./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Addition03_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Addition03_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 dc212c6f03bbd9a964d699fa8baa949beea27f48 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 02:50:53,733 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 02:50:53,734 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 02:50:53,741 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 02:50:53,741 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 02:50:53,742 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 02:50:53,743 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 02:50:53,745 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 02:50:53,746 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 02:50:53,747 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 02:50:53,747 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 02:50:53,747 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 02:50:53,748 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 02:50:53,749 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 02:50:53,749 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 02:50:53,750 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 02:50:53,750 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 02:50:53,751 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 02:50:53,753 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 02:50:53,754 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 02:50:53,755 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 02:50:53,756 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 02:50:53,757 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 02:50:53,758 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 02:50:53,758 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 02:50:53,758 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 02:50:53,759 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 02:50:53,760 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 02:50:53,760 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 02:50:53,761 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 02:50:53,761 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 02:50:53,761 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 02:50:53,761 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 02:50:53,762 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 02:50:53,762 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 02:50:53,762 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 02:50:53,763 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 02:50:53,770 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 02:50:53,771 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 02:50:53,771 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 02:50:53,771 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 02:50:53,772 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 02:50:53,772 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 02:50:53,772 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 02:50:53,772 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 02:50:53,773 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 02:50:53,773 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 02:50:53,773 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 02:50:53,773 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 02:50:53,773 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 02:50:53,773 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 02:50:53,773 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 02:50:53,774 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 02:50:53,774 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 02:50:53,774 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 02:50:53,774 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 02:50:53,774 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 02:50:53,774 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 02:50:53,774 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 02:50:53,775 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 02:50:53,775 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 02:50:53,775 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 02:50:53,775 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 02:50:53,775 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 02:50:53,775 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 02:50:53,775 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 02:50:53,776 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 02:50:53,776 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_05db068b-6d91-445e-b5f7-90eecdb11750/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 -> dc212c6f03bbd9a964d699fa8baa949beea27f48 [2018-11-23 02:50:53,801 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 02:50:53,811 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 02:50:53,814 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 02:50:53,815 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 02:50:53,815 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 02:50:53,816 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Addition03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 02:50:53,867 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/data/ecee2df48/32763e676fd543db9986e2cbf8523535/FLAG172bfc7f8 [2018-11-23 02:50:54,202 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 02:50:54,202 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/sv-benchmarks/c/recursive/Addition03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 02:50:54,207 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/data/ecee2df48/32763e676fd543db9986e2cbf8523535/FLAG172bfc7f8 [2018-11-23 02:50:54,219 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/data/ecee2df48/32763e676fd543db9986e2cbf8523535 [2018-11-23 02:50:54,221 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 02:50:54,222 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 02:50:54,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 02:50:54,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 02:50:54,225 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 02:50:54,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:50:54" (1/1) ... [2018-11-23 02:50:54,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e234a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:54, skipping insertion in model container [2018-11-23 02:50:54,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:50:54" (1/1) ... [2018-11-23 02:50:54,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 02:50:54,248 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 02:50:54,369 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 02:50:54,372 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 02:50:54,383 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 02:50:54,394 INFO L195 MainTranslator]: Completed translation [2018-11-23 02:50:54,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:54 WrapperNode [2018-11-23 02:50:54,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 02:50:54,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 02:50:54,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 02:50:54,395 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 02:50:54,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:54" (1/1) ... [2018-11-23 02:50:54,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:54" (1/1) ... [2018-11-23 02:50:54,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 02:50:54,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 02:50:54,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 02:50:54,410 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 02:50:54,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:54" (1/1) ... [2018-11-23 02:50:54,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:54" (1/1) ... [2018-11-23 02:50:54,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:54" (1/1) ... [2018-11-23 02:50:54,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:54" (1/1) ... [2018-11-23 02:50:54,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:54" (1/1) ... [2018-11-23 02:50:54,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:54" (1/1) ... [2018-11-23 02:50:54,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:54" (1/1) ... [2018-11-23 02:50:54,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 02:50:54,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 02:50:54,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 02:50:54,424 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 02:50:54,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:54,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 02:50:54,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 02:50:54,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 02:50:54,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 02:50:54,521 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 02:50:54,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 02:50:54,521 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2018-11-23 02:50:54,521 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2018-11-23 02:50:54,629 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 02:50:54,630 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 02:50:54,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:50:54 BoogieIcfgContainer [2018-11-23 02:50:54,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 02:50:54,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 02:50:54,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 02:50:54,634 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 02:50:54,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:50:54" (1/3) ... [2018-11-23 02:50:54,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70dcc447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:50:54, skipping insertion in model container [2018-11-23 02:50:54,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:50:54" (2/3) ... [2018-11-23 02:50:54,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70dcc447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:50:54, skipping insertion in model container [2018-11-23 02:50:54,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:50:54" (3/3) ... [2018-11-23 02:50:54,637 INFO L112 eAbstractionObserver]: Analyzing ICFG Addition03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 02:50:54,643 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 02:50:54,649 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 02:50:54,661 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 02:50:54,689 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 02:50:54,689 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 02:50:54,690 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 02:50:54,690 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 02:50:54,690 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 02:50:54,690 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 02:50:54,690 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 02:50:54,690 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 02:50:54,690 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 02:50:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-23 02:50:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 02:50:54,710 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:54,711 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:54,713 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:54,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:54,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1540493149, now seen corresponding path program 1 times [2018-11-23 02:50:54,719 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:54,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:54,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:54,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:50:54,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:50:54,852 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:50:54,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 02:50:54,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 02:50:54,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 02:50:54,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 02:50:54,872 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-23 02:50:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:54,983 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-11-23 02:50:54,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 02:50:54,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-23 02:50:54,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:54,991 INFO L225 Difference]: With dead ends: 36 [2018-11-23 02:50:54,991 INFO L226 Difference]: Without dead ends: 22 [2018-11-23 02:50:54,993 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 02:50:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-23 02:50:55,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-23 02:50:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-23 02:50:55,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2018-11-23 02:50:55,022 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2018-11-23 02:50:55,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:55,023 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2018-11-23 02:50:55,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 02:50:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2018-11-23 02:50:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-23 02:50:55,025 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:55,025 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:55,025 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:55,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:55,025 INFO L82 PathProgramCache]: Analyzing trace with hash -35294164, now seen corresponding path program 1 times [2018-11-23 02:50:55,025 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:55,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:55,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:55,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:50:55,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 02:50:55,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:55,114 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:55,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:50:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:55,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 02:50:55,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:55,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-23 02:50:55,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 02:50:55,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 02:50:55,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 02:50:55,190 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 6 states. [2018-11-23 02:50:55,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:55,287 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2018-11-23 02:50:55,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 02:50:55,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-11-23 02:50:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:55,288 INFO L225 Difference]: With dead ends: 29 [2018-11-23 02:50:55,288 INFO L226 Difference]: Without dead ends: 25 [2018-11-23 02:50:55,289 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-23 02:50:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-23 02:50:55,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-23 02:50:55,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-23 02:50:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2018-11-23 02:50:55,295 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 20 [2018-11-23 02:50:55,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:55,295 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2018-11-23 02:50:55,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 02:50:55,296 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2018-11-23 02:50:55,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-23 02:50:55,297 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:55,297 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:55,297 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:55,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:55,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1261456781, now seen corresponding path program 2 times [2018-11-23 02:50:55,298 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:55,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:55,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:55,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:50:55,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-23 02:50:55,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:55,374 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:55,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:50:55,399 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:50:55,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:50:55,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-23 02:50:55,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:55,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-23 02:50:55,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 02:50:55,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 02:50:55,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-23 02:50:55,427 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 7 states. [2018-11-23 02:50:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:55,512 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2018-11-23 02:50:55,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 02:50:55,513 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-23 02:50:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:55,514 INFO L225 Difference]: With dead ends: 32 [2018-11-23 02:50:55,514 INFO L226 Difference]: Without dead ends: 28 [2018-11-23 02:50:55,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-23 02:50:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-23 02:50:55,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-23 02:50:55,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-23 02:50:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2018-11-23 02:50:55,520 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 27 [2018-11-23 02:50:55,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:55,521 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2018-11-23 02:50:55,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 02:50:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2018-11-23 02:50:55,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-23 02:50:55,522 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:55,522 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:55,522 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:55,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:55,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2131329174, now seen corresponding path program 3 times [2018-11-23 02:50:55,523 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:55,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:55,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:55,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:50:55,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-23 02:50:55,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:55,598 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:55,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:50:55,636 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-23 02:50:55,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:50:55,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-23 02:50:55,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:55,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-23 02:50:55,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 02:50:55,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 02:50:55,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-23 02:50:55,667 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 8 states. [2018-11-23 02:50:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:55,766 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2018-11-23 02:50:55,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 02:50:55,766 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2018-11-23 02:50:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:55,767 INFO L225 Difference]: With dead ends: 35 [2018-11-23 02:50:55,767 INFO L226 Difference]: Without dead ends: 31 [2018-11-23 02:50:55,768 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-23 02:50:55,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-23 02:50:55,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-23 02:50:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-23 02:50:55,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2018-11-23 02:50:55,774 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 34 [2018-11-23 02:50:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:55,774 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2018-11-23 02:50:55,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 02:50:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2018-11-23 02:50:55,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-23 02:50:55,775 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:55,776 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:55,776 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:55,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:55,776 INFO L82 PathProgramCache]: Analyzing trace with hash -867295607, now seen corresponding path program 4 times [2018-11-23 02:50:55,776 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:55,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:55,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:55,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:50:55,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-23 02:50:55,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:55,876 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:55,894 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:50:55,916 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:50:55,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:50:55,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-23 02:50:55,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:55,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-23 02:50:55,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 02:50:55,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 02:50:55,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-23 02:50:55,951 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 9 states. [2018-11-23 02:50:56,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:56,052 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2018-11-23 02:50:56,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 02:50:56,052 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2018-11-23 02:50:56,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:56,053 INFO L225 Difference]: With dead ends: 38 [2018-11-23 02:50:56,053 INFO L226 Difference]: Without dead ends: 34 [2018-11-23 02:50:56,053 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-23 02:50:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-23 02:50:56,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-11-23 02:50:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-23 02:50:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2018-11-23 02:50:56,058 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 41 [2018-11-23 02:50:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:56,059 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2018-11-23 02:50:56,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 02:50:56,059 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2018-11-23 02:50:56,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-23 02:50:56,060 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:56,060 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:56,061 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:56,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:56,061 INFO L82 PathProgramCache]: Analyzing trace with hash -943688704, now seen corresponding path program 5 times [2018-11-23 02:50:56,061 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:56,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:56,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:56,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:50:56,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-23 02:50:56,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:56,152 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:56,158 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:50:56,174 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-23 02:50:56,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:50:56,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-23 02:50:56,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:56,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-23 02:50:56,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 02:50:56,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 02:50:56,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-23 02:50:56,210 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 10 states. [2018-11-23 02:50:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:56,315 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2018-11-23 02:50:56,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 02:50:56,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2018-11-23 02:50:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:56,318 INFO L225 Difference]: With dead ends: 41 [2018-11-23 02:50:56,318 INFO L226 Difference]: Without dead ends: 37 [2018-11-23 02:50:56,318 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-23 02:50:56,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-23 02:50:56,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-11-23 02:50:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-23 02:50:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2018-11-23 02:50:56,325 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 48 [2018-11-23 02:50:56,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:56,326 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2018-11-23 02:50:56,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 02:50:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2018-11-23 02:50:56,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-23 02:50:56,327 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:56,328 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:56,328 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:56,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:56,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1959654303, now seen corresponding path program 6 times [2018-11-23 02:50:56,329 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:56,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:56,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:56,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:50:56,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-23 02:50:56,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:56,427 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:56,434 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:50:56,454 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-23 02:50:56,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:50:56,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-23 02:50:56,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:56,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-23 02:50:56,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 02:50:56,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 02:50:56,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-23 02:50:56,500 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 11 states. [2018-11-23 02:50:56,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:56,593 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2018-11-23 02:50:56,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 02:50:56,594 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2018-11-23 02:50:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:56,594 INFO L225 Difference]: With dead ends: 44 [2018-11-23 02:50:56,595 INFO L226 Difference]: Without dead ends: 40 [2018-11-23 02:50:56,595 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-23 02:50:56,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-23 02:50:56,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-11-23 02:50:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-23 02:50:56,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2018-11-23 02:50:56,599 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 55 [2018-11-23 02:50:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:56,599 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2018-11-23 02:50:56,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 02:50:56,600 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2018-11-23 02:50:56,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-11-23 02:50:56,600 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:56,601 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:56,601 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:56,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:56,602 INFO L82 PathProgramCache]: Analyzing trace with hash 75083370, now seen corresponding path program 7 times [2018-11-23 02:50:56,602 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:56,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:56,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:56,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:50:56,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-23 02:50:56,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:56,685 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:56,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:50:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:56,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-23 02:50:56,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:56,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-23 02:50:56,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 02:50:56,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 02:50:56,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-23 02:50:56,750 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 12 states. [2018-11-23 02:50:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:56,861 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2018-11-23 02:50:56,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 02:50:56,861 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2018-11-23 02:50:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:56,862 INFO L225 Difference]: With dead ends: 47 [2018-11-23 02:50:56,862 INFO L226 Difference]: Without dead ends: 43 [2018-11-23 02:50:56,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-23 02:50:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-23 02:50:56,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-11-23 02:50:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-23 02:50:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2018-11-23 02:50:56,867 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 62 [2018-11-23 02:50:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:56,867 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2018-11-23 02:50:56,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 02:50:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2018-11-23 02:50:56,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-23 02:50:56,868 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:56,868 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:56,868 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:56,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:56,869 INFO L82 PathProgramCache]: Analyzing trace with hash 980406709, now seen corresponding path program 8 times [2018-11-23 02:50:56,869 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:56,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:56,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:56,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:50:56,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-11-23 02:50:56,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:56,967 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:56,974 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:50:56,993 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:50:56,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:50:56,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2018-11-23 02:50:57,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:57,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-23 02:50:57,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 02:50:57,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 02:50:57,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-23 02:50:57,042 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 13 states. [2018-11-23 02:50:57,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:57,178 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2018-11-23 02:50:57,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-23 02:50:57,179 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2018-11-23 02:50:57,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:57,180 INFO L225 Difference]: With dead ends: 50 [2018-11-23 02:50:57,180 INFO L226 Difference]: Without dead ends: 46 [2018-11-23 02:50:57,180 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-23 02:50:57,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-23 02:50:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-11-23 02:50:57,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-23 02:50:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2018-11-23 02:50:57,187 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 69 [2018-11-23 02:50:57,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:57,188 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2018-11-23 02:50:57,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 02:50:57,188 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2018-11-23 02:50:57,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-11-23 02:50:57,189 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:57,189 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:57,189 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:57,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:57,190 INFO L82 PathProgramCache]: Analyzing trace with hash -654012460, now seen corresponding path program 9 times [2018-11-23 02:50:57,190 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:57,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:57,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:57,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:50:57,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-11-23 02:50:57,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:57,311 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:57,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:50:57,348 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-23 02:50:57,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:50:57,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2018-11-23 02:50:57,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:57,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-23 02:50:57,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-23 02:50:57,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 02:50:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-23 02:50:57,403 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 14 states. [2018-11-23 02:50:57,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:57,620 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2018-11-23 02:50:57,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 02:50:57,620 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2018-11-23 02:50:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:57,621 INFO L225 Difference]: With dead ends: 53 [2018-11-23 02:50:57,621 INFO L226 Difference]: Without dead ends: 49 [2018-11-23 02:50:57,622 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-23 02:50:57,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-23 02:50:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-11-23 02:50:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-23 02:50:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2018-11-23 02:50:57,629 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 76 [2018-11-23 02:50:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:57,630 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2018-11-23 02:50:57,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-23 02:50:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2018-11-23 02:50:57,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-11-23 02:50:57,631 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:57,631 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:57,632 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:57,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:57,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1057728309, now seen corresponding path program 10 times [2018-11-23 02:50:57,632 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:57,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:57,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:57,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:50:57,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-11-23 02:50:57,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:57,767 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:57,774 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:50:57,795 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:50:57,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:50:57,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-11-23 02:50:57,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:57,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-23 02:50:57,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 02:50:57,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 02:50:57,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-23 02:50:57,837 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand 15 states. [2018-11-23 02:50:58,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:58,009 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2018-11-23 02:50:58,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-23 02:50:58,010 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2018-11-23 02:50:58,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:58,011 INFO L225 Difference]: With dead ends: 56 [2018-11-23 02:50:58,011 INFO L226 Difference]: Without dead ends: 52 [2018-11-23 02:50:58,012 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-23 02:50:58,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-23 02:50:58,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-11-23 02:50:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-23 02:50:58,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2018-11-23 02:50:58,020 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 83 [2018-11-23 02:50:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:58,020 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2018-11-23 02:50:58,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 02:50:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2018-11-23 02:50:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-11-23 02:50:58,021 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:58,022 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:58,022 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:58,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:58,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2104461250, now seen corresponding path program 11 times [2018-11-23 02:50:58,022 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:58,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:58,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:58,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:50:58,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-11-23 02:50:58,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:58,148 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:58,157 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:50:58,195 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-23 02:50:58,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:50:58,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-11-23 02:50:58,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:58,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-23 02:50:58,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 02:50:58,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 02:50:58,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-23 02:50:58,250 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 16 states. [2018-11-23 02:50:58,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:58,426 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2018-11-23 02:50:58,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-23 02:50:58,426 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2018-11-23 02:50:58,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:58,427 INFO L225 Difference]: With dead ends: 59 [2018-11-23 02:50:58,427 INFO L226 Difference]: Without dead ends: 55 [2018-11-23 02:50:58,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-23 02:50:58,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-23 02:50:58,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-11-23 02:50:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-23 02:50:58,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2018-11-23 02:50:58,432 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 90 [2018-11-23 02:50:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:58,433 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2018-11-23 02:50:58,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 02:50:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2018-11-23 02:50:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-23 02:50:58,434 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:58,434 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:58,434 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:58,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:58,434 INFO L82 PathProgramCache]: Analyzing trace with hash 565979361, now seen corresponding path program 12 times [2018-11-23 02:50:58,434 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:58,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:58,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:58,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:50:58,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-11-23 02:50:58,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:58,547 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:58,554 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:50:58,579 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-23 02:50:58,579 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:50:58,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2018-11-23 02:50:58,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:58,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-23 02:50:58,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-23 02:50:58,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-23 02:50:58,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-23 02:50:58,634 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand 17 states. [2018-11-23 02:50:58,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:58,834 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2018-11-23 02:50:58,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-23 02:50:58,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2018-11-23 02:50:58,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:58,835 INFO L225 Difference]: With dead ends: 62 [2018-11-23 02:50:58,835 INFO L226 Difference]: Without dead ends: 58 [2018-11-23 02:50:58,835 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-23 02:50:58,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-11-23 02:50:58,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-11-23 02:50:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-23 02:50:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2018-11-23 02:50:58,841 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 97 [2018-11-23 02:50:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:58,841 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2018-11-23 02:50:58,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-23 02:50:58,841 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2018-11-23 02:50:58,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-11-23 02:50:58,842 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:58,843 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:58,843 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:58,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:58,843 INFO L82 PathProgramCache]: Analyzing trace with hash -106117208, now seen corresponding path program 13 times [2018-11-23 02:50:58,843 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:58,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:58,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:58,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:50:58,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-11-23 02:50:59,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:59,010 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:59,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:50:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:59,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-11-23 02:50:59,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:59,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-23 02:50:59,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 02:50:59,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 02:50:59,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-23 02:50:59,113 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 18 states. [2018-11-23 02:50:59,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:59,304 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2018-11-23 02:50:59,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-23 02:50:59,304 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 104 [2018-11-23 02:50:59,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:59,305 INFO L225 Difference]: With dead ends: 65 [2018-11-23 02:50:59,305 INFO L226 Difference]: Without dead ends: 61 [2018-11-23 02:50:59,306 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-23 02:50:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-23 02:50:59,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-11-23 02:50:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-23 02:50:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2018-11-23 02:50:59,312 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 104 [2018-11-23 02:50:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:59,313 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2018-11-23 02:50:59,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 02:50:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2018-11-23 02:50:59,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-11-23 02:50:59,314 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:59,314 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:59,314 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:59,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:59,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1237836279, now seen corresponding path program 14 times [2018-11-23 02:50:59,315 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:59,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:59,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:59,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:50:59,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-23 02:50:59,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:59,450 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:59,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:50:59,484 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:50:59,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:50:59,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-23 02:50:59,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:59,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-23 02:50:59,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-23 02:50:59,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-23 02:50:59,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-23 02:50:59,520 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand 19 states. [2018-11-23 02:50:59,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:50:59,700 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2018-11-23 02:50:59,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 02:50:59,700 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2018-11-23 02:50:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:50:59,701 INFO L225 Difference]: With dead ends: 68 [2018-11-23 02:50:59,701 INFO L226 Difference]: Without dead ends: 64 [2018-11-23 02:50:59,702 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-11-23 02:50:59,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-11-23 02:50:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-11-23 02:50:59,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-23 02:50:59,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2018-11-23 02:50:59,709 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 111 [2018-11-23 02:50:59,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:50:59,709 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2018-11-23 02:50:59,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-23 02:50:59,709 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2018-11-23 02:50:59,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-11-23 02:50:59,710 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:50:59,710 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:50:59,710 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:50:59,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:50:59,711 INFO L82 PathProgramCache]: Analyzing trace with hash 340319762, now seen corresponding path program 15 times [2018-11-23 02:50:59,711 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:50:59,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:50:59,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:59,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:50:59,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:50:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:50:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2018-11-23 02:50:59,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:50:59,863 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:50:59,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:50:59,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-23 02:50:59,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:50:59,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:50:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2018-11-23 02:50:59,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:50:59,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-23 02:50:59,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-23 02:50:59,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-23 02:50:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-11-23 02:50:59,948 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 20 states. [2018-11-23 02:51:00,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:00,155 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2018-11-23 02:51:00,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-23 02:51:00,155 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 118 [2018-11-23 02:51:00,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:00,156 INFO L225 Difference]: With dead ends: 71 [2018-11-23 02:51:00,156 INFO L226 Difference]: Without dead ends: 67 [2018-11-23 02:51:00,157 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 02:51:00,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-23 02:51:00,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-11-23 02:51:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-23 02:51:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2018-11-23 02:51:00,161 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 118 [2018-11-23 02:51:00,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:00,162 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2018-11-23 02:51:00,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-23 02:51:00,162 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2018-11-23 02:51:00,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-23 02:51:00,163 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:00,163 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:00,163 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:00,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:00,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1471685645, now seen corresponding path program 16 times [2018-11-23 02:51:00,163 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:00,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:00,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:00,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:00,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-11-23 02:51:00,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:00,330 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:00,337 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:51:00,365 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:51:00,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:00,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-11-23 02:51:00,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:00,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-23 02:51:00,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-23 02:51:00,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-23 02:51:00,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-11-23 02:51:00,403 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 21 states. [2018-11-23 02:51:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:00,656 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2018-11-23 02:51:00,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-23 02:51:00,656 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2018-11-23 02:51:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:00,657 INFO L225 Difference]: With dead ends: 74 [2018-11-23 02:51:00,657 INFO L226 Difference]: Without dead ends: 70 [2018-11-23 02:51:00,658 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-11-23 02:51:00,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-11-23 02:51:00,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-11-23 02:51:00,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-11-23 02:51:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2018-11-23 02:51:00,664 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 125 [2018-11-23 02:51:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:00,664 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2018-11-23 02:51:00,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-23 02:51:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2018-11-23 02:51:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-23 02:51:00,665 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:00,665 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:00,665 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:00,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:00,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1481368708, now seen corresponding path program 17 times [2018-11-23 02:51:00,666 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:00,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:00,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:00,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:00,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-11-23 02:51:00,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:00,830 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:00,836 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:51:00,872 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-23 02:51:00,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:00,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-11-23 02:51:00,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:00,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-23 02:51:00,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-23 02:51:00,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-23 02:51:00,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-11-23 02:51:00,922 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand 22 states. [2018-11-23 02:51:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:01,138 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2018-11-23 02:51:01,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-23 02:51:01,138 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 132 [2018-11-23 02:51:01,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:01,139 INFO L225 Difference]: With dead ends: 77 [2018-11-23 02:51:01,139 INFO L226 Difference]: Without dead ends: 73 [2018-11-23 02:51:01,139 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-11-23 02:51:01,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-11-23 02:51:01,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-11-23 02:51:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-23 02:51:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2018-11-23 02:51:01,145 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 132 [2018-11-23 02:51:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:01,146 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2018-11-23 02:51:01,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-23 02:51:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2018-11-23 02:51:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-23 02:51:01,147 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:01,147 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:01,147 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:01,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:01,148 INFO L82 PathProgramCache]: Analyzing trace with hash -103968989, now seen corresponding path program 18 times [2018-11-23 02:51:01,148 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:01,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:01,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:01,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:01,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-11-23 02:51:01,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:01,314 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:01,327 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:51:01,389 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-23 02:51:01,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:01,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-11-23 02:51:01,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:01,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-23 02:51:01,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-23 02:51:01,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-23 02:51:01,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-11-23 02:51:01,432 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand 23 states. [2018-11-23 02:51:01,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:01,765 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2018-11-23 02:51:01,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-23 02:51:01,766 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2018-11-23 02:51:01,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:01,767 INFO L225 Difference]: With dead ends: 80 [2018-11-23 02:51:01,767 INFO L226 Difference]: Without dead ends: 76 [2018-11-23 02:51:01,768 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-11-23 02:51:01,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-23 02:51:01,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-11-23 02:51:01,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-11-23 02:51:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 99 transitions. [2018-11-23 02:51:01,773 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 99 transitions. Word has length 139 [2018-11-23 02:51:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:01,773 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 99 transitions. [2018-11-23 02:51:01,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-23 02:51:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 99 transitions. [2018-11-23 02:51:01,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-11-23 02:51:01,774 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:01,775 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:01,775 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:01,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:01,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1432494106, now seen corresponding path program 19 times [2018-11-23 02:51:01,775 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:01,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:01,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:01,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:01,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-11-23 02:51:01,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:01,973 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:01,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:02,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-11-23 02:51:02,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:02,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-23 02:51:02,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-23 02:51:02,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-23 02:51:02,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-23 02:51:02,053 INFO L87 Difference]: Start difference. First operand 76 states and 99 transitions. Second operand 24 states. [2018-11-23 02:51:02,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:02,355 INFO L93 Difference]: Finished difference Result 83 states and 107 transitions. [2018-11-23 02:51:02,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-23 02:51:02,355 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2018-11-23 02:51:02,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:02,356 INFO L225 Difference]: With dead ends: 83 [2018-11-23 02:51:02,356 INFO L226 Difference]: Without dead ends: 79 [2018-11-23 02:51:02,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-11-23 02:51:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-11-23 02:51:02,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-11-23 02:51:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-23 02:51:02,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2018-11-23 02:51:02,365 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 146 [2018-11-23 02:51:02,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:02,365 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2018-11-23 02:51:02,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-23 02:51:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2018-11-23 02:51:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-11-23 02:51:02,366 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:02,366 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:02,367 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:02,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:02,367 INFO L82 PathProgramCache]: Analyzing trace with hash -873938119, now seen corresponding path program 20 times [2018-11-23 02:51:02,367 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:02,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:02,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:02,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:02,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-11-23 02:51:02,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:02,612 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:02,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:51:02,656 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:51:02,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:02,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-11-23 02:51:02,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:02,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-23 02:51:02,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-23 02:51:02,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-23 02:51:02,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-11-23 02:51:02,699 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand 25 states. [2018-11-23 02:51:02,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:02,997 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2018-11-23 02:51:02,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-23 02:51:02,998 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 153 [2018-11-23 02:51:02,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:02,999 INFO L225 Difference]: With dead ends: 86 [2018-11-23 02:51:02,999 INFO L226 Difference]: Without dead ends: 82 [2018-11-23 02:51:03,000 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-11-23 02:51:03,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-11-23 02:51:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-11-23 02:51:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-23 02:51:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2018-11-23 02:51:03,010 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 153 [2018-11-23 02:51:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:03,011 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2018-11-23 02:51:03,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-23 02:51:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2018-11-23 02:51:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-11-23 02:51:03,015 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:03,015 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:03,015 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:03,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:03,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1461029712, now seen corresponding path program 21 times [2018-11-23 02:51:03,016 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:03,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:03,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:03,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:03,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-11-23 02:51:03,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:03,334 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:03,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:51:03,386 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-23 02:51:03,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:03,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-11-23 02:51:03,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:03,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-23 02:51:03,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-23 02:51:03,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-23 02:51:03,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-11-23 02:51:03,439 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand 26 states. [2018-11-23 02:51:03,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:03,751 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2018-11-23 02:51:03,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-23 02:51:03,752 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 160 [2018-11-23 02:51:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:03,753 INFO L225 Difference]: With dead ends: 89 [2018-11-23 02:51:03,753 INFO L226 Difference]: Without dead ends: 85 [2018-11-23 02:51:03,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-11-23 02:51:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-11-23 02:51:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-11-23 02:51:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-23 02:51:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 111 transitions. [2018-11-23 02:51:03,760 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 111 transitions. Word has length 160 [2018-11-23 02:51:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:03,760 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 111 transitions. [2018-11-23 02:51:03,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-23 02:51:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 111 transitions. [2018-11-23 02:51:03,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-11-23 02:51:03,761 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:03,761 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:03,762 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:03,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:03,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1249222577, now seen corresponding path program 22 times [2018-11-23 02:51:03,762 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:03,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:03,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:03,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:03,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2018-11-23 02:51:04,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:04,000 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:04,006 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:51:04,038 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:51:04,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:04,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2018-11-23 02:51:04,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:04,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-23 02:51:04,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-23 02:51:04,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-23 02:51:04,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2018-11-23 02:51:04,107 INFO L87 Difference]: Start difference. First operand 85 states and 111 transitions. Second operand 27 states. [2018-11-23 02:51:04,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:04,414 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2018-11-23 02:51:04,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-23 02:51:04,414 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 167 [2018-11-23 02:51:04,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:04,415 INFO L225 Difference]: With dead ends: 92 [2018-11-23 02:51:04,415 INFO L226 Difference]: Without dead ends: 88 [2018-11-23 02:51:04,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2018-11-23 02:51:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-11-23 02:51:04,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-11-23 02:51:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-23 02:51:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 115 transitions. [2018-11-23 02:51:04,424 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 115 transitions. Word has length 167 [2018-11-23 02:51:04,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:04,424 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 115 transitions. [2018-11-23 02:51:04,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-23 02:51:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 115 transitions. [2018-11-23 02:51:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-11-23 02:51:04,425 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:04,426 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:04,426 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:04,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:04,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1284144570, now seen corresponding path program 23 times [2018-11-23 02:51:04,426 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:04,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:04,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:04,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:04,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2018-11-23 02:51:04,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:04,714 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:04,723 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:51:04,791 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-23 02:51:04,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:04,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2018-11-23 02:51:04,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:04,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-23 02:51:04,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-23 02:51:04,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-23 02:51:04,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-11-23 02:51:04,848 INFO L87 Difference]: Start difference. First operand 88 states and 115 transitions. Second operand 28 states. [2018-11-23 02:51:05,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:05,250 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2018-11-23 02:51:05,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-23 02:51:05,250 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 174 [2018-11-23 02:51:05,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:05,251 INFO L225 Difference]: With dead ends: 95 [2018-11-23 02:51:05,251 INFO L226 Difference]: Without dead ends: 91 [2018-11-23 02:51:05,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2018-11-23 02:51:05,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-11-23 02:51:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-11-23 02:51:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-11-23 02:51:05,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2018-11-23 02:51:05,256 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 174 [2018-11-23 02:51:05,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:05,256 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2018-11-23 02:51:05,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-23 02:51:05,256 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2018-11-23 02:51:05,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-11-23 02:51:05,257 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:05,257 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:05,257 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:05,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:05,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1205012069, now seen corresponding path program 24 times [2018-11-23 02:51:05,257 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:05,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:05,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:05,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:05,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2018-11-23 02:51:05,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:05,527 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:05,533 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:51:05,585 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-23 02:51:05,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:05,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2018-11-23 02:51:05,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:05,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-23 02:51:05,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-23 02:51:05,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-23 02:51:05,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2018-11-23 02:51:05,651 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 29 states. [2018-11-23 02:51:06,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:06,192 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2018-11-23 02:51:06,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-23 02:51:06,194 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 181 [2018-11-23 02:51:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:06,195 INFO L225 Difference]: With dead ends: 98 [2018-11-23 02:51:06,195 INFO L226 Difference]: Without dead ends: 94 [2018-11-23 02:51:06,196 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2018-11-23 02:51:06,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-11-23 02:51:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-11-23 02:51:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-23 02:51:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 123 transitions. [2018-11-23 02:51:06,202 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 123 transitions. Word has length 181 [2018-11-23 02:51:06,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:06,203 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 123 transitions. [2018-11-23 02:51:06,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-23 02:51:06,203 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 123 transitions. [2018-11-23 02:51:06,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-11-23 02:51:06,204 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:06,204 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:06,204 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:06,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:06,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1312024796, now seen corresponding path program 25 times [2018-11-23 02:51:06,205 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:06,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:06,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:06,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:06,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2018-11-23 02:51:06,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:06,538 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:06,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:06,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2018-11-23 02:51:06,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:06,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-11-23 02:51:06,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-23 02:51:06,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-23 02:51:06,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2018-11-23 02:51:06,634 INFO L87 Difference]: Start difference. First operand 94 states and 123 transitions. Second operand 30 states. [2018-11-23 02:51:07,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:07,021 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2018-11-23 02:51:07,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-23 02:51:07,022 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 188 [2018-11-23 02:51:07,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:07,022 INFO L225 Difference]: With dead ends: 101 [2018-11-23 02:51:07,022 INFO L226 Difference]: Without dead ends: 97 [2018-11-23 02:51:07,023 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1136, Invalid=1944, Unknown=0, NotChecked=0, Total=3080 [2018-11-23 02:51:07,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-11-23 02:51:07,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-11-23 02:51:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-23 02:51:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 127 transitions. [2018-11-23 02:51:07,032 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 127 transitions. Word has length 188 [2018-11-23 02:51:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:07,032 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 127 transitions. [2018-11-23 02:51:07,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-23 02:51:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 127 transitions. [2018-11-23 02:51:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-11-23 02:51:07,033 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:07,033 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:07,033 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:07,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:07,034 INFO L82 PathProgramCache]: Analyzing trace with hash 461591931, now seen corresponding path program 26 times [2018-11-23 02:51:07,034 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:07,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:07,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:07,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:07,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2018-11-23 02:51:07,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:07,337 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:07,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:51:07,386 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:51:07,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:07,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2018-11-23 02:51:07,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:07,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-11-23 02:51:07,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-23 02:51:07,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-23 02:51:07,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2018-11-23 02:51:07,465 INFO L87 Difference]: Start difference. First operand 97 states and 127 transitions. Second operand 31 states. [2018-11-23 02:51:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:07,874 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2018-11-23 02:51:07,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-23 02:51:07,875 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 195 [2018-11-23 02:51:07,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:07,876 INFO L225 Difference]: With dead ends: 104 [2018-11-23 02:51:07,876 INFO L226 Difference]: Without dead ends: 100 [2018-11-23 02:51:07,877 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1220, Invalid=2086, Unknown=0, NotChecked=0, Total=3306 [2018-11-23 02:51:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-11-23 02:51:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-11-23 02:51:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-11-23 02:51:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2018-11-23 02:51:07,884 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 195 [2018-11-23 02:51:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:07,885 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2018-11-23 02:51:07,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-23 02:51:07,885 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2018-11-23 02:51:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-11-23 02:51:07,886 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:07,886 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:07,886 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:07,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1460254606, now seen corresponding path program 27 times [2018-11-23 02:51:07,886 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:07,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:07,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:07,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:07,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2018-11-23 02:51:08,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:08,300 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:08,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:51:08,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-11-23 02:51:08,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:08,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2018-11-23 02:51:08,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:08,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-11-23 02:51:08,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-23 02:51:08,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-23 02:51:08,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2018-11-23 02:51:08,435 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand 32 states. [2018-11-23 02:51:08,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:08,865 INFO L93 Difference]: Finished difference Result 107 states and 139 transitions. [2018-11-23 02:51:08,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-23 02:51:08,865 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 202 [2018-11-23 02:51:08,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:08,866 INFO L225 Difference]: With dead ends: 107 [2018-11-23 02:51:08,866 INFO L226 Difference]: Without dead ends: 103 [2018-11-23 02:51:08,867 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1307, Invalid=2233, Unknown=0, NotChecked=0, Total=3540 [2018-11-23 02:51:08,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-23 02:51:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-11-23 02:51:08,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-11-23 02:51:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2018-11-23 02:51:08,875 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 202 [2018-11-23 02:51:08,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:08,875 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2018-11-23 02:51:08,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-23 02:51:08,875 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2018-11-23 02:51:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-11-23 02:51:08,877 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:08,877 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:08,877 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:08,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:08,877 INFO L82 PathProgramCache]: Analyzing trace with hash 788262289, now seen corresponding path program 28 times [2018-11-23 02:51:08,877 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:08,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:08,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:08,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:08,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2018-11-23 02:51:09,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:09,276 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:09,282 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:51:09,320 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:51:09,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:09,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2018-11-23 02:51:09,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:09,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-11-23 02:51:09,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-23 02:51:09,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-23 02:51:09,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2018-11-23 02:51:09,379 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand 33 states. [2018-11-23 02:51:09,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:09,907 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2018-11-23 02:51:09,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-23 02:51:09,909 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 209 [2018-11-23 02:51:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:09,910 INFO L225 Difference]: With dead ends: 110 [2018-11-23 02:51:09,910 INFO L226 Difference]: Without dead ends: 106 [2018-11-23 02:51:09,911 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1397, Invalid=2385, Unknown=0, NotChecked=0, Total=3782 [2018-11-23 02:51:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-11-23 02:51:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-11-23 02:51:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-11-23 02:51:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2018-11-23 02:51:09,918 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 209 [2018-11-23 02:51:09,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:09,918 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2018-11-23 02:51:09,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-23 02:51:09,918 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2018-11-23 02:51:09,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-11-23 02:51:09,919 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:09,920 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:09,920 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:09,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:09,920 INFO L82 PathProgramCache]: Analyzing trace with hash -674054408, now seen corresponding path program 29 times [2018-11-23 02:51:09,920 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:09,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:09,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:09,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:09,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2018-11-23 02:51:10,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:10,247 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:10,260 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:51:10,329 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-11-23 02:51:10,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:10,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2018-11-23 02:51:10,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:10,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-11-23 02:51:10,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-23 02:51:10,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-23 02:51:10,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2018-11-23 02:51:10,384 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand 34 states. [2018-11-23 02:51:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:10,837 INFO L93 Difference]: Finished difference Result 113 states and 147 transitions. [2018-11-23 02:51:10,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-23 02:51:10,837 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 216 [2018-11-23 02:51:10,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:10,838 INFO L225 Difference]: With dead ends: 113 [2018-11-23 02:51:10,838 INFO L226 Difference]: Without dead ends: 109 [2018-11-23 02:51:10,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1490, Invalid=2542, Unknown=0, NotChecked=0, Total=4032 [2018-11-23 02:51:10,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-11-23 02:51:10,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-11-23 02:51:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-23 02:51:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2018-11-23 02:51:10,851 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 216 [2018-11-23 02:51:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:10,851 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2018-11-23 02:51:10,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-23 02:51:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2018-11-23 02:51:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-11-23 02:51:10,853 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:10,853 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:10,853 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:10,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:10,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1144876711, now seen corresponding path program 30 times [2018-11-23 02:51:10,853 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:10,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:10,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:10,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:10,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2018-11-23 02:51:11,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:11,265 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:11,273 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:51:11,349 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-11-23 02:51:11,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:11,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2018-11-23 02:51:11,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:11,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-11-23 02:51:11,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-23 02:51:11,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-23 02:51:11,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2018-11-23 02:51:11,450 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 35 states. [2018-11-23 02:51:11,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:11,973 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2018-11-23 02:51:11,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-23 02:51:11,973 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 223 [2018-11-23 02:51:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:11,975 INFO L225 Difference]: With dead ends: 116 [2018-11-23 02:51:11,975 INFO L226 Difference]: Without dead ends: 112 [2018-11-23 02:51:11,976 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1586, Invalid=2704, Unknown=0, NotChecked=0, Total=4290 [2018-11-23 02:51:11,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-11-23 02:51:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-11-23 02:51:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-11-23 02:51:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 147 transitions. [2018-11-23 02:51:11,983 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 147 transitions. Word has length 223 [2018-11-23 02:51:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:11,983 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 147 transitions. [2018-11-23 02:51:11,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-23 02:51:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2018-11-23 02:51:11,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-11-23 02:51:11,984 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:11,985 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:11,985 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:11,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:11,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1122595486, now seen corresponding path program 31 times [2018-11-23 02:51:11,985 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:11,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:11,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:11,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:11,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2018-11-23 02:51:12,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:12,342 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:12,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:12,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2018-11-23 02:51:12,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:12,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-11-23 02:51:12,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-23 02:51:12,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-23 02:51:12,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 02:51:12,474 INFO L87 Difference]: Start difference. First operand 112 states and 147 transitions. Second operand 36 states. [2018-11-23 02:51:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:13,085 INFO L93 Difference]: Finished difference Result 119 states and 155 transitions. [2018-11-23 02:51:13,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-23 02:51:13,085 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 230 [2018-11-23 02:51:13,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:13,086 INFO L225 Difference]: With dead ends: 119 [2018-11-23 02:51:13,086 INFO L226 Difference]: Without dead ends: 115 [2018-11-23 02:51:13,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1685, Invalid=2871, Unknown=0, NotChecked=0, Total=4556 [2018-11-23 02:51:13,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-11-23 02:51:13,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-11-23 02:51:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-11-23 02:51:13,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 151 transitions. [2018-11-23 02:51:13,094 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 151 transitions. Word has length 230 [2018-11-23 02:51:13,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:13,094 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 151 transitions. [2018-11-23 02:51:13,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-23 02:51:13,094 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 151 transitions. [2018-11-23 02:51:13,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-11-23 02:51:13,096 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:13,096 INFO L402 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:13,096 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:13,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:13,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1055422653, now seen corresponding path program 32 times [2018-11-23 02:51:13,097 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:13,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:13,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:13,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:13,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2018-11-23 02:51:13,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:13,619 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:13,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:51:13,677 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:51:13,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:13,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2018-11-23 02:51:13,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:13,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-11-23 02:51:13,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-23 02:51:13,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-23 02:51:13,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2018-11-23 02:51:13,737 INFO L87 Difference]: Start difference. First operand 115 states and 151 transitions. Second operand 37 states. [2018-11-23 02:51:14,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:14,313 INFO L93 Difference]: Finished difference Result 122 states and 159 transitions. [2018-11-23 02:51:14,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-23 02:51:14,314 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 237 [2018-11-23 02:51:14,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:14,314 INFO L225 Difference]: With dead ends: 122 [2018-11-23 02:51:14,314 INFO L226 Difference]: Without dead ends: 118 [2018-11-23 02:51:14,315 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1787, Invalid=3043, Unknown=0, NotChecked=0, Total=4830 [2018-11-23 02:51:14,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-11-23 02:51:14,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-11-23 02:51:14,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-11-23 02:51:14,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 155 transitions. [2018-11-23 02:51:14,322 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 155 transitions. Word has length 237 [2018-11-23 02:51:14,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:14,322 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 155 transitions. [2018-11-23 02:51:14,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-23 02:51:14,322 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 155 transitions. [2018-11-23 02:51:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-11-23 02:51:14,324 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:14,324 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:14,324 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:14,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:14,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1624997172, now seen corresponding path program 33 times [2018-11-23 02:51:14,325 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:14,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:14,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:14,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:14,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2018-11-23 02:51:14,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:14,807 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:14,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:51:14,907 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-11-23 02:51:14,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:14,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2018-11-23 02:51:14,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:14,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-11-23 02:51:14,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-23 02:51:14,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-23 02:51:14,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2018-11-23 02:51:14,994 INFO L87 Difference]: Start difference. First operand 118 states and 155 transitions. Second operand 38 states. [2018-11-23 02:51:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:15,570 INFO L93 Difference]: Finished difference Result 125 states and 163 transitions. [2018-11-23 02:51:15,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-23 02:51:15,570 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 244 [2018-11-23 02:51:15,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:15,571 INFO L225 Difference]: With dead ends: 125 [2018-11-23 02:51:15,572 INFO L226 Difference]: Without dead ends: 121 [2018-11-23 02:51:15,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1892, Invalid=3220, Unknown=0, NotChecked=0, Total=5112 [2018-11-23 02:51:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-11-23 02:51:15,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-11-23 02:51:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-11-23 02:51:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 159 transitions. [2018-11-23 02:51:15,581 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 159 transitions. Word has length 244 [2018-11-23 02:51:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:15,581 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 159 transitions. [2018-11-23 02:51:15,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-23 02:51:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 159 transitions. [2018-11-23 02:51:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-11-23 02:51:15,582 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:15,582 INFO L402 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:15,583 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:15,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:15,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2109887533, now seen corresponding path program 34 times [2018-11-23 02:51:15,583 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:15,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:15,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:15,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:15,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2018-11-23 02:51:15,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:15,966 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:15,977 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:51:16,033 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:51:16,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:16,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2018-11-23 02:51:16,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:16,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-11-23 02:51:16,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-23 02:51:16,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-23 02:51:16,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2018-11-23 02:51:16,105 INFO L87 Difference]: Start difference. First operand 121 states and 159 transitions. Second operand 39 states. [2018-11-23 02:51:16,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:16,701 INFO L93 Difference]: Finished difference Result 128 states and 167 transitions. [2018-11-23 02:51:16,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-23 02:51:16,702 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 251 [2018-11-23 02:51:16,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:16,703 INFO L225 Difference]: With dead ends: 128 [2018-11-23 02:51:16,703 INFO L226 Difference]: Without dead ends: 124 [2018-11-23 02:51:16,703 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2000, Invalid=3402, Unknown=0, NotChecked=0, Total=5402 [2018-11-23 02:51:16,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-11-23 02:51:16,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-11-23 02:51:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-11-23 02:51:16,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 163 transitions. [2018-11-23 02:51:16,717 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 163 transitions. Word has length 251 [2018-11-23 02:51:16,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:16,718 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 163 transitions. [2018-11-23 02:51:16,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-23 02:51:16,718 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 163 transitions. [2018-11-23 02:51:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-11-23 02:51:16,719 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:16,719 INFO L402 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:16,719 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:16,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:16,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1202454326, now seen corresponding path program 35 times [2018-11-23 02:51:16,720 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:16,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:16,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:16,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:16,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-11-23 02:51:17,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:17,156 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/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 [2018-11-23 02:51:17,166 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:51:17,268 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-11-23 02:51:17,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:17,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-11-23 02:51:17,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:17,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-11-23 02:51:17,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-23 02:51:17,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-23 02:51:17,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2018-11-23 02:51:17,359 INFO L87 Difference]: Start difference. First operand 124 states and 163 transitions. Second operand 40 states. [2018-11-23 02:51:17,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:17,930 INFO L93 Difference]: Finished difference Result 131 states and 171 transitions. [2018-11-23 02:51:17,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-23 02:51:17,931 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 258 [2018-11-23 02:51:17,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:17,932 INFO L225 Difference]: With dead ends: 131 [2018-11-23 02:51:17,932 INFO L226 Difference]: Without dead ends: 127 [2018-11-23 02:51:17,933 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2111, Invalid=3589, Unknown=0, NotChecked=0, Total=5700 [2018-11-23 02:51:17,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-23 02:51:17,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-11-23 02:51:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-11-23 02:51:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 167 transitions. [2018-11-23 02:51:17,949 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 167 transitions. Word has length 258 [2018-11-23 02:51:17,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:17,950 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 167 transitions. [2018-11-23 02:51:17,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-23 02:51:17,950 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 167 transitions. [2018-11-23 02:51:17,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-11-23 02:51:17,951 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:17,951 INFO L402 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:17,952 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:17,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:17,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1327343593, now seen corresponding path program 36 times [2018-11-23 02:51:17,952 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:17,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:17,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:17,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:17,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4554 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2018-11-23 02:51:18,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:18,574 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:18,582 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:51:18,691 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-11-23 02:51:18,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:18,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4554 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2018-11-23 02:51:18,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:18,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-11-23 02:51:18,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-23 02:51:18,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-23 02:51:18,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2018-11-23 02:51:18,796 INFO L87 Difference]: Start difference. First operand 127 states and 167 transitions. Second operand 41 states. [2018-11-23 02:51:19,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:19,444 INFO L93 Difference]: Finished difference Result 134 states and 175 transitions. [2018-11-23 02:51:19,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-23 02:51:19,444 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 265 [2018-11-23 02:51:19,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:19,445 INFO L225 Difference]: With dead ends: 134 [2018-11-23 02:51:19,445 INFO L226 Difference]: Without dead ends: 130 [2018-11-23 02:51:19,446 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2225, Invalid=3781, Unknown=0, NotChecked=0, Total=6006 [2018-11-23 02:51:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-11-23 02:51:19,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-11-23 02:51:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-11-23 02:51:19,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 171 transitions. [2018-11-23 02:51:19,459 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 171 transitions. Word has length 265 [2018-11-23 02:51:19,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:19,459 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 171 transitions. [2018-11-23 02:51:19,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-23 02:51:19,460 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 171 transitions. [2018-11-23 02:51:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-11-23 02:51:19,461 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:19,461 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:19,461 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:19,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:19,461 INFO L82 PathProgramCache]: Analyzing trace with hash -742628704, now seen corresponding path program 37 times [2018-11-23 02:51:19,462 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:19,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:19,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:19,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:19,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 2738 trivial. 0 not checked. [2018-11-23 02:51:19,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:19,924 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:19,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:19,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 2738 trivial. 0 not checked. [2018-11-23 02:51:20,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:20,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-11-23 02:51:20,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-23 02:51:20,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-23 02:51:20,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2018-11-23 02:51:20,038 INFO L87 Difference]: Start difference. First operand 130 states and 171 transitions. Second operand 42 states. [2018-11-23 02:51:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:20,700 INFO L93 Difference]: Finished difference Result 137 states and 179 transitions. [2018-11-23 02:51:20,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-23 02:51:20,700 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 272 [2018-11-23 02:51:20,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:20,702 INFO L225 Difference]: With dead ends: 137 [2018-11-23 02:51:20,702 INFO L226 Difference]: Without dead ends: 133 [2018-11-23 02:51:20,703 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2342, Invalid=3978, Unknown=0, NotChecked=0, Total=6320 [2018-11-23 02:51:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-11-23 02:51:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-11-23 02:51:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-11-23 02:51:20,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 175 transitions. [2018-11-23 02:51:20,719 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 175 transitions. Word has length 272 [2018-11-23 02:51:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:20,720 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 175 transitions. [2018-11-23 02:51:20,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-23 02:51:20,720 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 175 transitions. [2018-11-23 02:51:20,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-11-23 02:51:20,721 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:20,721 INFO L402 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:20,721 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:20,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:20,721 INFO L82 PathProgramCache]: Analyzing trace with hash 571018495, now seen corresponding path program 38 times [2018-11-23 02:51:20,722 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:20,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:20,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:20,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:20,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5073 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2018-11-23 02:51:21,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:21,352 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:21,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:51:21,406 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:51:21,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:21,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5073 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2018-11-23 02:51:21,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:21,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-11-23 02:51:21,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-23 02:51:21,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-23 02:51:21,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2018-11-23 02:51:21,515 INFO L87 Difference]: Start difference. First operand 133 states and 175 transitions. Second operand 43 states. [2018-11-23 02:51:22,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:22,234 INFO L93 Difference]: Finished difference Result 140 states and 183 transitions. [2018-11-23 02:51:22,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-23 02:51:22,234 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 279 [2018-11-23 02:51:22,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:22,235 INFO L225 Difference]: With dead ends: 140 [2018-11-23 02:51:22,235 INFO L226 Difference]: Without dead ends: 136 [2018-11-23 02:51:22,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2462, Invalid=4180, Unknown=0, NotChecked=0, Total=6642 [2018-11-23 02:51:22,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-11-23 02:51:22,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-11-23 02:51:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-11-23 02:51:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 179 transitions. [2018-11-23 02:51:22,247 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 179 transitions. Word has length 279 [2018-11-23 02:51:22,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:22,248 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 179 transitions. [2018-11-23 02:51:22,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-23 02:51:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 179 transitions. [2018-11-23 02:51:22,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-11-23 02:51:22,249 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:22,249 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:22,250 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:22,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:22,250 INFO L82 PathProgramCache]: Analyzing trace with hash -708506358, now seen corresponding path program 39 times [2018-11-23 02:51:22,250 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:22,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:22,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:22,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:22,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5343 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3042 trivial. 0 not checked. [2018-11-23 02:51:22,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:22,803 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:22,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:51:22,909 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-11-23 02:51:22,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:22,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5343 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3042 trivial. 0 not checked. [2018-11-23 02:51:22,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:22,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-11-23 02:51:22,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-23 02:51:22,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-23 02:51:22,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2018-11-23 02:51:22,986 INFO L87 Difference]: Start difference. First operand 136 states and 179 transitions. Second operand 44 states. [2018-11-23 02:51:23,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:23,686 INFO L93 Difference]: Finished difference Result 143 states and 187 transitions. [2018-11-23 02:51:23,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-23 02:51:23,686 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 286 [2018-11-23 02:51:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:23,687 INFO L225 Difference]: With dead ends: 143 [2018-11-23 02:51:23,687 INFO L226 Difference]: Without dead ends: 139 [2018-11-23 02:51:23,687 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2585, Invalid=4387, Unknown=0, NotChecked=0, Total=6972 [2018-11-23 02:51:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-11-23 02:51:23,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-11-23 02:51:23,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-11-23 02:51:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 183 transitions. [2018-11-23 02:51:23,704 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 183 transitions. Word has length 286 [2018-11-23 02:51:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:23,704 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 183 transitions. [2018-11-23 02:51:23,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-23 02:51:23,704 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 183 transitions. [2018-11-23 02:51:23,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-11-23 02:51:23,705 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:23,705 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:23,705 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:23,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:23,706 INFO L82 PathProgramCache]: Analyzing trace with hash 287341333, now seen corresponding path program 40 times [2018-11-23 02:51:23,706 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:23,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:23,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:23,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:23,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5620 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2018-11-23 02:51:24,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:24,201 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:24,214 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:51:24,273 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:51:24,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:24,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5620 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2018-11-23 02:51:24,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:24,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-11-23 02:51:24,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-23 02:51:24,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-23 02:51:24,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2018-11-23 02:51:24,346 INFO L87 Difference]: Start difference. First operand 139 states and 183 transitions. Second operand 45 states. [2018-11-23 02:51:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:25,032 INFO L93 Difference]: Finished difference Result 146 states and 191 transitions. [2018-11-23 02:51:25,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-23 02:51:25,032 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 293 [2018-11-23 02:51:25,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:25,033 INFO L225 Difference]: With dead ends: 146 [2018-11-23 02:51:25,033 INFO L226 Difference]: Without dead ends: 142 [2018-11-23 02:51:25,034 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2711, Invalid=4599, Unknown=0, NotChecked=0, Total=7310 [2018-11-23 02:51:25,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-11-23 02:51:25,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-11-23 02:51:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-11-23 02:51:25,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 187 transitions. [2018-11-23 02:51:25,045 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 187 transitions. Word has length 293 [2018-11-23 02:51:25,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:25,045 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 187 transitions. [2018-11-23 02:51:25,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-23 02:51:25,045 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 187 transitions. [2018-11-23 02:51:25,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-11-23 02:51:25,046 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:25,046 INFO L402 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:25,046 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:25,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:25,046 INFO L82 PathProgramCache]: Analyzing trace with hash 2006277748, now seen corresponding path program 41 times [2018-11-23 02:51:25,046 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:25,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:25,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:25,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:25,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5904 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2018-11-23 02:51:25,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:25,623 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:25,630 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:51:25,741 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-11-23 02:51:25,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:25,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5904 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2018-11-23 02:51:25,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:25,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-11-23 02:51:25,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-23 02:51:25,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-23 02:51:25,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2018-11-23 02:51:25,812 INFO L87 Difference]: Start difference. First operand 142 states and 187 transitions. Second operand 46 states. [2018-11-23 02:51:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:26,607 INFO L93 Difference]: Finished difference Result 149 states and 195 transitions. [2018-11-23 02:51:26,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-23 02:51:26,607 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 300 [2018-11-23 02:51:26,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:26,608 INFO L225 Difference]: With dead ends: 149 [2018-11-23 02:51:26,608 INFO L226 Difference]: Without dead ends: 145 [2018-11-23 02:51:26,609 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2840, Invalid=4816, Unknown=0, NotChecked=0, Total=7656 [2018-11-23 02:51:26,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-11-23 02:51:26,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-11-23 02:51:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-11-23 02:51:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 191 transitions. [2018-11-23 02:51:26,622 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 191 transitions. Word has length 300 [2018-11-23 02:51:26,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:26,623 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 191 transitions. [2018-11-23 02:51:26,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-23 02:51:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 191 transitions. [2018-11-23 02:51:26,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-11-23 02:51:26,624 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:26,624 INFO L402 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:26,624 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:26,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:26,624 INFO L82 PathProgramCache]: Analyzing trace with hash 707039787, now seen corresponding path program 42 times [2018-11-23 02:51:26,624 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:26,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:26,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:26,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:26,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6195 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2018-11-23 02:51:27,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:27,173 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:27,181 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:51:27,290 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-11-23 02:51:27,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:27,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6195 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2018-11-23 02:51:27,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:27,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-11-23 02:51:27,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-23 02:51:27,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-23 02:51:27,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2018-11-23 02:51:27,390 INFO L87 Difference]: Start difference. First operand 145 states and 191 transitions. Second operand 47 states. [2018-11-23 02:51:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:28,174 INFO L93 Difference]: Finished difference Result 152 states and 199 transitions. [2018-11-23 02:51:28,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-23 02:51:28,174 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 307 [2018-11-23 02:51:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:28,175 INFO L225 Difference]: With dead ends: 152 [2018-11-23 02:51:28,175 INFO L226 Difference]: Without dead ends: 148 [2018-11-23 02:51:28,176 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2972, Invalid=5038, Unknown=0, NotChecked=0, Total=8010 [2018-11-23 02:51:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-11-23 02:51:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-11-23 02:51:28,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-11-23 02:51:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 195 transitions. [2018-11-23 02:51:28,201 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 195 transitions. Word has length 307 [2018-11-23 02:51:28,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:28,202 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 195 transitions. [2018-11-23 02:51:28,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-23 02:51:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 195 transitions. [2018-11-23 02:51:28,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-11-23 02:51:28,203 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:28,203 INFO L402 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:28,204 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:28,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:28,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1671645474, now seen corresponding path program 43 times [2018-11-23 02:51:28,204 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:28,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:28,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:28,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:28,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 3698 trivial. 0 not checked. [2018-11-23 02:51:28,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:28,781 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:28,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:28,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6493 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 3698 trivial. 0 not checked. [2018-11-23 02:51:28,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:28,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-11-23 02:51:28,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-11-23 02:51:28,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-11-23 02:51:28,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2018-11-23 02:51:28,910 INFO L87 Difference]: Start difference. First operand 148 states and 195 transitions. Second operand 48 states. [2018-11-23 02:51:29,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:29,740 INFO L93 Difference]: Finished difference Result 155 states and 203 transitions. [2018-11-23 02:51:29,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-23 02:51:29,741 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 314 [2018-11-23 02:51:29,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:29,741 INFO L225 Difference]: With dead ends: 155 [2018-11-23 02:51:29,741 INFO L226 Difference]: Without dead ends: 151 [2018-11-23 02:51:29,742 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3107, Invalid=5265, Unknown=0, NotChecked=0, Total=8372 [2018-11-23 02:51:29,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-11-23 02:51:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-11-23 02:51:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-11-23 02:51:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 199 transitions. [2018-11-23 02:51:29,755 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 199 transitions. Word has length 314 [2018-11-23 02:51:29,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:29,755 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 199 transitions. [2018-11-23 02:51:29,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-11-23 02:51:29,756 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 199 transitions. [2018-11-23 02:51:29,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-11-23 02:51:29,756 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:29,757 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:29,757 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:29,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:29,757 INFO L82 PathProgramCache]: Analyzing trace with hash -797576639, now seen corresponding path program 44 times [2018-11-23 02:51:29,757 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:29,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:29,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:29,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:29,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:30,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6798 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2018-11-23 02:51:30,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:30,361 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:30,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:51:30,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:51:30,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:30,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6798 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2018-11-23 02:51:30,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:30,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-11-23 02:51:30,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-11-23 02:51:30,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-11-23 02:51:30,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2018-11-23 02:51:30,531 INFO L87 Difference]: Start difference. First operand 151 states and 199 transitions. Second operand 49 states. [2018-11-23 02:51:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:31,401 INFO L93 Difference]: Finished difference Result 158 states and 207 transitions. [2018-11-23 02:51:31,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-23 02:51:31,401 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 321 [2018-11-23 02:51:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:31,402 INFO L225 Difference]: With dead ends: 158 [2018-11-23 02:51:31,402 INFO L226 Difference]: Without dead ends: 154 [2018-11-23 02:51:31,403 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3245, Invalid=5497, Unknown=0, NotChecked=0, Total=8742 [2018-11-23 02:51:31,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-11-23 02:51:31,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-11-23 02:51:31,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-11-23 02:51:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 203 transitions. [2018-11-23 02:51:31,417 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 203 transitions. Word has length 321 [2018-11-23 02:51:31,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:31,417 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 203 transitions. [2018-11-23 02:51:31,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-11-23 02:51:31,417 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 203 transitions. [2018-11-23 02:51:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-11-23 02:51:31,419 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:31,419 INFO L402 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:31,419 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:31,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:31,420 INFO L82 PathProgramCache]: Analyzing trace with hash 44725832, now seen corresponding path program 45 times [2018-11-23 02:51:31,420 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:31,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:31,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:31,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:31,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7110 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 4050 trivial. 0 not checked. [2018-11-23 02:51:32,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:32,048 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:32,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:51:32,179 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-11-23 02:51:32,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:32,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7110 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 4050 trivial. 0 not checked. [2018-11-23 02:51:32,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:32,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-11-23 02:51:32,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-23 02:51:32,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-23 02:51:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2018-11-23 02:51:32,311 INFO L87 Difference]: Start difference. First operand 154 states and 203 transitions. Second operand 50 states. [2018-11-23 02:51:33,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:33,179 INFO L93 Difference]: Finished difference Result 161 states and 211 transitions. [2018-11-23 02:51:33,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-23 02:51:33,180 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 328 [2018-11-23 02:51:33,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:33,181 INFO L225 Difference]: With dead ends: 161 [2018-11-23 02:51:33,181 INFO L226 Difference]: Without dead ends: 157 [2018-11-23 02:51:33,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3386, Invalid=5734, Unknown=0, NotChecked=0, Total=9120 [2018-11-23 02:51:33,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-11-23 02:51:33,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-11-23 02:51:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-11-23 02:51:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 207 transitions. [2018-11-23 02:51:33,200 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 207 transitions. Word has length 328 [2018-11-23 02:51:33,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:33,200 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 207 transitions. [2018-11-23 02:51:33,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-23 02:51:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 207 transitions. [2018-11-23 02:51:33,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2018-11-23 02:51:33,202 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:33,202 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:33,202 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:33,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:33,202 INFO L82 PathProgramCache]: Analyzing trace with hash 454376279, now seen corresponding path program 46 times [2018-11-23 02:51:33,203 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:33,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:33,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:33,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:33,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7429 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2018-11-23 02:51:33,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:33,852 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:33,861 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:51:33,928 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:51:33,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:33,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7429 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2018-11-23 02:51:34,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:34,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-11-23 02:51:34,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-11-23 02:51:34,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-11-23 02:51:34,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2018-11-23 02:51:34,041 INFO L87 Difference]: Start difference. First operand 157 states and 207 transitions. Second operand 51 states. [2018-11-23 02:51:35,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:35,014 INFO L93 Difference]: Finished difference Result 164 states and 215 transitions. [2018-11-23 02:51:35,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-23 02:51:35,014 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 335 [2018-11-23 02:51:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:35,015 INFO L225 Difference]: With dead ends: 164 [2018-11-23 02:51:35,015 INFO L226 Difference]: Without dead ends: 160 [2018-11-23 02:51:35,016 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3530, Invalid=5976, Unknown=0, NotChecked=0, Total=9506 [2018-11-23 02:51:35,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-11-23 02:51:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-11-23 02:51:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-11-23 02:51:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 211 transitions. [2018-11-23 02:51:35,034 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 211 transitions. Word has length 335 [2018-11-23 02:51:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:35,034 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 211 transitions. [2018-11-23 02:51:35,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-11-23 02:51:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 211 transitions. [2018-11-23 02:51:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-11-23 02:51:35,036 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:35,036 INFO L402 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:35,036 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:35,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:35,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1718484146, now seen corresponding path program 47 times [2018-11-23 02:51:35,037 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:35,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:35,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:35,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:35,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7755 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 4418 trivial. 0 not checked. [2018-11-23 02:51:35,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:35,702 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:35,709 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:51:35,856 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-11-23 02:51:35,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:35,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7755 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 4418 trivial. 0 not checked. [2018-11-23 02:51:35,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:35,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-11-23 02:51:35,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-23 02:51:35,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-23 02:51:35,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2018-11-23 02:51:35,977 INFO L87 Difference]: Start difference. First operand 160 states and 211 transitions. Second operand 52 states. [2018-11-23 02:51:36,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:36,869 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2018-11-23 02:51:36,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-23 02:51:36,869 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 342 [2018-11-23 02:51:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:36,870 INFO L225 Difference]: With dead ends: 167 [2018-11-23 02:51:36,870 INFO L226 Difference]: Without dead ends: 163 [2018-11-23 02:51:36,871 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3677, Invalid=6223, Unknown=0, NotChecked=0, Total=9900 [2018-11-23 02:51:36,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-11-23 02:51:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-11-23 02:51:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-11-23 02:51:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 215 transitions. [2018-11-23 02:51:36,891 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 215 transitions. Word has length 342 [2018-11-23 02:51:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:36,892 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 215 transitions. [2018-11-23 02:51:36,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-23 02:51:36,892 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 215 transitions. [2018-11-23 02:51:36,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-11-23 02:51:36,893 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:36,893 INFO L402 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:36,894 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:36,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:36,894 INFO L82 PathProgramCache]: Analyzing trace with hash 849546605, now seen corresponding path program 48 times [2018-11-23 02:51:36,894 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:36,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:36,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:36,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:36,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8088 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2018-11-23 02:51:37,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:37,590 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:37,597 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:51:37,730 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-11-23 02:51:37,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:37,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8088 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 4608 trivial. 0 not checked. [2018-11-23 02:51:37,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:37,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-11-23 02:51:37,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-11-23 02:51:37,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-11-23 02:51:37,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2018-11-23 02:51:37,841 INFO L87 Difference]: Start difference. First operand 163 states and 215 transitions. Second operand 53 states. [2018-11-23 02:51:38,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:38,828 INFO L93 Difference]: Finished difference Result 170 states and 223 transitions. [2018-11-23 02:51:38,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-11-23 02:51:38,828 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 349 [2018-11-23 02:51:38,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:38,829 INFO L225 Difference]: With dead ends: 170 [2018-11-23 02:51:38,829 INFO L226 Difference]: Without dead ends: 166 [2018-11-23 02:51:38,830 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3827, Invalid=6475, Unknown=0, NotChecked=0, Total=10302 [2018-11-23 02:51:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-11-23 02:51:38,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-11-23 02:51:38,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-11-23 02:51:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 219 transitions. [2018-11-23 02:51:38,848 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 219 transitions. Word has length 349 [2018-11-23 02:51:38,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:38,848 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 219 transitions. [2018-11-23 02:51:38,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-11-23 02:51:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 219 transitions. [2018-11-23 02:51:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2018-11-23 02:51:38,850 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:38,850 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:38,850 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:38,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:38,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1560892900, now seen corresponding path program 49 times [2018-11-23 02:51:38,850 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:38,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:38,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:38,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:38,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8428 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 4802 trivial. 0 not checked. [2018-11-23 02:51:39,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:39,599 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:39,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:39,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8428 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 4802 trivial. 0 not checked. [2018-11-23 02:51:39,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:39,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-11-23 02:51:39,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-11-23 02:51:39,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-11-23 02:51:39,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2018-11-23 02:51:39,748 INFO L87 Difference]: Start difference. First operand 166 states and 219 transitions. Second operand 54 states. [2018-11-23 02:51:40,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:40,711 INFO L93 Difference]: Finished difference Result 173 states and 227 transitions. [2018-11-23 02:51:40,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-23 02:51:40,711 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 356 [2018-11-23 02:51:40,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:40,712 INFO L225 Difference]: With dead ends: 173 [2018-11-23 02:51:40,712 INFO L226 Difference]: Without dead ends: 169 [2018-11-23 02:51:40,713 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3980, Invalid=6732, Unknown=0, NotChecked=0, Total=10712 [2018-11-23 02:51:40,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-11-23 02:51:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-11-23 02:51:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-11-23 02:51:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 223 transitions. [2018-11-23 02:51:40,729 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 223 transitions. Word has length 356 [2018-11-23 02:51:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:40,729 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 223 transitions. [2018-11-23 02:51:40,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-11-23 02:51:40,730 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 223 transitions. [2018-11-23 02:51:40,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-11-23 02:51:40,731 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:40,731 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:40,732 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:40,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:40,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1352660861, now seen corresponding path program 50 times [2018-11-23 02:51:40,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:40,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:40,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:40,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:40,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2018-11-23 02:51:41,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:41,465 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:41,472 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:51:41,531 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:51:41,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:41,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2018-11-23 02:51:41,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:41,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-11-23 02:51:41,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-11-23 02:51:41,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-11-23 02:51:41,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2018-11-23 02:51:41,653 INFO L87 Difference]: Start difference. First operand 169 states and 223 transitions. Second operand 55 states. [2018-11-23 02:51:42,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:42,678 INFO L93 Difference]: Finished difference Result 176 states and 231 transitions. [2018-11-23 02:51:42,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-11-23 02:51:42,678 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 363 [2018-11-23 02:51:42,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:42,680 INFO L225 Difference]: With dead ends: 176 [2018-11-23 02:51:42,680 INFO L226 Difference]: Without dead ends: 172 [2018-11-23 02:51:42,680 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4136, Invalid=6994, Unknown=0, NotChecked=0, Total=11130 [2018-11-23 02:51:42,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-11-23 02:51:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-11-23 02:51:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-11-23 02:51:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 227 transitions. [2018-11-23 02:51:42,698 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 227 transitions. Word has length 363 [2018-11-23 02:51:42,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:42,698 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 227 transitions. [2018-11-23 02:51:42,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-11-23 02:51:42,698 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 227 transitions. [2018-11-23 02:51:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-11-23 02:51:42,699 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:42,699 INFO L402 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:42,699 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:42,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:42,699 INFO L82 PathProgramCache]: Analyzing trace with hash -722215290, now seen corresponding path program 51 times [2018-11-23 02:51:42,700 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:42,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:42,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:42,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:42,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9129 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 5202 trivial. 0 not checked. [2018-11-23 02:51:43,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:43,443 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:43,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:51:43,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-11-23 02:51:43,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:43,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9129 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 5202 trivial. 0 not checked. [2018-11-23 02:51:43,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:43,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-11-23 02:51:43,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-11-23 02:51:43,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-11-23 02:51:43,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2018-11-23 02:51:43,736 INFO L87 Difference]: Start difference. First operand 172 states and 227 transitions. Second operand 56 states. [2018-11-23 02:51:44,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:44,833 INFO L93 Difference]: Finished difference Result 179 states and 235 transitions. [2018-11-23 02:51:44,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-23 02:51:44,833 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 370 [2018-11-23 02:51:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:44,834 INFO L225 Difference]: With dead ends: 179 [2018-11-23 02:51:44,834 INFO L226 Difference]: Without dead ends: 175 [2018-11-23 02:51:44,835 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4295, Invalid=7261, Unknown=0, NotChecked=0, Total=11556 [2018-11-23 02:51:44,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-11-23 02:51:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-11-23 02:51:44,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-11-23 02:51:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 231 transitions. [2018-11-23 02:51:44,856 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 231 transitions. Word has length 370 [2018-11-23 02:51:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:44,856 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 231 transitions. [2018-11-23 02:51:44,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-11-23 02:51:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 231 transitions. [2018-11-23 02:51:44,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-11-23 02:51:44,858 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:44,858 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:44,858 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:44,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:44,859 INFO L82 PathProgramCache]: Analyzing trace with hash -148058983, now seen corresponding path program 52 times [2018-11-23 02:51:44,859 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:44,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:44,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:44,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:44,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9490 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 5408 trivial. 0 not checked. [2018-11-23 02:51:45,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:45,675 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:45,681 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:51:45,741 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:51:45,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:45,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9490 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 5408 trivial. 0 not checked. [2018-11-23 02:51:45,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:45,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-11-23 02:51:45,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-11-23 02:51:45,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-11-23 02:51:45,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=1703, Unknown=0, NotChecked=0, Total=3192 [2018-11-23 02:51:45,837 INFO L87 Difference]: Start difference. First operand 175 states and 231 transitions. Second operand 57 states. [2018-11-23 02:51:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:46,989 INFO L93 Difference]: Finished difference Result 182 states and 239 transitions. [2018-11-23 02:51:46,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-11-23 02:51:46,990 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 377 [2018-11-23 02:51:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:46,991 INFO L225 Difference]: With dead ends: 182 [2018-11-23 02:51:46,991 INFO L226 Difference]: Without dead ends: 178 [2018-11-23 02:51:46,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4457, Invalid=7533, Unknown=0, NotChecked=0, Total=11990 [2018-11-23 02:51:46,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-11-23 02:51:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-11-23 02:51:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-11-23 02:51:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 235 transitions. [2018-11-23 02:51:47,011 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 235 transitions. Word has length 377 [2018-11-23 02:51:47,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:47,012 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 235 transitions. [2018-11-23 02:51:47,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-11-23 02:51:47,012 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 235 transitions. [2018-11-23 02:51:47,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2018-11-23 02:51:47,014 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:47,014 INFO L402 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:47,014 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:47,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:47,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2088040944, now seen corresponding path program 53 times [2018-11-23 02:51:47,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:47,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:47,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:47,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:47,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 5618 trivial. 0 not checked. [2018-11-23 02:51:47,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:47,855 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:47,862 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:51:48,048 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-11-23 02:51:48,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:48,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9858 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 5618 trivial. 0 not checked. [2018-11-23 02:51:48,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:48,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-11-23 02:51:48,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-11-23 02:51:48,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-11-23 02:51:48,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=1762, Unknown=0, NotChecked=0, Total=3306 [2018-11-23 02:51:48,167 INFO L87 Difference]: Start difference. First operand 178 states and 235 transitions. Second operand 58 states. [2018-11-23 02:51:49,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:49,360 INFO L93 Difference]: Finished difference Result 185 states and 243 transitions. [2018-11-23 02:51:49,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-23 02:51:49,361 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 384 [2018-11-23 02:51:49,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:49,362 INFO L225 Difference]: With dead ends: 185 [2018-11-23 02:51:49,362 INFO L226 Difference]: Without dead ends: 181 [2018-11-23 02:51:49,363 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4622, Invalid=7810, Unknown=0, NotChecked=0, Total=12432 [2018-11-23 02:51:49,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-11-23 02:51:49,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-11-23 02:51:49,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-11-23 02:51:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 239 transitions. [2018-11-23 02:51:49,386 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 239 transitions. Word has length 384 [2018-11-23 02:51:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:49,386 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 239 transitions. [2018-11-23 02:51:49,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-11-23 02:51:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 239 transitions. [2018-11-23 02:51:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2018-11-23 02:51:49,388 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:49,388 INFO L402 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:49,388 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:49,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1685456465, now seen corresponding path program 54 times [2018-11-23 02:51:49,389 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:49,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:49,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:49,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:49,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10233 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2018-11-23 02:51:50,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:50,271 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:50,277 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:51:50,422 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-11-23 02:51:50,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:50,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10233 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2018-11-23 02:51:50,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:50,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-11-23 02:51:50,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-11-23 02:51:50,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-11-23 02:51:50,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2018-11-23 02:51:50,517 INFO L87 Difference]: Start difference. First operand 181 states and 239 transitions. Second operand 59 states. [2018-11-23 02:51:51,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:51,752 INFO L93 Difference]: Finished difference Result 188 states and 247 transitions. [2018-11-23 02:51:51,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-11-23 02:51:51,752 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 391 [2018-11-23 02:51:51,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:51,753 INFO L225 Difference]: With dead ends: 188 [2018-11-23 02:51:51,753 INFO L226 Difference]: Without dead ends: 184 [2018-11-23 02:51:51,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4790, Invalid=8092, Unknown=0, NotChecked=0, Total=12882 [2018-11-23 02:51:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-11-23 02:51:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2018-11-23 02:51:51,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-11-23 02:51:51,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 243 transitions. [2018-11-23 02:51:51,785 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 243 transitions. Word has length 391 [2018-11-23 02:51:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:51,786 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 243 transitions. [2018-11-23 02:51:51,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-11-23 02:51:51,786 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 243 transitions. [2018-11-23 02:51:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-11-23 02:51:51,788 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:51,792 INFO L402 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:51,792 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:51,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1628873638, now seen corresponding path program 55 times [2018-11-23 02:51:51,793 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:51,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:51,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:51,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:51,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10615 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2018-11-23 02:51:52,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:52,689 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:52,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:52,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10615 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2018-11-23 02:51:52,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:52,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-11-23 02:51:52,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-11-23 02:51:52,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-11-23 02:51:52,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=1883, Unknown=0, NotChecked=0, Total=3540 [2018-11-23 02:51:52,867 INFO L87 Difference]: Start difference. First operand 184 states and 243 transitions. Second operand 60 states. [2018-11-23 02:51:54,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:54,163 INFO L93 Difference]: Finished difference Result 191 states and 251 transitions. [2018-11-23 02:51:54,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-23 02:51:54,164 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 398 [2018-11-23 02:51:54,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:54,165 INFO L225 Difference]: With dead ends: 191 [2018-11-23 02:51:54,165 INFO L226 Difference]: Without dead ends: 187 [2018-11-23 02:51:54,166 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4961, Invalid=8379, Unknown=0, NotChecked=0, Total=13340 [2018-11-23 02:51:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-11-23 02:51:54,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-11-23 02:51:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-11-23 02:51:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 247 transitions. [2018-11-23 02:51:54,189 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 247 transitions. Word has length 398 [2018-11-23 02:51:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:54,189 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 247 transitions. [2018-11-23 02:51:54,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-11-23 02:51:54,189 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 247 transitions. [2018-11-23 02:51:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2018-11-23 02:51:54,191 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:54,191 INFO L402 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:54,191 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:54,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:54,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1214763067, now seen corresponding path program 56 times [2018-11-23 02:51:54,191 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:54,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:54,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:54,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:51:54,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11004 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 6272 trivial. 0 not checked. [2018-11-23 02:51:55,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:55,168 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:55,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:51:55,241 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:51:55,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:55,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11004 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 6272 trivial. 0 not checked. [2018-11-23 02:51:55,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:55,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-11-23 02:51:55,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-11-23 02:51:55,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-11-23 02:51:55,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2018-11-23 02:51:55,346 INFO L87 Difference]: Start difference. First operand 187 states and 247 transitions. Second operand 61 states. [2018-11-23 02:51:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:56,624 INFO L93 Difference]: Finished difference Result 194 states and 255 transitions. [2018-11-23 02:51:56,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-11-23 02:51:56,624 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 405 [2018-11-23 02:51:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:56,626 INFO L225 Difference]: With dead ends: 194 [2018-11-23 02:51:56,626 INFO L226 Difference]: Without dead ends: 190 [2018-11-23 02:51:56,627 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5135, Invalid=8671, Unknown=0, NotChecked=0, Total=13806 [2018-11-23 02:51:56,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-11-23 02:51:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2018-11-23 02:51:56,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-11-23 02:51:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 251 transitions. [2018-11-23 02:51:56,654 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 251 transitions. Word has length 405 [2018-11-23 02:51:56,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:56,654 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 251 transitions. [2018-11-23 02:51:56,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-11-23 02:51:56,654 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 251 transitions. [2018-11-23 02:51:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-11-23 02:51:56,656 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:56,656 INFO L402 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:56,657 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:56,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:56,657 INFO L82 PathProgramCache]: Analyzing trace with hash -383752764, now seen corresponding path program 57 times [2018-11-23 02:51:56,657 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:56,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:56,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:56,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:56,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:51:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 6498 trivial. 0 not checked. [2018-11-23 02:51:57,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:51:57,633 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:51:57,641 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:51:57,830 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-11-23 02:51:57,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:51:57,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:51:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 6498 trivial. 0 not checked. [2018-11-23 02:51:57,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:51:57,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-11-23 02:51:57,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-11-23 02:51:57,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-11-23 02:51:57,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=2008, Unknown=0, NotChecked=0, Total=3782 [2018-11-23 02:51:57,942 INFO L87 Difference]: Start difference. First operand 190 states and 251 transitions. Second operand 62 states. [2018-11-23 02:51:59,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:51:59,228 INFO L93 Difference]: Finished difference Result 197 states and 259 transitions. [2018-11-23 02:51:59,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-11-23 02:51:59,228 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 412 [2018-11-23 02:51:59,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:51:59,230 INFO L225 Difference]: With dead ends: 197 [2018-11-23 02:51:59,230 INFO L226 Difference]: Without dead ends: 193 [2018-11-23 02:51:59,231 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5312, Invalid=8968, Unknown=0, NotChecked=0, Total=14280 [2018-11-23 02:51:59,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-11-23 02:51:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-11-23 02:51:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-11-23 02:51:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 255 transitions. [2018-11-23 02:51:59,254 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 255 transitions. Word has length 412 [2018-11-23 02:51:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:51:59,254 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 255 transitions. [2018-11-23 02:51:59,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-11-23 02:51:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 255 transitions. [2018-11-23 02:51:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2018-11-23 02:51:59,256 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:51:59,257 INFO L402 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:51:59,257 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:51:59,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:51:59,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1310199515, now seen corresponding path program 58 times [2018-11-23 02:51:59,257 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:51:59,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:51:59,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:59,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:51:59,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:51:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11803 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 6728 trivial. 0 not checked. [2018-11-23 02:52:00,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:00,259 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:00,267 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:52:00,338 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:52:00,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:00,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11803 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 6728 trivial. 0 not checked. [2018-11-23 02:52:00,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:00,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-11-23 02:52:00,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-11-23 02:52:00,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-11-23 02:52:00,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=2072, Unknown=0, NotChecked=0, Total=3906 [2018-11-23 02:52:00,480 INFO L87 Difference]: Start difference. First operand 193 states and 255 transitions. Second operand 63 states. [2018-11-23 02:52:01,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:01,898 INFO L93 Difference]: Finished difference Result 200 states and 263 transitions. [2018-11-23 02:52:01,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-11-23 02:52:01,898 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 419 [2018-11-23 02:52:01,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:01,899 INFO L225 Difference]: With dead ends: 200 [2018-11-23 02:52:01,899 INFO L226 Difference]: Without dead ends: 196 [2018-11-23 02:52:01,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5492, Invalid=9270, Unknown=0, NotChecked=0, Total=14762 [2018-11-23 02:52:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-11-23 02:52:01,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-11-23 02:52:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-11-23 02:52:01,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 259 transitions. [2018-11-23 02:52:01,930 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 259 transitions. Word has length 419 [2018-11-23 02:52:01,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:01,930 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 259 transitions. [2018-11-23 02:52:01,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-11-23 02:52:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 259 transitions. [2018-11-23 02:52:01,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-11-23 02:52:01,931 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:01,931 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:01,932 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:01,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:01,932 INFO L82 PathProgramCache]: Analyzing trace with hash -783714770, now seen corresponding path program 59 times [2018-11-23 02:52:01,932 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:01,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:01,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:01,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:01,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12213 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 6962 trivial. 0 not checked. [2018-11-23 02:52:02,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:02,933 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:02,941 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:52:03,165 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-11-23 02:52:03,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:03,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12213 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 6962 trivial. 0 not checked. [2018-11-23 02:52:03,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:03,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-11-23 02:52:03,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-11-23 02:52:03,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-11-23 02:52:03,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=2137, Unknown=0, NotChecked=0, Total=4032 [2018-11-23 02:52:03,286 INFO L87 Difference]: Start difference. First operand 196 states and 259 transitions. Second operand 64 states. [2018-11-23 02:52:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:04,716 INFO L93 Difference]: Finished difference Result 203 states and 267 transitions. [2018-11-23 02:52:04,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-11-23 02:52:04,716 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 426 [2018-11-23 02:52:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:04,718 INFO L225 Difference]: With dead ends: 203 [2018-11-23 02:52:04,718 INFO L226 Difference]: Without dead ends: 199 [2018-11-23 02:52:04,719 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5675, Invalid=9577, Unknown=0, NotChecked=0, Total=15252 [2018-11-23 02:52:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-11-23 02:52:04,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-11-23 02:52:04,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-11-23 02:52:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 263 transitions. [2018-11-23 02:52:04,747 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 263 transitions. Word has length 426 [2018-11-23 02:52:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:04,747 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 263 transitions. [2018-11-23 02:52:04,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-11-23 02:52:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 263 transitions. [2018-11-23 02:52:04,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2018-11-23 02:52:04,749 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:04,750 INFO L402 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:04,750 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:04,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:04,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1486211343, now seen corresponding path program 60 times [2018-11-23 02:52:04,750 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:04,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:04,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:04,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:04,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12630 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2018-11-23 02:52:05,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:05,809 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:05,817 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:52:06,024 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-11-23 02:52:06,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:06,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12630 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2018-11-23 02:52:06,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:06,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-11-23 02:52:06,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-11-23 02:52:06,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-11-23 02:52:06,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2018-11-23 02:52:06,153 INFO L87 Difference]: Start difference. First operand 199 states and 263 transitions. Second operand 65 states. [2018-11-23 02:52:07,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:07,626 INFO L93 Difference]: Finished difference Result 206 states and 271 transitions. [2018-11-23 02:52:07,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-11-23 02:52:07,627 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 433 [2018-11-23 02:52:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:07,627 INFO L225 Difference]: With dead ends: 206 [2018-11-23 02:52:07,628 INFO L226 Difference]: Without dead ends: 202 [2018-11-23 02:52:07,628 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5861, Invalid=9889, Unknown=0, NotChecked=0, Total=15750 [2018-11-23 02:52:07,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-11-23 02:52:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2018-11-23 02:52:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-11-23 02:52:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 267 transitions. [2018-11-23 02:52:07,666 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 267 transitions. Word has length 433 [2018-11-23 02:52:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:07,667 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 267 transitions. [2018-11-23 02:52:07,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-11-23 02:52:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 267 transitions. [2018-11-23 02:52:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-11-23 02:52:07,669 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:07,670 INFO L402 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:07,670 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:07,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:07,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1191973480, now seen corresponding path program 61 times [2018-11-23 02:52:07,670 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:07,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:07,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:07,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:07,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13054 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 7442 trivial. 0 not checked. [2018-11-23 02:52:08,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:08,738 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:08,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:52:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:08,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13054 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 7442 trivial. 0 not checked. [2018-11-23 02:52:08,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:08,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-11-23 02:52:08,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-11-23 02:52:08,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-11-23 02:52:08,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=2270, Unknown=0, NotChecked=0, Total=4290 [2018-11-23 02:52:08,943 INFO L87 Difference]: Start difference. First operand 202 states and 267 transitions. Second operand 66 states. [2018-11-23 02:52:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:10,466 INFO L93 Difference]: Finished difference Result 209 states and 275 transitions. [2018-11-23 02:52:10,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-11-23 02:52:10,467 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 440 [2018-11-23 02:52:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:10,467 INFO L225 Difference]: With dead ends: 209 [2018-11-23 02:52:10,468 INFO L226 Difference]: Without dead ends: 205 [2018-11-23 02:52:10,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6050, Invalid=10206, Unknown=0, NotChecked=0, Total=16256 [2018-11-23 02:52:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-11-23 02:52:10,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-11-23 02:52:10,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-11-23 02:52:10,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 271 transitions. [2018-11-23 02:52:10,498 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 271 transitions. Word has length 440 [2018-11-23 02:52:10,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:10,499 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 271 transitions. [2018-11-23 02:52:10,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-11-23 02:52:10,499 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 271 transitions. [2018-11-23 02:52:10,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-11-23 02:52:10,500 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:10,500 INFO L402 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:10,500 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:10,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:10,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1349564409, now seen corresponding path program 62 times [2018-11-23 02:52:10,501 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:10,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:10,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:10,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:52:10,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 7688 trivial. 0 not checked. [2018-11-23 02:52:11,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:11,613 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:11,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:52:11,698 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:52:11,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:11,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 7688 trivial. 0 not checked. [2018-11-23 02:52:11,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:11,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-11-23 02:52:11,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-11-23 02:52:11,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-11-23 02:52:11,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2018-11-23 02:52:11,819 INFO L87 Difference]: Start difference. First operand 205 states and 271 transitions. Second operand 67 states. [2018-11-23 02:52:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:13,387 INFO L93 Difference]: Finished difference Result 212 states and 279 transitions. [2018-11-23 02:52:13,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-11-23 02:52:13,388 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 447 [2018-11-23 02:52:13,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:13,389 INFO L225 Difference]: With dead ends: 212 [2018-11-23 02:52:13,389 INFO L226 Difference]: Without dead ends: 208 [2018-11-23 02:52:13,390 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6242, Invalid=10528, Unknown=0, NotChecked=0, Total=16770 [2018-11-23 02:52:13,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-11-23 02:52:13,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-11-23 02:52:13,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-11-23 02:52:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 275 transitions. [2018-11-23 02:52:13,430 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 275 transitions. Word has length 447 [2018-11-23 02:52:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:13,430 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 275 transitions. [2018-11-23 02:52:13,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-11-23 02:52:13,430 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 275 transitions. [2018-11-23 02:52:13,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2018-11-23 02:52:13,432 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:13,432 INFO L402 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:13,432 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:13,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:13,432 INFO L82 PathProgramCache]: Analyzing trace with hash 252652546, now seen corresponding path program 63 times [2018-11-23 02:52:13,432 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:13,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:13,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:13,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:13,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 13923 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 7938 trivial. 0 not checked. [2018-11-23 02:52:14,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:14,605 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:14,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:52:14,907 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-11-23 02:52:14,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:14,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13923 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 7938 trivial. 0 not checked. [2018-11-23 02:52:15,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:15,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-11-23 02:52:15,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-11-23 02:52:15,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-11-23 02:52:15,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=2407, Unknown=0, NotChecked=0, Total=4556 [2018-11-23 02:52:15,027 INFO L87 Difference]: Start difference. First operand 208 states and 275 transitions. Second operand 68 states. [2018-11-23 02:52:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:16,642 INFO L93 Difference]: Finished difference Result 215 states and 283 transitions. [2018-11-23 02:52:16,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-11-23 02:52:16,643 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 454 [2018-11-23 02:52:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:16,643 INFO L225 Difference]: With dead ends: 215 [2018-11-23 02:52:16,643 INFO L226 Difference]: Without dead ends: 211 [2018-11-23 02:52:16,644 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6437, Invalid=10855, Unknown=0, NotChecked=0, Total=17292 [2018-11-23 02:52:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-11-23 02:52:16,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-11-23 02:52:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-11-23 02:52:16,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 279 transitions. [2018-11-23 02:52:16,675 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 279 transitions. Word has length 454 [2018-11-23 02:52:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:16,675 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 279 transitions. [2018-11-23 02:52:16,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-11-23 02:52:16,675 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 279 transitions. [2018-11-23 02:52:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2018-11-23 02:52:16,676 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:16,676 INFO L402 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:16,677 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:16,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:16,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1411899933, now seen corresponding path program 64 times [2018-11-23 02:52:16,677 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:16,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:16,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:16,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:16,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14368 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 8192 trivial. 0 not checked. [2018-11-23 02:52:17,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:17,837 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:17,844 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:52:17,934 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:52:17,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:17,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14368 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 8192 trivial. 0 not checked. [2018-11-23 02:52:18,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:18,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-11-23 02:52:18,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-11-23 02:52:18,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-11-23 02:52:18,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2018-11-23 02:52:18,064 INFO L87 Difference]: Start difference. First operand 211 states and 279 transitions. Second operand 69 states. [2018-11-23 02:52:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:19,831 INFO L93 Difference]: Finished difference Result 218 states and 287 transitions. [2018-11-23 02:52:19,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-11-23 02:52:19,831 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 461 [2018-11-23 02:52:19,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:19,832 INFO L225 Difference]: With dead ends: 218 [2018-11-23 02:52:19,832 INFO L226 Difference]: Without dead ends: 214 [2018-11-23 02:52:19,833 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6635, Invalid=11187, Unknown=0, NotChecked=0, Total=17822 [2018-11-23 02:52:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-11-23 02:52:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2018-11-23 02:52:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-11-23 02:52:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 283 transitions. [2018-11-23 02:52:19,867 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 283 transitions. Word has length 461 [2018-11-23 02:52:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:19,867 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 283 transitions. [2018-11-23 02:52:19,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-11-23 02:52:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 283 transitions. [2018-11-23 02:52:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2018-11-23 02:52:19,869 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:19,869 INFO L402 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:19,869 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:19,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1911198060, now seen corresponding path program 65 times [2018-11-23 02:52:19,869 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:19,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:19,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:19,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:19,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14820 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 8450 trivial. 0 not checked. [2018-11-23 02:52:21,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:21,080 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:21,096 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:52:21,377 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-11-23 02:52:21,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:21,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14820 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 8450 trivial. 0 not checked. [2018-11-23 02:52:21,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:21,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-11-23 02:52:21,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-11-23 02:52:21,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-11-23 02:52:21,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=2548, Unknown=0, NotChecked=0, Total=4830 [2018-11-23 02:52:21,519 INFO L87 Difference]: Start difference. First operand 214 states and 283 transitions. Second operand 70 states. [2018-11-23 02:52:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:23,179 INFO L93 Difference]: Finished difference Result 221 states and 291 transitions. [2018-11-23 02:52:23,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-11-23 02:52:23,179 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 468 [2018-11-23 02:52:23,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:23,180 INFO L225 Difference]: With dead ends: 221 [2018-11-23 02:52:23,180 INFO L226 Difference]: Without dead ends: 217 [2018-11-23 02:52:23,181 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6836, Invalid=11524, Unknown=0, NotChecked=0, Total=18360 [2018-11-23 02:52:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-11-23 02:52:23,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-11-23 02:52:23,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-11-23 02:52:23,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 287 transitions. [2018-11-23 02:52:23,216 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 287 transitions. Word has length 468 [2018-11-23 02:52:23,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:23,217 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 287 transitions. [2018-11-23 02:52:23,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-11-23 02:52:23,217 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 287 transitions. [2018-11-23 02:52:23,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2018-11-23 02:52:23,220 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:23,220 INFO L402 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:23,220 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:23,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:23,220 INFO L82 PathProgramCache]: Analyzing trace with hash -495672013, now seen corresponding path program 66 times [2018-11-23 02:52:23,221 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:23,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:23,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:23,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:23,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15279 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 8712 trivial. 0 not checked. [2018-11-23 02:52:24,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:24,540 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:24,547 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:52:24,780 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-11-23 02:52:24,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:24,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15279 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 8712 trivial. 0 not checked. [2018-11-23 02:52:24,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:24,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-11-23 02:52:24,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-11-23 02:52:24,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-11-23 02:52:24,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2018-11-23 02:52:24,918 INFO L87 Difference]: Start difference. First operand 217 states and 287 transitions. Second operand 71 states. [2018-11-23 02:52:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:26,723 INFO L93 Difference]: Finished difference Result 224 states and 295 transitions. [2018-11-23 02:52:26,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-11-23 02:52:26,723 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 475 [2018-11-23 02:52:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:26,724 INFO L225 Difference]: With dead ends: 224 [2018-11-23 02:52:26,725 INFO L226 Difference]: Without dead ends: 220 [2018-11-23 02:52:26,726 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7040, Invalid=11866, Unknown=0, NotChecked=0, Total=18906 [2018-11-23 02:52:26,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-11-23 02:52:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2018-11-23 02:52:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-11-23 02:52:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 291 transitions. [2018-11-23 02:52:26,765 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 291 transitions. Word has length 475 [2018-11-23 02:52:26,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:26,765 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 291 transitions. [2018-11-23 02:52:26,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-11-23 02:52:26,765 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 291 transitions. [2018-11-23 02:52:26,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2018-11-23 02:52:26,768 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:26,768 INFO L402 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:26,768 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:26,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:26,768 INFO L82 PathProgramCache]: Analyzing trace with hash -785023530, now seen corresponding path program 67 times [2018-11-23 02:52:26,768 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:26,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:26,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:26,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:26,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15745 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 8978 trivial. 0 not checked. [2018-11-23 02:52:28,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:28,077 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:28,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:52:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:28,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 15745 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 8978 trivial. 0 not checked. [2018-11-23 02:52:28,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:28,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-11-23 02:52:28,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-11-23 02:52:28,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-11-23 02:52:28,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=2693, Unknown=0, NotChecked=0, Total=5112 [2018-11-23 02:52:28,313 INFO L87 Difference]: Start difference. First operand 220 states and 291 transitions. Second operand 72 states. [2018-11-23 02:52:30,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:30,213 INFO L93 Difference]: Finished difference Result 227 states and 299 transitions. [2018-11-23 02:52:30,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-11-23 02:52:30,213 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 482 [2018-11-23 02:52:30,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:30,214 INFO L225 Difference]: With dead ends: 227 [2018-11-23 02:52:30,214 INFO L226 Difference]: Without dead ends: 223 [2018-11-23 02:52:30,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7247, Invalid=12213, Unknown=0, NotChecked=0, Total=19460 [2018-11-23 02:52:30,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-11-23 02:52:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-11-23 02:52:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-11-23 02:52:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 295 transitions. [2018-11-23 02:52:30,271 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 295 transitions. Word has length 482 [2018-11-23 02:52:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:30,271 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 295 transitions. [2018-11-23 02:52:30,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-11-23 02:52:30,271 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 295 transitions. [2018-11-23 02:52:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2018-11-23 02:52:30,274 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:30,274 INFO L402 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:30,274 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:30,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:30,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1700147529, now seen corresponding path program 68 times [2018-11-23 02:52:30,274 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:30,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:30,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:30,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:52:30,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16218 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 9248 trivial. 0 not checked. [2018-11-23 02:52:31,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:31,600 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:31,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:52:31,700 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:52:31,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:31,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16218 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 9248 trivial. 0 not checked. [2018-11-23 02:52:31,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:31,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-11-23 02:52:31,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-11-23 02:52:31,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-11-23 02:52:31,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2018-11-23 02:52:31,861 INFO L87 Difference]: Start difference. First operand 223 states and 295 transitions. Second operand 73 states. [2018-11-23 02:52:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:33,773 INFO L93 Difference]: Finished difference Result 230 states and 303 transitions. [2018-11-23 02:52:33,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-11-23 02:52:33,774 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 489 [2018-11-23 02:52:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:33,775 INFO L225 Difference]: With dead ends: 230 [2018-11-23 02:52:33,775 INFO L226 Difference]: Without dead ends: 226 [2018-11-23 02:52:33,775 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7457, Invalid=12565, Unknown=0, NotChecked=0, Total=20022 [2018-11-23 02:52:33,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-11-23 02:52:33,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-11-23 02:52:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-11-23 02:52:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 299 transitions. [2018-11-23 02:52:33,815 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 299 transitions. Word has length 489 [2018-11-23 02:52:33,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:33,815 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 299 transitions. [2018-11-23 02:52:33,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-11-23 02:52:33,816 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 299 transitions. [2018-11-23 02:52:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2018-11-23 02:52:33,817 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:33,817 INFO L402 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:33,817 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:33,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:33,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1879092928, now seen corresponding path program 69 times [2018-11-23 02:52:33,818 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:33,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:33,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:33,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:33,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16698 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 9522 trivial. 0 not checked. [2018-11-23 02:52:35,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:35,194 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:35,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:52:35,480 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-11-23 02:52:35,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:35,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16698 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 9522 trivial. 0 not checked. [2018-11-23 02:52:35,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:35,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-11-23 02:52:35,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-11-23 02:52:35,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-11-23 02:52:35,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=2842, Unknown=0, NotChecked=0, Total=5402 [2018-11-23 02:52:35,631 INFO L87 Difference]: Start difference. First operand 226 states and 299 transitions. Second operand 74 states. [2018-11-23 02:52:37,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:37,520 INFO L93 Difference]: Finished difference Result 233 states and 307 transitions. [2018-11-23 02:52:37,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-11-23 02:52:37,520 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 496 [2018-11-23 02:52:37,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:37,521 INFO L225 Difference]: With dead ends: 233 [2018-11-23 02:52:37,522 INFO L226 Difference]: Without dead ends: 229 [2018-11-23 02:52:37,522 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 566 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7670, Invalid=12922, Unknown=0, NotChecked=0, Total=20592 [2018-11-23 02:52:37,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-11-23 02:52:37,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-11-23 02:52:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-11-23 02:52:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 303 transitions. [2018-11-23 02:52:37,565 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 303 transitions. Word has length 496 [2018-11-23 02:52:37,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:37,565 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 303 transitions. [2018-11-23 02:52:37,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-11-23 02:52:37,565 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 303 transitions. [2018-11-23 02:52:37,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2018-11-23 02:52:37,567 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:37,567 INFO L402 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:37,567 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:37,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:37,568 INFO L82 PathProgramCache]: Analyzing trace with hash 55387743, now seen corresponding path program 70 times [2018-11-23 02:52:37,568 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:37,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:37,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:37,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:37,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17185 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 9800 trivial. 0 not checked. [2018-11-23 02:52:38,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:38,996 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:39,004 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:52:39,093 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:52:39,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:39,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17185 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 9800 trivial. 0 not checked. [2018-11-23 02:52:39,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:39,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-11-23 02:52:39,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-11-23 02:52:39,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-11-23 02:52:39,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2632, Invalid=2918, Unknown=0, NotChecked=0, Total=5550 [2018-11-23 02:52:39,254 INFO L87 Difference]: Start difference. First operand 229 states and 303 transitions. Second operand 75 states. [2018-11-23 02:52:41,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:41,299 INFO L93 Difference]: Finished difference Result 236 states and 311 transitions. [2018-11-23 02:52:41,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-11-23 02:52:41,299 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 503 [2018-11-23 02:52:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:41,300 INFO L225 Difference]: With dead ends: 236 [2018-11-23 02:52:41,301 INFO L226 Difference]: Without dead ends: 232 [2018-11-23 02:52:41,302 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7886, Invalid=13284, Unknown=0, NotChecked=0, Total=21170 [2018-11-23 02:52:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-11-23 02:52:41,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2018-11-23 02:52:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-11-23 02:52:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 307 transitions. [2018-11-23 02:52:41,348 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 307 transitions. Word has length 503 [2018-11-23 02:52:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:41,348 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 307 transitions. [2018-11-23 02:52:41,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-11-23 02:52:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 307 transitions. [2018-11-23 02:52:41,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2018-11-23 02:52:41,350 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:41,351 INFO L402 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:41,351 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:41,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:41,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1497928790, now seen corresponding path program 71 times [2018-11-23 02:52:41,351 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:41,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:41,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:41,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:41,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17679 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 10082 trivial. 0 not checked. [2018-11-23 02:52:42,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:42,810 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:42,818 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:52:43,165 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-11-23 02:52:43,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:43,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17679 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 10082 trivial. 0 not checked. [2018-11-23 02:52:43,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:43,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-11-23 02:52:43,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-11-23 02:52:43,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-11-23 02:52:43,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=2995, Unknown=0, NotChecked=0, Total=5700 [2018-11-23 02:52:43,345 INFO L87 Difference]: Start difference. First operand 232 states and 307 transitions. Second operand 76 states. [2018-11-23 02:52:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:45,472 INFO L93 Difference]: Finished difference Result 239 states and 315 transitions. [2018-11-23 02:52:45,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-11-23 02:52:45,473 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 510 [2018-11-23 02:52:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:45,474 INFO L225 Difference]: With dead ends: 239 [2018-11-23 02:52:45,474 INFO L226 Difference]: Without dead ends: 235 [2018-11-23 02:52:45,475 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8105, Invalid=13651, Unknown=0, NotChecked=0, Total=21756 [2018-11-23 02:52:45,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-11-23 02:52:45,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-11-23 02:52:45,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-11-23 02:52:45,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 311 transitions. [2018-11-23 02:52:45,521 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 311 transitions. Word has length 510 [2018-11-23 02:52:45,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:45,521 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 311 transitions. [2018-11-23 02:52:45,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-11-23 02:52:45,521 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 311 transitions. [2018-11-23 02:52:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2018-11-23 02:52:45,523 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:45,523 INFO L402 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:45,523 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:45,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:45,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1551508597, now seen corresponding path program 72 times [2018-11-23 02:52:45,523 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:45,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:45,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:45,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:45,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18180 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 10368 trivial. 0 not checked. [2018-11-23 02:52:47,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:47,042 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:47,052 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:52:47,368 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-11-23 02:52:47,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:47,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18180 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 10368 trivial. 0 not checked. [2018-11-23 02:52:47,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:47,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-11-23 02:52:47,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-11-23 02:52:47,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-11-23 02:52:47,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2779, Invalid=3073, Unknown=0, NotChecked=0, Total=5852 [2018-11-23 02:52:47,528 INFO L87 Difference]: Start difference. First operand 235 states and 311 transitions. Second operand 77 states. [2018-11-23 02:52:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:49,681 INFO L93 Difference]: Finished difference Result 242 states and 319 transitions. [2018-11-23 02:52:49,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-11-23 02:52:49,681 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 517 [2018-11-23 02:52:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:49,682 INFO L225 Difference]: With dead ends: 242 [2018-11-23 02:52:49,682 INFO L226 Difference]: Without dead ends: 238 [2018-11-23 02:52:49,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 738 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8327, Invalid=14023, Unknown=0, NotChecked=0, Total=22350 [2018-11-23 02:52:49,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-11-23 02:52:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2018-11-23 02:52:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-11-23 02:52:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 315 transitions. [2018-11-23 02:52:49,728 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 315 transitions. Word has length 517 [2018-11-23 02:52:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:49,729 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 315 transitions. [2018-11-23 02:52:49,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-11-23 02:52:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 315 transitions. [2018-11-23 02:52:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2018-11-23 02:52:49,731 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:49,731 INFO L402 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:49,731 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:49,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:49,731 INFO L82 PathProgramCache]: Analyzing trace with hash -986895084, now seen corresponding path program 73 times [2018-11-23 02:52:49,731 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:49,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:49,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:49,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:49,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18688 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 10658 trivial. 0 not checked. [2018-11-23 02:52:51,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:51,284 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:51,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:52:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:51,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18688 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 10658 trivial. 0 not checked. [2018-11-23 02:52:51,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:51,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-11-23 02:52:51,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-11-23 02:52:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-11-23 02:52:51,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2854, Invalid=3152, Unknown=0, NotChecked=0, Total=6006 [2018-11-23 02:52:51,553 INFO L87 Difference]: Start difference. First operand 238 states and 315 transitions. Second operand 78 states. [2018-11-23 02:52:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:53,730 INFO L93 Difference]: Finished difference Result 245 states and 323 transitions. [2018-11-23 02:52:53,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-11-23 02:52:53,731 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 524 [2018-11-23 02:52:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:53,731 INFO L225 Difference]: With dead ends: 245 [2018-11-23 02:52:53,732 INFO L226 Difference]: Without dead ends: 241 [2018-11-23 02:52:53,732 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8552, Invalid=14400, Unknown=0, NotChecked=0, Total=22952 [2018-11-23 02:52:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-11-23 02:52:53,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-11-23 02:52:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-11-23 02:52:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 319 transitions. [2018-11-23 02:52:53,780 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 319 transitions. Word has length 524 [2018-11-23 02:52:53,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:53,780 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 319 transitions. [2018-11-23 02:52:53,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-11-23 02:52:53,780 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 319 transitions. [2018-11-23 02:52:53,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-11-23 02:52:53,782 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:53,782 INFO L402 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:53,782 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:53,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:53,782 INFO L82 PathProgramCache]: Analyzing trace with hash -392311925, now seen corresponding path program 74 times [2018-11-23 02:52:53,782 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:53,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:53,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:53,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:52:53,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 19203 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 10952 trivial. 0 not checked. [2018-11-23 02:52:55,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:55,355 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:55,363 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:52:55,452 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:52:55,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:55,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:52:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 19203 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 10952 trivial. 0 not checked. [2018-11-23 02:52:55,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:52:55,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-11-23 02:52:55,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-11-23 02:52:55,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-11-23 02:52:55,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2930, Invalid=3232, Unknown=0, NotChecked=0, Total=6162 [2018-11-23 02:52:55,622 INFO L87 Difference]: Start difference. First operand 241 states and 319 transitions. Second operand 79 states. [2018-11-23 02:52:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:52:57,873 INFO L93 Difference]: Finished difference Result 248 states and 327 transitions. [2018-11-23 02:52:57,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-11-23 02:52:57,873 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 531 [2018-11-23 02:52:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:52:57,875 INFO L225 Difference]: With dead ends: 248 [2018-11-23 02:52:57,875 INFO L226 Difference]: Without dead ends: 244 [2018-11-23 02:52:57,877 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8780, Invalid=14782, Unknown=0, NotChecked=0, Total=23562 [2018-11-23 02:52:57,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-11-23 02:52:57,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-11-23 02:52:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-11-23 02:52:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 323 transitions. [2018-11-23 02:52:57,930 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 323 transitions. Word has length 531 [2018-11-23 02:52:57,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:52:57,930 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 323 transitions. [2018-11-23 02:52:57,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-11-23 02:52:57,930 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 323 transitions. [2018-11-23 02:52:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2018-11-23 02:52:57,933 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:52:57,933 INFO L402 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:52:57,934 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:52:57,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:52:57,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1955591550, now seen corresponding path program 75 times [2018-11-23 02:52:57,934 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:52:57,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:52:57,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:57,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:52:57,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:52:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:52:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 19725 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 11250 trivial. 0 not checked. [2018-11-23 02:52:59,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:52:59,567 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:52:59,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:52:59,890 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-11-23 02:52:59,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:52:59,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:53:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 19725 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 11250 trivial. 0 not checked. [2018-11-23 02:53:00,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:53:00,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-11-23 02:53:00,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-11-23 02:53:00,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-11-23 02:53:00,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3007, Invalid=3313, Unknown=0, NotChecked=0, Total=6320 [2018-11-23 02:53:00,060 INFO L87 Difference]: Start difference. First operand 244 states and 323 transitions. Second operand 80 states. [2018-11-23 02:53:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:53:02,376 INFO L93 Difference]: Finished difference Result 251 states and 331 transitions. [2018-11-23 02:53:02,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-11-23 02:53:02,376 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 538 [2018-11-23 02:53:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:53:02,377 INFO L225 Difference]: With dead ends: 251 [2018-11-23 02:53:02,377 INFO L226 Difference]: Without dead ends: 247 [2018-11-23 02:53:02,379 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9011, Invalid=15169, Unknown=0, NotChecked=0, Total=24180 [2018-11-23 02:53:02,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-11-23 02:53:02,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-11-23 02:53:02,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-11-23 02:53:02,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 327 transitions. [2018-11-23 02:53:02,433 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 327 transitions. Word has length 538 [2018-11-23 02:53:02,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:53:02,433 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 327 transitions. [2018-11-23 02:53:02,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-11-23 02:53:02,433 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 327 transitions. [2018-11-23 02:53:02,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2018-11-23 02:53:02,436 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:53:02,436 INFO L402 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:53:02,436 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:53:02,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:53:02,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1427684257, now seen corresponding path program 76 times [2018-11-23 02:53:02,437 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:53:02,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:53:02,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:02,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:53:02,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:53:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20254 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 11552 trivial. 0 not checked. [2018-11-23 02:53:04,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:53:04,090 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:53:04,097 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:53:04,199 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:53:04,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:53:04,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:53:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20254 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 11552 trivial. 0 not checked. [2018-11-23 02:53:04,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:53:04,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-11-23 02:53:04,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-11-23 02:53:04,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-11-23 02:53:04,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3085, Invalid=3395, Unknown=0, NotChecked=0, Total=6480 [2018-11-23 02:53:04,387 INFO L87 Difference]: Start difference. First operand 247 states and 327 transitions. Second operand 81 states. [2018-11-23 02:53:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:53:06,859 INFO L93 Difference]: Finished difference Result 254 states and 335 transitions. [2018-11-23 02:53:06,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-11-23 02:53:06,859 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 545 [2018-11-23 02:53:06,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:53:06,860 INFO L225 Difference]: With dead ends: 254 [2018-11-23 02:53:06,860 INFO L226 Difference]: Without dead ends: 250 [2018-11-23 02:53:06,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9245, Invalid=15561, Unknown=0, NotChecked=0, Total=24806 [2018-11-23 02:53:06,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-11-23 02:53:06,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2018-11-23 02:53:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-11-23 02:53:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 331 transitions. [2018-11-23 02:53:06,918 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 331 transitions. Word has length 545 [2018-11-23 02:53:06,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:53:06,918 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 331 transitions. [2018-11-23 02:53:06,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-11-23 02:53:06,918 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 331 transitions. [2018-11-23 02:53:06,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2018-11-23 02:53:06,920 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:53:06,920 INFO L402 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:53:06,921 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:53:06,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:53:06,921 INFO L82 PathProgramCache]: Analyzing trace with hash 963585256, now seen corresponding path program 77 times [2018-11-23 02:53:06,921 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:53:06,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:53:06,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:06,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:53:06,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:53:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20790 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 11858 trivial. 0 not checked. [2018-11-23 02:53:08,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:53:08,618 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:53:08,625 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:53:09,024 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-11-23 02:53:09,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:53:09,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:53:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20790 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 11858 trivial. 0 not checked. [2018-11-23 02:53:09,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:53:09,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-11-23 02:53:09,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-11-23 02:53:09,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-11-23 02:53:09,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3164, Invalid=3478, Unknown=0, NotChecked=0, Total=6642 [2018-11-23 02:53:09,235 INFO L87 Difference]: Start difference. First operand 250 states and 331 transitions. Second operand 82 states. [2018-11-23 02:53:11,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:53:11,750 INFO L93 Difference]: Finished difference Result 257 states and 339 transitions. [2018-11-23 02:53:11,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-11-23 02:53:11,751 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 552 [2018-11-23 02:53:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:53:11,752 INFO L225 Difference]: With dead ends: 257 [2018-11-23 02:53:11,752 INFO L226 Difference]: Without dead ends: 253 [2018-11-23 02:53:11,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 630 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9482, Invalid=15958, Unknown=0, NotChecked=0, Total=25440 [2018-11-23 02:53:11,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-11-23 02:53:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-11-23 02:53:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-11-23 02:53:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 335 transitions. [2018-11-23 02:53:11,812 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 335 transitions. Word has length 552 [2018-11-23 02:53:11,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:53:11,812 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 335 transitions. [2018-11-23 02:53:11,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-11-23 02:53:11,812 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 335 transitions. [2018-11-23 02:53:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2018-11-23 02:53:11,814 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:53:11,814 INFO L402 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:53:11,814 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:53:11,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:53:11,814 INFO L82 PathProgramCache]: Analyzing trace with hash -487877449, now seen corresponding path program 78 times [2018-11-23 02:53:11,814 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:53:11,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:53:11,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:11,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:53:11,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:53:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 21333 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 12168 trivial. 0 not checked. [2018-11-23 02:53:13,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:53:13,577 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:53:13,585 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:53:13,914 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-11-23 02:53:13,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:53:13,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:53:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21333 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 12168 trivial. 0 not checked. [2018-11-23 02:53:14,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:53:14,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-11-23 02:53:14,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-11-23 02:53:14,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-11-23 02:53:14,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3244, Invalid=3562, Unknown=0, NotChecked=0, Total=6806 [2018-11-23 02:53:14,115 INFO L87 Difference]: Start difference. First operand 253 states and 335 transitions. Second operand 83 states. [2018-11-23 02:53:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:53:16,773 INFO L93 Difference]: Finished difference Result 260 states and 343 transitions. [2018-11-23 02:53:16,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-11-23 02:53:16,773 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 559 [2018-11-23 02:53:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:53:16,774 INFO L225 Difference]: With dead ends: 260 [2018-11-23 02:53:16,774 INFO L226 Difference]: Without dead ends: 256 [2018-11-23 02:53:16,775 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9722, Invalid=16360, Unknown=0, NotChecked=0, Total=26082 [2018-11-23 02:53:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-11-23 02:53:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-11-23 02:53:16,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-11-23 02:53:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 339 transitions. [2018-11-23 02:53:16,835 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 339 transitions. Word has length 559 [2018-11-23 02:53:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:53:16,835 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 339 transitions. [2018-11-23 02:53:16,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-11-23 02:53:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 339 transitions. [2018-11-23 02:53:16,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2018-11-23 02:53:16,837 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:53:16,837 INFO L402 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:53:16,837 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:53:16,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:53:16,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1246094510, now seen corresponding path program 79 times [2018-11-23 02:53:16,838 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:53:16,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:53:16,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:16,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:53:16,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:53:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21883 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 12482 trivial. 0 not checked. [2018-11-23 02:53:18,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:53:18,605 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:53:18,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:53:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:53:18,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:53:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 21883 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 12482 trivial. 0 not checked. [2018-11-23 02:53:18,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:53:18,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-11-23 02:53:18,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-11-23 02:53:18,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-11-23 02:53:18,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=3647, Unknown=0, NotChecked=0, Total=6972 [2018-11-23 02:53:18,901 INFO L87 Difference]: Start difference. First operand 256 states and 339 transitions. Second operand 84 states. [2018-11-23 02:53:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:53:21,458 INFO L93 Difference]: Finished difference Result 263 states and 347 transitions. [2018-11-23 02:53:21,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-11-23 02:53:21,458 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 566 [2018-11-23 02:53:21,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:53:21,459 INFO L225 Difference]: With dead ends: 263 [2018-11-23 02:53:21,459 INFO L226 Difference]: Without dead ends: 259 [2018-11-23 02:53:21,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 646 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9965, Invalid=16767, Unknown=0, NotChecked=0, Total=26732 [2018-11-23 02:53:21,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-11-23 02:53:21,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-11-23 02:53:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-11-23 02:53:21,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 343 transitions. [2018-11-23 02:53:21,524 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 343 transitions. Word has length 566 [2018-11-23 02:53:21,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:53:21,524 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 343 transitions. [2018-11-23 02:53:21,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-11-23 02:53:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 343 transitions. [2018-11-23 02:53:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2018-11-23 02:53:21,526 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:53:21,526 INFO L402 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:53:21,526 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:53:21,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:53:21,527 INFO L82 PathProgramCache]: Analyzing trace with hash -994642227, now seen corresponding path program 80 times [2018-11-23 02:53:21,527 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:53:21,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:53:21,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:21,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:53:21,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:53:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 22440 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 12800 trivial. 0 not checked. [2018-11-23 02:53:23,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:53:23,325 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:53:23,331 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:53:23,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:53:23,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:53:23,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:53:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 22440 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 12800 trivial. 0 not checked. [2018-11-23 02:53:23,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:53:23,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-11-23 02:53:23,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-11-23 02:53:23,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-11-23 02:53:23,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3407, Invalid=3733, Unknown=0, NotChecked=0, Total=7140 [2018-11-23 02:53:23,606 INFO L87 Difference]: Start difference. First operand 259 states and 343 transitions. Second operand 85 states. [2018-11-23 02:53:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:53:26,145 INFO L93 Difference]: Finished difference Result 266 states and 351 transitions. [2018-11-23 02:53:26,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-11-23 02:53:26,145 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 573 [2018-11-23 02:53:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:53:26,146 INFO L225 Difference]: With dead ends: 266 [2018-11-23 02:53:26,146 INFO L226 Difference]: Without dead ends: 262 [2018-11-23 02:53:26,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10211, Invalid=17179, Unknown=0, NotChecked=0, Total=27390 [2018-11-23 02:53:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2018-11-23 02:53:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2018-11-23 02:53:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-11-23 02:53:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 347 transitions. [2018-11-23 02:53:26,210 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 347 transitions. Word has length 573 [2018-11-23 02:53:26,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:53:26,210 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 347 transitions. [2018-11-23 02:53:26,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-11-23 02:53:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 347 transitions. [2018-11-23 02:53:26,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2018-11-23 02:53:26,212 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:53:26,212 INFO L402 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:53:26,213 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:53:26,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:53:26,213 INFO L82 PathProgramCache]: Analyzing trace with hash -893372228, now seen corresponding path program 81 times [2018-11-23 02:53:26,213 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:53:26,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:53:26,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:26,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:53:26,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:53:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 23004 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 13122 trivial. 0 not checked. [2018-11-23 02:53:28,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:53:28,035 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:53:28,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:53:28,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-11-23 02:53:28,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:53:28,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:53:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 23004 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 13122 trivial. 0 not checked. [2018-11-23 02:53:28,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:53:28,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-11-23 02:53:28,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-11-23 02:53:28,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-11-23 02:53:28,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3490, Invalid=3820, Unknown=0, NotChecked=0, Total=7310 [2018-11-23 02:53:28,620 INFO L87 Difference]: Start difference. First operand 262 states and 347 transitions. Second operand 86 states. [2018-11-23 02:53:31,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:53:31,367 INFO L93 Difference]: Finished difference Result 269 states and 355 transitions. [2018-11-23 02:53:31,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-11-23 02:53:31,367 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 580 [2018-11-23 02:53:31,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:53:31,369 INFO L225 Difference]: With dead ends: 269 [2018-11-23 02:53:31,369 INFO L226 Difference]: Without dead ends: 265 [2018-11-23 02:53:31,371 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10460, Invalid=17596, Unknown=0, NotChecked=0, Total=28056 [2018-11-23 02:53:31,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-11-23 02:53:31,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-11-23 02:53:31,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-11-23 02:53:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 351 transitions. [2018-11-23 02:53:31,437 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 351 transitions. Word has length 580 [2018-11-23 02:53:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:53:31,438 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 351 transitions. [2018-11-23 02:53:31,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-11-23 02:53:31,438 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 351 transitions. [2018-11-23 02:53:31,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2018-11-23 02:53:31,441 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:53:31,441 INFO L402 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:53:31,441 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:53:31,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:53:31,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2092663267, now seen corresponding path program 82 times [2018-11-23 02:53:31,442 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:53:31,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:53:31,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:31,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:53:31,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:53:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 23575 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 13448 trivial. 0 not checked. [2018-11-23 02:53:33,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:53:33,358 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:53:33,366 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:53:33,475 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:53:33,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:53:33,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:53:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 23575 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 13448 trivial. 0 not checked. [2018-11-23 02:53:33,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:53:33,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-11-23 02:53:33,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-11-23 02:53:33,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-11-23 02:53:33,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3574, Invalid=3908, Unknown=0, NotChecked=0, Total=7482 [2018-11-23 02:53:33,672 INFO L87 Difference]: Start difference. First operand 265 states and 351 transitions. Second operand 87 states. [2018-11-23 02:53:36,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:53:36,579 INFO L93 Difference]: Finished difference Result 272 states and 359 transitions. [2018-11-23 02:53:36,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-11-23 02:53:36,580 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 587 [2018-11-23 02:53:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:53:36,581 INFO L225 Difference]: With dead ends: 272 [2018-11-23 02:53:36,581 INFO L226 Difference]: Without dead ends: 268 [2018-11-23 02:53:36,583 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=10712, Invalid=18018, Unknown=0, NotChecked=0, Total=28730 [2018-11-23 02:53:36,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-11-23 02:53:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2018-11-23 02:53:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-11-23 02:53:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 355 transitions. [2018-11-23 02:53:36,655 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 355 transitions. Word has length 587 [2018-11-23 02:53:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:53:36,656 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 355 transitions. [2018-11-23 02:53:36,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-11-23 02:53:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 355 transitions. [2018-11-23 02:53:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2018-11-23 02:53:36,659 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:53:36,659 INFO L402 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:53:36,659 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:53:36,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:53:36,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1154425562, now seen corresponding path program 83 times [2018-11-23 02:53:36,660 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:53:36,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:53:36,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:36,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:53:36,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:53:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24153 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 13778 trivial. 0 not checked. [2018-11-23 02:53:38,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:53:38,636 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:53:38,645 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:53:39,105 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-11-23 02:53:39,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:53:39,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:53:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 24153 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 13778 trivial. 0 not checked. [2018-11-23 02:53:39,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:53:39,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-11-23 02:53:39,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-11-23 02:53:39,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-11-23 02:53:39,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=3997, Unknown=0, NotChecked=0, Total=7656 [2018-11-23 02:53:39,317 INFO L87 Difference]: Start difference. First operand 268 states and 355 transitions. Second operand 88 states. [2018-11-23 02:53:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:53:42,409 INFO L93 Difference]: Finished difference Result 275 states and 363 transitions. [2018-11-23 02:53:42,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-11-23 02:53:42,409 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 594 [2018-11-23 02:53:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:53:42,410 INFO L225 Difference]: With dead ends: 275 [2018-11-23 02:53:42,410 INFO L226 Difference]: Without dead ends: 271 [2018-11-23 02:53:42,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 848 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10967, Invalid=18445, Unknown=0, NotChecked=0, Total=29412 [2018-11-23 02:53:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-11-23 02:53:42,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-11-23 02:53:42,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-11-23 02:53:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 359 transitions. [2018-11-23 02:53:42,481 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 359 transitions. Word has length 594 [2018-11-23 02:53:42,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:53:42,482 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 359 transitions. [2018-11-23 02:53:42,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-11-23 02:53:42,482 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 359 transitions. [2018-11-23 02:53:42,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2018-11-23 02:53:42,484 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:53:42,484 INFO L402 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:53:42,484 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:53:42,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:53:42,484 INFO L82 PathProgramCache]: Analyzing trace with hash 987354617, now seen corresponding path program 84 times [2018-11-23 02:53:42,484 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:53:42,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:53:42,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:42,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:53:42,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:53:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 24738 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 14112 trivial. 0 not checked. [2018-11-23 02:53:44,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:53:44,483 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:53:44,492 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:53:44,867 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-11-23 02:53:44,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:53:44,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:53:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 24738 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 14112 trivial. 0 not checked. [2018-11-23 02:53:45,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:53:45,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-11-23 02:53:45,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-11-23 02:53:45,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-11-23 02:53:45,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3745, Invalid=4087, Unknown=0, NotChecked=0, Total=7832 [2018-11-23 02:53:45,084 INFO L87 Difference]: Start difference. First operand 271 states and 359 transitions. Second operand 89 states. [2018-11-23 02:53:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:53:48,083 INFO L93 Difference]: Finished difference Result 278 states and 367 transitions. [2018-11-23 02:53:48,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-11-23 02:53:48,084 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 601 [2018-11-23 02:53:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:53:48,084 INFO L225 Difference]: With dead ends: 278 [2018-11-23 02:53:48,085 INFO L226 Difference]: Without dead ends: 274 [2018-11-23 02:53:48,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 858 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11225, Invalid=18877, Unknown=0, NotChecked=0, Total=30102 [2018-11-23 02:53:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-11-23 02:53:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2018-11-23 02:53:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-11-23 02:53:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 363 transitions. [2018-11-23 02:53:48,154 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 363 transitions. Word has length 601 [2018-11-23 02:53:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:53:48,155 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 363 transitions. [2018-11-23 02:53:48,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-11-23 02:53:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 363 transitions. [2018-11-23 02:53:48,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2018-11-23 02:53:48,157 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:53:48,157 INFO L402 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:53:48,157 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:53:48,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:53:48,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1293641872, now seen corresponding path program 85 times [2018-11-23 02:53:48,158 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:53:48,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:53:48,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:48,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:53:48,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:53:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 25330 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 14450 trivial. 0 not checked. [2018-11-23 02:53:50,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:53:50,180 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:53:50,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:53:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:53:50,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:53:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 25330 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 14450 trivial. 0 not checked. [2018-11-23 02:53:50,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:53:50,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-11-23 02:53:50,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-11-23 02:53:50,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-11-23 02:53:50,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3832, Invalid=4178, Unknown=0, NotChecked=0, Total=8010 [2018-11-23 02:53:50,496 INFO L87 Difference]: Start difference. First operand 274 states and 363 transitions. Second operand 90 states. [2018-11-23 02:53:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:53:53,483 INFO L93 Difference]: Finished difference Result 281 states and 371 transitions. [2018-11-23 02:53:53,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-11-23 02:53:53,483 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 608 [2018-11-23 02:53:53,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:53:53,484 INFO L225 Difference]: With dead ends: 281 [2018-11-23 02:53:53,484 INFO L226 Difference]: Without dead ends: 277 [2018-11-23 02:53:53,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11486, Invalid=19314, Unknown=0, NotChecked=0, Total=30800 [2018-11-23 02:53:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-11-23 02:53:53,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-11-23 02:53:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-11-23 02:53:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 367 transitions. [2018-11-23 02:53:53,556 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 367 transitions. Word has length 608 [2018-11-23 02:53:53,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:53:53,557 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 367 transitions. [2018-11-23 02:53:53,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-11-23 02:53:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 367 transitions. [2018-11-23 02:53:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-11-23 02:53:53,559 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:53:53,559 INFO L402 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:53:53,559 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:53:53,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:53:53,560 INFO L82 PathProgramCache]: Analyzing trace with hash 982684431, now seen corresponding path program 86 times [2018-11-23 02:53:53,560 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:53:53,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:53:53,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:53,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:53:53,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:53:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25929 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 14792 trivial. 0 not checked. [2018-11-23 02:53:55,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:53:55,639 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:53:55,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:53:55,749 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:53:55,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:53:55,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:53:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 25929 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 14792 trivial. 0 not checked. [2018-11-23 02:53:55,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:53:55,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-11-23 02:53:55,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-11-23 02:53:55,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-11-23 02:53:55,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3920, Invalid=4270, Unknown=0, NotChecked=0, Total=8190 [2018-11-23 02:53:55,960 INFO L87 Difference]: Start difference. First operand 277 states and 367 transitions. Second operand 91 states. [2018-11-23 02:53:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:53:59,154 INFO L93 Difference]: Finished difference Result 284 states and 375 transitions. [2018-11-23 02:53:59,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-11-23 02:53:59,155 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 615 [2018-11-23 02:53:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:53:59,156 INFO L225 Difference]: With dead ends: 284 [2018-11-23 02:53:59,156 INFO L226 Difference]: Without dead ends: 280 [2018-11-23 02:53:59,157 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11750, Invalid=19756, Unknown=0, NotChecked=0, Total=31506 [2018-11-23 02:53:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-11-23 02:53:59,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2018-11-23 02:53:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-11-23 02:53:59,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 371 transitions. [2018-11-23 02:53:59,228 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 371 transitions. Word has length 615 [2018-11-23 02:53:59,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:53:59,228 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 371 transitions. [2018-11-23 02:53:59,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-11-23 02:53:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 371 transitions. [2018-11-23 02:53:59,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2018-11-23 02:53:59,230 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:53:59,230 INFO L402 BasicCegarLoop]: trace histogram [88, 88, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:53:59,231 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:53:59,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:53:59,231 INFO L82 PathProgramCache]: Analyzing trace with hash -336643334, now seen corresponding path program 87 times [2018-11-23 02:53:59,231 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:53:59,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:53:59,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:59,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:53:59,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:53:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:54:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 26535 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 15138 trivial. 0 not checked. [2018-11-23 02:54:01,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:54:01,357 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:54:01,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:54:01,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-11-23 02:54:01,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:54:01,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:54:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 26535 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 15138 trivial. 0 not checked. [2018-11-23 02:54:02,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:54:02,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-11-23 02:54:02,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-11-23 02:54:02,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-11-23 02:54:02,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4009, Invalid=4363, Unknown=0, NotChecked=0, Total=8372 [2018-11-23 02:54:02,021 INFO L87 Difference]: Start difference. First operand 280 states and 371 transitions. Second operand 92 states. [2018-11-23 02:54:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:54:05,308 INFO L93 Difference]: Finished difference Result 287 states and 379 transitions. [2018-11-23 02:54:05,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-11-23 02:54:05,308 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 622 [2018-11-23 02:54:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:54:05,309 INFO L225 Difference]: With dead ends: 287 [2018-11-23 02:54:05,309 INFO L226 Difference]: Without dead ends: 283 [2018-11-23 02:54:05,311 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 710 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12017, Invalid=20203, Unknown=0, NotChecked=0, Total=32220 [2018-11-23 02:54:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-11-23 02:54:05,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-11-23 02:54:05,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-11-23 02:54:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 375 transitions. [2018-11-23 02:54:05,393 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 375 transitions. Word has length 622 [2018-11-23 02:54:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:54:05,393 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 375 transitions. [2018-11-23 02:54:05,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-11-23 02:54:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 375 transitions. [2018-11-23 02:54:05,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2018-11-23 02:54:05,395 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:54:05,395 INFO L402 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:54:05,395 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:54:05,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:54:05,396 INFO L82 PathProgramCache]: Analyzing trace with hash 554064165, now seen corresponding path program 88 times [2018-11-23 02:54:05,396 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:54:05,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:54:05,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:05,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:54:05,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:54:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 27148 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 15488 trivial. 0 not checked. [2018-11-23 02:54:07,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:54:07,557 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:54:07,566 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:54:07,678 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:54:07,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:54:07,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:54:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 27148 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 15488 trivial. 0 not checked. [2018-11-23 02:54:07,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:54:07,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-11-23 02:54:07,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-11-23 02:54:07,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-11-23 02:54:07,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4099, Invalid=4457, Unknown=0, NotChecked=0, Total=8556 [2018-11-23 02:54:07,894 INFO L87 Difference]: Start difference. First operand 283 states and 375 transitions. Second operand 93 states. [2018-11-23 02:54:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:54:11,140 INFO L93 Difference]: Finished difference Result 290 states and 383 transitions. [2018-11-23 02:54:11,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-11-23 02:54:11,141 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 629 [2018-11-23 02:54:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:54:11,142 INFO L225 Difference]: With dead ends: 290 [2018-11-23 02:54:11,142 INFO L226 Difference]: Without dead ends: 286 [2018-11-23 02:54:11,145 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 718 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12287, Invalid=20655, Unknown=0, NotChecked=0, Total=32942 [2018-11-23 02:54:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-11-23 02:54:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2018-11-23 02:54:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-11-23 02:54:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 379 transitions. [2018-11-23 02:54:11,228 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 379 transitions. Word has length 629 [2018-11-23 02:54:11,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:54:11,229 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 379 transitions. [2018-11-23 02:54:11,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-11-23 02:54:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 379 transitions. [2018-11-23 02:54:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2018-11-23 02:54:11,232 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:54:11,232 INFO L402 BasicCegarLoop]: trace histogram [90, 90, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:54:11,233 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:54:11,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:54:11,233 INFO L82 PathProgramCache]: Analyzing trace with hash -897862556, now seen corresponding path program 89 times [2018-11-23 02:54:11,233 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:54:11,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:54:11,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:11,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:54:11,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:54:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 27768 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 15842 trivial. 0 not checked. [2018-11-23 02:54:13,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:54:13,480 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:54:13,503 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:54:14,032 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-11-23 02:54:14,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:54:14,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:54:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 27768 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 15842 trivial. 0 not checked. [2018-11-23 02:54:14,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:54:14,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-11-23 02:54:14,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-11-23 02:54:14,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-11-23 02:54:14,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4190, Invalid=4552, Unknown=0, NotChecked=0, Total=8742 [2018-11-23 02:54:14,258 INFO L87 Difference]: Start difference. First operand 286 states and 379 transitions. Second operand 94 states. [2018-11-23 02:54:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:54:17,532 INFO L93 Difference]: Finished difference Result 293 states and 387 transitions. [2018-11-23 02:54:17,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-11-23 02:54:17,532 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 636 [2018-11-23 02:54:17,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:54:17,533 INFO L225 Difference]: With dead ends: 293 [2018-11-23 02:54:17,533 INFO L226 Difference]: Without dead ends: 289 [2018-11-23 02:54:17,535 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=12560, Invalid=21112, Unknown=0, NotChecked=0, Total=33672 [2018-11-23 02:54:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-11-23 02:54:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2018-11-23 02:54:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-11-23 02:54:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 383 transitions. [2018-11-23 02:54:17,619 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 383 transitions. Word has length 636 [2018-11-23 02:54:17,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:54:17,619 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 383 transitions. [2018-11-23 02:54:17,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-11-23 02:54:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 383 transitions. [2018-11-23 02:54:17,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2018-11-23 02:54:17,621 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:54:17,621 INFO L402 BasicCegarLoop]: trace histogram [91, 91, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:54:17,622 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:54:17,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:54:17,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1526057019, now seen corresponding path program 90 times [2018-11-23 02:54:17,622 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:54:17,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:54:17,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:17,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:54:17,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:54:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 28395 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 16200 trivial. 0 not checked. [2018-11-23 02:54:19,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:54:19,882 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:54:19,892 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:54:20,311 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-11-23 02:54:20,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:54:20,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:54:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 28395 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 16200 trivial. 0 not checked. [2018-11-23 02:54:20,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:54:20,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-11-23 02:54:20,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-11-23 02:54:20,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-11-23 02:54:20,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4282, Invalid=4648, Unknown=0, NotChecked=0, Total=8930 [2018-11-23 02:54:20,553 INFO L87 Difference]: Start difference. First operand 289 states and 383 transitions. Second operand 95 states. [2018-11-23 02:54:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:54:23,951 INFO L93 Difference]: Finished difference Result 296 states and 391 transitions. [2018-11-23 02:54:23,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-11-23 02:54:23,952 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 643 [2018-11-23 02:54:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:54:23,953 INFO L225 Difference]: With dead ends: 296 [2018-11-23 02:54:23,953 INFO L226 Difference]: Without dead ends: 292 [2018-11-23 02:54:23,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 734 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=12836, Invalid=21574, Unknown=0, NotChecked=0, Total=34410 [2018-11-23 02:54:23,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-11-23 02:54:24,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2018-11-23 02:54:24,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-11-23 02:54:24,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 387 transitions. [2018-11-23 02:54:24,041 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 387 transitions. Word has length 643 [2018-11-23 02:54:24,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:54:24,042 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 387 transitions. [2018-11-23 02:54:24,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-11-23 02:54:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 387 transitions. [2018-11-23 02:54:24,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2018-11-23 02:54:24,045 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:54:24,046 INFO L402 BasicCegarLoop]: trace histogram [92, 92, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:54:24,046 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:54:24,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:54:24,046 INFO L82 PathProgramCache]: Analyzing trace with hash 82851022, now seen corresponding path program 91 times [2018-11-23 02:54:24,046 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:54:24,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:54:24,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:24,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:54:24,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:54:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 29029 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 16562 trivial. 0 not checked. [2018-11-23 02:54:26,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:54:26,398 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:54:26,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:54:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:54:26,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:54:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 29029 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 16562 trivial. 0 not checked. [2018-11-23 02:54:26,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:54:26,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-11-23 02:54:26,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-11-23 02:54:26,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-11-23 02:54:26,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4375, Invalid=4745, Unknown=0, NotChecked=0, Total=9120 [2018-11-23 02:54:26,746 INFO L87 Difference]: Start difference. First operand 292 states and 387 transitions. Second operand 96 states. [2018-11-23 02:54:30,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:54:30,282 INFO L93 Difference]: Finished difference Result 299 states and 395 transitions. [2018-11-23 02:54:30,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-11-23 02:54:30,282 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 650 [2018-11-23 02:54:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:54:30,283 INFO L225 Difference]: With dead ends: 299 [2018-11-23 02:54:30,283 INFO L226 Difference]: Without dead ends: 295 [2018-11-23 02:54:30,285 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=13115, Invalid=22041, Unknown=0, NotChecked=0, Total=35156 [2018-11-23 02:54:30,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-11-23 02:54:30,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-11-23 02:54:30,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-11-23 02:54:30,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 391 transitions. [2018-11-23 02:54:30,372 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 391 transitions. Word has length 650 [2018-11-23 02:54:30,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:54:30,373 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 391 transitions. [2018-11-23 02:54:30,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-11-23 02:54:30,373 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 391 transitions. [2018-11-23 02:54:30,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2018-11-23 02:54:30,375 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:54:30,375 INFO L402 BasicCegarLoop]: trace histogram [93, 93, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:54:30,375 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:54:30,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:54:30,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2059501649, now seen corresponding path program 92 times [2018-11-23 02:54:30,376 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:54:30,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:54:30,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:30,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:54:30,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:54:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 29670 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 16928 trivial. 0 not checked. [2018-11-23 02:54:32,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:54:32,782 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:54:32,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:54:32,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:54:32,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:54:32,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:54:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 29670 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 16928 trivial. 0 not checked. [2018-11-23 02:54:33,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:54:33,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-11-23 02:54:33,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-11-23 02:54:33,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-11-23 02:54:33,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4469, Invalid=4843, Unknown=0, NotChecked=0, Total=9312 [2018-11-23 02:54:33,146 INFO L87 Difference]: Start difference. First operand 295 states and 391 transitions. Second operand 97 states. [2018-11-23 02:54:36,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:54:36,808 INFO L93 Difference]: Finished difference Result 302 states and 399 transitions. [2018-11-23 02:54:36,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-11-23 02:54:36,808 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 657 [2018-11-23 02:54:36,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:54:36,809 INFO L225 Difference]: With dead ends: 302 [2018-11-23 02:54:36,809 INFO L226 Difference]: Without dead ends: 298 [2018-11-23 02:54:36,810 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 750 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13397, Invalid=22513, Unknown=0, NotChecked=0, Total=35910 [2018-11-23 02:54:36,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-11-23 02:54:36,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2018-11-23 02:54:36,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-11-23 02:54:36,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 395 transitions. [2018-11-23 02:54:36,899 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 395 transitions. Word has length 657 [2018-11-23 02:54:36,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:54:36,899 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 395 transitions. [2018-11-23 02:54:36,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-11-23 02:54:36,899 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 395 transitions. [2018-11-23 02:54:36,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2018-11-23 02:54:36,901 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:54:36,902 INFO L402 BasicCegarLoop]: trace histogram [94, 94, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:54:36,902 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:54:36,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:54:36,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1025762248, now seen corresponding path program 93 times [2018-11-23 02:54:36,902 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:54:36,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:54:36,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:36,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:54:36,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:54:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30318 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 17298 trivial. 0 not checked. [2018-11-23 02:54:39,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:54:39,358 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:54:39,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:54:39,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-11-23 02:54:39,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:54:39,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:54:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30318 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 17298 trivial. 0 not checked. [2018-11-23 02:54:40,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:54:40,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-11-23 02:54:40,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-11-23 02:54:40,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-11-23 02:54:40,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=4942, Unknown=0, NotChecked=0, Total=9506 [2018-11-23 02:54:40,115 INFO L87 Difference]: Start difference. First operand 298 states and 395 transitions. Second operand 98 states. [2018-11-23 02:54:43,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:54:43,882 INFO L93 Difference]: Finished difference Result 305 states and 403 transitions. [2018-11-23 02:54:43,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-11-23 02:54:43,882 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 664 [2018-11-23 02:54:43,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:54:43,883 INFO L225 Difference]: With dead ends: 305 [2018-11-23 02:54:43,883 INFO L226 Difference]: Without dead ends: 301 [2018-11-23 02:54:43,884 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 758 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=13682, Invalid=22990, Unknown=0, NotChecked=0, Total=36672 [2018-11-23 02:54:43,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-11-23 02:54:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-11-23 02:54:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-11-23 02:54:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 399 transitions. [2018-11-23 02:54:43,974 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 399 transitions. Word has length 664 [2018-11-23 02:54:43,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:54:43,974 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 399 transitions. [2018-11-23 02:54:43,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-11-23 02:54:43,974 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 399 transitions. [2018-11-23 02:54:43,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2018-11-23 02:54:43,977 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:54:43,977 INFO L402 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:54:43,977 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:54:43,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:54:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1771429529, now seen corresponding path program 94 times [2018-11-23 02:54:43,977 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:54:43,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:54:43,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:43,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:54:43,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:54:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 30973 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 17672 trivial. 0 not checked. [2018-11-23 02:54:46,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:54:46,451 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:54:46,458 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:54:46,578 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:54:46,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:54:46,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:54:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 30973 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 17672 trivial. 0 not checked. [2018-11-23 02:54:46,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:54:46,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-11-23 02:54:46,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-11-23 02:54:46,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-11-23 02:54:46,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4660, Invalid=5042, Unknown=0, NotChecked=0, Total=9702 [2018-11-23 02:54:46,841 INFO L87 Difference]: Start difference. First operand 301 states and 399 transitions. Second operand 99 states. [2018-11-23 02:54:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:54:50,821 INFO L93 Difference]: Finished difference Result 308 states and 407 transitions. [2018-11-23 02:54:50,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-11-23 02:54:50,821 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 671 [2018-11-23 02:54:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:54:50,823 INFO L225 Difference]: With dead ends: 308 [2018-11-23 02:54:50,823 INFO L226 Difference]: Without dead ends: 304 [2018-11-23 02:54:50,826 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=13970, Invalid=23472, Unknown=0, NotChecked=0, Total=37442 [2018-11-23 02:54:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2018-11-23 02:54:50,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2018-11-23 02:54:50,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-11-23 02:54:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 403 transitions. [2018-11-23 02:54:50,927 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 403 transitions. Word has length 671 [2018-11-23 02:54:50,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:54:50,928 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 403 transitions. [2018-11-23 02:54:50,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-11-23 02:54:50,928 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 403 transitions. [2018-11-23 02:54:50,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2018-11-23 02:54:50,932 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:54:50,932 INFO L402 BasicCegarLoop]: trace histogram [96, 96, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:54:50,932 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:54:50,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:54:50,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1496238754, now seen corresponding path program 95 times [2018-11-23 02:54:50,933 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:54:50,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:54:50,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:50,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:54:50,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:54:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 31635 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 18050 trivial. 0 not checked. [2018-11-23 02:54:53,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:54:53,516 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:54:53,526 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:54:54,079 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-11-23 02:54:54,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:54:54,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:54:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 31635 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 18050 trivial. 0 not checked. [2018-11-23 02:54:54,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:54:54,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-11-23 02:54:54,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-11-23 02:54:54,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-11-23 02:54:54,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4757, Invalid=5143, Unknown=0, NotChecked=0, Total=9900 [2018-11-23 02:54:54,336 INFO L87 Difference]: Start difference. First operand 304 states and 403 transitions. Second operand 100 states. [2018-11-23 02:54:58,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:54:58,307 INFO L93 Difference]: Finished difference Result 311 states and 411 transitions. [2018-11-23 02:54:58,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-11-23 02:54:58,308 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 678 [2018-11-23 02:54:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:54:58,310 INFO L225 Difference]: With dead ends: 311 [2018-11-23 02:54:58,310 INFO L226 Difference]: Without dead ends: 307 [2018-11-23 02:54:58,313 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 968 GetRequests, 774 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=14261, Invalid=23959, Unknown=0, NotChecked=0, Total=38220 [2018-11-23 02:54:58,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-11-23 02:54:58,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-11-23 02:54:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-11-23 02:54:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 407 transitions. [2018-11-23 02:54:58,420 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 407 transitions. Word has length 678 [2018-11-23 02:54:58,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:54:58,421 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 407 transitions. [2018-11-23 02:54:58,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-11-23 02:54:58,421 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 407 transitions. [2018-11-23 02:54:58,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2018-11-23 02:54:58,425 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:54:58,425 INFO L402 BasicCegarLoop]: trace histogram [97, 97, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:54:58,425 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:54:58,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:54:58,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1517270147, now seen corresponding path program 96 times [2018-11-23 02:54:58,425 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:54:58,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:54:58,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:58,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:54:58,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:54:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:55:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 32304 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 18432 trivial. 0 not checked. [2018-11-23 02:55:01,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:55:01,030 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:55:01,037 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:55:01,520 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-11-23 02:55:01,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:55:01,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:55:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 32304 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 18432 trivial. 0 not checked. [2018-11-23 02:55:01,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:55:01,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-11-23 02:55:01,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-11-23 02:55:01,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-11-23 02:55:01,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2018-11-23 02:55:01,780 INFO L87 Difference]: Start difference. First operand 307 states and 407 transitions. Second operand 101 states. [2018-11-23 02:55:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:55:05,789 INFO L93 Difference]: Finished difference Result 314 states and 415 transitions. [2018-11-23 02:55:05,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-11-23 02:55:05,790 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 685 [2018-11-23 02:55:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:55:05,791 INFO L225 Difference]: With dead ends: 314 [2018-11-23 02:55:05,791 INFO L226 Difference]: Without dead ends: 310 [2018-11-23 02:55:05,792 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 782 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=14555, Invalid=24451, Unknown=0, NotChecked=0, Total=39006 [2018-11-23 02:55:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2018-11-23 02:55:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2018-11-23 02:55:05,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2018-11-23 02:55:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 411 transitions. [2018-11-23 02:55:05,898 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 411 transitions. Word has length 685 [2018-11-23 02:55:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:55:05,898 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 411 transitions. [2018-11-23 02:55:05,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-11-23 02:55:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 411 transitions. [2018-11-23 02:55:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2018-11-23 02:55:05,901 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:55:05,901 INFO L402 BasicCegarLoop]: trace histogram [98, 98, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:55:05,901 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:55:05,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:55:05,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1815584780, now seen corresponding path program 97 times [2018-11-23 02:55:05,901 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:55:05,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:55:05,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:55:05,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:55:05,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:55:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:55:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 32980 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 18818 trivial. 0 not checked. [2018-11-23 02:55:08,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:55:08,506 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:55:08,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:55:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:55:08,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:55:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32980 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 18818 trivial. 0 not checked. [2018-11-23 02:55:08,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:55:08,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-11-23 02:55:08,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-11-23 02:55:08,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-11-23 02:55:08,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4954, Invalid=5348, Unknown=0, NotChecked=0, Total=10302 [2018-11-23 02:55:08,907 INFO L87 Difference]: Start difference. First operand 310 states and 411 transitions. Second operand 102 states. [2018-11-23 02:55:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:55:13,022 INFO L93 Difference]: Finished difference Result 317 states and 419 transitions. [2018-11-23 02:55:13,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-11-23 02:55:13,022 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 692 [2018-11-23 02:55:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:55:13,024 INFO L225 Difference]: With dead ends: 317 [2018-11-23 02:55:13,024 INFO L226 Difference]: Without dead ends: 313 [2018-11-23 02:55:13,025 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 988 GetRequests, 790 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=14852, Invalid=24948, Unknown=0, NotChecked=0, Total=39800 [2018-11-23 02:55:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-11-23 02:55:13,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2018-11-23 02:55:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-11-23 02:55:13,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 415 transitions. [2018-11-23 02:55:13,136 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 415 transitions. Word has length 692 [2018-11-23 02:55:13,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:55:13,136 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 415 transitions. [2018-11-23 02:55:13,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-11-23 02:55:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 415 transitions. [2018-11-23 02:55:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-11-23 02:55:13,141 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:55:13,141 INFO L402 BasicCegarLoop]: trace histogram [99, 99, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:55:13,141 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:55:13,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:55:13,141 INFO L82 PathProgramCache]: Analyzing trace with hash -546005357, now seen corresponding path program 98 times [2018-11-23 02:55:13,141 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:55:13,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:55:13,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:55:13,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:55:13,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:55:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:55:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 33663 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 19208 trivial. 0 not checked. [2018-11-23 02:55:15,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:55:15,894 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:55:15,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:55:16,024 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:55:16,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:55:16,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:55:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 33663 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 19208 trivial. 0 not checked. [2018-11-23 02:55:16,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:55:16,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-11-23 02:55:16,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-11-23 02:55:16,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-11-23 02:55:16,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5054, Invalid=5452, Unknown=0, NotChecked=0, Total=10506 [2018-11-23 02:55:16,296 INFO L87 Difference]: Start difference. First operand 313 states and 415 transitions. Second operand 103 states. [2018-11-23 02:55:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:55:20,517 INFO L93 Difference]: Finished difference Result 320 states and 423 transitions. [2018-11-23 02:55:20,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-11-23 02:55:20,518 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 699 [2018-11-23 02:55:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:55:20,519 INFO L225 Difference]: With dead ends: 320 [2018-11-23 02:55:20,519 INFO L226 Difference]: Without dead ends: 316 [2018-11-23 02:55:20,522 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 998 GetRequests, 798 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=15152, Invalid=25450, Unknown=0, NotChecked=0, Total=40602 [2018-11-23 02:55:20,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2018-11-23 02:55:20,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2018-11-23 02:55:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-11-23 02:55:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 419 transitions. [2018-11-23 02:55:20,637 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 419 transitions. Word has length 699 [2018-11-23 02:55:20,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:55:20,637 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 419 transitions. [2018-11-23 02:55:20,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-11-23 02:55:20,637 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 419 transitions. [2018-11-23 02:55:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2018-11-23 02:55:20,641 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:55:20,642 INFO L402 BasicCegarLoop]: trace histogram [100, 100, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:55:20,642 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:55:20,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:55:20,642 INFO L82 PathProgramCache]: Analyzing trace with hash 296090742, now seen corresponding path program 99 times [2018-11-23 02:55:20,642 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:55:20,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:55:20,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:55:20,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:55:20,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:55:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:55:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 34353 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 19602 trivial. 0 not checked. [2018-11-23 02:55:23,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:55:23,404 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:55:23,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:55:23,974 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-11-23 02:55:23,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:55:23,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:55:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 34353 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 19602 trivial. 0 not checked. [2018-11-23 02:55:24,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:55:24,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-11-23 02:55:24,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-11-23 02:55:24,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-11-23 02:55:24,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5155, Invalid=5557, Unknown=0, NotChecked=0, Total=10712 [2018-11-23 02:55:24,245 INFO L87 Difference]: Start difference. First operand 316 states and 419 transitions. Second operand 104 states. [2018-11-23 02:55:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:55:28,499 INFO L93 Difference]: Finished difference Result 323 states and 427 transitions. [2018-11-23 02:55:28,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-11-23 02:55:28,500 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 706 [2018-11-23 02:55:28,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:55:28,501 INFO L225 Difference]: With dead ends: 323 [2018-11-23 02:55:28,501 INFO L226 Difference]: Without dead ends: 319 [2018-11-23 02:55:28,503 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1008 GetRequests, 806 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=15455, Invalid=25957, Unknown=0, NotChecked=0, Total=41412 [2018-11-23 02:55:28,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-11-23 02:55:28,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-11-23 02:55:28,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-11-23 02:55:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 423 transitions. [2018-11-23 02:55:28,613 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 423 transitions. Word has length 706 [2018-11-23 02:55:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:55:28,614 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 423 transitions. [2018-11-23 02:55:28,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-11-23 02:55:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 423 transitions. [2018-11-23 02:55:28,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2018-11-23 02:55:28,618 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:55:28,618 INFO L402 BasicCegarLoop]: trace histogram [101, 101, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:55:28,618 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:55:28,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:55:28,619 INFO L82 PathProgramCache]: Analyzing trace with hash 418888361, now seen corresponding path program 100 times [2018-11-23 02:55:28,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:55:28,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:55:28,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:55:28,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:55:28,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:55:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:55:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 35050 backedges. 15050 proven. 0 refuted. 0 times theorem prover too weak. 20000 trivial. 0 not checked. [2018-11-23 02:55:37,540 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:55:37,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [206] imperfect sequences [] total 206 [2018-11-23 02:55:37,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-11-23 02:55:37,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-11-23 02:55:37,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10409, Invalid=31821, Unknown=0, NotChecked=0, Total=42230 [2018-11-23 02:55:37,542 INFO L87 Difference]: Start difference. First operand 319 states and 423 transitions. Second operand 206 states. [2018-11-23 02:55:43,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:55:43,071 INFO L93 Difference]: Finished difference Result 625 states and 830 transitions. [2018-11-23 02:55:43,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2018-11-23 02:55:43,071 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 713 [2018-11-23 02:55:43,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:55:43,074 INFO L225 Difference]: With dead ends: 625 [2018-11-23 02:55:43,074 INFO L226 Difference]: Without dead ends: 621 [2018-11-23 02:55:43,085 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50198 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=31213, Invalid=134029, Unknown=0, NotChecked=0, Total=165242 [2018-11-23 02:55:43,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2018-11-23 02:55:43,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 322. [2018-11-23 02:55:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-23 02:55:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 427 transitions. [2018-11-23 02:55:43,567 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 427 transitions. Word has length 713 [2018-11-23 02:55:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:55:43,568 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 427 transitions. [2018-11-23 02:55:43,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-11-23 02:55:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 427 transitions. [2018-11-23 02:55:43,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 716 [2018-11-23 02:55:43,572 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:55:43,572 INFO L402 BasicCegarLoop]: trace histogram [101, 101, 101, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:55:43,573 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:55:43,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:55:43,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1512877282, now seen corresponding path program 1 times [2018-11-23 02:55:43,573 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:55:43,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:55:43,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:55:43,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:55:43,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:55:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:55:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 35150 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 35050 trivial. 0 not checked. [2018-11-23 02:55:43,752 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:55:43,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-23 02:55:43,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-23 02:55:43,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-23 02:55:43,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-23 02:55:43,752 INFO L87 Difference]: Start difference. First operand 322 states and 427 transitions. Second operand 4 states. [2018-11-23 02:55:43,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:55:43,770 INFO L93 Difference]: Finished difference Result 631 states and 838 transitions. [2018-11-23 02:55:43,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-23 02:55:43,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 715 [2018-11-23 02:55:43,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:55:43,772 INFO L225 Difference]: With dead ends: 631 [2018-11-23 02:55:43,772 INFO L226 Difference]: Without dead ends: 324 [2018-11-23 02:55:43,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-23 02:55:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2018-11-23 02:55:43,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 322. [2018-11-23 02:55:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-23 02:55:43,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 426 transitions. [2018-11-23 02:55:43,895 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 426 transitions. Word has length 715 [2018-11-23 02:55:43,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:55:43,895 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 426 transitions. [2018-11-23 02:55:43,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-23 02:55:43,895 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 426 transitions. [2018-11-23 02:55:43,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 722 [2018-11-23 02:55:43,899 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:55:43,899 INFO L402 BasicCegarLoop]: trace histogram [102, 102, 101, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:55:43,899 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:55:43,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:55:43,900 INFO L82 PathProgramCache]: Analyzing trace with hash 956489533, now seen corresponding path program 1 times [2018-11-23 02:55:43,900 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 02:55:43,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 02:55:43,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:55:43,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:55:43,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:55:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:55:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 35554 backedges. 701 proven. 1 refuted. 0 times theorem prover too weak. 34852 trivial. 0 not checked. [2018-11-23 02:55:44,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:55:44,139 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:55:44,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:55:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:55:44,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:55:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 35554 backedges. 701 proven. 1 refuted. 0 times theorem prover too weak. 34852 trivial. 0 not checked. [2018-11-23 02:55:44,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 02:55:44,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2018-11-23 02:55:44,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 02:55:44,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 02:55:44,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-23 02:55:44,465 INFO L87 Difference]: Start difference. First operand 322 states and 426 transitions. Second operand 7 states. [2018-11-23 02:55:44,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:55:44,498 INFO L93 Difference]: Finished difference Result 327 states and 433 transitions. [2018-11-23 02:55:44,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 02:55:44,499 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 721 [2018-11-23 02:55:44,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:55:44,499 INFO L225 Difference]: With dead ends: 327 [2018-11-23 02:55:44,499 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 02:55:44,500 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 722 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-23 02:55:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 02:55:44,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 02:55:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 02:55:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 02:55:44,501 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 721 [2018-11-23 02:55:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:55:44,501 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 02:55:44,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 02:55:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 02:55:44,501 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 02:55:44,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 02:55:44,558 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 02:55:44,558 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 02:55:44,558 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 02:55:44,558 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 02:55:44,558 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 02:55:44,559 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 02:55:44,559 INFO L448 ceAbstractionStarter]: For program point L33(line 33) no Hoare annotation was computed. [2018-11-23 02:55:44,559 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 33) no Hoare annotation was computed. [2018-11-23 02:55:44,559 INFO L448 ceAbstractionStarter]: For program point L30(lines 30 34) no Hoare annotation was computed. [2018-11-23 02:55:44,559 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 26 35) the Hoare annotation is: true [2018-11-23 02:55:44,559 INFO L451 ceAbstractionStarter]: At program point L29(line 29) the Hoare annotation is: true [2018-11-23 02:55:44,559 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 26 35) no Hoare annotation was computed. [2018-11-23 02:55:44,559 INFO L448 ceAbstractionStarter]: For program point L29-1(line 29) no Hoare annotation was computed. [2018-11-23 02:55:44,559 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 26 35) no Hoare annotation was computed. [2018-11-23 02:55:44,559 INFO L448 ceAbstractionStarter]: For program point additionFINAL(lines 13 23) no Hoare annotation was computed. [2018-11-23 02:55:44,559 INFO L444 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (<= |addition_#in~m| addition_~m) (<= |addition_#in~n| addition_~n) (<= (+ addition_~n 1) 0)) [2018-11-23 02:55:44,560 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 22) no Hoare annotation was computed. [2018-11-23 02:55:44,560 INFO L448 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-11-23 02:55:44,560 INFO L444 ceAbstractionStarter]: At program point L18(line 18) the Hoare annotation is: (and (<= |addition_#in~m| addition_~m) (<= |addition_#in~n| addition_~n) (<= 1 addition_~n)) [2018-11-23 02:55:44,560 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 19) no Hoare annotation was computed. [2018-11-23 02:55:44,560 INFO L448 ceAbstractionStarter]: For program point L18-1(line 18) no Hoare annotation was computed. [2018-11-23 02:55:44,560 INFO L451 ceAbstractionStarter]: At program point additionENTRY(lines 13 23) the Hoare annotation is: true [2018-11-23 02:55:44,560 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 16) no Hoare annotation was computed. [2018-11-23 02:55:44,560 INFO L448 ceAbstractionStarter]: For program point additionEXIT(lines 13 23) no Hoare annotation was computed. [2018-11-23 02:55:44,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:55:44 BoogieIcfgContainer [2018-11-23 02:55:44,563 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 02:55:44,563 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 02:55:44,563 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 02:55:44,563 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 02:55:44,564 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:50:54" (3/4) ... [2018-11-23 02:55:44,568 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 02:55:44,574 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 02:55:44,575 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 02:55:44,575 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure addition [2018-11-23 02:55:44,579 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 02:55:44,579 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-23 02:55:44,579 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 02:55:44,613 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_05db068b-6d91-445e-b5f7-90eecdb11750/bin-2019/uautomizer/witness.graphml [2018-11-23 02:55:44,613 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 02:55:44,614 INFO L168 Benchmark]: Toolchain (without parser) took 290392.37 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 800.6 MB). Free memory was 960.3 MB in the beginning and 1.3 GB in the end (delta: -329.1 MB). Peak memory consumption was 471.5 MB. Max. memory is 11.5 GB. [2018-11-23 02:55:44,615 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 02:55:44,615 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.88 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 02:55:44,615 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.52 ms. Allocated memory is still 1.0 GB. Free memory was 949.6 MB in the beginning and 946.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 02:55:44,615 INFO L168 Benchmark]: Boogie Preprocessor took 13.57 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 02:55:44,615 INFO L168 Benchmark]: RCFGBuilder took 205.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -187.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-23 02:55:44,616 INFO L168 Benchmark]: TraceAbstraction took 289932.07 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 651.7 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -173.4 MB). Peak memory consumption was 478.3 MB. Max. memory is 11.5 GB. [2018-11-23 02:55:44,616 INFO L168 Benchmark]: Witness Printer took 49.90 ms. Allocated memory is still 1.8 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. [2018-11-23 02:55:44,617 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 171.88 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 15.52 ms. Allocated memory is still 1.0 GB. Free memory was 949.6 MB in the beginning and 946.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.57 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 205.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -187.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 289932.07 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 651.7 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -173.4 MB). Peak memory consumption was 478.3 MB. Max. memory is 11.5 GB. * Witness Printer took 49.90 ms. Allocated memory is still 1.8 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 33]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 289.8s OverallTime, 103 OverallIterations, 102 TraceHistogramMax, 150.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1661 SDtfs, 11307 SDslu, 35346 SDs, 0 SdLazy, 30234 SolverSat, 16842 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52528 GetRequests, 41814 SyntacticMatches, 1 SemanticMatches, 10713 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221800 ImplicationChecksByTransitivity, 198.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=322occurred in iteration=101, 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: 3.9s AutomataMinimizationTime, 103 MinimizatonAttempts, 301 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 16 NumberOfFragments, 28 HoareAnnotationTreeSize, 14 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 1.4s SsaConstructionTime, 15.9s SatisfiabilityAnalysisTime, 107.3s InterpolantComputationTime, 74757 NumberOfCodeBlocks, 74757 NumberOfCodeBlocksAsserted, 2719 NumberOfCheckSat, 74554 ConstructedInterpolants, 0 QuantifiedInterpolants, 94568022 SizeOfPredicates, 5150 NumberOfNonLiveVariables, 100270 ConjunctsInSsa, 10300 ConjunctsInUnsatCore, 203 InterpolantComputations, 3 PerfectInterpolantSequences, 1454706/2444708 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...