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-28 12:11:07,292 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 125 [2018-11-28 12:11:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:07,292 INFO L225 Difference]: With dead ends: 1234 [2018-11-28 12:11:07,292 INFO L226 Difference]: Without dead ends: 1103 [2018-11-28 12:11:07,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1075, Invalid=2465, Unknown=0, NotChecked=0, Total=3540 [2018-11-28 12:11:07,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2018-11-28 12:11:07,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 684. [2018-11-28 12:11:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2018-11-28 12:11:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1502 transitions. [2018-11-28 12:11:07,299 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1502 transitions. Word has length 125 [2018-11-28 12:11:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:07,299 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1502 transitions. [2018-11-28 12:11:07,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-28 12:11:07,299 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1502 transitions. [2018-11-28 12:11:07,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-28 12:11:07,299 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:07,299 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:07,300 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:07,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:07,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1066069549, now seen corresponding path program 48 times [2018-11-28 12:11:07,300 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:07,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:07,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:07,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:07,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:07,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:07,526 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:07,534 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:11:07,570 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-11-28 12:11:07,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:07,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:07,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:07,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-11-28 12:11:07,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-28 12:11:07,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-28 12:11:07,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2018-11-28 12:11:07,626 INFO L87 Difference]: Start difference. First operand 684 states and 1502 transitions. Second operand 32 states. [2018-11-28 12:11:08,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:08,083 INFO L93 Difference]: Finished difference Result 1250 states and 2683 transitions. [2018-11-28 12:11:08,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-28 12:11:08,083 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 125 [2018-11-28 12:11:08,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:08,084 INFO L225 Difference]: With dead ends: 1250 [2018-11-28 12:11:08,084 INFO L226 Difference]: Without dead ends: 1119 [2018-11-28 12:11:08,085 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=998, Invalid=2542, Unknown=0, NotChecked=0, Total=3540 [2018-11-28 12:11:08,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2018-11-28 12:11:08,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1119. [2018-11-28 12:11:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1119 states. [2018-11-28 12:11:08,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 2372 transitions. [2018-11-28 12:11:08,092 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 2372 transitions. Word has length 125 [2018-11-28 12:11:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:08,093 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 2372 transitions. [2018-11-28 12:11:08,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-28 12:11:08,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 2372 transitions. [2018-11-28 12:11:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-28 12:11:08,094 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:08,094 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:08,094 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:08,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:08,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1870664266, now seen corresponding path program 49 times [2018-11-28 12:11:08,094 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:08,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:08,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:08,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:08,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:08,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:08,327 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:08,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:11:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:08,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:08,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:08,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-11-28 12:11:08,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-28 12:11:08,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-28 12:11:08,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2018-11-28 12:11:08,407 INFO L87 Difference]: Start difference. First operand 1119 states and 2372 transitions. Second operand 33 states. [2018-11-28 12:11:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:08,952 INFO L93 Difference]: Finished difference Result 1266 states and 2715 transitions. [2018-11-28 12:11:08,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-28 12:11:08,952 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 129 [2018-11-28 12:11:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:08,954 INFO L225 Difference]: With dead ends: 1266 [2018-11-28 12:11:08,954 INFO L226 Difference]: Without dead ends: 1135 [2018-11-28 12:11:08,954 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1175, Invalid=2607, Unknown=0, NotChecked=0, Total=3782 [2018-11-28 12:11:08,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2018-11-28 12:11:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 700. [2018-11-28 12:11:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-11-28 12:11:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1534 transitions. [2018-11-28 12:11:08,962 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1534 transitions. Word has length 129 [2018-11-28 12:11:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:08,962 INFO L480 AbstractCegarLoop]: Abstraction has 700 states and 1534 transitions. [2018-11-28 12:11:08,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-28 12:11:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1534 transitions. [2018-11-28 12:11:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-28 12:11:08,963 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:08,963 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:08,964 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:08,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:08,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1817179318, now seen corresponding path program 50 times [2018-11-28 12:11:08,964 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:08,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:08,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:08,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:11:08,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:09,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:09,217 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:09,225 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:11:09,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:11:09,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:09,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:09,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:09,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-11-28 12:11:09,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-28 12:11:09,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-28 12:11:09,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2018-11-28 12:11:09,297 INFO L87 Difference]: Start difference. First operand 700 states and 1534 transitions. Second operand 33 states. [2018-11-28 12:11:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:09,837 INFO L93 Difference]: Finished difference Result 1282 states and 2747 transitions. [2018-11-28 12:11:09,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-28 12:11:09,838 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 129 [2018-11-28 12:11:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:09,839 INFO L225 Difference]: With dead ends: 1282 [2018-11-28 12:11:09,839 INFO L226 Difference]: Without dead ends: 1151 [2018-11-28 12:11:09,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1150, Invalid=2632, Unknown=0, NotChecked=0, Total=3782 [2018-11-28 12:11:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2018-11-28 12:11:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1151. [2018-11-28 12:11:09,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1151 states. [2018-11-28 12:11:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2436 transitions. [2018-11-28 12:11:09,849 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2436 transitions. Word has length 129 [2018-11-28 12:11:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:09,849 INFO L480 AbstractCegarLoop]: Abstraction has 1151 states and 2436 transitions. [2018-11-28 12:11:09,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-28 12:11:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2436 transitions. [2018-11-28 12:11:09,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-28 12:11:09,851 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:09,851 INFO L402 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:09,851 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:09,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:09,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1106519833, now seen corresponding path program 51 times [2018-11-28 12:11:09,852 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:09,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:09,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:09,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:09,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:10,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:10,116 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:10,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:11:10,163 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-11-28 12:11:10,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:10,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:10,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:10,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-11-28 12:11:10,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-28 12:11:10,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-28 12:11:10,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2018-11-28 12:11:10,233 INFO L87 Difference]: Start difference. First operand 1151 states and 2436 transitions. Second operand 34 states. [2018-11-28 12:11:10,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:10,737 INFO L93 Difference]: Finished difference Result 1298 states and 2779 transitions. [2018-11-28 12:11:10,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-28 12:11:10,737 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 133 [2018-11-28 12:11:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:10,738 INFO L225 Difference]: With dead ends: 1298 [2018-11-28 12:11:10,738 INFO L226 Difference]: Without dead ends: 1167 [2018-11-28 12:11:10,738 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1226, Invalid=2806, Unknown=0, NotChecked=0, Total=4032 [2018-11-28 12:11:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2018-11-28 12:11:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 716. [2018-11-28 12:11:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 716 states. [2018-11-28 12:11:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1566 transitions. [2018-11-28 12:11:10,745 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1566 transitions. Word has length 133 [2018-11-28 12:11:10,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:10,745 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1566 transitions. [2018-11-28 12:11:10,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-28 12:11:10,745 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1566 transitions. [2018-11-28 12:11:10,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-28 12:11:10,746 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:10,746 INFO L402 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:10,746 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:10,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:10,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2044996083, now seen corresponding path program 52 times [2018-11-28 12:11:10,746 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:10,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:10,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:10,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:10,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:11,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:11,000 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:11,010 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:11:11,035 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:11:11,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:11,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:11,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:11,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-11-28 12:11:11,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-28 12:11:11,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-28 12:11:11,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2018-11-28 12:11:11,099 INFO L87 Difference]: Start difference. First operand 716 states and 1566 transitions. Second operand 34 states. [2018-11-28 12:11:11,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:11,625 INFO L93 Difference]: Finished difference Result 1314 states and 2811 transitions. [2018-11-28 12:11:11,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-28 12:11:11,626 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 133 [2018-11-28 12:11:11,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:11,627 INFO L225 Difference]: With dead ends: 1314 [2018-11-28 12:11:11,627 INFO L226 Difference]: Without dead ends: 1183 [2018-11-28 12:11:11,627 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1194, Invalid=2712, Unknown=0, NotChecked=0, Total=3906 [2018-11-28 12:11:11,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2018-11-28 12:11:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1183. [2018-11-28 12:11:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1183 states. [2018-11-28 12:11:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 2500 transitions. [2018-11-28 12:11:11,635 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 2500 transitions. Word has length 133 [2018-11-28 12:11:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:11,635 INFO L480 AbstractCegarLoop]: Abstraction has 1183 states and 2500 transitions. [2018-11-28 12:11:11,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-28 12:11:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 2500 transitions. [2018-11-28 12:11:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-11-28 12:11:11,636 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:11,636 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:11,636 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:11,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:11,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1550683434, now seen corresponding path program 53 times [2018-11-28 12:11:11,637 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:11,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:11,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:11,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:11,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:11,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:11,896 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:11,904 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:11:11,934 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-11-28 12:11:11,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:11,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:11,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:11,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-11-28 12:11:11,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-28 12:11:11,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-28 12:11:11,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2018-11-28 12:11:11,984 INFO L87 Difference]: Start difference. First operand 1183 states and 2500 transitions. Second operand 35 states. [2018-11-28 12:11:12,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:12,517 INFO L93 Difference]: Finished difference Result 1330 states and 2843 transitions. [2018-11-28 12:11:12,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-28 12:11:12,518 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 137 [2018-11-28 12:11:12,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:12,519 INFO L225 Difference]: With dead ends: 1330 [2018-11-28 12:11:12,519 INFO L226 Difference]: Without dead ends: 1199 [2018-11-28 12:11:12,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1333, Invalid=2957, Unknown=0, NotChecked=0, Total=4290 [2018-11-28 12:11:12,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2018-11-28 12:11:12,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 732. [2018-11-28 12:11:12,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 732 states. [2018-11-28 12:11:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1598 transitions. [2018-11-28 12:11:12,528 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1598 transitions. Word has length 137 [2018-11-28 12:11:12,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:12,528 INFO L480 AbstractCegarLoop]: Abstraction has 732 states and 1598 transitions. [2018-11-28 12:11:12,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-28 12:11:12,528 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1598 transitions. [2018-11-28 12:11:12,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-11-28 12:11:12,529 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:12,529 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:12,529 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:12,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:12,530 INFO L82 PathProgramCache]: Analyzing trace with hash -708181206, now seen corresponding path program 54 times [2018-11-28 12:11:12,530 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:12,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:12,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:12,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:12,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:12,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:12,812 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:12,823 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:11:12,862 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-11-28 12:11:12,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:12,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:12,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:12,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-11-28 12:11:12,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-28 12:11:12,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-28 12:11:12,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2018-11-28 12:11:12,913 INFO L87 Difference]: Start difference. First operand 732 states and 1598 transitions. Second operand 35 states. [2018-11-28 12:11:13,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:13,565 INFO L93 Difference]: Finished difference Result 1346 states and 2875 transitions. [2018-11-28 12:11:13,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-28 12:11:13,565 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 137 [2018-11-28 12:11:13,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:13,566 INFO L225 Difference]: With dead ends: 1346 [2018-11-28 12:11:13,566 INFO L226 Difference]: Without dead ends: 1215 [2018-11-28 12:11:13,567 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1306, Invalid=2984, Unknown=0, NotChecked=0, Total=4290 [2018-11-28 12:11:13,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2018-11-28 12:11:13,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1215. [2018-11-28 12:11:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1215 states. [2018-11-28 12:11:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2564 transitions. [2018-11-28 12:11:13,578 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2564 transitions. Word has length 137 [2018-11-28 12:11:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:13,578 INFO L480 AbstractCegarLoop]: Abstraction has 1215 states and 2564 transitions. [2018-11-28 12:11:13,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-28 12:11:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2564 transitions. [2018-11-28 12:11:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-11-28 12:11:13,580 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:13,580 INFO L402 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:13,580 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:13,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:13,581 INFO L82 PathProgramCache]: Analyzing trace with hash 805364679, now seen corresponding path program 55 times [2018-11-28 12:11:13,581 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:13,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:13,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:13,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:13,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:13,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:13,872 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:13,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:11:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:13,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:13,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:13,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-11-28 12:11:13,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-28 12:11:13,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-28 12:11:13,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 12:11:13,956 INFO L87 Difference]: Start difference. First operand 1215 states and 2564 transitions. Second operand 36 states. [2018-11-28 12:11:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:14,511 INFO L93 Difference]: Finished difference Result 1362 states and 2907 transitions. [2018-11-28 12:11:14,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-28 12:11:14,511 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 141 [2018-11-28 12:11:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:14,512 INFO L225 Difference]: With dead ends: 1362 [2018-11-28 12:11:14,513 INFO L226 Difference]: Without dead ends: 1231 [2018-11-28 12:11:14,513 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1387, Invalid=3169, Unknown=0, NotChecked=0, Total=4556 [2018-11-28 12:11:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2018-11-28 12:11:14,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 748. [2018-11-28 12:11:14,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-11-28 12:11:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1630 transitions. [2018-11-28 12:11:14,522 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1630 transitions. Word has length 141 [2018-11-28 12:11:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:14,522 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 1630 transitions. [2018-11-28 12:11:14,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-28 12:11:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1630 transitions. [2018-11-28 12:11:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-11-28 12:11:14,523 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:14,523 INFO L402 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:14,523 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:14,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:14,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1195975187, now seen corresponding path program 56 times [2018-11-28 12:11:14,524 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:14,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:14,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:14,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:11:14,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:14,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:14,796 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:14,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:11:14,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:11:14,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:14,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:14,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:14,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-11-28 12:11:14,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-28 12:11:14,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-28 12:11:14,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 12:11:14,875 INFO L87 Difference]: Start difference. First operand 748 states and 1630 transitions. Second operand 36 states. [2018-11-28 12:11:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:15,424 INFO L93 Difference]: Finished difference Result 1378 states and 2939 transitions. [2018-11-28 12:11:15,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-28 12:11:15,425 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 141 [2018-11-28 12:11:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:15,425 INFO L225 Difference]: With dead ends: 1378 [2018-11-28 12:11:15,425 INFO L226 Difference]: Without dead ends: 1247 [2018-11-28 12:11:15,426 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1283, Invalid=3273, Unknown=0, NotChecked=0, Total=4556 [2018-11-28 12:11:15,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2018-11-28 12:11:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1247. [2018-11-28 12:11:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1247 states. [2018-11-28 12:11:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 2628 transitions. [2018-11-28 12:11:15,435 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 2628 transitions. Word has length 141 [2018-11-28 12:11:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:15,435 INFO L480 AbstractCegarLoop]: Abstraction has 1247 states and 2628 transitions. [2018-11-28 12:11:15,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-28 12:11:15,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 2628 transitions. [2018-11-28 12:11:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-28 12:11:15,436 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:15,436 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:15,436 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:15,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:15,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1696737290, now seen corresponding path program 57 times [2018-11-28 12:11:15,437 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:15,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:15,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:15,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:15,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:15,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:15,735 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:15,742 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:11:15,783 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-28 12:11:15,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:15,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:15,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:15,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-11-28 12:11:15,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-28 12:11:15,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-28 12:11:15,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2018-11-28 12:11:15,843 INFO L87 Difference]: Start difference. First operand 1247 states and 2628 transitions. Second operand 37 states. [2018-11-28 12:11:16,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:16,404 INFO L93 Difference]: Finished difference Result 1394 states and 2971 transitions. [2018-11-28 12:11:16,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-28 12:11:16,404 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 145 [2018-11-28 12:11:16,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:16,405 INFO L225 Difference]: With dead ends: 1394 [2018-11-28 12:11:16,405 INFO L226 Difference]: Without dead ends: 1263 [2018-11-28 12:11:16,406 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1350, Invalid=3480, Unknown=0, NotChecked=0, Total=4830 [2018-11-28 12:11:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2018-11-28 12:11:16,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 764. [2018-11-28 12:11:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2018-11-28 12:11:16,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1662 transitions. [2018-11-28 12:11:16,416 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1662 transitions. Word has length 145 [2018-11-28 12:11:16,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:16,416 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 1662 transitions. [2018-11-28 12:11:16,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-28 12:11:16,416 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1662 transitions. [2018-11-28 12:11:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-11-28 12:11:16,417 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:16,418 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:16,418 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:16,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:16,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1310844150, now seen corresponding path program 58 times [2018-11-28 12:11:16,418 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:16,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:16,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:16,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:16,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:16,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:16,760 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:16,771 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:11:16,800 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:11:16,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:16,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:16,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:16,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-11-28 12:11:16,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-28 12:11:16,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-28 12:11:16,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1018, Unknown=0, NotChecked=0, Total=1332 [2018-11-28 12:11:16,878 INFO L87 Difference]: Start difference. First operand 764 states and 1662 transitions. Second operand 37 states. [2018-11-28 12:11:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:17,494 INFO L93 Difference]: Finished difference Result 1410 states and 3003 transitions. [2018-11-28 12:11:17,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-28 12:11:17,495 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 145 [2018-11-28 12:11:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:17,496 INFO L225 Difference]: With dead ends: 1410 [2018-11-28 12:11:17,496 INFO L226 Difference]: Without dead ends: 1279 [2018-11-28 12:11:17,496 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1472, Invalid=3358, Unknown=0, NotChecked=0, Total=4830 [2018-11-28 12:11:17,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2018-11-28 12:11:17,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2018-11-28 12:11:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2018-11-28 12:11:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 2692 transitions. [2018-11-28 12:11:17,506 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 2692 transitions. Word has length 145 [2018-11-28 12:11:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:17,506 INFO L480 AbstractCegarLoop]: Abstraction has 1279 states and 2692 transitions. [2018-11-28 12:11:17,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-28 12:11:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 2692 transitions. [2018-11-28 12:11:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-11-28 12:11:17,507 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:17,507 INFO L402 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:17,508 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:17,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:17,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1160580775, now seen corresponding path program 59 times [2018-11-28 12:11:17,508 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:17,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:17,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:17,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:17,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:17,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:17,856 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:17,864 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:11:17,913 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-11-28 12:11:17,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:17,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:18,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:18,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-11-28 12:11:18,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-28 12:11:18,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-28 12:11:18,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 12:11:18,009 INFO L87 Difference]: Start difference. First operand 1279 states and 2692 transitions. Second operand 38 states. [2018-11-28 12:11:18,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:18,647 INFO L93 Difference]: Finished difference Result 1426 states and 3035 transitions. [2018-11-28 12:11:18,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-28 12:11:18,647 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 149 [2018-11-28 12:11:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:18,648 INFO L225 Difference]: With dead ends: 1426 [2018-11-28 12:11:18,648 INFO L226 Difference]: Without dead ends: 1295 [2018-11-28 12:11:18,648 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1558, Invalid=3554, Unknown=0, NotChecked=0, Total=5112 [2018-11-28 12:11:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2018-11-28 12:11:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 780. [2018-11-28 12:11:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-11-28 12:11:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1694 transitions. [2018-11-28 12:11:18,656 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1694 transitions. Word has length 149 [2018-11-28 12:11:18,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:18,657 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 1694 transitions. [2018-11-28 12:11:18,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-28 12:11:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1694 transitions. [2018-11-28 12:11:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-11-28 12:11:18,657 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:18,658 INFO L402 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:18,658 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:18,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:18,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1153694259, now seen corresponding path program 60 times [2018-11-28 12:11:18,658 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:18,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:18,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:18,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:18,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:18,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:18,975 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:18,984 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:11:19,027 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-11-28 12:11:19,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:19,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:19,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:19,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-11-28 12:11:19,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-28 12:11:19,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-28 12:11:19,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 12:11:19,090 INFO L87 Difference]: Start difference. First operand 780 states and 1694 transitions. Second operand 38 states. [2018-11-28 12:11:19,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:19,742 INFO L93 Difference]: Finished difference Result 1442 states and 3067 transitions. [2018-11-28 12:11:19,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-28 12:11:19,742 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 149 [2018-11-28 12:11:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:19,744 INFO L225 Difference]: With dead ends: 1442 [2018-11-28 12:11:19,744 INFO L226 Difference]: Without dead ends: 1311 [2018-11-28 12:11:19,744 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1439, Invalid=3673, Unknown=0, NotChecked=0, Total=5112 [2018-11-28 12:11:19,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2018-11-28 12:11:19,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1311. [2018-11-28 12:11:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1311 states. [2018-11-28 12:11:19,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 2756 transitions. [2018-11-28 12:11:19,755 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 2756 transitions. Word has length 149 [2018-11-28 12:11:19,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:19,755 INFO L480 AbstractCegarLoop]: Abstraction has 1311 states and 2756 transitions. [2018-11-28 12:11:19,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-28 12:11:19,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 2756 transitions. [2018-11-28 12:11:19,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-11-28 12:11:19,757 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:19,757 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:19,757 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:19,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:19,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1618862826, now seen corresponding path program 61 times [2018-11-28 12:11:19,758 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:19,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:19,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:19,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:19,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:20,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:20,105 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:20,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:11:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:20,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:20,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:20,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-11-28 12:11:20,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-28 12:11:20,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-28 12:11:20,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2018-11-28 12:11:20,208 INFO L87 Difference]: Start difference. First operand 1311 states and 2756 transitions. Second operand 39 states. [2018-11-28 12:11:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:20,858 INFO L93 Difference]: Finished difference Result 1458 states and 3099 transitions. [2018-11-28 12:11:20,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-28 12:11:20,859 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 153 [2018-11-28 12:11:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:20,860 INFO L225 Difference]: With dead ends: 1458 [2018-11-28 12:11:20,860 INFO L226 Difference]: Without dead ends: 1327 [2018-11-28 12:11:20,860 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1679, Invalid=3723, Unknown=0, NotChecked=0, Total=5402 [2018-11-28 12:11:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2018-11-28 12:11:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 796. [2018-11-28 12:11:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2018-11-28 12:11:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1726 transitions. [2018-11-28 12:11:20,868 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1726 transitions. Word has length 153 [2018-11-28 12:11:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:20,868 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 1726 transitions. [2018-11-28 12:11:20,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-28 12:11:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1726 transitions. [2018-11-28 12:11:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-11-28 12:11:20,869 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:20,869 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:20,869 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:20,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:20,869 INFO L82 PathProgramCache]: Analyzing trace with hash 466375402, now seen corresponding path program 62 times [2018-11-28 12:11:20,869 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:20,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:20,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:20,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:11:20,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:21,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:21,195 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:21,204 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:11:21,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:11:21,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:21,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:21,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:21,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-11-28 12:11:21,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-28 12:11:21,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-28 12:11:21,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2018-11-28 12:11:21,284 INFO L87 Difference]: Start difference. First operand 796 states and 1726 transitions. Second operand 39 states. [2018-11-28 12:11:21,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:21,968 INFO L93 Difference]: Finished difference Result 1474 states and 3131 transitions. [2018-11-28 12:11:21,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-28 12:11:21,968 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 153 [2018-11-28 12:11:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:21,969 INFO L225 Difference]: With dead ends: 1474 [2018-11-28 12:11:21,969 INFO L226 Difference]: Without dead ends: 1343 [2018-11-28 12:11:21,969 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1648, Invalid=3754, Unknown=0, NotChecked=0, Total=5402 [2018-11-28 12:11:21,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2018-11-28 12:11:21,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1343. [2018-11-28 12:11:21,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1343 states. [2018-11-28 12:11:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2820 transitions. [2018-11-28 12:11:21,983 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2820 transitions. Word has length 153 [2018-11-28 12:11:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:21,983 INFO L480 AbstractCegarLoop]: Abstraction has 1343 states and 2820 transitions. [2018-11-28 12:11:21,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-28 12:11:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2820 transitions. [2018-11-28 12:11:21,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-28 12:11:21,985 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:21,985 INFO L402 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:21,985 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:21,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:21,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1685084551, now seen corresponding path program 63 times [2018-11-28 12:11:21,986 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:21,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:21,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:21,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:21,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:22,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:22,350 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:22,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:11:22,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-11-28 12:11:22,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:22,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:22,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:22,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-11-28 12:11:22,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-28 12:11:22,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-28 12:11:22,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 12:11:22,474 INFO L87 Difference]: Start difference. First operand 1343 states and 2820 transitions. Second operand 40 states. [2018-11-28 12:11:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:23,146 INFO L93 Difference]: Finished difference Result 1490 states and 3163 transitions. [2018-11-28 12:11:23,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-28 12:11:23,146 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 157 [2018-11-28 12:11:23,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:23,147 INFO L225 Difference]: With dead ends: 1490 [2018-11-28 12:11:23,147 INFO L226 Difference]: Without dead ends: 1359 [2018-11-28 12:11:23,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1739, Invalid=3961, Unknown=0, NotChecked=0, Total=5700 [2018-11-28 12:11:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2018-11-28 12:11:23,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 812. [2018-11-28 12:11:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2018-11-28 12:11:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1758 transitions. [2018-11-28 12:11:23,155 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1758 transitions. Word has length 157 [2018-11-28 12:11:23,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:23,155 INFO L480 AbstractCegarLoop]: Abstraction has 812 states and 1758 transitions. [2018-11-28 12:11:23,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-28 12:11:23,155 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1758 transitions. [2018-11-28 12:11:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-11-28 12:11:23,156 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:23,156 INFO L402 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:23,156 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:23,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:23,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1853141587, now seen corresponding path program 64 times [2018-11-28 12:11:23,157 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:23,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:23,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:23,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:23,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:23,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:23,501 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:23,511 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:11:23,535 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:11:23,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:23,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:23,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:23,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-11-28 12:11:23,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-28 12:11:23,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-28 12:11:23,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 12:11:23,585 INFO L87 Difference]: Start difference. First operand 812 states and 1758 transitions. Second operand 40 states. [2018-11-28 12:11:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:24,241 INFO L93 Difference]: Finished difference Result 1506 states and 3195 transitions. [2018-11-28 12:11:24,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-28 12:11:24,241 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 157 [2018-11-28 12:11:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:24,242 INFO L225 Difference]: With dead ends: 1506 [2018-11-28 12:11:24,242 INFO L226 Difference]: Without dead ends: 1375 [2018-11-28 12:11:24,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1701, Invalid=3849, Unknown=0, NotChecked=0, Total=5550 [2018-11-28 12:11:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2018-11-28 12:11:24,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1375. [2018-11-28 12:11:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1375 states. [2018-11-28 12:11:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 2884 transitions. [2018-11-28 12:11:24,251 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 2884 transitions. Word has length 157 [2018-11-28 12:11:24,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:24,251 INFO L480 AbstractCegarLoop]: Abstraction has 1375 states and 2884 transitions. [2018-11-28 12:11:24,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-28 12:11:24,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 2884 transitions. [2018-11-28 12:11:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-11-28 12:11:24,252 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:24,252 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:24,253 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:24,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:24,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1163967946, now seen corresponding path program 65 times [2018-11-28 12:11:24,253 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:24,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:24,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:24,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:24,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:24,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:24,587 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:24,594 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:11:24,627 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-28 12:11:24,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:24,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:24,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:24,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-11-28 12:11:24,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-28 12:11:24,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-28 12:11:24,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1252, Unknown=0, NotChecked=0, Total=1640 [2018-11-28 12:11:24,706 INFO L87 Difference]: Start difference. First operand 1375 states and 2884 transitions. Second operand 41 states. [2018-11-28 12:11:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:25,386 INFO L93 Difference]: Finished difference Result 1522 states and 3227 transitions. [2018-11-28 12:11:25,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-28 12:11:25,387 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 161 [2018-11-28 12:11:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:25,388 INFO L225 Difference]: With dead ends: 1522 [2018-11-28 12:11:25,388 INFO L226 Difference]: Without dead ends: 1391 [2018-11-28 12:11:25,388 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1867, Invalid=4139, Unknown=0, NotChecked=0, Total=6006 [2018-11-28 12:11:25,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2018-11-28 12:11:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 828. [2018-11-28 12:11:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2018-11-28 12:11:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1790 transitions. [2018-11-28 12:11:25,396 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1790 transitions. Word has length 161 [2018-11-28 12:11:25,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:25,396 INFO L480 AbstractCegarLoop]: Abstraction has 828 states and 1790 transitions. [2018-11-28 12:11:25,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-28 12:11:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1790 transitions. [2018-11-28 12:11:25,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-11-28 12:11:25,397 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:25,397 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:25,397 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:25,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:25,397 INFO L82 PathProgramCache]: Analyzing trace with hash 661957322, now seen corresponding path program 66 times [2018-11-28 12:11:25,397 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:25,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:25,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:25,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:25,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:25,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:25,738 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:25,750 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:11:25,798 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-11-28 12:11:25,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:25,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:25,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:25,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-11-28 12:11:25,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-28 12:11:25,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-28 12:11:25,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1252, Unknown=0, NotChecked=0, Total=1640 [2018-11-28 12:11:25,855 INFO L87 Difference]: Start difference. First operand 828 states and 1790 transitions. Second operand 41 states. [2018-11-28 12:11:26,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:26,586 INFO L93 Difference]: Finished difference Result 1538 states and 3259 transitions. [2018-11-28 12:11:26,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-28 12:11:26,586 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 161 [2018-11-28 12:11:26,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:26,587 INFO L225 Difference]: With dead ends: 1538 [2018-11-28 12:11:26,587 INFO L226 Difference]: Without dead ends: 1407 [2018-11-28 12:11:26,588 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1834, Invalid=4172, Unknown=0, NotChecked=0, Total=6006 [2018-11-28 12:11:26,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2018-11-28 12:11:26,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1407. [2018-11-28 12:11:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1407 states. [2018-11-28 12:11:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 2948 transitions. [2018-11-28 12:11:26,600 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 2948 transitions. Word has length 161 [2018-11-28 12:11:26,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:26,600 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 2948 transitions. [2018-11-28 12:11:26,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-28 12:11:26,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 2948 transitions. [2018-11-28 12:11:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-11-28 12:11:26,602 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:26,602 INFO L402 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:26,602 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:26,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:26,603 INFO L82 PathProgramCache]: Analyzing trace with hash 346735719, now seen corresponding path program 67 times [2018-11-28 12:11:26,603 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:26,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:26,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:26,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:26,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:26,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:26,987 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:26,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:11:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:27,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:27,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:27,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-11-28 12:11:27,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-28 12:11:27,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-28 12:11:27,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2018-11-28 12:11:27,087 INFO L87 Difference]: Start difference. First operand 1407 states and 2948 transitions. Second operand 42 states. [2018-11-28 12:11:27,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:27,826 INFO L93 Difference]: Finished difference Result 1554 states and 3291 transitions. [2018-11-28 12:11:27,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-28 12:11:27,827 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 165 [2018-11-28 12:11:27,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:27,828 INFO L225 Difference]: With dead ends: 1554 [2018-11-28 12:11:27,828 INFO L226 Difference]: Without dead ends: 1423 [2018-11-28 12:11:27,828 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1930, Invalid=4390, Unknown=0, NotChecked=0, Total=6320 [2018-11-28 12:11:27,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2018-11-28 12:11:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 844. [2018-11-28 12:11:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2018-11-28 12:11:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1822 transitions. [2018-11-28 12:11:27,836 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1822 transitions. Word has length 165 [2018-11-28 12:11:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:27,836 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 1822 transitions. [2018-11-28 12:11:27,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-28 12:11:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1822 transitions. [2018-11-28 12:11:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-11-28 12:11:27,837 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:27,837 INFO L402 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:27,838 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:27,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:27,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1602532749, now seen corresponding path program 68 times [2018-11-28 12:11:27,838 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:27,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:27,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:27,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:11:27,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:28,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:28,204 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:28,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:11:28,243 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:11:28,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:28,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:28,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:28,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-11-28 12:11:28,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-28 12:11:28,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-28 12:11:28,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2018-11-28 12:11:28,309 INFO L87 Difference]: Start difference. First operand 844 states and 1822 transitions. Second operand 42 states. [2018-11-28 12:11:29,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:29,018 INFO L93 Difference]: Finished difference Result 1570 states and 3323 transitions. [2018-11-28 12:11:29,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-28 12:11:29,019 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 165 [2018-11-28 12:11:29,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:29,020 INFO L225 Difference]: With dead ends: 1570 [2018-11-28 12:11:29,020 INFO L226 Difference]: Without dead ends: 1439 [2018-11-28 12:11:29,020 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1778, Invalid=4542, Unknown=0, NotChecked=0, Total=6320 [2018-11-28 12:11:29,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2018-11-28 12:11:29,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1439. [2018-11-28 12:11:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1439 states. [2018-11-28 12:11:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 3012 transitions. [2018-11-28 12:11:29,030 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 3012 transitions. Word has length 165 [2018-11-28 12:11:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:29,031 INFO L480 AbstractCegarLoop]: Abstraction has 1439 states and 3012 transitions. [2018-11-28 12:11:29,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-28 12:11:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 3012 transitions. [2018-11-28 12:11:29,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-28 12:11:29,032 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:29,032 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:29,032 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:29,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:29,032 INFO L82 PathProgramCache]: Analyzing trace with hash 715831466, now seen corresponding path program 69 times [2018-11-28 12:11:29,032 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:29,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:29,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:29,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:29,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:29,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:29,442 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:29,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:11:29,518 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-11-28 12:11:29,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:29,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:29,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:29,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-11-28 12:11:29,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-28 12:11:29,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-28 12:11:29,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2018-11-28 12:11:29,594 INFO L87 Difference]: Start difference. First operand 1439 states and 3012 transitions. Second operand 43 states. [2018-11-28 12:11:30,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:30,324 INFO L93 Difference]: Finished difference Result 1586 states and 3355 transitions. [2018-11-28 12:11:30,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-28 12:11:30,324 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 169 [2018-11-28 12:11:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:30,325 INFO L225 Difference]: With dead ends: 1586 [2018-11-28 12:11:30,325 INFO L226 Difference]: Without dead ends: 1455 [2018-11-28 12:11:30,326 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1857, Invalid=4785, Unknown=0, NotChecked=0, Total=6642 [2018-11-28 12:11:30,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2018-11-28 12:11:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 860. [2018-11-28 12:11:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2018-11-28 12:11:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1854 transitions. [2018-11-28 12:11:30,333 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1854 transitions. Word has length 169 [2018-11-28 12:11:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:30,334 INFO L480 AbstractCegarLoop]: Abstraction has 860 states and 1854 transitions. [2018-11-28 12:11:30,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-28 12:11:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1854 transitions. [2018-11-28 12:11:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-28 12:11:30,334 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:30,334 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:30,335 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:30,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:30,335 INFO L82 PathProgramCache]: Analyzing trace with hash 146219690, now seen corresponding path program 70 times [2018-11-28 12:11:30,335 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:30,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:30,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:30,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:30,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:30,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:30,714 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:30,724 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:11:30,752 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:11:30,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:30,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:30,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:30,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-11-28 12:11:30,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-28 12:11:30,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-28 12:11:30,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2018-11-28 12:11:30,807 INFO L87 Difference]: Start difference. First operand 860 states and 1854 transitions. Second operand 43 states. [2018-11-28 12:11:31,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:31,608 INFO L93 Difference]: Finished difference Result 1602 states and 3387 transitions. [2018-11-28 12:11:31,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-28 12:11:31,608 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 169 [2018-11-28 12:11:31,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:31,609 INFO L225 Difference]: With dead ends: 1602 [2018-11-28 12:11:31,610 INFO L226 Difference]: Without dead ends: 1471 [2018-11-28 12:11:31,610 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2030, Invalid=4612, Unknown=0, NotChecked=0, Total=6642 [2018-11-28 12:11:31,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2018-11-28 12:11:31,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1471. [2018-11-28 12:11:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1471 states. [2018-11-28 12:11:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3076 transitions. [2018-11-28 12:11:31,620 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3076 transitions. Word has length 169 [2018-11-28 12:11:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:31,620 INFO L480 AbstractCegarLoop]: Abstraction has 1471 states and 3076 transitions. [2018-11-28 12:11:31,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-28 12:11:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3076 transitions. [2018-11-28 12:11:31,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-28 12:11:31,622 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:31,622 INFO L402 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:31,622 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:31,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:31,622 INFO L82 PathProgramCache]: Analyzing trace with hash -54767801, now seen corresponding path program 71 times [2018-11-28 12:11:31,622 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:31,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:31,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:31,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:31,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:32,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:32,043 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:32,051 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:11:32,090 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-11-28 12:11:32,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:32,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:32,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:32,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-11-28 12:11:32,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-28 12:11:32,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-28 12:11:32,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 12:11:32,146 INFO L87 Difference]: Start difference. First operand 1471 states and 3076 transitions. Second operand 44 states. [2018-11-28 12:11:32,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:32,946 INFO L93 Difference]: Finished difference Result 1618 states and 3419 transitions. [2018-11-28 12:11:32,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-28 12:11:32,946 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 173 [2018-11-28 12:11:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:32,948 INFO L225 Difference]: With dead ends: 1618 [2018-11-28 12:11:32,948 INFO L226 Difference]: Without dead ends: 1487 [2018-11-28 12:11:32,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2131, Invalid=4841, Unknown=0, NotChecked=0, Total=6972 [2018-11-28 12:11:32,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2018-11-28 12:11:32,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 876. [2018-11-28 12:11:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2018-11-28 12:11:32,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1886 transitions. [2018-11-28 12:11:32,958 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1886 transitions. Word has length 173 [2018-11-28 12:11:32,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:32,958 INFO L480 AbstractCegarLoop]: Abstraction has 876 states and 1886 transitions. [2018-11-28 12:11:32,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-28 12:11:32,959 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1886 transitions. [2018-11-28 12:11:32,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-28 12:11:32,960 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:32,960 INFO L402 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:32,960 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:32,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:32,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1762147693, now seen corresponding path program 72 times [2018-11-28 12:11:32,960 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:32,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:32,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:32,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:32,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:33,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:33,448 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:33,457 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:11:33,519 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-11-28 12:11:33,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:33,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:33,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:33,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-11-28 12:11:33,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-28 12:11:33,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-28 12:11:33,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 12:11:33,601 INFO L87 Difference]: Start difference. First operand 876 states and 1886 transitions. Second operand 44 states. [2018-11-28 12:11:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:34,386 INFO L93 Difference]: Finished difference Result 1634 states and 3451 transitions. [2018-11-28 12:11:34,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-28 12:11:34,386 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 173 [2018-11-28 12:11:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:34,387 INFO L225 Difference]: With dead ends: 1634 [2018-11-28 12:11:34,387 INFO L226 Difference]: Without dead ends: 1503 [2018-11-28 12:11:34,388 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1961, Invalid=5011, Unknown=0, NotChecked=0, Total=6972 [2018-11-28 12:11:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2018-11-28 12:11:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1503. [2018-11-28 12:11:34,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1503 states. [2018-11-28 12:11:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3140 transitions. [2018-11-28 12:11:34,398 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3140 transitions. Word has length 173 [2018-11-28 12:11:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:34,398 INFO L480 AbstractCegarLoop]: Abstraction has 1503 states and 3140 transitions. [2018-11-28 12:11:34,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-28 12:11:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3140 transitions. [2018-11-28 12:11:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-28 12:11:34,400 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:34,400 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:34,400 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:34,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:34,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1195103114, now seen corresponding path program 73 times [2018-11-28 12:11:34,400 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:34,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:34,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:34,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:34,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:34,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:34,841 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:34,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:11:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:34,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:34,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:34,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-11-28 12:11:34,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-28 12:11:34,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-28 12:11:34,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2018-11-28 12:11:34,931 INFO L87 Difference]: Start difference. First operand 1503 states and 3140 transitions. Second operand 45 states. [2018-11-28 12:11:35,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:35,791 INFO L93 Difference]: Finished difference Result 1650 states and 3483 transitions. [2018-11-28 12:11:35,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-28 12:11:35,791 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 177 [2018-11-28 12:11:35,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:35,792 INFO L225 Difference]: With dead ends: 1650 [2018-11-28 12:11:35,793 INFO L226 Difference]: Without dead ends: 1519 [2018-11-28 12:11:35,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2273, Invalid=5037, Unknown=0, NotChecked=0, Total=7310 [2018-11-28 12:11:35,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2018-11-28 12:11:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 892. [2018-11-28 12:11:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2018-11-28 12:11:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1918 transitions. [2018-11-28 12:11:35,801 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1918 transitions. Word has length 177 [2018-11-28 12:11:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:35,801 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 1918 transitions. [2018-11-28 12:11:35,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-28 12:11:35,802 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1918 transitions. [2018-11-28 12:11:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-28 12:11:35,802 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:35,802 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:35,803 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:35,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:35,803 INFO L82 PathProgramCache]: Analyzing trace with hash 326351498, now seen corresponding path program 74 times [2018-11-28 12:11:35,803 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:35,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:35,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:35,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:11:35,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:36,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:36,226 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:36,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:11:36,268 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:11:36,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:36,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:36,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:11:36,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-11-28 12:11:36,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-28 12:11:36,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-28 12:11:36,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2018-11-28 12:11:36,328 INFO L87 Difference]: Start difference. First operand 892 states and 1918 transitions. Second operand 45 states. [2018-11-28 12:11:37,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:37,223 INFO L93 Difference]: Finished difference Result 1666 states and 3515 transitions. [2018-11-28 12:11:37,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-28 12:11:37,223 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 177 [2018-11-28 12:11:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:37,224 INFO L225 Difference]: With dead ends: 1666 [2018-11-28 12:11:37,224 INFO L226 Difference]: Without dead ends: 1535 [2018-11-28 12:11:37,224 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2236, Invalid=5074, Unknown=0, NotChecked=0, Total=7310 [2018-11-28 12:11:37,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2018-11-28 12:11:37,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1535. [2018-11-28 12:11:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1535 states. [2018-11-28 12:11:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 3204 transitions. [2018-11-28 12:11:37,234 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 3204 transitions. Word has length 177 [2018-11-28 12:11:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:37,234 INFO L480 AbstractCegarLoop]: Abstraction has 1535 states and 3204 transitions. [2018-11-28 12:11:37,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-28 12:11:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 3204 transitions. [2018-11-28 12:11:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-11-28 12:11:37,235 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:37,236 INFO L402 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:37,236 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:37,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:37,236 INFO L82 PathProgramCache]: Analyzing trace with hash -477824473, now seen corresponding path program 75 times [2018-11-28 12:11:37,236 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:37,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:37,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:37,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:37,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1425 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:37,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:37,824 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:37,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:11:37,883 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-11-28 12:11:37,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:37,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1483 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:37,944 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 12:11:37,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [43] imperfect sequences [43] total 45 [2018-11-28 12:11:37,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-28 12:11:37,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-28 12:11:37,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2018-11-28 12:11:37,945 INFO L87 Difference]: Start difference. First operand 1535 states and 3204 transitions. Second operand 45 states. [2018-11-28 12:11:38,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:38,549 INFO L93 Difference]: Finished difference Result 13619 states and 27026 transitions. [2018-11-28 12:11:38,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-11-28 12:11:38,550 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 181 [2018-11-28 12:11:38,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:38,551 INFO L225 Difference]: With dead ends: 13619 [2018-11-28 12:11:38,551 INFO L226 Difference]: Without dead ends: 887 [2018-11-28 12:11:38,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2135, Invalid=5005, Unknown=0, NotChecked=0, Total=7140 [2018-11-28 12:11:38,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2018-11-28 12:11:38,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 887. [2018-11-28 12:11:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 887 states. [2018-11-28 12:11:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1797 transitions. [2018-11-28 12:11:38,561 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1797 transitions. Word has length 181 [2018-11-28 12:11:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:38,561 INFO L480 AbstractCegarLoop]: Abstraction has 887 states and 1797 transitions. [2018-11-28 12:11:38,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-28 12:11:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1797 transitions. [2018-11-28 12:11:38,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-11-28 12:11:38,562 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:11:38,562 INFO L402 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:11:38,562 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:11:38,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:11:38,563 INFO L82 PathProgramCache]: Analyzing trace with hash 301327693, now seen corresponding path program 76 times [2018-11-28 12:11:38,563 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:11:38,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:11:38,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:38,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:11:38,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:11:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:11:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1352 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:39,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:11:39,096 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:11:39,106 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:11:39,133 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:11:39,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:11:39,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:11:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 1483 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:11:39,205 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 12:11:39,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [43] imperfect sequences [43] total 45 [2018-11-28 12:11:39,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-28 12:11:39,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-28 12:11:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2018-11-28 12:11:39,206 INFO L87 Difference]: Start difference. First operand 887 states and 1797 transitions. Second operand 45 states. [2018-11-28 12:11:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:11:39,860 INFO L93 Difference]: Finished difference Result 6923 states and 12825 transitions. [2018-11-28 12:11:39,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-11-28 12:11:39,860 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 181 [2018-11-28 12:11:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:11:39,861 INFO L225 Difference]: With dead ends: 6923 [2018-11-28 12:11:39,861 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 12:11:39,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2135, Invalid=5005, Unknown=0, NotChecked=0, Total=7140 [2018-11-28 12:11:39,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 12:11:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 12:11:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 12:11:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 12:11:39,862 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 181 [2018-11-28 12:11:39,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:11:39,862 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 12:11:39,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-28 12:11:39,862 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 12:11:39,862 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 12:11:39,864 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-11-28 12:11:39,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:11:39 BasicIcfg [2018-11-28 12:11:39,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 12:11:39,866 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 12:11:39,866 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 12:11:39,866 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 12:11:39,867 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:10:41" (3/4) ... [2018-11-28 12:11:39,871 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 12:11:39,877 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2018-11-28 12:11:39,877 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2018-11-28 12:11:39,880 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-11-28 12:11:39,880 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-28 12:11:39,880 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 12:11:39,910 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6308efc4-34f5-4647-89d6-940294bbaa5f/bin-2019/uautomizer/witness.graphml [2018-11-28 12:11:39,910 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 12:11:39,910 INFO L168 Benchmark]: Toolchain (without parser) took 58796.19 ms. Allocated memory was 1.0 GB in the beginning and 1.9 GB in the end (delta: 832.0 MB). Free memory was 950.6 MB in the beginning and 819.6 MB in the end (delta: 131.0 MB). Peak memory consumption was 963.1 MB. Max. memory is 11.5 GB. [2018-11-28 12:11:39,911 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:11:39,912 INFO L168 Benchmark]: CACSL2BoogieTranslator took 432.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -190.3 MB). Peak memory consumption was 30.2 MB. Max. memory is 11.5 GB. [2018-11-28 12:11:39,912 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-28 12:11:39,912 INFO L168 Benchmark]: Boogie Preprocessor took 18.28 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:11:39,912 INFO L168 Benchmark]: RCFGBuilder took 252.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 11.5 GB. [2018-11-28 12:11:39,912 INFO L168 Benchmark]: TraceAbstraction took 58007.89 ms. Allocated memory was 1.2 GB in the beginning and 1.9 GB in the end (delta: 671.6 MB). Free memory was 1.1 GB in the beginning and 819.6 MB in the end (delta: 292.5 MB). Peak memory consumption was 964.2 MB. Max. memory is 11.5 GB. [2018-11-28 12:11:39,912 INFO L168 Benchmark]: Witness Printer took 44.09 ms. Allocated memory is still 1.9 GB. Free memory was 819.6 MB in the beginning and 819.6 MB in the end (delta: 24.5 kB). Peak memory consumption was 24.5 kB. Max. memory is 11.5 GB. [2018-11-28 12:11:39,914 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 432.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -190.3 MB). Peak memory consumption was 30.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.28 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 252.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 58007.89 ms. Allocated memory was 1.2 GB in the beginning and 1.9 GB in the end (delta: 671.6 MB). Free memory was 1.1 GB in the beginning and 819.6 MB in the end (delta: 292.5 MB). Peak memory consumption was 964.2 MB. Max. memory is 11.5 GB. * Witness Printer took 44.09 ms. Allocated memory is still 1.9 GB. Free memory was 819.6 MB in the beginning and 819.6 MB in the end (delta: 24.5 kB). Peak memory consumption was 24.5 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 688]: 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 5 procedures, 64 locations, 1 error locations. SAFE Result, 57.9s OverallTime, 82 OverallIterations, 21 TraceHistogramMax, 31.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5164 SDtfs, 39724 SDslu, 50023 SDs, 0 SdLazy, 9832 SolverSat, 7470 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12027 GetRequests, 8276 SyntacticMatches, 0 SemanticMatches, 3751 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41070 ImplicationChecksByTransitivity, 40.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1535occurred in iteration=80, 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: 0.6s AutomataMinimizationTime, 82 MinimizatonAttempts, 12588 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 19.2s InterpolantComputationTime, 16471 NumberOfCodeBlocks, 16471 NumberOfCodeBlocksAsserted, 578 NumberOfCheckSat, 16311 ConstructedInterpolants, 0 QuantifiedInterpolants, 6018555 SizeOfPredicates, 1944 NumberOfNonLiveVariables, 18564 ConjunctsInSsa, 2192 ConjunctsInUnsatCore, 160 InterpolantComputations, 6 PerfectInterpolantSequences, 5743/79120 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...