./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer_false-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_757e1496-3e06-45a2-8a46-ae10d184fd75/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 5c411f7a0e92322da42b7e0fe2dbd9719b462a69 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 11:35:45,541 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 11:35:45,542 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 11:35:45,549 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 11:35:45,550 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 11:35:45,550 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 11:35:45,551 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 11:35:45,552 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 11:35:45,553 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 11:35:45,554 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 11:35:45,554 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 11:35:45,554 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 11:35:45,555 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 11:35:45,556 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 11:35:45,557 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 11:35:45,557 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 11:35:45,558 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 11:35:45,559 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 11:35:45,560 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 11:35:45,561 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 11:35:45,562 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 11:35:45,563 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 11:35:45,564 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 11:35:45,565 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 11:35:45,565 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 11:35:45,565 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 11:35:45,566 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 11:35:45,567 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 11:35:45,567 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 11:35:45,568 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 11:35:45,568 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 11:35:45,568 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 11:35:45,569 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 11:35:45,569 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 11:35:45,569 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 11:35:45,570 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 11:35:45,570 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 11:35:45,580 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 11:35:45,580 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 11:35:45,581 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 11:35:45,581 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 11:35:45,581 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 11:35:45,581 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 11:35:45,581 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 11:35:45,582 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 11:35:45,582 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 11:35:45,582 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 11:35:45,582 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 11:35:45,582 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 11:35:45,582 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 11:35:45,582 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 11:35:45,583 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 11:35:45,583 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 11:35:45,583 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 11:35:45,583 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 11:35:45,583 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 11:35:45,583 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 11:35:45,583 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 11:35:45,584 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 11:35:45,584 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 11:35:45,584 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 11:35:45,584 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 11:35:45,584 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 11:35:45,584 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 11:35:45,584 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 11:35:45,585 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 11:35:45,585 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 11:35:45,585 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_757e1496-3e06-45a2-8a46-ae10d184fd75/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 -> 5c411f7a0e92322da42b7e0fe2dbd9719b462a69 [2018-11-28 11:35:45,606 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 11:35:45,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 11:35:45,615 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 11:35:45,616 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 11:35:45,616 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 11:35:45,617 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/bin-2019/uautomizer/../../sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i [2018-11-28 11:35:45,653 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/bin-2019/uautomizer/data/548af85a8/36795eb83f7447f8b9cc6427d9f7f9a8/FLAG572175e46 [2018-11-28 11:35:46,032 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 11:35:46,033 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i [2018-11-28 11:35:46,039 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/bin-2019/uautomizer/data/548af85a8/36795eb83f7447f8b9cc6427d9f7f9a8/FLAG572175e46 [2018-11-28 11:35:46,413 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/bin-2019/uautomizer/data/548af85a8/36795eb83f7447f8b9cc6427d9f7f9a8 [2018-11-28 11:35:46,415 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 11:35:46,416 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 11:35:46,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 11:35:46,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 11:35:46,419 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 11:35:46,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:35:46" (1/1) ... [2018-11-28 11:35:46,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3711ebb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:35:46, skipping insertion in model container [2018-11-28 11:35:46,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:35:46" (1/1) ... [2018-11-28 11:35:46,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 11:35:46,450 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 11:35:46,649 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:35:46,656 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 11:35:46,728 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:35:46,759 INFO L195 MainTranslator]: Completed translation [2018-11-28 11:35:46,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:35:46 WrapperNode [2018-11-28 11:35:46,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 11:35:46,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 11:35:46,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 11:35:46,760 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 11:35:46,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:35:46" (1/1) ... [2018-11-28 11:35:46,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:35:46" (1/1) ... [2018-11-28 11:35:46,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 11:35:46,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 11:35:46,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 11:35:46,787 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 11:35:46,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:35:46" (1/1) ... [2018-11-28 11:35:46,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:35:46" (1/1) ... [2018-11-28 11:35:46,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:35:46" (1/1) ... [2018-11-28 11:35:46,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:35:46" (1/1) ... [2018-11-28 11:35:46,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:35:46" (1/1) ... [2018-11-28 11:35:46,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:35:46" (1/1) ... [2018-11-28 11:35:46,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:35:46" (1/1) ... [2018-11-28 11:35:46,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 11:35:46,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 11:35:46,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 11:35:46,806 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 11:35:46,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:35:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:46,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 11:35:46,842 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-11-28 11:35:46,842 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-11-28 11:35:46,842 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-11-28 11:35:46,842 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-11-28 11:35:46,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 11:35:46,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-11-28 11:35:46,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 11:35:46,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-11-28 11:35:46,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 11:35:46,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 11:35:46,844 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 11:35:47,022 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 11:35:47,022 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-28 11:35:47,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:35:47 BoogieIcfgContainer [2018-11-28 11:35:47,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 11:35:47,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 11:35:47,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 11:35:47,026 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 11:35:47,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:35:46" (1/3) ... [2018-11-28 11:35:47,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488d656f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:35:47, skipping insertion in model container [2018-11-28 11:35:47,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:35:46" (2/3) ... [2018-11-28 11:35:47,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488d656f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:35:47, skipping insertion in model container [2018-11-28 11:35:47,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:35:47" (3/3) ... [2018-11-28 11:35:47,029 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer_false-unreach-call.i [2018-11-28 11:35:47,050 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,050 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,050 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,051 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,051 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,051 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,051 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,051 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,051 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,052 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,052 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,052 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,052 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,052 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,053 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,053 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,053 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,053 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,053 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,053 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,053 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,054 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,054 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,054 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,054 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,054 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,054 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,054 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 11:35:47,060 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-11-28 11:35:47,060 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 11:35:47,065 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 11:35:47,073 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 11:35:47,091 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 11:35:47,091 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 11:35:47,091 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 11:35:47,092 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 11:35:47,092 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 11:35:47,092 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 11:35:47,092 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 11:35:47,092 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 11:35:47,092 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 11:35:47,097 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-11-28 11:35:47,137 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-11-28 11:35:47,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-11-28 11:35:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 11:35:47,146 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:47,147 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 11:35:47,148 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:47,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:47,153 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-11-28 11:35:47,154 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:47,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:47,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:47,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:47,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:47,322 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 11:35:47,323 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:35:47,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 11:35:47,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 11:35:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 11:35:47,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 11:35:47,336 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-11-28 11:35:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:47,436 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-11-28 11:35:47,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 11:35:47,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-28 11:35:47,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:47,448 INFO L225 Difference]: With dead ends: 1411 [2018-11-28 11:35:47,449 INFO L226 Difference]: Without dead ends: 322 [2018-11-28 11:35:47,450 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 11:35:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-11-28 11:35:47,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-11-28 11:35:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-28 11:35:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-11-28 11:35:47,490 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-11-28 11:35:47,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:47,490 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-11-28 11:35:47,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 11:35:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-11-28 11:35:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-28 11:35:47,491 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:47,491 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 11:35:47,492 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:47,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:47,492 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-11-28 11:35:47,492 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:47,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:47,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:47,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:47,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:47,549 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 11:35:47,550 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:35:47,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 11:35:47,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 11:35:47,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 11:35:47,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 11:35:47,551 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-11-28 11:35:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:47,577 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-11-28 11:35:47,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 11:35:47,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-28 11:35:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:47,579 INFO L225 Difference]: With dead ends: 411 [2018-11-28 11:35:47,579 INFO L226 Difference]: Without dead ends: 290 [2018-11-28 11:35:47,580 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 11:35:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-11-28 11:35:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-11-28 11:35:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-11-28 11:35:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-11-28 11:35:47,592 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-11-28 11:35:47,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:47,592 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-11-28 11:35:47,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 11:35:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-11-28 11:35:47,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 11:35:47,593 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:47,593 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 11:35:47,594 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:47,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:47,595 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-11-28 11:35:47,595 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:47,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:47,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:47,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:47,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:47,664 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 11:35:47,665 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:35:47,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 11:35:47,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 11:35:47,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 11:35:47,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 11:35:47,665 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-11-28 11:35:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:47,715 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-11-28 11:35:47,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 11:35:47,716 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-28 11:35:47,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:47,717 INFO L225 Difference]: With dead ends: 437 [2018-11-28 11:35:47,717 INFO L226 Difference]: Without dead ends: 309 [2018-11-28 11:35:47,718 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 11:35:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-11-28 11:35:47,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-11-28 11:35:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-11-28 11:35:47,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-11-28 11:35:47,728 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-11-28 11:35:47,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:47,729 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-11-28 11:35:47,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 11:35:47,729 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-11-28 11:35:47,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 11:35:47,731 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:47,731 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 11:35:47,731 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:47,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:47,731 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-11-28 11:35:47,731 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:47,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:47,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:47,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:47,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:47,788 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 11:35:47,788 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:35:47,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 11:35:47,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 11:35:47,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 11:35:47,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 11:35:47,789 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-11-28 11:35:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:47,842 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-11-28 11:35:47,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 11:35:47,843 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-28 11:35:47,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:47,845 INFO L225 Difference]: With dead ends: 456 [2018-11-28 11:35:47,845 INFO L226 Difference]: Without dead ends: 319 [2018-11-28 11:35:47,845 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 11:35:47,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-11-28 11:35:47,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-11-28 11:35:47,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-11-28 11:35:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-11-28 11:35:47,855 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-11-28 11:35:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:47,856 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-11-28 11:35:47,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 11:35:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-11-28 11:35:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 11:35:47,857 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:47,857 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 11:35:47,857 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:47,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:47,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-11-28 11:35:47,858 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:47,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:47,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:47,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:47,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:47,927 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 11:35:47,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:47,928 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:47,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:47,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:48,003 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 11:35:48,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:48,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 11:35:48,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 11:35:48,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 11:35:48,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 11:35:48,019 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-11-28 11:35:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:48,119 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-11-28 11:35:48,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 11:35:48,120 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-28 11:35:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:48,122 INFO L225 Difference]: With dead ends: 466 [2018-11-28 11:35:48,122 INFO L226 Difference]: Without dead ends: 335 [2018-11-28 11:35:48,122 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-11-28 11:35:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-11-28 11:35:48,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2018-11-28 11:35:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-11-28 11:35:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 734 transitions. [2018-11-28 11:35:48,131 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 734 transitions. Word has length 29 [2018-11-28 11:35:48,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:48,131 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 734 transitions. [2018-11-28 11:35:48,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 11:35:48,132 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 734 transitions. [2018-11-28 11:35:48,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 11:35:48,133 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:48,133 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 11:35:48,133 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:48,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:48,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-11-28 11:35:48,133 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:48,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:48,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:48,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:48,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:48,203 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 11:35:48,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:48,204 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:48,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:48,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:48,251 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 11:35:48,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:48,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 11:35:48,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 11:35:48,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 11:35:48,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 11:35:48,275 INFO L87 Difference]: Start difference. First operand 300 states and 734 transitions. Second operand 8 states. [2018-11-28 11:35:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:48,350 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-11-28 11:35:48,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 11:35:48,350 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-28 11:35:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:48,351 INFO L225 Difference]: With dead ends: 482 [2018-11-28 11:35:48,352 INFO L226 Difference]: Without dead ends: 351 [2018-11-28 11:35:48,352 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 11:35:48,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-11-28 11:35:48,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-11-28 11:35:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-11-28 11:35:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-11-28 11:35:48,361 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-11-28 11:35:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:48,361 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-11-28 11:35:48,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 11:35:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-11-28 11:35:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-28 11:35:48,363 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:48,363 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 11:35:48,363 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:48,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:48,363 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 1 times [2018-11-28 11:35:48,364 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:48,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:48,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:48,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:48,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:48,437 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 11:35:48,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:48,437 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:48,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:48,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:48,494 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 11:35:48,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:48,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 11:35:48,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 11:35:48,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 11:35:48,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-28 11:35:48,510 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-11-28 11:35:48,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:48,585 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-11-28 11:35:48,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 11:35:48,585 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-28 11:35:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:48,586 INFO L225 Difference]: With dead ends: 498 [2018-11-28 11:35:48,586 INFO L226 Difference]: Without dead ends: 367 [2018-11-28 11:35:48,586 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-28 11:35:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-11-28 11:35:48,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 316. [2018-11-28 11:35:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-11-28 11:35:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 766 transitions. [2018-11-28 11:35:48,591 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 766 transitions. Word has length 33 [2018-11-28 11:35:48,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:48,591 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 766 transitions. [2018-11-28 11:35:48,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 11:35:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 766 transitions. [2018-11-28 11:35:48,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-28 11:35:48,591 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:48,591 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 11:35:48,592 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:48,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:48,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1110322378, now seen corresponding path program 2 times [2018-11-28 11:35:48,592 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:48,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:48,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:48,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:48,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:48,646 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 11:35:48,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:48,647 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:48,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:35:48,675 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:35:48,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:48,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:48,726 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 11:35:48,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:48,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 11:35:48,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 11:35:48,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 11:35:48,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-28 11:35:48,742 INFO L87 Difference]: Start difference. First operand 316 states and 766 transitions. Second operand 9 states. [2018-11-28 11:35:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:48,829 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-11-28 11:35:48,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 11:35:48,829 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-28 11:35:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:48,830 INFO L225 Difference]: With dead ends: 514 [2018-11-28 11:35:48,830 INFO L226 Difference]: Without dead ends: 383 [2018-11-28 11:35:48,831 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 11:35:48,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-11-28 11:35:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-11-28 11:35:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-11-28 11:35:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-11-28 11:35:48,839 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-11-28 11:35:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:48,839 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-11-28 11:35:48,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 11:35:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-11-28 11:35:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 11:35:48,840 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:48,840 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 11:35:48,840 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:48,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:48,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 3 times [2018-11-28 11:35:48,841 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:48,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:48,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:48,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:48,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:48,907 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 11:35:48,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:48,908 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:48,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 11:35:48,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-28 11:35:48,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:48,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:48,972 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 11:35:48,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:48,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 11:35:48,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 11:35:48,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 11:35:48,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-28 11:35:48,987 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-11-28 11:35:49,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:49,053 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-11-28 11:35:49,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 11:35:49,054 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-28 11:35:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:49,055 INFO L225 Difference]: With dead ends: 530 [2018-11-28 11:35:49,055 INFO L226 Difference]: Without dead ends: 399 [2018-11-28 11:35:49,056 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 11:35:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-11-28 11:35:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 332. [2018-11-28 11:35:49,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-11-28 11:35:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 798 transitions. [2018-11-28 11:35:49,062 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 798 transitions. Word has length 37 [2018-11-28 11:35:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:49,062 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 798 transitions. [2018-11-28 11:35:49,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 11:35:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 798 transitions. [2018-11-28 11:35:49,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 11:35:49,063 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:49,063 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 11:35:49,063 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:49,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:49,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1649592435, now seen corresponding path program 4 times [2018-11-28 11:35:49,064 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:49,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:49,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:49,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:49,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:49,127 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 11:35:49,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:49,127 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:49,137 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 11:35:49,148 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 11:35:49,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:49,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:49,167 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 11:35:49,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:49,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 11:35:49,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 11:35:49,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 11:35:49,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-28 11:35:49,183 INFO L87 Difference]: Start difference. First operand 332 states and 798 transitions. Second operand 10 states. [2018-11-28 11:35:49,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:49,241 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-11-28 11:35:49,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 11:35:49,241 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-28 11:35:49,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:49,242 INFO L225 Difference]: With dead ends: 546 [2018-11-28 11:35:49,242 INFO L226 Difference]: Without dead ends: 415 [2018-11-28 11:35:49,243 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 11:35:49,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-11-28 11:35:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-11-28 11:35:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-11-28 11:35:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-11-28 11:35:49,248 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-11-28 11:35:49,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:49,248 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-11-28 11:35:49,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 11:35:49,249 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-11-28 11:35:49,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 11:35:49,249 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:49,249 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 11:35:49,250 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:49,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:49,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 5 times [2018-11-28 11:35:49,250 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:49,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:49,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:49,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:49,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:49,319 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 11:35:49,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:49,319 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:49,328 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 11:35:49,338 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-11-28 11:35:49,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:49,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:49,353 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 11:35:49,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:49,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 11:35:49,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 11:35:49,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 11:35:49,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 11:35:49,368 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-11-28 11:35:49,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:49,466 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-11-28 11:35:49,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 11:35:49,466 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-28 11:35:49,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:49,467 INFO L225 Difference]: With dead ends: 562 [2018-11-28 11:35:49,467 INFO L226 Difference]: Without dead ends: 431 [2018-11-28 11:35:49,468 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 11:35:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-11-28 11:35:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 348. [2018-11-28 11:35:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-11-28 11:35:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 830 transitions. [2018-11-28 11:35:49,472 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 830 transitions. Word has length 41 [2018-11-28 11:35:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:49,472 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 830 transitions. [2018-11-28 11:35:49,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 11:35:49,473 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 830 transitions. [2018-11-28 11:35:49,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 11:35:49,473 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:49,473 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 11:35:49,473 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:49,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:49,474 INFO L82 PathProgramCache]: Analyzing trace with hash 449750186, now seen corresponding path program 6 times [2018-11-28 11:35:49,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:49,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:49,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:49,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:49,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:49,528 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 11:35:49,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:49,528 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:49,548 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 11:35:49,570 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-11-28 11:35:49,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:49,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:49,607 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 11:35:49,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:49,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 11:35:49,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 11:35:49,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 11:35:49,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 11:35:49,623 INFO L87 Difference]: Start difference. First operand 348 states and 830 transitions. Second operand 11 states. [2018-11-28 11:35:49,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:49,702 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-11-28 11:35:49,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 11:35:49,703 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-28 11:35:49,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:49,704 INFO L225 Difference]: With dead ends: 578 [2018-11-28 11:35:49,704 INFO L226 Difference]: Without dead ends: 447 [2018-11-28 11:35:49,704 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 11:35:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-11-28 11:35:49,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-11-28 11:35:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-11-28 11:35:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-11-28 11:35:49,710 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-11-28 11:35:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:49,710 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-11-28 11:35:49,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 11:35:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-11-28 11:35:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 11:35:49,711 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:49,711 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 11:35:49,711 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:49,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:49,711 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 7 times [2018-11-28 11:35:49,712 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:49,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:49,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:49,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:49,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:49,780 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 11:35:49,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:49,780 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:49,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:49,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:49,835 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 11:35:49,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:49,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 11:35:49,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 11:35:49,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 11:35:49,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-28 11:35:49,850 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-11-28 11:35:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:49,970 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-11-28 11:35:49,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 11:35:49,971 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-28 11:35:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:49,972 INFO L225 Difference]: With dead ends: 594 [2018-11-28 11:35:49,972 INFO L226 Difference]: Without dead ends: 463 [2018-11-28 11:35:49,973 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 11:35:49,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-11-28 11:35:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2018-11-28 11:35:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-11-28 11:35:49,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 862 transitions. [2018-11-28 11:35:49,980 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 862 transitions. Word has length 45 [2018-11-28 11:35:49,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:49,980 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 862 transitions. [2018-11-28 11:35:49,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 11:35:49,980 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 862 transitions. [2018-11-28 11:35:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 11:35:49,981 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:49,981 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 11:35:49,981 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:49,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:49,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1081163923, now seen corresponding path program 8 times [2018-11-28 11:35:49,981 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:49,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:49,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:49,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:49,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:50,057 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 11:35:50,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:50,057 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:50,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:35:50,090 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:35:50,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:50,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:50,117 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 11:35:50,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:50,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 11:35:50,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 11:35:50,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 11:35:50,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-28 11:35:50,136 INFO L87 Difference]: Start difference. First operand 364 states and 862 transitions. Second operand 12 states. [2018-11-28 11:35:50,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:50,256 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-11-28 11:35:50,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 11:35:50,256 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-28 11:35:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:50,258 INFO L225 Difference]: With dead ends: 610 [2018-11-28 11:35:50,258 INFO L226 Difference]: Without dead ends: 479 [2018-11-28 11:35:50,258 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 11:35:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-11-28 11:35:50,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-11-28 11:35:50,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-11-28 11:35:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-11-28 11:35:50,265 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-11-28 11:35:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:50,266 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-11-28 11:35:50,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 11:35:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-11-28 11:35:50,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 11:35:50,266 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:50,266 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 11:35:50,266 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:50,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:50,267 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 9 times [2018-11-28 11:35:50,267 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:50,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:50,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:50,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:50,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:50,349 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 11:35:50,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:50,349 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:50,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 11:35:50,384 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 11:35:50,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:50,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:50,410 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 11:35:50,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:50,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-28 11:35:50,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 11:35:50,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 11:35:50,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-28 11:35:50,426 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-11-28 11:35:50,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:50,548 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-11-28 11:35:50,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 11:35:50,555 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-28 11:35:50,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:50,556 INFO L225 Difference]: With dead ends: 626 [2018-11-28 11:35:50,556 INFO L226 Difference]: Without dead ends: 495 [2018-11-28 11:35:50,557 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 11:35:50,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-11-28 11:35:50,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 380. [2018-11-28 11:35:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-11-28 11:35:50,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 894 transitions. [2018-11-28 11:35:50,563 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 894 transitions. Word has length 49 [2018-11-28 11:35:50,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:50,563 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 894 transitions. [2018-11-28 11:35:50,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 11:35:50,563 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 894 transitions. [2018-11-28 11:35:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 11:35:50,564 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:50,564 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 11:35:50,564 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:50,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:50,564 INFO L82 PathProgramCache]: Analyzing trace with hash -555139958, now seen corresponding path program 10 times [2018-11-28 11:35:50,564 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:50,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:50,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:50,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:50,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:50,657 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 11:35:50,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:50,658 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:50,665 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 11:35:50,676 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 11:35:50,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:50,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:50,705 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 11:35:50,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:50,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-28 11:35:50,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 11:35:50,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 11:35:50,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-28 11:35:50,721 INFO L87 Difference]: Start difference. First operand 380 states and 894 transitions. Second operand 13 states. [2018-11-28 11:35:50,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:50,858 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-11-28 11:35:50,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 11:35:50,859 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-28 11:35:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:50,860 INFO L225 Difference]: With dead ends: 642 [2018-11-28 11:35:50,860 INFO L226 Difference]: Without dead ends: 511 [2018-11-28 11:35:50,860 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 11:35:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-11-28 11:35:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-11-28 11:35:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-11-28 11:35:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-11-28 11:35:50,866 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-11-28 11:35:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:50,867 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-11-28 11:35:50,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 11:35:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-11-28 11:35:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-28 11:35:50,867 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:50,868 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 11:35:50,868 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:50,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 11 times [2018-11-28 11:35:50,868 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:50,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:50,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:50,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:50,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:50,953 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 11:35:50,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:50,954 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:50,967 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 11:35:50,987 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-11-28 11:35:50,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:50,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:51,013 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 11:35:51,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:51,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-28 11:35:51,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 11:35:51,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 11:35:51,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-28 11:35:51,035 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-11-28 11:35:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:51,162 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-11-28 11:35:51,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 11:35:51,162 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-28 11:35:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:51,164 INFO L225 Difference]: With dead ends: 658 [2018-11-28 11:35:51,164 INFO L226 Difference]: Without dead ends: 527 [2018-11-28 11:35:51,164 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 11:35:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-11-28 11:35:51,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2018-11-28 11:35:51,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-11-28 11:35:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2018-11-28 11:35:51,168 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 53 [2018-11-28 11:35:51,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:51,169 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2018-11-28 11:35:51,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 11:35:51,169 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2018-11-28 11:35:51,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-28 11:35:51,169 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:51,170 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 11:35:51,170 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:51,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:51,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1121609549, now seen corresponding path program 12 times [2018-11-28 11:35:51,170 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:51,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:51,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:51,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:51,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:51,228 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 11:35:51,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:51,229 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:51,248 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 11:35:51,286 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-11-28 11:35:51,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:51,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:51,313 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 11:35:51,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:51,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-28 11:35:51,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 11:35:51,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 11:35:51,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-28 11:35:51,329 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2018-11-28 11:35:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:51,454 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-11-28 11:35:51,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 11:35:51,454 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-28 11:35:51,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:51,455 INFO L225 Difference]: With dead ends: 674 [2018-11-28 11:35:51,455 INFO L226 Difference]: Without dead ends: 543 [2018-11-28 11:35:51,455 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 11:35:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-11-28 11:35:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-11-28 11:35:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-11-28 11:35:51,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-11-28 11:35:51,460 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-11-28 11:35:51,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:51,460 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-11-28 11:35:51,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 11:35:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-11-28 11:35:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 11:35:51,461 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:51,461 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 11:35:51,461 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:51,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:51,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 13 times [2018-11-28 11:35:51,461 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:51,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:51,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:51,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:51,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:51,528 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 11:35:51,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:51,528 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:51,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:51,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:51,577 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 11:35:51,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:51,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-28 11:35:51,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 11:35:51,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 11:35:51,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-28 11:35:51,592 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-11-28 11:35:51,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:51,719 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-11-28 11:35:51,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 11:35:51,720 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-28 11:35:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:51,721 INFO L225 Difference]: With dead ends: 690 [2018-11-28 11:35:51,721 INFO L226 Difference]: Without dead ends: 559 [2018-11-28 11:35:51,722 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 11:35:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-11-28 11:35:51,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 412. [2018-11-28 11:35:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-11-28 11:35:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 958 transitions. [2018-11-28 11:35:51,727 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 958 transitions. Word has length 57 [2018-11-28 11:35:51,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:51,727 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 958 transitions. [2018-11-28 11:35:51,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 11:35:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 958 transitions. [2018-11-28 11:35:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 11:35:51,728 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:51,728 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 11:35:51,728 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:51,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:51,729 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 14 times [2018-11-28 11:35:51,729 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:51,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:51,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:51,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:51,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:51,796 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 11:35:51,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:51,796 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:51,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:35:51,816 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:35:51,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:51,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:51,851 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 11:35:51,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:51,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-28 11:35:51,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 11:35:51,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 11:35:51,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-28 11:35:51,866 INFO L87 Difference]: Start difference. First operand 412 states and 958 transitions. Second operand 15 states. [2018-11-28 11:35:52,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:52,000 INFO L93 Difference]: Finished difference Result 706 states and 1595 transitions. [2018-11-28 11:35:52,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 11:35:52,000 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-28 11:35:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:52,002 INFO L225 Difference]: With dead ends: 706 [2018-11-28 11:35:52,002 INFO L226 Difference]: Without dead ends: 575 [2018-11-28 11:35:52,002 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 11:35:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-11-28 11:35:52,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2018-11-28 11:35:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2018-11-28 11:35:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1284 transitions. [2018-11-28 11:35:52,007 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1284 transitions. Word has length 57 [2018-11-28 11:35:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:52,007 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1284 transitions. [2018-11-28 11:35:52,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 11:35:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1284 transitions. [2018-11-28 11:35:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 11:35:52,008 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:52,008 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 11:35:52,008 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:52,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:52,009 INFO L82 PathProgramCache]: Analyzing trace with hash -21031161, now seen corresponding path program 15 times [2018-11-28 11:35:52,009 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:52,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:52,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:52,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:52,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:52,079 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 11:35:52,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:52,079 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:52,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 11:35:52,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-28 11:35:52,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:52,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:52,117 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 11:35:52,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:52,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-28 11:35:52,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 11:35:52,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 11:35:52,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-11-28 11:35:52,133 INFO L87 Difference]: Start difference. First operand 575 states and 1284 transitions. Second operand 16 states. [2018-11-28 11:35:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:52,266 INFO L93 Difference]: Finished difference Result 722 states and 1627 transitions. [2018-11-28 11:35:52,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 11:35:52,266 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-11-28 11:35:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:52,268 INFO L225 Difference]: With dead ends: 722 [2018-11-28 11:35:52,268 INFO L226 Difference]: Without dead ends: 591 [2018-11-28 11:35:52,268 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 11:35:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-11-28 11:35:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 428. [2018-11-28 11:35:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2018-11-28 11:35:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 990 transitions. [2018-11-28 11:35:52,273 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 990 transitions. Word has length 61 [2018-11-28 11:35:52,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:52,273 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 990 transitions. [2018-11-28 11:35:52,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 11:35:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 990 transitions. [2018-11-28 11:35:52,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-28 11:35:52,274 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:52,274 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 11:35:52,274 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:52,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:52,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1418711251, now seen corresponding path program 16 times [2018-11-28 11:35:52,275 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:52,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:52,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:52,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:52,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:52,356 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 11:35:52,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:52,356 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:52,370 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 11:35:52,394 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 11:35:52,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:52,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:52,427 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 11:35:52,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:52,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-28 11:35:52,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 11:35:52,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 11:35:52,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-11-28 11:35:52,442 INFO L87 Difference]: Start difference. First operand 428 states and 990 transitions. Second operand 16 states. [2018-11-28 11:35:52,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:52,575 INFO L93 Difference]: Finished difference Result 738 states and 1659 transitions. [2018-11-28 11:35:52,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 11:35:52,575 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2018-11-28 11:35:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:52,576 INFO L225 Difference]: With dead ends: 738 [2018-11-28 11:35:52,576 INFO L226 Difference]: Without dead ends: 607 [2018-11-28 11:35:52,576 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2018-11-28 11:35:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2018-11-28 11:35:52,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2018-11-28 11:35:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2018-11-28 11:35:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1348 transitions. [2018-11-28 11:35:52,582 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1348 transitions. Word has length 61 [2018-11-28 11:35:52,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:52,582 INFO L480 AbstractCegarLoop]: Abstraction has 607 states and 1348 transitions. [2018-11-28 11:35:52,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 11:35:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1348 transitions. [2018-11-28 11:35:52,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-28 11:35:52,583 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:52,583 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 11:35:52,583 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:52,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:52,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1997847370, now seen corresponding path program 17 times [2018-11-28 11:35:52,584 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:52,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:52,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:52,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:52,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:52,676 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 11:35:52,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:52,676 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:52,683 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 11:35:52,696 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 11:35:52,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:52,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:52,717 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 11:35:52,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:52,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-28 11:35:52,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 11:35:52,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 11:35:52,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-11-28 11:35:52,732 INFO L87 Difference]: Start difference. First operand 607 states and 1348 transitions. Second operand 17 states. [2018-11-28 11:35:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:52,876 INFO L93 Difference]: Finished difference Result 754 states and 1691 transitions. [2018-11-28 11:35:52,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 11:35:52,876 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-11-28 11:35:52,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:52,878 INFO L225 Difference]: With dead ends: 754 [2018-11-28 11:35:52,878 INFO L226 Difference]: Without dead ends: 623 [2018-11-28 11:35:52,878 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2018-11-28 11:35:52,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2018-11-28 11:35:52,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 444. [2018-11-28 11:35:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-11-28 11:35:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1022 transitions. [2018-11-28 11:35:52,883 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1022 transitions. Word has length 65 [2018-11-28 11:35:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:52,883 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1022 transitions. [2018-11-28 11:35:52,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 11:35:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1022 transitions. [2018-11-28 11:35:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-28 11:35:52,884 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:52,884 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 11:35:52,884 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:52,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:52,884 INFO L82 PathProgramCache]: Analyzing trace with hash 420269130, now seen corresponding path program 18 times [2018-11-28 11:35:52,884 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:52,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:52,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:52,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:52,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:52,981 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 11:35:52,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:52,981 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:52,991 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 11:35:53,008 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-11-28 11:35:53,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:53,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:53,024 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 11:35:53,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:53,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-28 11:35:53,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 11:35:53,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 11:35:53,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-11-28 11:35:53,047 INFO L87 Difference]: Start difference. First operand 444 states and 1022 transitions. Second operand 17 states. [2018-11-28 11:35:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:53,231 INFO L93 Difference]: Finished difference Result 770 states and 1723 transitions. [2018-11-28 11:35:53,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-28 11:35:53,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2018-11-28 11:35:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:53,233 INFO L225 Difference]: With dead ends: 770 [2018-11-28 11:35:53,233 INFO L226 Difference]: Without dead ends: 639 [2018-11-28 11:35:53,233 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=608, Unknown=0, NotChecked=0, Total=870 [2018-11-28 11:35:53,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-11-28 11:35:53,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 639. [2018-11-28 11:35:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2018-11-28 11:35:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1412 transitions. [2018-11-28 11:35:53,238 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1412 transitions. Word has length 65 [2018-11-28 11:35:53,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:53,239 INFO L480 AbstractCegarLoop]: Abstraction has 639 states and 1412 transitions. [2018-11-28 11:35:53,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 11:35:53,239 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1412 transitions. [2018-11-28 11:35:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-28 11:35:53,240 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:53,240 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 11:35:53,240 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:53,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash 690225639, now seen corresponding path program 19 times [2018-11-28 11:35:53,240 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:53,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:53,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:53,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:53,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:53,368 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 11:35:53,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:53,368 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:53,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:53,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:53,412 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 11:35:53,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:53,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-28 11:35:53,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 11:35:53,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 11:35:53,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-11-28 11:35:53,428 INFO L87 Difference]: Start difference. First operand 639 states and 1412 transitions. Second operand 18 states. [2018-11-28 11:35:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:53,615 INFO L93 Difference]: Finished difference Result 786 states and 1755 transitions. [2018-11-28 11:35:53,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 11:35:53,615 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-11-28 11:35:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:53,617 INFO L225 Difference]: With dead ends: 786 [2018-11-28 11:35:53,617 INFO L226 Difference]: Without dead ends: 655 [2018-11-28 11:35:53,618 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 11:35:53,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2018-11-28 11:35:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 460. [2018-11-28 11:35:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-11-28 11:35:53,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1054 transitions. [2018-11-28 11:35:53,622 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1054 transitions. Word has length 69 [2018-11-28 11:35:53,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:53,622 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 1054 transitions. [2018-11-28 11:35:53,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 11:35:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1054 transitions. [2018-11-28 11:35:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-28 11:35:53,623 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:53,623 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 11:35:53,623 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:53,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:53,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1657792755, now seen corresponding path program 20 times [2018-11-28 11:35:53,623 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:53,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:53,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:53,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:53,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:53,742 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 11:35:53,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:53,743 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:53,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:35:53,763 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:35:53,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:53,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:53,796 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 11:35:53,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:53,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-28 11:35:53,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 11:35:53,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 11:35:53,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-11-28 11:35:53,811 INFO L87 Difference]: Start difference. First operand 460 states and 1054 transitions. Second operand 18 states. [2018-11-28 11:35:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:53,965 INFO L93 Difference]: Finished difference Result 802 states and 1787 transitions. [2018-11-28 11:35:53,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 11:35:53,966 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2018-11-28 11:35:53,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:53,967 INFO L225 Difference]: With dead ends: 802 [2018-11-28 11:35:53,967 INFO L226 Difference]: Without dead ends: 671 [2018-11-28 11:35:53,968 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 11:35:53,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2018-11-28 11:35:53,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2018-11-28 11:35:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2018-11-28 11:35:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1476 transitions. [2018-11-28 11:35:53,973 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1476 transitions. Word has length 69 [2018-11-28 11:35:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:53,973 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1476 transitions. [2018-11-28 11:35:53,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 11:35:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1476 transitions. [2018-11-28 11:35:53,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 11:35:53,974 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:53,974 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 11:35:53,974 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:53,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:53,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1119275478, now seen corresponding path program 21 times [2018-11-28 11:35:53,974 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:53,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:53,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:53,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:53,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:54,092 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 11:35:54,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:54,092 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:54,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 11:35:54,117 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-28 11:35:54,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:54,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:54,145 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 11:35:54,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:54,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-28 11:35:54,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 11:35:54,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 11:35:54,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-11-28 11:35:54,160 INFO L87 Difference]: Start difference. First operand 671 states and 1476 transitions. Second operand 19 states. [2018-11-28 11:35:54,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:54,333 INFO L93 Difference]: Finished difference Result 818 states and 1819 transitions. [2018-11-28 11:35:54,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 11:35:54,333 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-11-28 11:35:54,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:54,335 INFO L225 Difference]: With dead ends: 818 [2018-11-28 11:35:54,335 INFO L226 Difference]: Without dead ends: 687 [2018-11-28 11:35:54,335 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 11:35:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-11-28 11:35:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 476. [2018-11-28 11:35:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2018-11-28 11:35:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1086 transitions. [2018-11-28 11:35:54,340 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1086 transitions. Word has length 73 [2018-11-28 11:35:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:54,340 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1086 transitions. [2018-11-28 11:35:54,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 11:35:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1086 transitions. [2018-11-28 11:35:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-28 11:35:54,341 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:54,341 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 11:35:54,341 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:54,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:54,341 INFO L82 PathProgramCache]: Analyzing trace with hash -690633686, now seen corresponding path program 22 times [2018-11-28 11:35:54,341 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:54,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:54,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:54,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:54,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:54,447 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 11:35:54,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:54,447 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:54,457 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 11:35:54,471 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 11:35:54,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:54,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:54,489 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 11:35:54,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:54,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-28 11:35:54,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 11:35:54,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 11:35:54,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2018-11-28 11:35:54,514 INFO L87 Difference]: Start difference. First operand 476 states and 1086 transitions. Second operand 19 states. [2018-11-28 11:35:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:54,723 INFO L93 Difference]: Finished difference Result 834 states and 1851 transitions. [2018-11-28 11:35:54,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 11:35:54,723 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2018-11-28 11:35:54,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:54,725 INFO L225 Difference]: With dead ends: 834 [2018-11-28 11:35:54,725 INFO L226 Difference]: Without dead ends: 703 [2018-11-28 11:35:54,725 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 11:35:54,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2018-11-28 11:35:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 703. [2018-11-28 11:35:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2018-11-28 11:35:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1540 transitions. [2018-11-28 11:35:54,730 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1540 transitions. Word has length 73 [2018-11-28 11:35:54,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:54,731 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1540 transitions. [2018-11-28 11:35:54,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 11:35:54,731 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1540 transitions. [2018-11-28 11:35:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-28 11:35:54,731 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:54,732 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 11:35:54,732 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:54,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:54,732 INFO L82 PathProgramCache]: Analyzing trace with hash -119534393, now seen corresponding path program 23 times [2018-11-28 11:35:54,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:54,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:54,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:54,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:54,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:54,865 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 11:35:54,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:54,865 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:54,872 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 11:35:54,887 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-11-28 11:35:54,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:54,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:54,904 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 11:35:54,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:54,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-28 11:35:54,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 11:35:54,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 11:35:54,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-11-28 11:35:54,919 INFO L87 Difference]: Start difference. First operand 703 states and 1540 transitions. Second operand 20 states. [2018-11-28 11:35:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:55,123 INFO L93 Difference]: Finished difference Result 850 states and 1883 transitions. [2018-11-28 11:35:55,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-28 11:35:55,123 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-11-28 11:35:55,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:55,125 INFO L225 Difference]: With dead ends: 850 [2018-11-28 11:35:55,125 INFO L226 Difference]: Without dead ends: 719 [2018-11-28 11:35:55,125 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 11:35:55,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2018-11-28 11:35:55,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 492. [2018-11-28 11:35:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2018-11-28 11:35:55,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1118 transitions. [2018-11-28 11:35:55,130 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1118 transitions. Word has length 77 [2018-11-28 11:35:55,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:55,130 INFO L480 AbstractCegarLoop]: Abstraction has 492 states and 1118 transitions. [2018-11-28 11:35:55,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 11:35:55,130 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1118 transitions. [2018-11-28 11:35:55,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-28 11:35:55,130 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:55,131 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 11:35:55,131 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:55,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:55,131 INFO L82 PathProgramCache]: Analyzing trace with hash -604365075, now seen corresponding path program 24 times [2018-11-28 11:35:55,131 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:55,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:55,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:55,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:55,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:55,261 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 11:35:55,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:55,261 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:55,268 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 11:35:55,285 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-11-28 11:35:55,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:55,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:55,305 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 11:35:55,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:55,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-28 11:35:55,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 11:35:55,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 11:35:55,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-11-28 11:35:55,320 INFO L87 Difference]: Start difference. First operand 492 states and 1118 transitions. Second operand 20 states. [2018-11-28 11:35:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:55,503 INFO L93 Difference]: Finished difference Result 866 states and 1915 transitions. [2018-11-28 11:35:55,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-28 11:35:55,503 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2018-11-28 11:35:55,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:55,505 INFO L225 Difference]: With dead ends: 866 [2018-11-28 11:35:55,505 INFO L226 Difference]: Without dead ends: 735 [2018-11-28 11:35:55,505 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 11:35:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-11-28 11:35:55,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2018-11-28 11:35:55,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2018-11-28 11:35:55,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1604 transitions. [2018-11-28 11:35:55,511 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1604 transitions. Word has length 77 [2018-11-28 11:35:55,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:55,511 INFO L480 AbstractCegarLoop]: Abstraction has 735 states and 1604 transitions. [2018-11-28 11:35:55,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 11:35:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1604 transitions. [2018-11-28 11:35:55,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-28 11:35:55,512 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:55,512 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 11:35:55,512 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:55,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:55,512 INFO L82 PathProgramCache]: Analyzing trace with hash -398143222, now seen corresponding path program 25 times [2018-11-28 11:35:55,512 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:55,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:55,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:55,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:55,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:55,639 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 11:35:55,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:55,639 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:55,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:55,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:55,682 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 11:35:55,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:55,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-28 11:35:55,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 11:35:55,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 11:35:55,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-11-28 11:35:55,697 INFO L87 Difference]: Start difference. First operand 735 states and 1604 transitions. Second operand 21 states. [2018-11-28 11:35:55,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:55,900 INFO L93 Difference]: Finished difference Result 882 states and 1947 transitions. [2018-11-28 11:35:55,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 11:35:55,900 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-11-28 11:35:55,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:55,902 INFO L225 Difference]: With dead ends: 882 [2018-11-28 11:35:55,902 INFO L226 Difference]: Without dead ends: 751 [2018-11-28 11:35:55,902 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=437, Invalid=969, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 11:35:55,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2018-11-28 11:35:55,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 508. [2018-11-28 11:35:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-11-28 11:35:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1150 transitions. [2018-11-28 11:35:55,907 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1150 transitions. Word has length 81 [2018-11-28 11:35:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:55,907 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 1150 transitions. [2018-11-28 11:35:55,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 11:35:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1150 transitions. [2018-11-28 11:35:55,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-28 11:35:55,908 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:55,908 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 11:35:55,908 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:55,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:55,908 INFO L82 PathProgramCache]: Analyzing trace with hash 261676042, now seen corresponding path program 26 times [2018-11-28 11:35:55,908 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:55,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:55,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:55,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:55,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:56,034 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 11:35:56,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:56,034 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:56,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:35:56,065 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:35:56,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:56,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:56,097 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 11:35:56,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:56,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-28 11:35:56,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-28 11:35:56,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-28 11:35:56,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-11-28 11:35:56,112 INFO L87 Difference]: Start difference. First operand 508 states and 1150 transitions. Second operand 21 states. [2018-11-28 11:35:56,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:56,324 INFO L93 Difference]: Finished difference Result 898 states and 1979 transitions. [2018-11-28 11:35:56,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 11:35:56,324 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2018-11-28 11:35:56,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:56,325 INFO L225 Difference]: With dead ends: 898 [2018-11-28 11:35:56,325 INFO L226 Difference]: Without dead ends: 767 [2018-11-28 11:35:56,326 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 11:35:56,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2018-11-28 11:35:56,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2018-11-28 11:35:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2018-11-28 11:35:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1668 transitions. [2018-11-28 11:35:56,331 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1668 transitions. Word has length 81 [2018-11-28 11:35:56,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:56,331 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 1668 transitions. [2018-11-28 11:35:56,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-28 11:35:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1668 transitions. [2018-11-28 11:35:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-28 11:35:56,332 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:56,332 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 11:35:56,332 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:56,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:56,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1261226073, now seen corresponding path program 27 times [2018-11-28 11:35:56,332 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:56,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:56,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:56,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:56,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:56,454 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 11:35:56,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:56,454 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:56,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 11:35:56,480 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-28 11:35:56,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:56,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:56,500 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 11:35:56,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:56,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-28 11:35:56,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 11:35:56,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 11:35:56,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-11-28 11:35:56,515 INFO L87 Difference]: Start difference. First operand 767 states and 1668 transitions. Second operand 22 states. [2018-11-28 11:35:56,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:56,748 INFO L93 Difference]: Finished difference Result 914 states and 2011 transitions. [2018-11-28 11:35:56,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 11:35:56,748 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-11-28 11:35:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:56,750 INFO L225 Difference]: With dead ends: 914 [2018-11-28 11:35:56,750 INFO L226 Difference]: Without dead ends: 783 [2018-11-28 11:35:56,750 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=470, Invalid=1090, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 11:35:56,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-11-28 11:35:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 524. [2018-11-28 11:35:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2018-11-28 11:35:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1182 transitions. [2018-11-28 11:35:56,755 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1182 transitions. Word has length 85 [2018-11-28 11:35:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:56,755 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1182 transitions. [2018-11-28 11:35:56,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 11:35:56,755 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1182 transitions. [2018-11-28 11:35:56,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-28 11:35:56,755 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:56,755 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 11:35:56,756 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:56,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:56,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1269712589, now seen corresponding path program 28 times [2018-11-28 11:35:56,756 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:56,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:56,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:56,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:56,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:56,875 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 11:35:56,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:56,875 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:56,883 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 11:35:56,898 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 11:35:56,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:56,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:56,918 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 11:35:56,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:56,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-28 11:35:56,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 11:35:56,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 11:35:56,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-11-28 11:35:56,933 INFO L87 Difference]: Start difference. First operand 524 states and 1182 transitions. Second operand 22 states. [2018-11-28 11:35:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:57,153 INFO L93 Difference]: Finished difference Result 930 states and 2043 transitions. [2018-11-28 11:35:57,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-28 11:35:57,153 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2018-11-28 11:35:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:57,155 INFO L225 Difference]: With dead ends: 930 [2018-11-28 11:35:57,155 INFO L226 Difference]: Without dead ends: 799 [2018-11-28 11:35:57,155 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=450, Invalid=1032, Unknown=0, NotChecked=0, Total=1482 [2018-11-28 11:35:57,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2018-11-28 11:35:57,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 799. [2018-11-28 11:35:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2018-11-28 11:35:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1732 transitions. [2018-11-28 11:35:57,161 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1732 transitions. Word has length 85 [2018-11-28 11:35:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:57,161 INFO L480 AbstractCegarLoop]: Abstraction has 799 states and 1732 transitions. [2018-11-28 11:35:57,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 11:35:57,162 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1732 transitions. [2018-11-28 11:35:57,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-28 11:35:57,162 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:57,162 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 11:35:57,163 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:57,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:57,163 INFO L82 PathProgramCache]: Analyzing trace with hash -823686166, now seen corresponding path program 29 times [2018-11-28 11:35:57,163 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:57,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:57,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:57,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:57,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:57,301 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 11:35:57,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:57,301 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:57,309 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 11:35:57,343 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-28 11:35:57,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:57,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:57,365 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 11:35:57,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:57,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-28 11:35:57,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-28 11:35:57,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-28 11:35:57,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-11-28 11:35:57,389 INFO L87 Difference]: Start difference. First operand 799 states and 1732 transitions. Second operand 23 states. [2018-11-28 11:35:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:57,673 INFO L93 Difference]: Finished difference Result 946 states and 2075 transitions. [2018-11-28 11:35:57,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-28 11:35:57,674 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-11-28 11:35:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:57,676 INFO L225 Difference]: With dead ends: 946 [2018-11-28 11:35:57,676 INFO L226 Difference]: Without dead ends: 815 [2018-11-28 11:35:57,676 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 11:35:57,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2018-11-28 11:35:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 540. [2018-11-28 11:35:57,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2018-11-28 11:35:57,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1214 transitions. [2018-11-28 11:35:57,684 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1214 transitions. Word has length 89 [2018-11-28 11:35:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:57,684 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1214 transitions. [2018-11-28 11:35:57,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-28 11:35:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1214 transitions. [2018-11-28 11:35:57,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-28 11:35:57,685 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:57,685 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 11:35:57,685 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:57,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:57,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1221192726, now seen corresponding path program 30 times [2018-11-28 11:35:57,686 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:57,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:57,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:57,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:57,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:57,827 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 11:35:57,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:57,827 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:57,844 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 11:35:57,884 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-11-28 11:35:57,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:57,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:57,937 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 11:35:57,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:57,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-28 11:35:57,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-28 11:35:57,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-28 11:35:57,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2018-11-28 11:35:57,953 INFO L87 Difference]: Start difference. First operand 540 states and 1214 transitions. Second operand 23 states. [2018-11-28 11:35:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:58,241 INFO L93 Difference]: Finished difference Result 962 states and 2107 transitions. [2018-11-28 11:35:58,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-28 11:35:58,242 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2018-11-28 11:35:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:58,244 INFO L225 Difference]: With dead ends: 962 [2018-11-28 11:35:58,244 INFO L226 Difference]: Without dead ends: 831 [2018-11-28 11:35:58,244 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2018-11-28 11:35:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-11-28 11:35:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 831. [2018-11-28 11:35:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 831 states. [2018-11-28 11:35:58,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1796 transitions. [2018-11-28 11:35:58,253 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1796 transitions. Word has length 89 [2018-11-28 11:35:58,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:58,253 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1796 transitions. [2018-11-28 11:35:58,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-28 11:35:58,253 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1796 transitions. [2018-11-28 11:35:58,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-28 11:35:58,254 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:58,254 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 11:35:58,254 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:58,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:58,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1008893305, now seen corresponding path program 31 times [2018-11-28 11:35:58,255 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:58,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:58,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:58,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:58,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:58,428 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 11:35:58,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:58,429 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:58,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:58,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:58,475 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 11:35:58,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:58,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-28 11:35:58,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-28 11:35:58,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-28 11:35:58,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-11-28 11:35:58,490 INFO L87 Difference]: Start difference. First operand 831 states and 1796 transitions. Second operand 24 states. [2018-11-28 11:35:58,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:58,785 INFO L93 Difference]: Finished difference Result 978 states and 2139 transitions. [2018-11-28 11:35:58,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 11:35:58,786 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-11-28 11:35:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:58,787 INFO L225 Difference]: With dead ends: 978 [2018-11-28 11:35:58,788 INFO L226 Difference]: Without dead ends: 847 [2018-11-28 11:35:58,788 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 11:35:58,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2018-11-28 11:35:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 556. [2018-11-28 11:35:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-11-28 11:35:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1246 transitions. [2018-11-28 11:35:58,793 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1246 transitions. Word has length 93 [2018-11-28 11:35:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:58,794 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 1246 transitions. [2018-11-28 11:35:58,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-28 11:35:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1246 transitions. [2018-11-28 11:35:58,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-28 11:35:58,794 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:58,795 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 11:35:58,795 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:58,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:58,795 INFO L82 PathProgramCache]: Analyzing trace with hash -265515347, now seen corresponding path program 32 times [2018-11-28 11:35:58,795 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:58,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:58,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:58,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:35:58,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:58,958 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 11:35:58,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:58,958 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:58,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:35:58,986 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:35:58,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:58,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:59,010 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 11:35:59,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:59,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-28 11:35:59,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-28 11:35:59,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-28 11:35:59,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2018-11-28 11:35:59,025 INFO L87 Difference]: Start difference. First operand 556 states and 1246 transitions. Second operand 24 states. [2018-11-28 11:35:59,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:59,285 INFO L93 Difference]: Finished difference Result 994 states and 2171 transitions. [2018-11-28 11:35:59,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-28 11:35:59,285 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2018-11-28 11:35:59,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:59,286 INFO L225 Difference]: With dead ends: 994 [2018-11-28 11:35:59,286 INFO L226 Difference]: Without dead ends: 863 [2018-11-28 11:35:59,287 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 11:35:59,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2018-11-28 11:35:59,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2018-11-28 11:35:59,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2018-11-28 11:35:59,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1860 transitions. [2018-11-28 11:35:59,293 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1860 transitions. Word has length 93 [2018-11-28 11:35:59,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:59,293 INFO L480 AbstractCegarLoop]: Abstraction has 863 states and 1860 transitions. [2018-11-28 11:35:59,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-28 11:35:59,294 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1860 transitions. [2018-11-28 11:35:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 11:35:59,294 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:59,294 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 11:35:59,295 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:59,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:59,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1745970890, now seen corresponding path program 33 times [2018-11-28 11:35:59,295 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:59,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:59,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:59,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:59,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:35:59,463 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 11:35:59,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:35:59,463 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/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 11:35:59,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 11:35:59,516 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-28 11:35:59,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:35:59,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:35:59,545 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 11:35:59,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:35:59,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-11-28 11:35:59,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-28 11:35:59,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-28 11:35:59,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2018-11-28 11:35:59,569 INFO L87 Difference]: Start difference. First operand 863 states and 1860 transitions. Second operand 25 states. [2018-11-28 11:35:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:35:59,895 INFO L93 Difference]: Finished difference Result 1010 states and 2203 transitions. [2018-11-28 11:35:59,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 11:35:59,895 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-11-28 11:35:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:35:59,897 INFO L225 Difference]: With dead ends: 1010 [2018-11-28 11:35:59,897 INFO L226 Difference]: Without dead ends: 879 [2018-11-28 11:35:59,897 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2018-11-28 11:35:59,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-11-28 11:35:59,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 572. [2018-11-28 11:35:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2018-11-28 11:35:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1278 transitions. [2018-11-28 11:35:59,903 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1278 transitions. Word has length 97 [2018-11-28 11:35:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:35:59,903 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1278 transitions. [2018-11-28 11:35:59,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-28 11:35:59,903 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1278 transitions. [2018-11-28 11:35:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-28 11:35:59,903 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:35:59,904 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 11:35:59,904 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:35:59,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:35:59,904 INFO L82 PathProgramCache]: Analyzing trace with hash -510825526, now seen corresponding path program 34 times [2018-11-28 11:35:59,904 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:35:59,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:35:59,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:59,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:35:59,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:35:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:35:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:35:59,944 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 11:36:00,003 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-11-28 11:36:00,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 11:36:00 BasicIcfg [2018-11-28 11:36:00,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 11:36:00,006 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 11:36:00,006 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 11:36:00,006 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 11:36:00,008 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:35:47" (3/4) ... [2018-11-28 11:36:00,010 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 11:36:00,075 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_757e1496-3e06-45a2-8a46-ae10d184fd75/bin-2019/uautomizer/witness.graphml [2018-11-28 11:36:00,075 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 11:36:00,075 INFO L168 Benchmark]: Toolchain (without parser) took 13660.14 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 534.2 MB). Free memory was 956.0 MB in the beginning and 1.4 GB in the end (delta: -475.7 MB). Peak memory consumption was 58.5 MB. Max. memory is 11.5 GB. [2018-11-28 11:36:00,077 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:36:00,077 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 956.0 MB in the beginning and 1.1 GB in the end (delta: -178.0 MB). Peak memory consumption was 32.8 MB. Max. memory is 11.5 GB. [2018-11-28 11:36:00,078 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.34 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 11:36:00,078 INFO L168 Benchmark]: Boogie Preprocessor took 18.77 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: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2018-11-28 11:36:00,078 INFO L168 Benchmark]: RCFGBuilder took 216.90 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: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2018-11-28 11:36:00,078 INFO L168 Benchmark]: TraceAbstraction took 12980.50 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 379.1 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -334.3 MB). Peak memory consumption was 44.8 MB. Max. memory is 11.5 GB. [2018-11-28 11:36:00,078 INFO L168 Benchmark]: Witness Printer took 68.69 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 11.5 GB. [2018-11-28 11:36:00,080 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 342.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 956.0 MB in the beginning and 1.1 GB in the end (delta: -178.0 MB). Peak memory consumption was 32.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.34 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. * Boogie Preprocessor took 18.77 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: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 216.90 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: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 12980.50 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 379.1 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -334.3 MB). Peak memory consumption was 44.8 MB. Max. memory is 11.5 GB. * Witness Printer took 68.69 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 688]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L660] -1 int i = 3, j = 6; VAL [i=3, j=6] [L678] -1 pthread_t id1, id2; VAL [i=3, j=6] [L679] FCALL, FORK -1 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L662] 0 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L680] FCALL, FORK -1 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L670] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=5] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=6] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=7] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=8] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L682] -1 int condI = i >= (2*10 +6); [L685] -1 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L687] COND TRUE -1 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L688] -1 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. UNSAFE Result, 12.9s OverallTime, 40 OverallIterations, 10 TraceHistogramMax, 6.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2153 SDtfs, 10517 SDslu, 14630 SDs, 0 SdLazy, 2804 SolverSat, 1538 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3123 GetRequests, 2179 SyntacticMatches, 0 SemanticMatches, 944 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5096 ImplicationChecksByTransitivity, 7.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1012occurred in iteration=0, 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: 0.2s AutomataMinimizationTime, 39 MinimizatonAttempts, 3088 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 4530 NumberOfCodeBlocks, 4530 NumberOfCodeBlocksAsserted, 171 NumberOfCheckSat, 4359 ConstructedInterpolants, 0 QuantifiedInterpolants, 883467 SizeOfPredicates, 499 NumberOfNonLiveVariables, 5322 ConjunctsInSsa, 612 ConjunctsInUnsatCore, 74 InterpolantComputations, 4 PerfectInterpolantSequences, 0/7176 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...