./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007_true-unreach-call_true-termination.c.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007_true-unreach-call_true-termination.c.i -s /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 1a9963030a13e3c679db84f21688cc66372a5ac3 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 15:48:36,956 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 15:48:36,957 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 15:48:36,963 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 15:48:36,963 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 15:48:36,963 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 15:48:36,964 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 15:48:36,965 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 15:48:36,966 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 15:48:36,966 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 15:48:36,967 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 15:48:36,967 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 15:48:36,968 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 15:48:36,968 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 15:48:36,969 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 15:48:36,969 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 15:48:36,970 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 15:48:36,971 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 15:48:36,972 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 15:48:36,973 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 15:48:36,973 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 15:48:36,974 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 15:48:36,975 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 15:48:36,976 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 15:48:36,976 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 15:48:36,976 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 15:48:36,977 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 15:48:36,978 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 15:48:36,978 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 15:48:36,979 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 15:48:36,979 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 15:48:36,979 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 15:48:36,979 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 15:48:36,980 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 15:48:36,980 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 15:48:36,981 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 15:48:36,981 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-08 15:48:36,988 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 15:48:36,989 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 15:48:36,989 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 15:48:36,989 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 15:48:36,990 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-08 15:48:36,990 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-08 15:48:36,990 INFO L133 SettingsManager]: * Use SBE=true [2018-12-08 15:48:36,990 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 15:48:36,990 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 15:48:36,991 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 15:48:36,991 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 15:48:36,991 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 15:48:36,991 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 15:48:36,991 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 15:48:36,991 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 15:48:36,991 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 15:48:36,992 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 15:48:36,992 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-08 15:48:36,992 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 15:48:36,992 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 15:48:36,992 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 15:48:36,992 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 15:48:36,992 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 15:48:36,993 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 15:48:36,993 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 15:48:36,993 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 15:48:36,993 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 15:48:36,993 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-08 15:48:36,993 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 15:48:36,993 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 15:48:36,993 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_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 -> 1a9963030a13e3c679db84f21688cc66372a5ac3 [2018-12-08 15:48:37,010 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 15:48:37,017 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 15:48:37,019 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 15:48:37,020 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 15:48:37,020 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 15:48:37,021 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/../../sv-benchmarks/c/loop-lit/gj2007_true-unreach-call_true-termination.c.i [2018-12-08 15:48:37,056 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/data/a703f9d5a/edc921481687450cad6c7fac39665037/FLAG8e5993b39 [2018-12-08 15:48:37,485 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 15:48:37,486 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/sv-benchmarks/c/loop-lit/gj2007_true-unreach-call_true-termination.c.i [2018-12-08 15:48:37,489 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/data/a703f9d5a/edc921481687450cad6c7fac39665037/FLAG8e5993b39 [2018-12-08 15:48:37,497 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/data/a703f9d5a/edc921481687450cad6c7fac39665037 [2018-12-08 15:48:37,499 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 15:48:37,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 15:48:37,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 15:48:37,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 15:48:37,502 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 15:48:37,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:48:37" (1/1) ... [2018-12-08 15:48:37,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37de4022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:48:37, skipping insertion in model container [2018-12-08 15:48:37,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:48:37" (1/1) ... [2018-12-08 15:48:37,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 15:48:37,516 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 15:48:37,597 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 15:48:37,600 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 15:48:37,608 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 15:48:37,616 INFO L195 MainTranslator]: Completed translation [2018-12-08 15:48:37,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:48:37 WrapperNode [2018-12-08 15:48:37,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 15:48:37,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 15:48:37,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 15:48:37,617 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 15:48:37,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:48:37" (1/1) ... [2018-12-08 15:48:37,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:48:37" (1/1) ... [2018-12-08 15:48:37,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 15:48:37,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 15:48:37,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 15:48:37,628 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 15:48:37,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:48:37" (1/1) ... [2018-12-08 15:48:37,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:48:37" (1/1) ... [2018-12-08 15:48:37,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:48:37" (1/1) ... [2018-12-08 15:48:37,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:48:37" (1/1) ... [2018-12-08 15:48:37,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:48:37" (1/1) ... [2018-12-08 15:48:37,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:48:37" (1/1) ... [2018-12-08 15:48:37,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:48:37" (1/1) ... [2018-12-08 15:48:37,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 15:48:37,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 15:48:37,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 15:48:37,640 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 15:48:37,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:48:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 15:48:37,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 15:48:37,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 15:48:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 15:48:37,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 15:48:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 15:48:37,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 15:48:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-08 15:48:37,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-08 15:48:37,782 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 15:48:37,782 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-08 15:48:37,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:48:37 BoogieIcfgContainer [2018-12-08 15:48:37,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 15:48:37,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 15:48:37,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 15:48:37,785 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 15:48:37,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 03:48:37" (1/3) ... [2018-12-08 15:48:37,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a88a43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 03:48:37, skipping insertion in model container [2018-12-08 15:48:37,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:48:37" (2/3) ... [2018-12-08 15:48:37,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a88a43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 03:48:37, skipping insertion in model container [2018-12-08 15:48:37,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:48:37" (3/3) ... [2018-12-08 15:48:37,787 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007_true-unreach-call_true-termination.c.i [2018-12-08 15:48:37,792 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 15:48:37,796 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 15:48:37,806 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 15:48:37,824 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-08 15:48:37,824 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 15:48:37,825 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 15:48:37,825 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 15:48:37,825 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 15:48:37,825 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 15:48:37,825 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 15:48:37,825 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 15:48:37,825 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 15:48:37,836 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-08 15:48:37,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-08 15:48:37,839 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:37,840 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:37,841 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:37,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:37,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2018-12-08 15:48:37,845 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:37,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:37,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:37,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:37,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:48:37,908 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:48:37,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 15:48:37,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-08 15:48:37,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-08 15:48:37,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 15:48:37,920 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-12-08 15:48:37,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:37,931 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-12-08 15:48:37,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-08 15:48:37,932 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-08 15:48:37,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:37,937 INFO L225 Difference]: With dead ends: 31 [2018-12-08 15:48:37,937 INFO L226 Difference]: Without dead ends: 12 [2018-12-08 15:48:37,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 15:48:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-12-08 15:48:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-12-08 15:48:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-08 15:48:37,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-12-08 15:48:37,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-12-08 15:48:37,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:37,961 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-12-08 15:48:37,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-08 15:48:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-12-08 15:48:37,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-08 15:48:37,961 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:37,961 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:37,961 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:37,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:37,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2018-12-08 15:48:37,962 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:37,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:37,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:37,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:37,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:48:37,982 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:48:37,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-08 15:48:37,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 15:48:37,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 15:48:37,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 15:48:37,983 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2018-12-08 15:48:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:38,002 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2018-12-08 15:48:38,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 15:48:38,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-08 15:48:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:38,003 INFO L225 Difference]: With dead ends: 21 [2018-12-08 15:48:38,003 INFO L226 Difference]: Without dead ends: 14 [2018-12-08 15:48:38,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 15:48:38,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-08 15:48:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-08 15:48:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-08 15:48:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-08 15:48:38,006 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-12-08 15:48:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:38,006 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-08 15:48:38,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 15:48:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-08 15:48:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-08 15:48:38,007 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:38,007 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:38,007 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:38,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:38,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1337256884, now seen corresponding path program 1 times [2018-12-08 15:48:38,007 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:38,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:38,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:38,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:48:38,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:38,026 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:48:38,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:38,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:48:38,093 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-08 15:48:38,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-12-08 15:48:38,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 15:48:38,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 15:48:38,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 15:48:38,095 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-12-08 15:48:38,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:38,123 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-12-08 15:48:38,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 15:48:38,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-12-08 15:48:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:38,124 INFO L225 Difference]: With dead ends: 25 [2018-12-08 15:48:38,124 INFO L226 Difference]: Without dead ends: 18 [2018-12-08 15:48:38,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 15:48:38,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-08 15:48:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-12-08 15:48:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-08 15:48:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-12-08 15:48:38,128 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2018-12-08 15:48:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:38,128 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-12-08 15:48:38,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 15:48:38,128 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-12-08 15:48:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-08 15:48:38,129 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:38,129 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:38,129 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:38,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:38,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1891741908, now seen corresponding path program 1 times [2018-12-08 15:48:38,129 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:38,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:38,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:38,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:48:38,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:38,158 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:48:38,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:38,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:48:38,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:38,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-12-08 15:48:38,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 15:48:38,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 15:48:38,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 15:48:38,189 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2018-12-08 15:48:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:38,207 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-12-08 15:48:38,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 15:48:38,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-12-08 15:48:38,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:38,208 INFO L225 Difference]: With dead ends: 27 [2018-12-08 15:48:38,208 INFO L226 Difference]: Without dead ends: 19 [2018-12-08 15:48:38,209 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 15:48:38,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-08 15:48:38,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-12-08 15:48:38,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-08 15:48:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-12-08 15:48:38,212 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-12-08 15:48:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:38,212 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-12-08 15:48:38,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 15:48:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-12-08 15:48:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-08 15:48:38,213 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:38,213 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:38,213 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:38,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:38,213 INFO L82 PathProgramCache]: Analyzing trace with hash 719576937, now seen corresponding path program 2 times [2018-12-08 15:48:38,213 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:38,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:38,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:38,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:48:38,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:38,242 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:48:38,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 15:48:38,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 15:48:38,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:38,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:48:38,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:38,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-08 15:48:38,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 15:48:38,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 15:48:38,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-08 15:48:38,275 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2018-12-08 15:48:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:38,292 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-12-08 15:48:38,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 15:48:38,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-12-08 15:48:38,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:38,293 INFO L225 Difference]: With dead ends: 29 [2018-12-08 15:48:38,293 INFO L226 Difference]: Without dead ends: 21 [2018-12-08 15:48:38,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-08 15:48:38,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-08 15:48:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-08 15:48:38,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-08 15:48:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-08 15:48:38,295 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-12-08 15:48:38,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:38,295 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-08 15:48:38,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 15:48:38,296 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-08 15:48:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-08 15:48:38,296 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:38,296 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:38,296 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:38,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:38,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1936086118, now seen corresponding path program 3 times [2018-12-08 15:48:38,296 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:38,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:38,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:38,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:48:38,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:38,327 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:48:38,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 15:48:38,342 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-08 15:48:38,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:38,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-08 15:48:38,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:38,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2018-12-08 15:48:38,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 15:48:38,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 15:48:38,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-08 15:48:38,385 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2018-12-08 15:48:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:38,404 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2018-12-08 15:48:38,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 15:48:38,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-12-08 15:48:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:38,406 INFO L225 Difference]: With dead ends: 34 [2018-12-08 15:48:38,406 INFO L226 Difference]: Without dead ends: 26 [2018-12-08 15:48:38,406 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-08 15:48:38,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-08 15:48:38,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-12-08 15:48:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-08 15:48:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-12-08 15:48:38,409 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-12-08 15:48:38,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:38,409 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-12-08 15:48:38,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 15:48:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-12-08 15:48:38,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-08 15:48:38,410 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:38,410 INFO L402 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:38,410 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:38,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:38,410 INFO L82 PathProgramCache]: Analyzing trace with hash 485983838, now seen corresponding path program 4 times [2018-12-08 15:48:38,410 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:38,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:38,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:38,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 15:48:38,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:38,447 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:48:38,455 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 15:48:38,461 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 15:48:38,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:38,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 15:48:38,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:38,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-08 15:48:38,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 15:48:38,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 15:48:38,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-08 15:48:38,493 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2018-12-08 15:48:38,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:38,519 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2018-12-08 15:48:38,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 15:48:38,519 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2018-12-08 15:48:38,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:38,520 INFO L225 Difference]: With dead ends: 37 [2018-12-08 15:48:38,520 INFO L226 Difference]: Without dead ends: 27 [2018-12-08 15:48:38,520 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-08 15:48:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-08 15:48:38,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-08 15:48:38,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-08 15:48:38,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-12-08 15:48:38,523 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2018-12-08 15:48:38,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:38,523 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-12-08 15:48:38,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 15:48:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-12-08 15:48:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-08 15:48:38,524 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:38,524 INFO L402 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:38,524 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:38,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:38,524 INFO L82 PathProgramCache]: Analyzing trace with hash 375097755, now seen corresponding path program 5 times [2018-12-08 15:48:38,524 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:38,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:38,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:38,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 15:48:38,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:38,566 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:48:38,572 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 15:48:38,581 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-12-08 15:48:38,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:38,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 15:48:38,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:38,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-08 15:48:38,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 15:48:38,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 15:48:38,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-08 15:48:38,602 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 9 states. [2018-12-08 15:48:38,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:38,626 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2018-12-08 15:48:38,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 15:48:38,626 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-12-08 15:48:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:38,627 INFO L225 Difference]: With dead ends: 39 [2018-12-08 15:48:38,627 INFO L226 Difference]: Without dead ends: 29 [2018-12-08 15:48:38,627 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-08 15:48:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-08 15:48:38,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-08 15:48:38,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-08 15:48:38,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-12-08 15:48:38,630 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-12-08 15:48:38,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:38,630 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-12-08 15:48:38,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 15:48:38,630 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-12-08 15:48:38,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-08 15:48:38,630 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:38,631 INFO L402 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:38,631 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:38,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:38,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1187754392, now seen corresponding path program 6 times [2018-12-08 15:48:38,631 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:38,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:38,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:38,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 15:48:38,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:38,681 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:48:38,687 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 15:48:38,700 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-12-08 15:48:38,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:38,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:48:38,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:38,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2018-12-08 15:48:38,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-08 15:48:38,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-08 15:48:38,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-12-08 15:48:38,819 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 19 states. [2018-12-08 15:48:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:38,872 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2018-12-08 15:48:38,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-08 15:48:38,873 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2018-12-08 15:48:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:38,873 INFO L225 Difference]: With dead ends: 56 [2018-12-08 15:48:38,874 INFO L226 Difference]: Without dead ends: 46 [2018-12-08 15:48:38,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-12-08 15:48:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-08 15:48:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2018-12-08 15:48:38,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-08 15:48:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2018-12-08 15:48:38,878 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 28 [2018-12-08 15:48:38,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:38,879 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2018-12-08 15:48:38,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-08 15:48:38,879 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2018-12-08 15:48:38,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-08 15:48:38,880 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:38,880 INFO L402 BasicCegarLoop]: trace histogram [17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:38,880 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:38,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:38,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1069809998, now seen corresponding path program 7 times [2018-12-08 15:48:38,881 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:38,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:38,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:38,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-12-08 15:48:38,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:38,960 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:48:38,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:38,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 72 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-12-08 15:48:39,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:39,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-12-08 15:48:39,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 15:48:39,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 15:48:39,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-08 15:48:39,003 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 11 states. [2018-12-08 15:48:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:39,024 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2018-12-08 15:48:39,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 15:48:39,024 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2018-12-08 15:48:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:39,025 INFO L225 Difference]: With dead ends: 71 [2018-12-08 15:48:39,025 INFO L226 Difference]: Without dead ends: 47 [2018-12-08 15:48:39,025 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-08 15:48:39,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-08 15:48:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-12-08 15:48:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-08 15:48:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2018-12-08 15:48:39,029 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 44 [2018-12-08 15:48:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:39,029 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2018-12-08 15:48:39,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 15:48:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2018-12-08 15:48:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-12-08 15:48:39,030 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:39,030 INFO L402 BasicCegarLoop]: trace histogram [18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:39,030 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:39,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:39,030 INFO L82 PathProgramCache]: Analyzing trace with hash -353173137, now seen corresponding path program 8 times [2018-12-08 15:48:39,030 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:39,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:39,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:39,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:39,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 170 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-12-08 15:48:39,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:39,089 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:48:39,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 15:48:39,105 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 15:48:39,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:39,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 170 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-12-08 15:48:39,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:39,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-12-08 15:48:39,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 15:48:39,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 15:48:39,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-08 15:48:39,128 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 12 states. [2018-12-08 15:48:39,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:39,154 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2018-12-08 15:48:39,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 15:48:39,154 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2018-12-08 15:48:39,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:39,154 INFO L225 Difference]: With dead ends: 73 [2018-12-08 15:48:39,154 INFO L226 Difference]: Without dead ends: 49 [2018-12-08 15:48:39,155 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-08 15:48:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-12-08 15:48:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-12-08 15:48:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-08 15:48:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2018-12-08 15:48:39,158 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 46 [2018-12-08 15:48:39,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:39,158 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2018-12-08 15:48:39,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 15:48:39,158 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2018-12-08 15:48:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-08 15:48:39,158 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:39,159 INFO L402 BasicCegarLoop]: trace histogram [19, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:39,159 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:39,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:39,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1140082924, now seen corresponding path program 9 times [2018-12-08 15:48:39,159 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:39,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:39,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:39,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:39,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 187 proven. 110 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-12-08 15:48:39,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:39,250 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:48:39,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 15:48:39,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-12-08 15:48:39,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:39,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 37 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:48:39,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:39,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2018-12-08 15:48:39,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-08 15:48:39,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-08 15:48:39,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-08 15:48:39,524 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 32 states. [2018-12-08 15:48:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:39,603 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2018-12-08 15:48:39,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-08 15:48:39,604 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 48 [2018-12-08 15:48:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:39,604 INFO L225 Difference]: With dead ends: 96 [2018-12-08 15:48:39,604 INFO L226 Difference]: Without dead ends: 72 [2018-12-08 15:48:39,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-08 15:48:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-12-08 15:48:39,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-12-08 15:48:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-12-08 15:48:39,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2018-12-08 15:48:39,610 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 48 [2018-12-08 15:48:39,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:39,610 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2018-12-08 15:48:39,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-08 15:48:39,610 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2018-12-08 15:48:39,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-12-08 15:48:39,611 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:39,611 INFO L402 BasicCegarLoop]: trace histogram [30, 19, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:39,611 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:39,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:39,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2089968457, now seen corresponding path program 10 times [2018-12-08 15:48:39,612 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:39,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:39,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:39,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:39,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 444 proven. 132 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-12-08 15:48:39,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:39,695 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:39,701 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 15:48:39,715 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 15:48:39,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:39,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 444 proven. 132 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-12-08 15:48:39,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:39,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-12-08 15:48:39,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 15:48:39,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 15:48:39,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-08 15:48:39,749 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand 14 states. [2018-12-08 15:48:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:39,777 INFO L93 Difference]: Finished difference Result 117 states and 156 transitions. [2018-12-08 15:48:39,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 15:48:39,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2018-12-08 15:48:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:39,778 INFO L225 Difference]: With dead ends: 117 [2018-12-08 15:48:39,778 INFO L226 Difference]: Without dead ends: 73 [2018-12-08 15:48:39,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-12-08 15:48:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-08 15:48:39,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-12-08 15:48:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-12-08 15:48:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2018-12-08 15:48:39,782 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 70 [2018-12-08 15:48:39,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:39,782 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2018-12-08 15:48:39,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 15:48:39,782 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2018-12-08 15:48:39,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-12-08 15:48:39,783 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:39,783 INFO L402 BasicCegarLoop]: trace histogram [31, 19, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:39,783 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:39,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:39,784 INFO L82 PathProgramCache]: Analyzing trace with hash 442465588, now seen corresponding path program 11 times [2018-12-08 15:48:39,784 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:39,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:39,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:39,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:39,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 481 proven. 156 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-12-08 15:48:39,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:39,874 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:39,880 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 15:48:39,904 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-12-08 15:48:39,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:39,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 481 proven. 156 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-12-08 15:48:39,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:39,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-12-08 15:48:39,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 15:48:39,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 15:48:39,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-12-08 15:48:39,932 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 15 states. [2018-12-08 15:48:39,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:39,963 INFO L93 Difference]: Finished difference Result 119 states and 158 transitions. [2018-12-08 15:48:39,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-08 15:48:39,964 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 72 [2018-12-08 15:48:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:39,964 INFO L225 Difference]: With dead ends: 119 [2018-12-08 15:48:39,964 INFO L226 Difference]: Without dead ends: 75 [2018-12-08 15:48:39,965 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-12-08 15:48:39,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-12-08 15:48:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-12-08 15:48:39,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-12-08 15:48:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2018-12-08 15:48:39,968 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 72 [2018-12-08 15:48:39,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:39,968 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2018-12-08 15:48:39,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 15:48:39,968 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2018-12-08 15:48:39,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-12-08 15:48:39,968 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:39,968 INFO L402 BasicCegarLoop]: trace histogram [32, 19, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:39,969 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:39,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:39,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1134873999, now seen corresponding path program 12 times [2018-12-08 15:48:39,969 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:39,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:39,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:39,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:39,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 518 proven. 182 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2018-12-08 15:48:40,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:40,054 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:40,059 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 15:48:40,086 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-12-08 15:48:40,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:40,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 507 proven. 361 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-12-08 15:48:40,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:40,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 36 [2018-12-08 15:48:40,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-08 15:48:40,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-08 15:48:40,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 15:48:40,359 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand 36 states. [2018-12-08 15:48:40,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:40,467 INFO L93 Difference]: Finished difference Result 124 states and 166 transitions. [2018-12-08 15:48:40,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-08 15:48:40,467 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 74 [2018-12-08 15:48:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:40,468 INFO L225 Difference]: With dead ends: 124 [2018-12-08 15:48:40,468 INFO L226 Difference]: Without dead ends: 80 [2018-12-08 15:48:40,469 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 15:48:40,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-08 15:48:40,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2018-12-08 15:48:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-08 15:48:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2018-12-08 15:48:40,472 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 74 [2018-12-08 15:48:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:40,472 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2018-12-08 15:48:40,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-08 15:48:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2018-12-08 15:48:40,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-12-08 15:48:40,473 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:40,473 INFO L402 BasicCegarLoop]: trace histogram [34, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:40,473 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:40,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:40,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2056007145, now seen corresponding path program 13 times [2018-12-08 15:48:40,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:40,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:40,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:40,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:40,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 585 proven. 210 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-12-08 15:48:40,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:40,583 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:40,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:40,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 585 proven. 210 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-12-08 15:48:40,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:40,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-12-08 15:48:40,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-08 15:48:40,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-08 15:48:40,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-12-08 15:48:40,626 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 17 states. [2018-12-08 15:48:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:40,661 INFO L93 Difference]: Finished difference Result 127 states and 168 transitions. [2018-12-08 15:48:40,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-08 15:48:40,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2018-12-08 15:48:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:40,661 INFO L225 Difference]: With dead ends: 127 [2018-12-08 15:48:40,661 INFO L226 Difference]: Without dead ends: 81 [2018-12-08 15:48:40,662 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-12-08 15:48:40,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-12-08 15:48:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-12-08 15:48:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-12-08 15:48:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2018-12-08 15:48:40,665 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 78 [2018-12-08 15:48:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:40,665 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2018-12-08 15:48:40,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-08 15:48:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2018-12-08 15:48:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-12-08 15:48:40,665 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:40,665 INFO L402 BasicCegarLoop]: trace histogram [35, 20, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:40,665 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:40,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:40,666 INFO L82 PathProgramCache]: Analyzing trace with hash -687324826, now seen corresponding path program 14 times [2018-12-08 15:48:40,666 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:40,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:40,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:40,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:40,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 624 proven. 240 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-12-08 15:48:40,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:40,765 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:40,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 15:48:40,782 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 15:48:40,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:40,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 624 proven. 240 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-12-08 15:48:40,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:40,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-12-08 15:48:40,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-08 15:48:40,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-08 15:48:40,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-08 15:48:40,806 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 18 states. [2018-12-08 15:48:40,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:40,846 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2018-12-08 15:48:40,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-08 15:48:40,847 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2018-12-08 15:48:40,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:40,847 INFO L225 Difference]: With dead ends: 129 [2018-12-08 15:48:40,847 INFO L226 Difference]: Without dead ends: 83 [2018-12-08 15:48:40,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-12-08 15:48:40,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-08 15:48:40,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-12-08 15:48:40,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-12-08 15:48:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2018-12-08 15:48:40,850 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 80 [2018-12-08 15:48:40,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:40,850 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2018-12-08 15:48:40,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-08 15:48:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2018-12-08 15:48:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-12-08 15:48:40,851 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:40,851 INFO L402 BasicCegarLoop]: trace histogram [36, 20, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:40,851 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:40,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:40,851 INFO L82 PathProgramCache]: Analyzing trace with hash 80570787, now seen corresponding path program 15 times [2018-12-08 15:48:40,851 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:40,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:40,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:40,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:40,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 663 proven. 272 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-12-08 15:48:40,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:40,950 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:40,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 15:48:40,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-12-08 15:48:40,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:40,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 663 proven. 272 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-12-08 15:48:41,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:41,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-12-08 15:48:41,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-08 15:48:41,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-08 15:48:41,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-12-08 15:48:41,010 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand 19 states. [2018-12-08 15:48:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:41,043 INFO L93 Difference]: Finished difference Result 131 states and 172 transitions. [2018-12-08 15:48:41,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-08 15:48:41,043 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2018-12-08 15:48:41,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:41,044 INFO L225 Difference]: With dead ends: 131 [2018-12-08 15:48:41,044 INFO L226 Difference]: Without dead ends: 85 [2018-12-08 15:48:41,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-12-08 15:48:41,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-08 15:48:41,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-12-08 15:48:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-12-08 15:48:41,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2018-12-08 15:48:41,047 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 82 [2018-12-08 15:48:41,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:41,047 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2018-12-08 15:48:41,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-08 15:48:41,047 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2018-12-08 15:48:41,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-12-08 15:48:41,048 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:41,048 INFO L402 BasicCegarLoop]: trace histogram [37, 20, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:41,048 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:41,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:41,048 INFO L82 PathProgramCache]: Analyzing trace with hash -706120032, now seen corresponding path program 16 times [2018-12-08 15:48:41,048 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:41,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:41,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:41,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:41,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 702 proven. 306 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-12-08 15:48:41,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:41,184 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:41,191 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 15:48:41,205 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 15:48:41,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:41,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 702 proven. 306 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-12-08 15:48:41,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:41,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-12-08 15:48:41,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-08 15:48:41,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-08 15:48:41,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-12-08 15:48:41,229 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand 20 states. [2018-12-08 15:48:41,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:41,265 INFO L93 Difference]: Finished difference Result 133 states and 174 transitions. [2018-12-08 15:48:41,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-08 15:48:41,265 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 84 [2018-12-08 15:48:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:41,265 INFO L225 Difference]: With dead ends: 133 [2018-12-08 15:48:41,265 INFO L226 Difference]: Without dead ends: 87 [2018-12-08 15:48:41,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-12-08 15:48:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-12-08 15:48:41,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-12-08 15:48:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-12-08 15:48:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2018-12-08 15:48:41,268 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 84 [2018-12-08 15:48:41,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:41,268 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2018-12-08 15:48:41,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-08 15:48:41,268 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2018-12-08 15:48:41,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-12-08 15:48:41,269 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:41,269 INFO L402 BasicCegarLoop]: trace histogram [38, 20, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:41,269 INFO L423 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:41,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:41,269 INFO L82 PathProgramCache]: Analyzing trace with hash -801752995, now seen corresponding path program 17 times [2018-12-08 15:48:41,269 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:41,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:41,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:41,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:41,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 342 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-12-08 15:48:41,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:41,384 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:41,389 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 15:48:41,417 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2018-12-08 15:48:41,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:41,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 342 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-12-08 15:48:41,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:41,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-12-08 15:48:41,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-08 15:48:41,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-08 15:48:41,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-12-08 15:48:41,441 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 21 states. [2018-12-08 15:48:41,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:41,489 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2018-12-08 15:48:41,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-08 15:48:41,489 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 86 [2018-12-08 15:48:41,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:41,489 INFO L225 Difference]: With dead ends: 135 [2018-12-08 15:48:41,489 INFO L226 Difference]: Without dead ends: 89 [2018-12-08 15:48:41,490 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-12-08 15:48:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-08 15:48:41,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-12-08 15:48:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-08 15:48:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2018-12-08 15:48:41,492 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 86 [2018-12-08 15:48:41,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:41,492 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2018-12-08 15:48:41,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-08 15:48:41,493 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2018-12-08 15:48:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-12-08 15:48:41,493 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:41,493 INFO L402 BasicCegarLoop]: trace histogram [39, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:41,493 INFO L423 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:41,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:41,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1784250074, now seen corresponding path program 18 times [2018-12-08 15:48:41,494 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:41,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:41,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:41,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:41,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 380 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-12-08 15:48:41,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:41,639 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:41,645 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 15:48:41,674 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-12-08 15:48:41,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:41,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 779 proven. 400 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-12-08 15:48:42,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:42,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2018-12-08 15:48:42,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-12-08 15:48:42,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-12-08 15:48:42,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-12-08 15:48:42,028 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand 43 states. [2018-12-08 15:48:42,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:42,144 INFO L93 Difference]: Finished difference Result 140 states and 184 transitions. [2018-12-08 15:48:42,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-08 15:48:42,144 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 88 [2018-12-08 15:48:42,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:42,144 INFO L225 Difference]: With dead ends: 140 [2018-12-08 15:48:42,145 INFO L226 Difference]: Without dead ends: 94 [2018-12-08 15:48:42,145 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-12-08 15:48:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-12-08 15:48:42,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2018-12-08 15:48:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-08 15:48:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2018-12-08 15:48:42,149 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 88 [2018-12-08 15:48:42,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:42,149 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2018-12-08 15:48:42,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-12-08 15:48:42,149 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2018-12-08 15:48:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-12-08 15:48:42,149 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:42,150 INFO L402 BasicCegarLoop]: trace histogram [41, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:42,150 INFO L423 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:42,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:42,150 INFO L82 PathProgramCache]: Analyzing trace with hash 765850962, now seen corresponding path program 19 times [2018-12-08 15:48:42,150 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:42,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:42,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:42,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:42,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 420 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-12-08 15:48:42,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:42,288 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:42,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:42,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 420 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-12-08 15:48:42,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:42,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-12-08 15:48:42,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-08 15:48:42,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-08 15:48:42,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-12-08 15:48:42,330 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 23 states. [2018-12-08 15:48:42,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:42,375 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2018-12-08 15:48:42,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-08 15:48:42,375 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2018-12-08 15:48:42,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:42,375 INFO L225 Difference]: With dead ends: 143 [2018-12-08 15:48:42,375 INFO L226 Difference]: Without dead ends: 95 [2018-12-08 15:48:42,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-12-08 15:48:42,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-12-08 15:48:42,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-12-08 15:48:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-12-08 15:48:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2018-12-08 15:48:42,378 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 92 [2018-12-08 15:48:42,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:42,379 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2018-12-08 15:48:42,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-08 15:48:42,379 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2018-12-08 15:48:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-12-08 15:48:42,379 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:42,379 INFO L402 BasicCegarLoop]: trace histogram [42, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:42,379 INFO L423 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:42,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:42,379 INFO L82 PathProgramCache]: Analyzing trace with hash 707242511, now seen corresponding path program 20 times [2018-12-08 15:48:42,379 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:42,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:42,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:42,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:42,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 902 proven. 462 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-12-08 15:48:42,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:42,546 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:42,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 15:48:42,568 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 15:48:42,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:42,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 902 proven. 462 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-12-08 15:48:42,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:42,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-12-08 15:48:42,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-08 15:48:42,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-08 15:48:42,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-12-08 15:48:42,602 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand 24 states. [2018-12-08 15:48:42,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:42,630 INFO L93 Difference]: Finished difference Result 145 states and 188 transitions. [2018-12-08 15:48:42,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-08 15:48:42,630 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 94 [2018-12-08 15:48:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:42,631 INFO L225 Difference]: With dead ends: 145 [2018-12-08 15:48:42,631 INFO L226 Difference]: Without dead ends: 97 [2018-12-08 15:48:42,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-12-08 15:48:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-12-08 15:48:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-12-08 15:48:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-08 15:48:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2018-12-08 15:48:42,633 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 94 [2018-12-08 15:48:42,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:42,633 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2018-12-08 15:48:42,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-08 15:48:42,633 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2018-12-08 15:48:42,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-12-08 15:48:42,634 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:42,634 INFO L402 BasicCegarLoop]: trace histogram [43, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:42,634 INFO L423 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:42,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:42,634 INFO L82 PathProgramCache]: Analyzing trace with hash 219095948, now seen corresponding path program 21 times [2018-12-08 15:48:42,634 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:42,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:42,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:42,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:42,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 943 proven. 506 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-12-08 15:48:42,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:42,795 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:42,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 15:48:42,834 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-12-08 15:48:42,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:42,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 85 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:48:43,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:43,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 68 [2018-12-08 15:48:43,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-12-08 15:48:43,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-12-08 15:48:43,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-12-08 15:48:43,734 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand 68 states. [2018-12-08 15:48:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:43,959 INFO L93 Difference]: Finished difference Result 192 states and 280 transitions. [2018-12-08 15:48:43,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-12-08 15:48:43,959 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 96 [2018-12-08 15:48:43,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:43,960 INFO L225 Difference]: With dead ends: 192 [2018-12-08 15:48:43,960 INFO L226 Difference]: Without dead ends: 144 [2018-12-08 15:48:43,960 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-12-08 15:48:43,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-12-08 15:48:43,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2018-12-08 15:48:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-12-08 15:48:43,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 186 transitions. [2018-12-08 15:48:43,963 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 186 transitions. Word has length 96 [2018-12-08 15:48:43,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:43,963 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 186 transitions. [2018-12-08 15:48:43,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-12-08 15:48:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 186 transitions. [2018-12-08 15:48:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-12-08 15:48:43,963 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:43,964 INFO L402 BasicCegarLoop]: trace histogram [66, 43, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:43,964 INFO L423 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:43,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:43,964 INFO L82 PathProgramCache]: Analyzing trace with hash -906433893, now seen corresponding path program 22 times [2018-12-08 15:48:43,964 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:43,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:43,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:43,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:43,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2040 proven. 552 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2018-12-08 15:48:44,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:44,152 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:44,158 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 15:48:44,179 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 15:48:44,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:44,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2040 proven. 552 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2018-12-08 15:48:44,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:44,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-12-08 15:48:44,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-08 15:48:44,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-08 15:48:44,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-12-08 15:48:44,206 INFO L87 Difference]: Start difference. First operand 143 states and 186 transitions. Second operand 26 states. [2018-12-08 15:48:44,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:44,267 INFO L93 Difference]: Finished difference Result 237 states and 324 transitions. [2018-12-08 15:48:44,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-08 15:48:44,267 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 142 [2018-12-08 15:48:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:44,268 INFO L225 Difference]: With dead ends: 237 [2018-12-08 15:48:44,268 INFO L226 Difference]: Without dead ends: 145 [2018-12-08 15:48:44,268 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-12-08 15:48:44,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-12-08 15:48:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-12-08 15:48:44,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-12-08 15:48:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2018-12-08 15:48:44,272 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 142 [2018-12-08 15:48:44,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:44,273 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2018-12-08 15:48:44,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-08 15:48:44,273 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2018-12-08 15:48:44,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-12-08 15:48:44,273 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:44,274 INFO L402 BasicCegarLoop]: trace histogram [67, 43, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:44,274 INFO L423 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:44,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:44,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1926927896, now seen corresponding path program 23 times [2018-12-08 15:48:44,274 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:44,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:44,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:44,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:44,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2125 proven. 600 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2018-12-08 15:48:44,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:44,485 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:44,491 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 15:48:44,550 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2018-12-08 15:48:44,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:44,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2125 proven. 600 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2018-12-08 15:48:44,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:44,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-12-08 15:48:44,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-08 15:48:44,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-08 15:48:44,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-12-08 15:48:44,583 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand 27 states. [2018-12-08 15:48:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:44,635 INFO L93 Difference]: Finished difference Result 239 states and 326 transitions. [2018-12-08 15:48:44,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-08 15:48:44,635 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 144 [2018-12-08 15:48:44,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:44,636 INFO L225 Difference]: With dead ends: 239 [2018-12-08 15:48:44,636 INFO L226 Difference]: Without dead ends: 147 [2018-12-08 15:48:44,636 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-12-08 15:48:44,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-12-08 15:48:44,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-12-08 15:48:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-12-08 15:48:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2018-12-08 15:48:44,639 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 144 [2018-12-08 15:48:44,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:44,639 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2018-12-08 15:48:44,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-08 15:48:44,639 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2018-12-08 15:48:44,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-12-08 15:48:44,640 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:44,640 INFO L402 BasicCegarLoop]: trace histogram [68, 43, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:44,640 INFO L423 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:44,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:44,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1778341461, now seen corresponding path program 24 times [2018-12-08 15:48:44,640 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:44,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:44,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:44,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:44,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2210 proven. 650 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2018-12-08 15:48:44,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:44,837 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:44,842 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 15:48:44,903 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-12-08 15:48:44,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:44,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2175 proven. 1849 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-12-08 15:48:45,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:45,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 46] total 72 [2018-12-08 15:48:45,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-12-08 15:48:45,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-12-08 15:48:45,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-12-08 15:48:45,883 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand 72 states. [2018-12-08 15:48:46,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:46,223 INFO L93 Difference]: Finished difference Result 244 states and 334 transitions. [2018-12-08 15:48:46,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-12-08 15:48:46,223 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 146 [2018-12-08 15:48:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:46,224 INFO L225 Difference]: With dead ends: 244 [2018-12-08 15:48:46,224 INFO L226 Difference]: Without dead ends: 152 [2018-12-08 15:48:46,226 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-12-08 15:48:46,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-12-08 15:48:46,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2018-12-08 15:48:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-12-08 15:48:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 195 transitions. [2018-12-08 15:48:46,231 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 195 transitions. Word has length 146 [2018-12-08 15:48:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:46,231 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 195 transitions. [2018-12-08 15:48:46,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-12-08 15:48:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 195 transitions. [2018-12-08 15:48:46,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-12-08 15:48:46,232 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:46,232 INFO L402 BasicCegarLoop]: trace histogram [70, 44, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:46,232 INFO L423 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:46,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2090699827, now seen corresponding path program 25 times [2018-12-08 15:48:46,233 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:46,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:46,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:46,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:46,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2349 proven. 702 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-12-08 15:48:46,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:46,463 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:46,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:46,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2349 proven. 702 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-12-08 15:48:46,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:46,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-12-08 15:48:46,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-08 15:48:46,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-08 15:48:46,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-12-08 15:48:46,518 INFO L87 Difference]: Start difference. First operand 151 states and 195 transitions. Second operand 29 states. [2018-12-08 15:48:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:46,569 INFO L93 Difference]: Finished difference Result 247 states and 336 transitions. [2018-12-08 15:48:46,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-08 15:48:46,569 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 150 [2018-12-08 15:48:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:46,570 INFO L225 Difference]: With dead ends: 247 [2018-12-08 15:48:46,570 INFO L226 Difference]: Without dead ends: 153 [2018-12-08 15:48:46,570 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-12-08 15:48:46,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-12-08 15:48:46,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-12-08 15:48:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-12-08 15:48:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2018-12-08 15:48:46,573 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 150 [2018-12-08 15:48:46,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:46,573 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2018-12-08 15:48:46,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-08 15:48:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2018-12-08 15:48:46,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-12-08 15:48:46,573 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:46,574 INFO L402 BasicCegarLoop]: trace histogram [71, 44, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:46,574 INFO L423 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:46,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:46,574 INFO L82 PathProgramCache]: Analyzing trace with hash -690793910, now seen corresponding path program 26 times [2018-12-08 15:48:46,574 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:46,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:46,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:46,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:46,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2436 proven. 756 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-12-08 15:48:46,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:46,790 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:46,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 15:48:46,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 15:48:46,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:46,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2436 proven. 756 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-12-08 15:48:46,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:46,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-12-08 15:48:46,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-12-08 15:48:46,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-12-08 15:48:46,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-08 15:48:46,851 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand 30 states. [2018-12-08 15:48:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:46,906 INFO L93 Difference]: Finished difference Result 249 states and 338 transitions. [2018-12-08 15:48:46,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-08 15:48:46,906 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 152 [2018-12-08 15:48:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:46,907 INFO L225 Difference]: With dead ends: 249 [2018-12-08 15:48:46,907 INFO L226 Difference]: Without dead ends: 155 [2018-12-08 15:48:46,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-12-08 15:48:46,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-12-08 15:48:46,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-12-08 15:48:46,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-12-08 15:48:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 199 transitions. [2018-12-08 15:48:46,910 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 199 transitions. Word has length 152 [2018-12-08 15:48:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:46,910 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 199 transitions. [2018-12-08 15:48:46,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-12-08 15:48:46,910 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 199 transitions. [2018-12-08 15:48:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-12-08 15:48:46,911 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:46,911 INFO L402 BasicCegarLoop]: trace histogram [72, 44, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:46,911 INFO L423 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:46,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:46,912 INFO L82 PathProgramCache]: Analyzing trace with hash 294028679, now seen corresponding path program 27 times [2018-12-08 15:48:46,912 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:46,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:46,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:46,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:46,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2523 proven. 812 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-12-08 15:48:47,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:47,178 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:47,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 15:48:47,234 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-12-08 15:48:47,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:47,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2523 proven. 812 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-12-08 15:48:47,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:47,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-12-08 15:48:47,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-08 15:48:47,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-08 15:48:47,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-12-08 15:48:47,263 INFO L87 Difference]: Start difference. First operand 155 states and 199 transitions. Second operand 31 states. [2018-12-08 15:48:47,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:47,339 INFO L93 Difference]: Finished difference Result 251 states and 340 transitions. [2018-12-08 15:48:47,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-08 15:48:47,340 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 154 [2018-12-08 15:48:47,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:47,340 INFO L225 Difference]: With dead ends: 251 [2018-12-08 15:48:47,340 INFO L226 Difference]: Without dead ends: 157 [2018-12-08 15:48:47,341 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-12-08 15:48:47,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-12-08 15:48:47,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-12-08 15:48:47,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-12-08 15:48:47,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 201 transitions. [2018-12-08 15:48:47,344 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 201 transitions. Word has length 154 [2018-12-08 15:48:47,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:47,344 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 201 transitions. [2018-12-08 15:48:47,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-08 15:48:47,344 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 201 transitions. [2018-12-08 15:48:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-12-08 15:48:47,344 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:47,344 INFO L402 BasicCegarLoop]: trace histogram [73, 44, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:47,345 INFO L423 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:47,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:47,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1815731588, now seen corresponding path program 28 times [2018-12-08 15:48:47,345 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:47,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:47,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:47,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:47,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2610 proven. 870 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-12-08 15:48:47,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:47,576 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:47,581 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 15:48:47,605 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 15:48:47,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:47,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2610 proven. 870 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-12-08 15:48:47,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:47,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-12-08 15:48:47,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-12-08 15:48:47,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-12-08 15:48:47,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-08 15:48:47,635 INFO L87 Difference]: Start difference. First operand 157 states and 201 transitions. Second operand 32 states. [2018-12-08 15:48:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:47,682 INFO L93 Difference]: Finished difference Result 253 states and 342 transitions. [2018-12-08 15:48:47,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-08 15:48:47,682 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 156 [2018-12-08 15:48:47,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:47,683 INFO L225 Difference]: With dead ends: 253 [2018-12-08 15:48:47,683 INFO L226 Difference]: Without dead ends: 159 [2018-12-08 15:48:47,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-12-08 15:48:47,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-12-08 15:48:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-12-08 15:48:47,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-12-08 15:48:47,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 203 transitions. [2018-12-08 15:48:47,686 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 203 transitions. Word has length 156 [2018-12-08 15:48:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:47,686 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 203 transitions. [2018-12-08 15:48:47,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-12-08 15:48:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 203 transitions. [2018-12-08 15:48:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-12-08 15:48:47,687 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:47,687 INFO L402 BasicCegarLoop]: trace histogram [74, 44, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:47,687 INFO L423 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:47,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:47,687 INFO L82 PathProgramCache]: Analyzing trace with hash -411620799, now seen corresponding path program 29 times [2018-12-08 15:48:47,687 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:47,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:47,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:47,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:47,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2697 proven. 930 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-12-08 15:48:47,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:47,966 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:47,974 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 15:48:48,072 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 75 check-sat command(s) [2018-12-08 15:48:48,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:48,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2697 proven. 930 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-12-08 15:48:48,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:48,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-12-08 15:48:48,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-12-08 15:48:48,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-12-08 15:48:48,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-12-08 15:48:48,112 INFO L87 Difference]: Start difference. First operand 159 states and 203 transitions. Second operand 33 states. [2018-12-08 15:48:48,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:48,186 INFO L93 Difference]: Finished difference Result 255 states and 344 transitions. [2018-12-08 15:48:48,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-08 15:48:48,186 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 158 [2018-12-08 15:48:48,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:48,187 INFO L225 Difference]: With dead ends: 255 [2018-12-08 15:48:48,187 INFO L226 Difference]: Without dead ends: 161 [2018-12-08 15:48:48,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-12-08 15:48:48,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-12-08 15:48:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-12-08 15:48:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-12-08 15:48:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 205 transitions. [2018-12-08 15:48:48,190 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 205 transitions. Word has length 158 [2018-12-08 15:48:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:48,190 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 205 transitions. [2018-12-08 15:48:48,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-12-08 15:48:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 205 transitions. [2018-12-08 15:48:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-12-08 15:48:48,191 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:48,191 INFO L402 BasicCegarLoop]: trace histogram [75, 44, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:48,191 INFO L423 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:48,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2003551298, now seen corresponding path program 30 times [2018-12-08 15:48:48,191 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:48,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:48,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:48,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:48,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2784 proven. 992 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2018-12-08 15:48:48,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:48,472 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:48,478 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 15:48:48,562 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 75 check-sat command(s) [2018-12-08 15:48:48,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:48,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2759 proven. 1936 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-12-08 15:48:49,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:49,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 47] total 79 [2018-12-08 15:48:49,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-12-08 15:48:49,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-12-08 15:48:49,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-12-08 15:48:49,668 INFO L87 Difference]: Start difference. First operand 161 states and 205 transitions. Second operand 79 states. [2018-12-08 15:48:50,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:50,159 INFO L93 Difference]: Finished difference Result 260 states and 352 transitions. [2018-12-08 15:48:50,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-12-08 15:48:50,159 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 160 [2018-12-08 15:48:50,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:50,161 INFO L225 Difference]: With dead ends: 260 [2018-12-08 15:48:50,161 INFO L226 Difference]: Without dead ends: 166 [2018-12-08 15:48:50,163 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-12-08 15:48:50,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-12-08 15:48:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2018-12-08 15:48:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-12-08 15:48:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 210 transitions. [2018-12-08 15:48:50,170 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 210 transitions. Word has length 160 [2018-12-08 15:48:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:50,171 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 210 transitions. [2018-12-08 15:48:50,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-12-08 15:48:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 210 transitions. [2018-12-08 15:48:50,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-12-08 15:48:50,173 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:50,173 INFO L402 BasicCegarLoop]: trace histogram [77, 45, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:50,173 INFO L423 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:50,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:50,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1220455370, now seen corresponding path program 31 times [2018-12-08 15:48:50,174 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:50,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:50,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:50,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:50,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2937 proven. 1056 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:50,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:50,520 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:50,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:50,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2937 proven. 1056 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:50,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:50,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-12-08 15:48:50,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-12-08 15:48:50,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-12-08 15:48:50,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-12-08 15:48:50,578 INFO L87 Difference]: Start difference. First operand 165 states and 210 transitions. Second operand 35 states. [2018-12-08 15:48:50,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:50,629 INFO L93 Difference]: Finished difference Result 263 states and 354 transitions. [2018-12-08 15:48:50,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-08 15:48:50,629 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 164 [2018-12-08 15:48:50,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:50,629 INFO L225 Difference]: With dead ends: 263 [2018-12-08 15:48:50,629 INFO L226 Difference]: Without dead ends: 167 [2018-12-08 15:48:50,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-12-08 15:48:50,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-12-08 15:48:50,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-12-08 15:48:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-12-08 15:48:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 212 transitions. [2018-12-08 15:48:50,634 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 212 transitions. Word has length 164 [2018-12-08 15:48:50,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:50,634 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 212 transitions. [2018-12-08 15:48:50,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-12-08 15:48:50,635 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 212 transitions. [2018-12-08 15:48:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-12-08 15:48:50,635 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:50,635 INFO L402 BasicCegarLoop]: trace histogram [78, 45, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:50,636 INFO L423 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:50,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:50,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1828230131, now seen corresponding path program 32 times [2018-12-08 15:48:50,636 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:50,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:50,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:50,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:50,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 3026 proven. 1122 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:50,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:50,946 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:50,952 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 15:48:50,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 15:48:50,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:50,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 3026 proven. 1122 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:51,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:51,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-12-08 15:48:51,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-08 15:48:51,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-08 15:48:51,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 15:48:51,003 INFO L87 Difference]: Start difference. First operand 167 states and 212 transitions. Second operand 36 states. [2018-12-08 15:48:51,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:51,065 INFO L93 Difference]: Finished difference Result 265 states and 356 transitions. [2018-12-08 15:48:51,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-08 15:48:51,065 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 166 [2018-12-08 15:48:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:51,065 INFO L225 Difference]: With dead ends: 265 [2018-12-08 15:48:51,065 INFO L226 Difference]: Without dead ends: 169 [2018-12-08 15:48:51,066 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 15:48:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-12-08 15:48:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-12-08 15:48:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-12-08 15:48:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 214 transitions. [2018-12-08 15:48:51,068 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 214 transitions. Word has length 166 [2018-12-08 15:48:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:51,068 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 214 transitions. [2018-12-08 15:48:51,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-08 15:48:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 214 transitions. [2018-12-08 15:48:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-12-08 15:48:51,069 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:51,069 INFO L402 BasicCegarLoop]: trace histogram [79, 45, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:51,069 INFO L423 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:51,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1847666576, now seen corresponding path program 33 times [2018-12-08 15:48:51,069 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:51,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:51,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:51,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:51,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3115 proven. 1190 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:51,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:51,405 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:51,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 15:48:51,478 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-12-08 15:48:51,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:51,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3115 proven. 1190 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:51,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:51,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-12-08 15:48:51,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-12-08 15:48:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-12-08 15:48:51,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-12-08 15:48:51,509 INFO L87 Difference]: Start difference. First operand 169 states and 214 transitions. Second operand 37 states. [2018-12-08 15:48:51,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:51,588 INFO L93 Difference]: Finished difference Result 267 states and 358 transitions. [2018-12-08 15:48:51,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-08 15:48:51,588 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 168 [2018-12-08 15:48:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:51,588 INFO L225 Difference]: With dead ends: 267 [2018-12-08 15:48:51,588 INFO L226 Difference]: Without dead ends: 171 [2018-12-08 15:48:51,589 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-12-08 15:48:51,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-12-08 15:48:51,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-12-08 15:48:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-12-08 15:48:51,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 216 transitions. [2018-12-08 15:48:51,591 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 216 transitions. Word has length 168 [2018-12-08 15:48:51,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:51,591 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 216 transitions. [2018-12-08 15:48:51,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-12-08 15:48:51,591 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 216 transitions. [2018-12-08 15:48:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-12-08 15:48:51,592 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:51,592 INFO L402 BasicCegarLoop]: trace histogram [80, 45, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:51,592 INFO L423 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:51,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:51,592 INFO L82 PathProgramCache]: Analyzing trace with hash 373682605, now seen corresponding path program 34 times [2018-12-08 15:48:51,592 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:51,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:51,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:51,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:51,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 3204 proven. 1260 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:51,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:51,910 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:51,916 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 15:48:51,938 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 15:48:51,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:51,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 3204 proven. 1260 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:51,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:51,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-12-08 15:48:51,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-12-08 15:48:51,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-12-08 15:48:51,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-12-08 15:48:51,979 INFO L87 Difference]: Start difference. First operand 171 states and 216 transitions. Second operand 38 states. [2018-12-08 15:48:52,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:52,055 INFO L93 Difference]: Finished difference Result 269 states and 360 transitions. [2018-12-08 15:48:52,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-08 15:48:52,055 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 170 [2018-12-08 15:48:52,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:52,056 INFO L225 Difference]: With dead ends: 269 [2018-12-08 15:48:52,056 INFO L226 Difference]: Without dead ends: 173 [2018-12-08 15:48:52,056 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-12-08 15:48:52,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-12-08 15:48:52,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-12-08 15:48:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-12-08 15:48:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 218 transitions. [2018-12-08 15:48:52,060 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 218 transitions. Word has length 170 [2018-12-08 15:48:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:52,060 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 218 transitions. [2018-12-08 15:48:52,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-12-08 15:48:52,061 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 218 transitions. [2018-12-08 15:48:52,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-12-08 15:48:52,061 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:52,061 INFO L402 BasicCegarLoop]: trace histogram [81, 45, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:52,062 INFO L423 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:52,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:52,062 INFO L82 PathProgramCache]: Analyzing trace with hash 491499434, now seen corresponding path program 35 times [2018-12-08 15:48:52,062 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:52,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:52,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:52,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:52,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 3293 proven. 1332 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:52,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:52,452 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:52,458 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 15:48:52,534 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2018-12-08 15:48:52,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:52,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 3293 proven. 1332 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:52,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:52,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-12-08 15:48:52,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-12-08 15:48:52,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-12-08 15:48:52,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-12-08 15:48:52,575 INFO L87 Difference]: Start difference. First operand 173 states and 218 transitions. Second operand 39 states. [2018-12-08 15:48:52,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:52,646 INFO L93 Difference]: Finished difference Result 271 states and 362 transitions. [2018-12-08 15:48:52,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-12-08 15:48:52,646 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 172 [2018-12-08 15:48:52,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:52,646 INFO L225 Difference]: With dead ends: 271 [2018-12-08 15:48:52,646 INFO L226 Difference]: Without dead ends: 175 [2018-12-08 15:48:52,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-12-08 15:48:52,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-12-08 15:48:52,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-12-08 15:48:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-12-08 15:48:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 220 transitions. [2018-12-08 15:48:52,649 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 220 transitions. Word has length 172 [2018-12-08 15:48:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:52,649 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 220 transitions. [2018-12-08 15:48:52,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-12-08 15:48:52,650 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 220 transitions. [2018-12-08 15:48:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-12-08 15:48:52,650 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:52,650 INFO L402 BasicCegarLoop]: trace histogram [82, 45, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:52,650 INFO L423 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:52,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:52,650 INFO L82 PathProgramCache]: Analyzing trace with hash 2044322407, now seen corresponding path program 36 times [2018-12-08 15:48:52,650 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:52,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:52,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:52,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:52,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 3382 proven. 1406 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:53,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:53,011 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:53,016 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 15:48:53,093 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2018-12-08 15:48:53,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:53,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 3382 proven. 1406 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:53,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:53,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-12-08 15:48:53,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-12-08 15:48:53,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-12-08 15:48:53,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-08 15:48:53,134 INFO L87 Difference]: Start difference. First operand 175 states and 220 transitions. Second operand 40 states. [2018-12-08 15:48:53,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:53,212 INFO L93 Difference]: Finished difference Result 273 states and 364 transitions. [2018-12-08 15:48:53,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-08 15:48:53,212 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 174 [2018-12-08 15:48:53,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:53,213 INFO L225 Difference]: With dead ends: 273 [2018-12-08 15:48:53,213 INFO L226 Difference]: Without dead ends: 177 [2018-12-08 15:48:53,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-12-08 15:48:53,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-12-08 15:48:53,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-12-08 15:48:53,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-12-08 15:48:53,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 222 transitions. [2018-12-08 15:48:53,216 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 222 transitions. Word has length 174 [2018-12-08 15:48:53,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:53,216 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 222 transitions. [2018-12-08 15:48:53,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-12-08 15:48:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 222 transitions. [2018-12-08 15:48:53,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-12-08 15:48:53,217 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:53,217 INFO L402 BasicCegarLoop]: trace histogram [83, 45, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:53,218 INFO L423 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:53,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:53,218 INFO L82 PathProgramCache]: Analyzing trace with hash -341419548, now seen corresponding path program 37 times [2018-12-08 15:48:53,218 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:53,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:53,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:53,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:53,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3471 proven. 1482 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:53,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:53,595 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:53,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:53,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3471 proven. 1482 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:53,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:53,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-12-08 15:48:53,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-12-08 15:48:53,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-12-08 15:48:53,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-12-08 15:48:53,654 INFO L87 Difference]: Start difference. First operand 177 states and 222 transitions. Second operand 41 states. [2018-12-08 15:48:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:53,705 INFO L93 Difference]: Finished difference Result 275 states and 366 transitions. [2018-12-08 15:48:53,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-08 15:48:53,706 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 176 [2018-12-08 15:48:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:53,706 INFO L225 Difference]: With dead ends: 275 [2018-12-08 15:48:53,706 INFO L226 Difference]: Without dead ends: 179 [2018-12-08 15:48:53,707 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-12-08 15:48:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-12-08 15:48:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-12-08 15:48:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-12-08 15:48:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 224 transitions. [2018-12-08 15:48:53,709 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 224 transitions. Word has length 176 [2018-12-08 15:48:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:53,709 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 224 transitions. [2018-12-08 15:48:53,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-12-08 15:48:53,709 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 224 transitions. [2018-12-08 15:48:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-12-08 15:48:53,710 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:53,710 INFO L402 BasicCegarLoop]: trace histogram [84, 45, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:53,710 INFO L423 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:53,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:53,710 INFO L82 PathProgramCache]: Analyzing trace with hash 473097761, now seen corresponding path program 38 times [2018-12-08 15:48:53,710 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:53,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:53,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:53,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:53,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 3560 proven. 1560 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:54,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:54,106 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:54,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 15:48:54,136 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 15:48:54,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:54,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 3560 proven. 1560 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:54,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:54,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-12-08 15:48:54,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-12-08 15:48:54,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-12-08 15:48:54,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-12-08 15:48:54,176 INFO L87 Difference]: Start difference. First operand 179 states and 224 transitions. Second operand 42 states. [2018-12-08 15:48:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:54,250 INFO L93 Difference]: Finished difference Result 277 states and 368 transitions. [2018-12-08 15:48:54,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-12-08 15:48:54,251 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 178 [2018-12-08 15:48:54,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:54,251 INFO L225 Difference]: With dead ends: 277 [2018-12-08 15:48:54,251 INFO L226 Difference]: Without dead ends: 181 [2018-12-08 15:48:54,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-12-08 15:48:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-12-08 15:48:54,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-12-08 15:48:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-12-08 15:48:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 226 transitions. [2018-12-08 15:48:54,254 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 226 transitions. Word has length 178 [2018-12-08 15:48:54,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:54,254 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 226 transitions. [2018-12-08 15:48:54,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-12-08 15:48:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 226 transitions. [2018-12-08 15:48:54,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-12-08 15:48:54,254 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:54,254 INFO L402 BasicCegarLoop]: trace histogram [85, 45, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:54,255 INFO L423 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:54,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:54,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1540183838, now seen corresponding path program 39 times [2018-12-08 15:48:54,255 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:54,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:54,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:54,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:54,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3649 proven. 1640 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:54,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:54,662 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:54,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 15:48:54,746 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 83 check-sat command(s) [2018-12-08 15:48:54,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:54,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 3649 proven. 1640 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:54,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:54,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-12-08 15:48:54,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-12-08 15:48:54,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-12-08 15:48:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-12-08 15:48:54,791 INFO L87 Difference]: Start difference. First operand 181 states and 226 transitions. Second operand 43 states. [2018-12-08 15:48:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:54,864 INFO L93 Difference]: Finished difference Result 279 states and 370 transitions. [2018-12-08 15:48:54,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-08 15:48:54,864 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 180 [2018-12-08 15:48:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:54,864 INFO L225 Difference]: With dead ends: 279 [2018-12-08 15:48:54,864 INFO L226 Difference]: Without dead ends: 183 [2018-12-08 15:48:54,865 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-12-08 15:48:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-12-08 15:48:54,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-12-08 15:48:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-12-08 15:48:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 228 transitions. [2018-12-08 15:48:54,867 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 228 transitions. Word has length 180 [2018-12-08 15:48:54,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:54,867 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 228 transitions. [2018-12-08 15:48:54,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-12-08 15:48:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 228 transitions. [2018-12-08 15:48:54,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-12-08 15:48:54,868 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:54,868 INFO L402 BasicCegarLoop]: trace histogram [86, 45, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:54,868 INFO L423 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:54,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:54,868 INFO L82 PathProgramCache]: Analyzing trace with hash 512720091, now seen corresponding path program 40 times [2018-12-08 15:48:54,868 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:54,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:54,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:54,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:54,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3738 proven. 1722 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:55,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:55,292 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:55,298 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 15:48:55,322 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 15:48:55,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:55,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3738 proven. 1722 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:55,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:55,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-12-08 15:48:55,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-12-08 15:48:55,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-12-08 15:48:55,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-12-08 15:48:55,354 INFO L87 Difference]: Start difference. First operand 183 states and 228 transitions. Second operand 44 states. [2018-12-08 15:48:55,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:55,435 INFO L93 Difference]: Finished difference Result 281 states and 372 transitions. [2018-12-08 15:48:55,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-08 15:48:55,435 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 182 [2018-12-08 15:48:55,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:55,436 INFO L225 Difference]: With dead ends: 281 [2018-12-08 15:48:55,436 INFO L226 Difference]: Without dead ends: 185 [2018-12-08 15:48:55,436 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-12-08 15:48:55,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-12-08 15:48:55,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-12-08 15:48:55,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-12-08 15:48:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 230 transitions. [2018-12-08 15:48:55,440 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 230 transitions. Word has length 182 [2018-12-08 15:48:55,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:55,440 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 230 transitions. [2018-12-08 15:48:55,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-12-08 15:48:55,440 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 230 transitions. [2018-12-08 15:48:55,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-12-08 15:48:55,441 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:55,441 INFO L402 BasicCegarLoop]: trace histogram [87, 45, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:55,441 INFO L423 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:55,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:55,441 INFO L82 PathProgramCache]: Analyzing trace with hash 962537304, now seen corresponding path program 41 times [2018-12-08 15:48:55,441 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:55,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:55,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:55,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:55,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3827 proven. 1806 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:55,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:55,908 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:55,914 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 15:48:55,998 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 88 check-sat command(s) [2018-12-08 15:48:55,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:56,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3827 proven. 1806 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:56,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:56,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-12-08 15:48:56,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-12-08 15:48:56,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-12-08 15:48:56,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-12-08 15:48:56,042 INFO L87 Difference]: Start difference. First operand 185 states and 230 transitions. Second operand 45 states. [2018-12-08 15:48:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:56,112 INFO L93 Difference]: Finished difference Result 283 states and 374 transitions. [2018-12-08 15:48:56,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-08 15:48:56,112 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 184 [2018-12-08 15:48:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:56,113 INFO L225 Difference]: With dead ends: 283 [2018-12-08 15:48:56,113 INFO L226 Difference]: Without dead ends: 187 [2018-12-08 15:48:56,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-12-08 15:48:56,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-12-08 15:48:56,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-12-08 15:48:56,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-12-08 15:48:56,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 232 transitions. [2018-12-08 15:48:56,116 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 232 transitions. Word has length 184 [2018-12-08 15:48:56,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:56,116 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 232 transitions. [2018-12-08 15:48:56,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-12-08 15:48:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 232 transitions. [2018-12-08 15:48:56,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-12-08 15:48:56,116 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:56,116 INFO L402 BasicCegarLoop]: trace histogram [88, 45, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:56,116 INFO L423 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:56,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:56,117 INFO L82 PathProgramCache]: Analyzing trace with hash -554817899, now seen corresponding path program 42 times [2018-12-08 15:48:56,117 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:56,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:56,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:56,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:56,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 3916 proven. 1892 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2018-12-08 15:48:56,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:56,584 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:56,590 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 15:48:56,670 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 88 check-sat command(s) [2018-12-08 15:48:56,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:56,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 3913 proven. 2025 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2018-12-08 15:48:58,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:58,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 48] total 92 [2018-12-08 15:48:58,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-12-08 15:48:58,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-12-08 15:48:58,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-12-08 15:48:58,167 INFO L87 Difference]: Start difference. First operand 187 states and 232 transitions. Second operand 92 states. [2018-12-08 15:48:58,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:58,744 INFO L93 Difference]: Finished difference Result 288 states and 382 transitions. [2018-12-08 15:48:58,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-12-08 15:48:58,744 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 186 [2018-12-08 15:48:58,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:58,745 INFO L225 Difference]: With dead ends: 288 [2018-12-08 15:48:58,745 INFO L226 Difference]: Without dead ends: 192 [2018-12-08 15:48:58,746 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-12-08 15:48:58,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-12-08 15:48:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2018-12-08 15:48:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-12-08 15:48:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 237 transitions. [2018-12-08 15:48:58,748 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 237 transitions. Word has length 186 [2018-12-08 15:48:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:58,748 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 237 transitions. [2018-12-08 15:48:58,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-12-08 15:48:58,748 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 237 transitions. [2018-12-08 15:48:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-12-08 15:48:58,749 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:58,749 INFO L402 BasicCegarLoop]: trace histogram [90, 46, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:58,749 INFO L423 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:58,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:58,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1494283021, now seen corresponding path program 43 times [2018-12-08 15:48:58,749 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:58,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:58,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:58,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:48:58,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 4095 proven. 1980 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2018-12-08 15:48:59,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:59,234 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:59,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:59,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 4095 proven. 1980 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2018-12-08 15:48:59,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:59,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-12-08 15:48:59,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-12-08 15:48:59,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-12-08 15:48:59,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-12-08 15:48:59,307 INFO L87 Difference]: Start difference. First operand 191 states and 237 transitions. Second operand 47 states. [2018-12-08 15:48:59,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:48:59,373 INFO L93 Difference]: Finished difference Result 291 states and 384 transitions. [2018-12-08 15:48:59,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-12-08 15:48:59,373 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 190 [2018-12-08 15:48:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:48:59,374 INFO L225 Difference]: With dead ends: 291 [2018-12-08 15:48:59,374 INFO L226 Difference]: Without dead ends: 193 [2018-12-08 15:48:59,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-12-08 15:48:59,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-12-08 15:48:59,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-12-08 15:48:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-12-08 15:48:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 239 transitions. [2018-12-08 15:48:59,377 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 239 transitions. Word has length 190 [2018-12-08 15:48:59,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:48:59,377 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 239 transitions. [2018-12-08 15:48:59,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-12-08 15:48:59,377 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 239 transitions. [2018-12-08 15:48:59,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-12-08 15:48:59,377 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:48:59,377 INFO L402 BasicCegarLoop]: trace histogram [91, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:48:59,378 INFO L423 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:48:59,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:48:59,378 INFO L82 PathProgramCache]: Analyzing trace with hash 201379978, now seen corresponding path program 44 times [2018-12-08 15:48:59,378 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:48:59,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:48:59,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:59,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:48:59,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:48:59,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:48:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 4186 proven. 2070 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2018-12-08 15:48:59,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:48:59,902 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:48:59,908 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-08 15:48:59,933 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-08 15:48:59,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:48:59,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:48:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 4186 proven. 2070 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2018-12-08 15:48:59,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:48:59,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-12-08 15:48:59,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-12-08 15:48:59,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-12-08 15:48:59,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-12-08 15:48:59,966 INFO L87 Difference]: Start difference. First operand 193 states and 239 transitions. Second operand 48 states. [2018-12-08 15:49:00,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:49:00,034 INFO L93 Difference]: Finished difference Result 293 states and 386 transitions. [2018-12-08 15:49:00,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-12-08 15:49:00,035 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 192 [2018-12-08 15:49:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:49:00,035 INFO L225 Difference]: With dead ends: 293 [2018-12-08 15:49:00,035 INFO L226 Difference]: Without dead ends: 195 [2018-12-08 15:49:00,035 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-12-08 15:49:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-12-08 15:49:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-12-08 15:49:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-12-08 15:49:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 241 transitions. [2018-12-08 15:49:00,038 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 241 transitions. Word has length 192 [2018-12-08 15:49:00,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:49:00,038 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 241 transitions. [2018-12-08 15:49:00,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-12-08 15:49:00,038 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 241 transitions. [2018-12-08 15:49:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-12-08 15:49:00,039 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:49:00,039 INFO L402 BasicCegarLoop]: trace histogram [92, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:49:00,039 INFO L423 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:49:00,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:49:00,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1032895801, now seen corresponding path program 45 times [2018-12-08 15:49:00,039 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:49:00,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:49:00,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:49:00,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:49:00,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:49:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:49:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 4277 proven. 2162 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2018-12-08 15:49:00,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:49:00,581 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:49:00,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 15:49:00,675 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2018-12-08 15:49:00,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:49:00,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:49:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:49:02,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:49:02,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 95] total 95 [2018-12-08 15:49:02,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-12-08 15:49:02,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-12-08 15:49:02,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-12-08 15:49:02,166 INFO L87 Difference]: Start difference. First operand 195 states and 241 transitions. Second operand 95 states. [2018-12-08 15:49:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:49:02,610 INFO L93 Difference]: Finished difference Result 301 states and 397 transitions. [2018-12-08 15:49:02,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-12-08 15:49:02,610 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 194 [2018-12-08 15:49:02,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:49:02,611 INFO L225 Difference]: With dead ends: 301 [2018-12-08 15:49:02,611 INFO L226 Difference]: Without dead ends: 203 [2018-12-08 15:49:02,611 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-12-08 15:49:02,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-12-08 15:49:02,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-12-08 15:49:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-12-08 15:49:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 249 transitions. [2018-12-08 15:49:02,615 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 249 transitions. Word has length 194 [2018-12-08 15:49:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:49:02,615 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 249 transitions. [2018-12-08 15:49:02,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-12-08 15:49:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 249 transitions. [2018-12-08 15:49:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-12-08 15:49:02,616 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:49:02,616 INFO L402 BasicCegarLoop]: trace histogram [96, 50, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:49:02,616 INFO L423 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:49:02,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:49:02,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1281156293, now seen corresponding path program 46 times [2018-12-08 15:49:02,616 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:49:02,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:49:02,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:49:02,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:49:02,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:49:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:49:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 4656 proven. 2304 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2018-12-08 15:49:03,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:49:03,211 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:49:03,216 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 15:49:03,242 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 15:49:03,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:49:03,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:49:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:49:03,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:49:03,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 99] total 101 [2018-12-08 15:49:03,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-12-08 15:49:03,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-12-08 15:49:03,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-12-08 15:49:03,904 INFO L87 Difference]: Start difference. First operand 203 states and 249 transitions. Second operand 101 states. [2018-12-08 15:49:04,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:49:04,365 INFO L93 Difference]: Finished difference Result 215 states and 267 transitions. [2018-12-08 15:49:04,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-12-08 15:49:04,365 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 202 [2018-12-08 15:49:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:49:04,366 INFO L225 Difference]: With dead ends: 215 [2018-12-08 15:49:04,366 INFO L226 Difference]: Without dead ends: 210 [2018-12-08 15:49:04,367 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4800 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-12-08 15:49:04,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-12-08 15:49:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-12-08 15:49:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-12-08 15:49:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 258 transitions. [2018-12-08 15:49:04,372 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 258 transitions. Word has length 202 [2018-12-08 15:49:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:49:04,373 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 258 transitions. [2018-12-08 15:49:04,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-12-08 15:49:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 258 transitions. [2018-12-08 15:49:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-12-08 15:49:04,374 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:49:04,374 INFO L402 BasicCegarLoop]: trace histogram [99, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:49:04,375 INFO L423 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:49:04,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:49:04,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1190218156, now seen corresponding path program 47 times [2018-12-08 15:49:04,375 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:49:04,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:49:04,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:49:04,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:49:04,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:49:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:49:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 4950 proven. 2401 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-12-08 15:49:05,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:49:05,029 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:49:05,035 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-08 15:49:05,140 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 100 check-sat command(s) [2018-12-08 15:49:05,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:49:05,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:49:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 4950 proven. 2401 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-12-08 15:49:05,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:49:05,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-12-08 15:49:05,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-08 15:49:05,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-08 15:49:05,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-08 15:49:05,177 INFO L87 Difference]: Start difference. First operand 209 states and 258 transitions. Second operand 52 states. [2018-12-08 15:49:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:49:05,349 INFO L93 Difference]: Finished difference Result 216 states and 266 transitions. [2018-12-08 15:49:05,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-12-08 15:49:05,349 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 208 [2018-12-08 15:49:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:49:05,350 INFO L225 Difference]: With dead ends: 216 [2018-12-08 15:49:05,350 INFO L226 Difference]: Without dead ends: 211 [2018-12-08 15:49:05,350 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-08 15:49:05,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-12-08 15:49:05,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-12-08 15:49:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-12-08 15:49:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 261 transitions. [2018-12-08 15:49:05,353 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 261 transitions. Word has length 208 [2018-12-08 15:49:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:49:05,354 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 261 transitions. [2018-12-08 15:49:05,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-08 15:49:05,354 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 261 transitions. [2018-12-08 15:49:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-12-08 15:49:05,354 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:49:05,354 INFO L402 BasicCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:49:05,354 INFO L423 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:49:05,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:49:05,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1853582425, now seen corresponding path program 48 times [2018-12-08 15:49:05,355 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:49:05,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:49:05,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:49:05,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:49:05,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:49:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:49:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-12-08 15:49:06,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:49:06,326 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/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 [2018-12-08 15:49:06,333 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-08 15:49:06,441 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2018-12-08 15:49:06,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 15:49:06,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:49:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-12-08 15:49:06,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:49:06,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-12-08 15:49:06,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-12-08 15:49:06,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-12-08 15:49:06,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-12-08 15:49:06,584 INFO L87 Difference]: Start difference. First operand 211 states and 261 transitions. Second operand 55 states. [2018-12-08 15:49:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:49:07,471 INFO L93 Difference]: Finished difference Result 2867 states and 4242 transitions. [2018-12-08 15:49:07,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-08 15:49:07,471 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 210 [2018-12-08 15:49:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:49:07,475 INFO L225 Difference]: With dead ends: 2867 [2018-12-08 15:49:07,476 INFO L226 Difference]: Without dead ends: 2862 [2018-12-08 15:49:07,476 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 208 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2018-12-08 15:49:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2018-12-08 15:49:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 213. [2018-12-08 15:49:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-12-08 15:49:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 264 transitions. [2018-12-08 15:49:07,526 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 264 transitions. Word has length 210 [2018-12-08 15:49:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:49:07,526 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 264 transitions. [2018-12-08 15:49:07,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-12-08 15:49:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 264 transitions. [2018-12-08 15:49:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-12-08 15:49:07,527 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:49:07,527 INFO L402 BasicCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:49:07,528 INFO L423 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:49:07,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:49:07,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2073212190, now seen corresponding path program 49 times [2018-12-08 15:49:07,528 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-08 15:49:07,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-08 15:49:07,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:49:07,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 15:49:07,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:49:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:49:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-12-08 15:49:08,173 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:49:08,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2018-12-08 15:49:08,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-08 15:49:08,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-08 15:49:08,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-08 15:49:08,174 INFO L87 Difference]: Start difference. First operand 213 states and 264 transitions. Second operand 52 states. [2018-12-08 15:49:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:49:08,306 INFO L93 Difference]: Finished difference Result 312 states and 412 transitions. [2018-12-08 15:49:08,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-12-08 15:49:08,307 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 212 [2018-12-08 15:49:08,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:49:08,307 INFO L225 Difference]: With dead ends: 312 [2018-12-08 15:49:08,307 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 15:49:08,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-12-08 15:49:08,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 15:49:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 15:49:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 15:49:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 15:49:08,308 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 212 [2018-12-08 15:49:08,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:49:08,308 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 15:49:08,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-08 15:49:08,308 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 15:49:08,308 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 15:49:08,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-08 15:49:08,692 WARN L180 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 1832 DAG size of output: 407 [2018-12-08 15:49:09,519 WARN L180 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 357 [2018-12-08 15:49:09,523 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-08 15:49:09,523 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-08 15:49:09,524 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-08 15:49:09,524 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-08 15:49:09,524 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-08 15:49:09,524 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-08 15:49:09,524 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 23) the Hoare annotation is: true [2018-12-08 15:49:09,524 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 23) no Hoare annotation was computed. [2018-12-08 15:49:09,524 INFO L448 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-12-08 15:49:09,524 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 19) no Hoare annotation was computed. [2018-12-08 15:49:09,524 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 23) no Hoare annotation was computed. [2018-12-08 15:49:09,525 INFO L444 ceAbstractionStarter]: At program point L14-2(lines 13 20) the Hoare annotation is: (or (and (and (<= main_~x~0 99) (<= 99 main_~y~0) (<= main_~y~0 99)) (<= 99 main_~x~0)) (and (and (<= main_~y~0 92) (<= 92 main_~y~0) (<= main_~x~0 92)) (<= 92 main_~x~0)) (and (<= 65 main_~x~0) (and (<= main_~y~0 65) (<= 65 main_~y~0) (<= main_~x~0 65))) (and (and (<= main_~y~0 100) (< 99 main_~y~0)) (<= 100 main_~x~0)) (and (<= 64 main_~x~0) (and (<= main_~x~0 64) (<= 64 main_~y~0) (<= main_~y~0 64))) (and (<= 76 main_~x~0) (and (<= main_~y~0 76) (<= main_~x~0 76) (<= 76 main_~y~0))) (and (<= 87 main_~x~0) (and (<= main_~x~0 87) (<= main_~y~0 87) (<= 87 main_~y~0))) (and (and (<= main_~y~0 78) (<= 78 main_~y~0) (<= main_~x~0 78)) (<= 78 main_~x~0)) (and (<= 72 main_~x~0) (and (<= main_~y~0 72) (<= main_~x~0 72) (<= 72 main_~y~0))) (and (and (<= main_~y~0 69) (<= 69 main_~y~0) (<= main_~x~0 69)) (<= 69 main_~x~0)) (and (<= 60 main_~x~0) (and (<= main_~x~0 60) (<= main_~y~0 60) (<= 60 main_~y~0))) (and (<= 67 main_~x~0) (and (<= main_~y~0 67) (<= main_~x~0 67) (<= 67 main_~y~0))) (and (and (<= main_~y~0 55) (<= 55 main_~y~0) (<= main_~x~0 55)) (<= 55 main_~x~0)) (and (and (<= 73 main_~y~0) (<= main_~x~0 73) (<= main_~y~0 73)) (<= 73 main_~x~0)) (and (<= 66 main_~x~0) (and (<= main_~y~0 66) (<= 66 main_~y~0) (<= main_~x~0 66))) (and (and (<= main_~x~0 70) (<= main_~y~0 70) (<= 70 main_~y~0)) (<= 70 main_~x~0)) (and (and (<= main_~x~0 95) (<= main_~y~0 95) (<= 95 main_~y~0)) (<= 95 main_~x~0)) (and (and (<= 90 main_~y~0) (<= main_~y~0 90) (<= main_~x~0 90)) (<= 90 main_~x~0)) (and (and (<= main_~y~0 59) (<= main_~x~0 59) (<= 59 main_~y~0)) (<= 59 main_~x~0)) (and (<= 85 main_~x~0) (and (<= 85 main_~y~0) (<= main_~x~0 85) (<= main_~y~0 85))) (and (<= 63 main_~x~0) (and (<= main_~y~0 63) (<= main_~x~0 63) (<= 63 main_~y~0))) (and (and (<= main_~y~0 77) (<= main_~x~0 77) (<= 77 main_~y~0)) (<= 77 main_~x~0)) (and (<= 53 main_~x~0) (and (<= main_~y~0 53) (<= main_~x~0 53) (<= 53 main_~y~0))) (and (and (<= main_~x~0 79) (<= main_~y~0 79) (<= 79 main_~y~0)) (<= 79 main_~x~0)) (and (<= 68 main_~x~0) (and (<= 68 main_~y~0) (<= main_~y~0 68) (<= main_~x~0 68))) (and (<= 51 main_~x~0) (and (<= 51 main_~y~0) (<= main_~x~0 51) (<= main_~y~0 51))) (and (<= 54 main_~x~0) (and (<= main_~x~0 54) (<= 54 main_~y~0) (<= main_~y~0 54))) (and (and (<= 56 main_~y~0) (<= main_~x~0 56) (<= main_~y~0 56)) (<= 56 main_~x~0)) (and (<= 61 main_~x~0) (and (<= main_~y~0 61) (<= 61 main_~y~0) (<= main_~x~0 61))) (and (<= 88 main_~x~0) (and (<= main_~x~0 88) (<= main_~y~0 88) (<= 88 main_~y~0))) (and (<= main_~y~0 50) (<= main_~x~0 50) (<= 50 main_~y~0)) (and (<= 80 main_~x~0) (and (<= main_~x~0 80) (<= 80 main_~y~0) (<= main_~y~0 80))) (and (<= 94 main_~x~0) (and (<= main_~x~0 94) (<= main_~y~0 94) (<= 94 main_~y~0))) (and (<= 89 main_~x~0) (and (<= 89 main_~y~0) (<= main_~y~0 89) (<= main_~x~0 89))) (and (and (<= 86 main_~y~0) (<= main_~x~0 86) (<= main_~y~0 86)) (<= 86 main_~x~0)) (and (<= 58 main_~x~0) (and (<= main_~x~0 58) (<= main_~y~0 58) (<= 58 main_~y~0))) (and (and (<= main_~x~0 91) (<= 91 main_~y~0) (<= main_~y~0 91)) (<= 91 main_~x~0)) (and (and (<= 52 main_~y~0) (<= main_~y~0 52) (<= main_~x~0 52)) (<= 52 main_~x~0)) (and (<= 93 main_~x~0) (and (<= main_~x~0 93) (<= 93 main_~y~0) (<= main_~y~0 93))) (and (<= 74 main_~x~0) (and (<= 74 main_~y~0) (<= main_~y~0 74) (<= main_~x~0 74))) (and (and (<= main_~y~0 71) (<= main_~x~0 71) (<= 71 main_~y~0)) (<= 71 main_~x~0)) (and (<= 57 main_~x~0) (and (<= 57 main_~y~0) (<= main_~x~0 57) (<= main_~y~0 57))) (and (<= 97 main_~x~0) (and (<= 97 main_~y~0) (<= main_~x~0 97) (<= main_~y~0 97))) (and (and (<= main_~x~0 81) (<= 81 main_~y~0) (<= main_~y~0 81)) (<= 81 main_~x~0)) (and (<= 84 main_~x~0) (and (<= main_~y~0 84) (<= 84 main_~y~0) (<= main_~x~0 84))) (and (and (<= 96 main_~y~0) (<= main_~x~0 96) (<= main_~y~0 96)) (<= 96 main_~x~0)) (and (<= 83 main_~x~0) (and (<= main_~y~0 83) (<= 83 main_~y~0) (<= main_~x~0 83))) (and (<= 62 main_~x~0) (and (<= main_~y~0 62) (<= main_~x~0 62) (<= 62 main_~y~0))) (and (and (<= main_~x~0 98) (<= main_~y~0 98) (<= 98 main_~y~0)) (<= 98 main_~x~0)) (and (and (<= 75 main_~y~0) (<= main_~x~0 75) (<= main_~y~0 75)) (<= 75 main_~x~0)) (and (and (<= 82 main_~y~0) (<= main_~y~0 82) (<= main_~x~0 82)) (<= 82 main_~x~0))) [2018-12-08 15:49:09,526 INFO L444 ceAbstractionStarter]: At program point L13-2(lines 13 20) the Hoare annotation is: (and (<= main_~y~0 100) (< 99 main_~y~0)) [2018-12-08 15:49:09,526 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-12-08 15:49:09,526 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-12-08 15:49:09,526 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-08 15:49:09,526 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-08 15:49:09,526 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-08 15:49:09,526 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-12-08 15:49:09,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 03:49:09 BoogieIcfgContainer [2018-12-08 15:49:09,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 15:49:09,548 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 15:49:09,548 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 15:49:09,548 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 15:49:09,548 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:48:37" (3/4) ... [2018-12-08 15:49:09,551 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 15:49:09,557 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 15:49:09,557 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 15:49:09,557 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-08 15:49:09,560 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-08 15:49:09,560 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-08 15:49:09,560 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 15:49:09,585 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_61d96608-ea3a-4dce-9212-2c8e9ad912c4/bin-2019/uautomizer/witness.graphml [2018-12-08 15:49:09,585 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 15:49:09,586 INFO L168 Benchmark]: Toolchain (without parser) took 32086.89 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 645.9 MB). Free memory was 961.4 MB in the beginning and 1.4 GB in the end (delta: -398.2 MB). Peak memory consumption was 247.7 MB. Max. memory is 11.5 GB. [2018-12-08 15:49:09,587 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:49:09,587 INFO L168 Benchmark]: CACSL2BoogieTranslator took 116.15 ms. Allocated memory is still 1.0 GB. Free memory was 961.4 MB in the beginning and 950.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 15:49:09,587 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.44 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:49:09,587 INFO L168 Benchmark]: Boogie Preprocessor took 11.57 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:49:09,587 INFO L168 Benchmark]: RCFGBuilder took 142.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -162.9 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2018-12-08 15:49:09,588 INFO L168 Benchmark]: TraceAbstraction took 31764.92 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 512.8 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -246.0 MB). Peak memory consumption was 809.7 MB. Max. memory is 11.5 GB. [2018-12-08 15:49:09,588 INFO L168 Benchmark]: Witness Printer took 37.54 ms. Allocated memory is still 1.7 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:49:09,590 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 116.15 ms. Allocated memory is still 1.0 GB. Free memory was 961.4 MB in the beginning and 950.6 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 11.44 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.57 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 142.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -162.9 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 31764.92 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 512.8 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -246.0 MB). Peak memory consumption was 809.7 MB. Max. memory is 11.5 GB. * Witness Printer took 37.54 ms. Allocated memory is still 1.7 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((x <= 99 && 99 <= y) && y <= 99) && 99 <= x) || (((y <= 92 && 92 <= y) && x <= 92) && 92 <= x)) || (65 <= x && (y <= 65 && 65 <= y) && x <= 65)) || ((y <= 100 && 99 < y) && 100 <= x)) || (64 <= x && (x <= 64 && 64 <= y) && y <= 64)) || (76 <= x && (y <= 76 && x <= 76) && 76 <= y)) || (87 <= x && (x <= 87 && y <= 87) && 87 <= y)) || (((y <= 78 && 78 <= y) && x <= 78) && 78 <= x)) || (72 <= x && (y <= 72 && x <= 72) && 72 <= y)) || (((y <= 69 && 69 <= y) && x <= 69) && 69 <= x)) || (60 <= x && (x <= 60 && y <= 60) && 60 <= y)) || (67 <= x && (y <= 67 && x <= 67) && 67 <= y)) || (((y <= 55 && 55 <= y) && x <= 55) && 55 <= x)) || (((73 <= y && x <= 73) && y <= 73) && 73 <= x)) || (66 <= x && (y <= 66 && 66 <= y) && x <= 66)) || (((x <= 70 && y <= 70) && 70 <= y) && 70 <= x)) || (((x <= 95 && y <= 95) && 95 <= y) && 95 <= x)) || (((90 <= y && y <= 90) && x <= 90) && 90 <= x)) || (((y <= 59 && x <= 59) && 59 <= y) && 59 <= x)) || (85 <= x && (85 <= y && x <= 85) && y <= 85)) || (63 <= x && (y <= 63 && x <= 63) && 63 <= y)) || (((y <= 77 && x <= 77) && 77 <= y) && 77 <= x)) || (53 <= x && (y <= 53 && x <= 53) && 53 <= y)) || (((x <= 79 && y <= 79) && 79 <= y) && 79 <= x)) || (68 <= x && (68 <= y && y <= 68) && x <= 68)) || (51 <= x && (51 <= y && x <= 51) && y <= 51)) || (54 <= x && (x <= 54 && 54 <= y) && y <= 54)) || (((56 <= y && x <= 56) && y <= 56) && 56 <= x)) || (61 <= x && (y <= 61 && 61 <= y) && x <= 61)) || (88 <= x && (x <= 88 && y <= 88) && 88 <= y)) || ((y <= 50 && x <= 50) && 50 <= y)) || (80 <= x && (x <= 80 && 80 <= y) && y <= 80)) || (94 <= x && (x <= 94 && y <= 94) && 94 <= y)) || (89 <= x && (89 <= y && y <= 89) && x <= 89)) || (((86 <= y && x <= 86) && y <= 86) && 86 <= x)) || (58 <= x && (x <= 58 && y <= 58) && 58 <= y)) || (((x <= 91 && 91 <= y) && y <= 91) && 91 <= x)) || (((52 <= y && y <= 52) && x <= 52) && 52 <= x)) || (93 <= x && (x <= 93 && 93 <= y) && y <= 93)) || (74 <= x && (74 <= y && y <= 74) && x <= 74)) || (((y <= 71 && x <= 71) && 71 <= y) && 71 <= x)) || (57 <= x && (57 <= y && x <= 57) && y <= 57)) || (97 <= x && (97 <= y && x <= 97) && y <= 97)) || (((x <= 81 && 81 <= y) && y <= 81) && 81 <= x)) || (84 <= x && (y <= 84 && 84 <= y) && x <= 84)) || (((96 <= y && x <= 96) && y <= 96) && 96 <= x)) || (83 <= x && (y <= 83 && 83 <= y) && x <= 83)) || (62 <= x && (y <= 62 && x <= 62) && 62 <= y)) || (((x <= 98 && y <= 98) && 98 <= y) && 98 <= x)) || (((75 <= y && x <= 75) && y <= 75) && 75 <= x)) || (((82 <= y && y <= 82) && x <= 82) && 82 <= x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 31.7s OverallTime, 52 OverallIterations, 101 TraceHistogramMax, 6.0s AutomataDifference, 0.0s DeadEndRemovalTime, 1.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 665 SDtfs, 732 SDslu, 12576 SDs, 0 SdLazy, 7965 SolverSat, 1933 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7322 GetRequests, 5642 SyntacticMatches, 3 SemanticMatches, 1677 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4800 ImplicationChecksByTransitivity, 19.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=213occurred in iteration=51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 52 MinimizatonAttempts, 2660 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 58 PreInvPairs, 160 NumberOfFragments, 720 HoareAnnotationTreeSize, 58 FomulaSimplifications, 13400 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 7 FomulaSimplificationsInter, 200 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 20.4s InterpolantComputationTime, 12104 NumberOfCodeBlocks, 12030 NumberOfCodeBlocksAsserted, 1489 NumberOfCheckSat, 12003 ConstructedInterpolants, 0 QuantifiedInterpolants, 3964701 SizeOfPredicates, 15 NumberOfNonLiveVariables, 14846 ConjunctsInSsa, 1552 ConjunctsInUnsatCore, 101 InterpolantComputations, 4 PerfectInterpolantSequences, 295786/406427 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...