./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/sum_15x0_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_15x0_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/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 7f140b11074e684b22c263036fee9fde5b4c087a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 08:42:24,062 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 08:42:24,063 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 08:42:24,070 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 08:42:24,070 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 08:42:24,070 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 08:42:24,071 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 08:42:24,073 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 08:42:24,074 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 08:42:24,074 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 08:42:24,075 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 08:42:24,075 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 08:42:24,076 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 08:42:24,076 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 08:42:24,077 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 08:42:24,078 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 08:42:24,078 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 08:42:24,080 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 08:42:24,081 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 08:42:24,082 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 08:42:24,083 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 08:42:24,084 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 08:42:24,085 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 08:42:24,086 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 08:42:24,086 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 08:42:24,086 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 08:42:24,087 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 08:42:24,088 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 08:42:24,088 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 08:42:24,089 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 08:42:24,089 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 08:42:24,090 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 08:42:24,090 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 08:42:24,090 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 08:42:24,091 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 08:42:24,091 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 08:42:24,091 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 08:42:24,101 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 08:42:24,102 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 08:42:24,102 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 08:42:24,102 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 08:42:24,103 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 08:42:24,103 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 08:42:24,103 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 08:42:24,103 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 08:42:24,103 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 08:42:24,104 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 08:42:24,104 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 08:42:24,104 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 08:42:24,104 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 08:42:24,104 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 08:42:24,104 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 08:42:24,104 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 08:42:24,105 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 08:42:24,105 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 08:42:24,105 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 08:42:24,105 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 08:42:24,105 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 08:42:24,105 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 08:42:24,105 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 08:42:24,106 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 08:42:24,106 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 08:42:24,106 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 08:42:24,106 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 08:42:24,106 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 08:42:24,106 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 08:42:24,106 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_2b1ddb85-c009-45f4-8c10-d7ab7380753c/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 -> 7f140b11074e684b22c263036fee9fde5b4c087a [2018-11-10 08:42:24,130 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 08:42:24,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 08:42:24,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 08:42:24,142 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 08:42:24,142 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 08:42:24,142 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_15x0_true-unreach-call_true-termination.c [2018-11-10 08:42:24,178 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/data/e6b7a7570/fcb7339ce2264aee94fd51229396a282/FLAGc01d751ed [2018-11-10 08:42:24,563 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 08:42:24,564 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/sv-benchmarks/c/recursive-simple/sum_15x0_true-unreach-call_true-termination.c [2018-11-10 08:42:24,568 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/data/e6b7a7570/fcb7339ce2264aee94fd51229396a282/FLAGc01d751ed [2018-11-10 08:42:24,576 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/data/e6b7a7570/fcb7339ce2264aee94fd51229396a282 [2018-11-10 08:42:24,578 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 08:42:24,579 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 08:42:24,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 08:42:24,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 08:42:24,582 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 08:42:24,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 08:42:24" (1/1) ... [2018-11-10 08:42:24,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46673125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:42:24, skipping insertion in model container [2018-11-10 08:42:24,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 08:42:24" (1/1) ... [2018-11-10 08:42:24,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 08:42:24,599 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 08:42:24,693 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 08:42:24,695 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 08:42:24,704 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 08:42:24,711 INFO L193 MainTranslator]: Completed translation [2018-11-10 08:42:24,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:42:24 WrapperNode [2018-11-10 08:42:24,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 08:42:24,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 08:42:24,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 08:42:24,712 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 08:42:24,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:42:24" (1/1) ... [2018-11-10 08:42:24,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:42:24" (1/1) ... [2018-11-10 08:42:24,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:42:24" (1/1) ... [2018-11-10 08:42:24,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:42:24" (1/1) ... [2018-11-10 08:42:24,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:42:24" (1/1) ... [2018-11-10 08:42:24,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:42:24" (1/1) ... [2018-11-10 08:42:24,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:42:24" (1/1) ... [2018-11-10 08:42:24,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 08:42:24,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 08:42:24,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 08:42:24,733 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 08:42:24,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:42:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 08:42:24,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 08:42:24,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 08:42:24,808 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-10 08:42:24,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 08:42:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 08:42:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-10 08:42:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 08:42:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 08:42:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 08:42:24,910 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 08:42:24,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 08:42:24 BoogieIcfgContainer [2018-11-10 08:42:24,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 08:42:24,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 08:42:24,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 08:42:24,913 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 08:42:24,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 08:42:24" (1/3) ... [2018-11-10 08:42:24,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56eff776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 08:42:24, skipping insertion in model container [2018-11-10 08:42:24,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 08:42:24" (2/3) ... [2018-11-10 08:42:24,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56eff776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 08:42:24, skipping insertion in model container [2018-11-10 08:42:24,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 08:42:24" (3/3) ... [2018-11-10 08:42:24,915 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_15x0_true-unreach-call_true-termination.c [2018-11-10 08:42:24,921 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 08:42:24,926 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 08:42:24,935 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 08:42:24,955 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 08:42:24,955 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 08:42:24,955 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 08:42:24,955 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 08:42:24,955 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 08:42:24,955 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 08:42:24,955 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 08:42:24,956 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 08:42:24,956 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 08:42:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-10 08:42:24,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 08:42:24,971 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:24,972 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:24,974 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:24,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:24,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-11-10 08:42:24,979 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:24,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:25,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:25,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:42:25,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 08:42:25,113 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 08:42:25,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 08:42:25,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 08:42:25,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 08:42:25,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 08:42:25,130 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-10 08:42:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:25,199 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-10 08:42:25,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 08:42:25,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 08:42:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:25,207 INFO L225 Difference]: With dead ends: 30 [2018-11-10 08:42:25,207 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 08:42:25,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 08:42:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 08:42:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 08:42:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 08:42:25,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-10 08:42:25,234 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-10 08:42:25,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:25,235 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-10 08:42:25,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 08:42:25,235 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-10 08:42:25,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 08:42:25,236 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:25,236 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:25,237 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:25,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:25,237 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-11-10 08:42:25,237 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:25,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:25,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:25,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:42:25,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 08:42:25,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:25,299 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:25,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:42:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:25,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 08:42:25,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:25,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-10 08:42:25,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 08:42:25,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 08:42:25,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-10 08:42:25,387 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-10 08:42:25,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:25,493 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-10 08:42:25,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 08:42:25,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-10 08:42:25,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:25,494 INFO L225 Difference]: With dead ends: 25 [2018-11-10 08:42:25,494 INFO L226 Difference]: Without dead ends: 21 [2018-11-10 08:42:25,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-10 08:42:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-10 08:42:25,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-10 08:42:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 08:42:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-10 08:42:25,498 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-10 08:42:25,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:25,498 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-10 08:42:25,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 08:42:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-10 08:42:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 08:42:25,499 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:25,499 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:25,500 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:25,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:25,500 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-11-10 08:42:25,500 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:25,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:25,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:25,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:42:25,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 08:42:25,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:25,571 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:25,580 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 08:42:25,591 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 08:42:25,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:42:25,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 08:42:25,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:25,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-10 08:42:25,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 08:42:25,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 08:42:25,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-10 08:42:25,621 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-10 08:42:25,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:25,661 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-10 08:42:25,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 08:42:25,661 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-10 08:42:25,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:25,662 INFO L225 Difference]: With dead ends: 28 [2018-11-10 08:42:25,662 INFO L226 Difference]: Without dead ends: 24 [2018-11-10 08:42:25,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-10 08:42:25,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-10 08:42:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-10 08:42:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 08:42:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-10 08:42:25,667 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-10 08:42:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:25,667 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-10 08:42:25,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 08:42:25,667 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-10 08:42:25,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-10 08:42:25,668 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:25,668 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:25,668 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:25,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:25,668 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2018-11-10 08:42:25,668 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:25,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:25,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:25,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:42:25,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 08:42:25,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:25,755 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:25,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 08:42:25,782 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 08:42:25,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:42:25,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 08:42:25,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:25,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-10 08:42:25,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 08:42:25,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 08:42:25,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-10 08:42:25,814 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-10 08:42:25,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:25,872 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-10 08:42:25,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 08:42:25,872 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-10 08:42:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:25,873 INFO L225 Difference]: With dead ends: 31 [2018-11-10 08:42:25,873 INFO L226 Difference]: Without dead ends: 27 [2018-11-10 08:42:25,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-10 08:42:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-10 08:42:25,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-10 08:42:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-10 08:42:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-10 08:42:25,878 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-10 08:42:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:25,878 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-10 08:42:25,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 08:42:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-10 08:42:25,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-10 08:42:25,879 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:25,879 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:25,880 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:25,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:25,880 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2018-11-10 08:42:25,880 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:25,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:25,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:25,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:42:25,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 08:42:25,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:25,956 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:25,965 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 08:42:25,978 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 08:42:25,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:42:25,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 08:42:26,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:26,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-10 08:42:26,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 08:42:26,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 08:42:26,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-10 08:42:26,020 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-10 08:42:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:26,085 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-10 08:42:26,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 08:42:26,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-10 08:42:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:26,086 INFO L225 Difference]: With dead ends: 34 [2018-11-10 08:42:26,086 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 08:42:26,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-10 08:42:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 08:42:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-10 08:42:26,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 08:42:26,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-10 08:42:26,092 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-10 08:42:26,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:26,092 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-10 08:42:26,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 08:42:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-10 08:42:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-10 08:42:26,093 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:26,093 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:26,093 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:26,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:26,094 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2018-11-10 08:42:26,094 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:26,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:26,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:26,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:42:26,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 08:42:26,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:26,169 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:26,184 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 08:42:26,203 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-10 08:42:26,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:42:26,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 08:42:26,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:26,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-10 08:42:26,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 08:42:26,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 08:42:26,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-10 08:42:26,239 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-10 08:42:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:26,338 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-10 08:42:26,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 08:42:26,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-10 08:42:26,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:26,339 INFO L225 Difference]: With dead ends: 37 [2018-11-10 08:42:26,339 INFO L226 Difference]: Without dead ends: 33 [2018-11-10 08:42:26,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-10 08:42:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-10 08:42:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-10 08:42:26,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 08:42:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-10 08:42:26,344 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-10 08:42:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:26,344 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-10 08:42:26,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 08:42:26,345 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-10 08:42:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 08:42:26,346 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:26,346 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:26,346 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:26,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:26,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2018-11-10 08:42:26,346 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:26,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:26,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:26,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:42:26,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 08:42:26,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:26,434 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:26,439 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 08:42:26,459 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-10 08:42:26,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:42:26,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 08:42:26,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:26,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 08:42:26,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 08:42:26,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 08:42:26,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-10 08:42:26,491 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-10 08:42:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:26,568 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-10 08:42:26,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 08:42:26,575 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-10 08:42:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:26,576 INFO L225 Difference]: With dead ends: 40 [2018-11-10 08:42:26,576 INFO L226 Difference]: Without dead ends: 36 [2018-11-10 08:42:26,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-10 08:42:26,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-10 08:42:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-10 08:42:26,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-10 08:42:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-10 08:42:26,581 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-10 08:42:26,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:26,581 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-10 08:42:26,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 08:42:26,581 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-10 08:42:26,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-10 08:42:26,582 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:26,582 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:26,582 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:26,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:26,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2018-11-10 08:42:26,583 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:26,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:26,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:26,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:42:26,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 08:42:26,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:26,663 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:26,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:42:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:26,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 08:42:26,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:26,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-10 08:42:26,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 08:42:26,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 08:42:26,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-10 08:42:26,727 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-10 08:42:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:26,850 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-10 08:42:26,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 08:42:26,850 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-10 08:42:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:26,851 INFO L225 Difference]: With dead ends: 43 [2018-11-10 08:42:26,851 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 08:42:26,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-10 08:42:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 08:42:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-10 08:42:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 08:42:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-10 08:42:26,856 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-10 08:42:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:26,857 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-10 08:42:26,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 08:42:26,857 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-10 08:42:26,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 08:42:26,858 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:26,858 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:26,858 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:26,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:26,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2018-11-10 08:42:26,859 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:26,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:26,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:26,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:42:26,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 08:42:26,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:26,953 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:26,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 08:42:26,996 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 08:42:26,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:42:26,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 08:42:27,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:27,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-10 08:42:27,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 08:42:27,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 08:42:27,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-10 08:42:27,047 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-10 08:42:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:27,133 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-10 08:42:27,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 08:42:27,134 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-10 08:42:27,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:27,134 INFO L225 Difference]: With dead ends: 46 [2018-11-10 08:42:27,134 INFO L226 Difference]: Without dead ends: 42 [2018-11-10 08:42:27,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-10 08:42:27,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-10 08:42:27,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-10 08:42:27,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-10 08:42:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-10 08:42:27,138 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-10 08:42:27,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:27,138 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-10 08:42:27,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 08:42:27,139 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-10 08:42:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-10 08:42:27,139 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:27,139 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:27,140 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:27,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:27,140 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2018-11-10 08:42:27,140 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:27,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:27,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:27,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:42:27,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 08:42:27,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:27,239 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:27,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 08:42:27,264 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-10 08:42:27,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:42:27,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 08:42:27,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:27,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-10 08:42:27,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 08:42:27,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 08:42:27,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-10 08:42:27,299 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-10 08:42:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:27,394 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-10 08:42:27,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-10 08:42:27,394 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-10 08:42:27,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:27,395 INFO L225 Difference]: With dead ends: 49 [2018-11-10 08:42:27,395 INFO L226 Difference]: Without dead ends: 45 [2018-11-10 08:42:27,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-10 08:42:27,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-10 08:42:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-10 08:42:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 08:42:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-10 08:42:27,399 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-10 08:42:27,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:27,399 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-10 08:42:27,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 08:42:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-10 08:42:27,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 08:42:27,400 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:27,400 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:27,400 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:27,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:27,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2018-11-10 08:42:27,400 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:27,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:27,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:27,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:42:27,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 08:42:27,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:27,496 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:27,505 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 08:42:27,528 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 08:42:27,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:42:27,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 08:42:27,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:27,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-10 08:42:27,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 08:42:27,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 08:42:27,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-10 08:42:27,580 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-10 08:42:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:27,695 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-10 08:42:27,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 08:42:27,695 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-10 08:42:27,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:27,696 INFO L225 Difference]: With dead ends: 52 [2018-11-10 08:42:27,696 INFO L226 Difference]: Without dead ends: 48 [2018-11-10 08:42:27,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-11-10 08:42:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-10 08:42:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-10 08:42:27,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-10 08:42:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-10 08:42:27,700 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-10 08:42:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:27,701 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-10 08:42:27,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 08:42:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-10 08:42:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-10 08:42:27,701 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:27,702 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:27,702 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:27,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:27,702 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2018-11-10 08:42:27,702 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:27,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:27,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:27,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:42:27,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-10 08:42:27,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:27,840 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:27,848 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 08:42:27,880 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-10 08:42:27,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:42:27,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-10 08:42:27,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:27,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-10 08:42:27,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 08:42:27,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 08:42:27,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-10 08:42:27,948 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-10 08:42:28,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:28,078 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-10 08:42:28,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 08:42:28,079 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-10 08:42:28,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:28,079 INFO L225 Difference]: With dead ends: 55 [2018-11-10 08:42:28,080 INFO L226 Difference]: Without dead ends: 51 [2018-11-10 08:42:28,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-10 08:42:28,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-10 08:42:28,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-10 08:42:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-10 08:42:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-10 08:42:28,083 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-10 08:42:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:28,083 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-10 08:42:28,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 08:42:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-10 08:42:28,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-10 08:42:28,085 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:28,085 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:28,085 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:28,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:28,085 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2018-11-10 08:42:28,085 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:28,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:28,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:28,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:42:28,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-10 08:42:28,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:28,222 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:28,233 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 08:42:28,266 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-10 08:42:28,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:42:28,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-10 08:42:28,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:28,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-10 08:42:28,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 08:42:28,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 08:42:28,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-10 08:42:28,323 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-10 08:42:28,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:28,470 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-10 08:42:28,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 08:42:28,470 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-10 08:42:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:28,471 INFO L225 Difference]: With dead ends: 58 [2018-11-10 08:42:28,471 INFO L226 Difference]: Without dead ends: 54 [2018-11-10 08:42:28,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-10 08:42:28,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-10 08:42:28,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-10 08:42:28,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-10 08:42:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-10 08:42:28,477 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-10 08:42:28,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:28,477 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-10 08:42:28,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 08:42:28,477 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-10 08:42:28,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-10 08:42:28,478 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:28,478 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:28,479 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:28,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:28,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2018-11-10 08:42:28,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:28,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:28,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:28,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:42:28,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-10 08:42:28,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:28,619 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:28,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:42:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:28,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-10 08:42:28,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:28,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-10 08:42:28,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 08:42:28,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 08:42:28,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-10 08:42:28,679 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-10 08:42:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:28,817 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-10 08:42:28,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 08:42:28,818 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-10 08:42:28,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:28,818 INFO L225 Difference]: With dead ends: 61 [2018-11-10 08:42:28,818 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 08:42:28,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-10 08:42:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 08:42:28,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-10 08:42:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-10 08:42:28,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-10 08:42:28,823 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-10 08:42:28,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:28,823 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-10 08:42:28,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 08:42:28,823 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-10 08:42:28,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-10 08:42:28,824 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:28,824 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:28,824 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:28,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:28,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2018-11-10 08:42:28,825 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:28,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:28,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:28,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 08:42:28,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 08:42:28,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:28,959 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:28,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 08:42:28,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 08:42:28,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:42:28,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 08:42:29,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:29,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-10 08:42:29,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 08:42:29,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 08:42:29,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-10 08:42:29,037 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-10 08:42:29,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:29,203 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-10 08:42:29,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 08:42:29,204 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-10 08:42:29,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:29,204 INFO L225 Difference]: With dead ends: 64 [2018-11-10 08:42:29,205 INFO L226 Difference]: Without dead ends: 60 [2018-11-10 08:42:29,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-11-10 08:42:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-10 08:42:29,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-10 08:42:29,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-10 08:42:29,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-10 08:42:29,209 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-10 08:42:29,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:29,209 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-10 08:42:29,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 08:42:29,209 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-10 08:42:29,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-10 08:42:29,210 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:29,210 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:29,210 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:29,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:29,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2018-11-10 08:42:29,211 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:29,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:29,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:29,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:42:29,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 374 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2018-11-10 08:42:29,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:29,893 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:29,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 08:42:29,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-10 08:42:29,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:42:29,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2018-11-10 08:42:30,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:30,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 43 [2018-11-10 08:42:30,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-10 08:42:30,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-10 08:42:30,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1715, Unknown=0, NotChecked=0, Total=1806 [2018-11-10 08:42:30,202 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 43 states. [2018-11-10 08:42:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:31,498 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-10 08:42:31,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-10 08:42:31,499 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 103 [2018-11-10 08:42:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:31,499 INFO L225 Difference]: With dead ends: 67 [2018-11-10 08:42:31,499 INFO L226 Difference]: Without dead ends: 63 [2018-11-10 08:42:31,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 98 SyntacticMatches, 16 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=374, Invalid=5176, Unknown=0, NotChecked=0, Total=5550 [2018-11-10 08:42:31,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-10 08:42:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-10 08:42:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-10 08:42:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-10 08:42:31,503 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-10 08:42:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:31,504 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-10 08:42:31,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-10 08:42:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-10 08:42:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-10 08:42:31,504 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 08:42:31,505 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 08:42:31,505 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 08:42:31,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 08:42:31,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2018-11-10 08:42:31,505 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 08:42:31,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 08:42:31,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:31,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 08:42:31,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 08:42:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 08:42:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 31 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-10 08:42:31,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 08:42:31,669 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 08:42:31,676 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 08:42:31,704 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 08:42:31,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 08:42:31,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 08:42:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 31 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2018-11-10 08:42:31,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 08:42:31,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-10 08:42:31,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-10 08:42:31,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-10 08:42:31,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-11-10 08:42:31,752 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 20 states. [2018-11-10 08:42:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 08:42:31,883 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-11-10 08:42:31,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-10 08:42:31,883 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2018-11-10 08:42:31,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 08:42:31,884 INFO L225 Difference]: With dead ends: 63 [2018-11-10 08:42:31,884 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 08:42:31,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-11-10 08:42:31,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 08:42:31,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 08:42:31,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 08:42:31,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 08:42:31,885 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2018-11-10 08:42:31,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 08:42:31,886 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 08:42:31,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-10 08:42:31,886 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 08:42:31,886 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 08:42:31,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 08:42:31,914 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-10 08:42:31,914 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 08:42:31,914 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 08:42:31,914 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 08:42:31,914 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 08:42:31,915 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 08:42:31,915 INFO L425 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-11-10 08:42:31,915 INFO L421 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (<= |sum_#in~m| sum_~m) (<= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= |sum_#in~n| sum_~n)) [2018-11-10 08:42:31,915 INFO L425 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-11-10 08:42:31,915 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-11-10 08:42:31,915 INFO L425 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-11-10 08:42:31,915 INFO L428 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-11-10 08:42:31,915 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2018-11-10 08:42:31,915 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2018-11-10 08:42:31,915 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-11-10 08:42:31,915 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-11-10 08:42:31,915 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-11-10 08:42:31,915 INFO L421 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= main_~a~0 15) (<= 15 main_~a~0)) [2018-11-10 08:42:31,916 INFO L425 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-11-10 08:42:31,916 INFO L425 ceAbstractionStarter]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2018-11-10 08:42:31,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 08:42:31 BoogieIcfgContainer [2018-11-10 08:42:31,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 08:42:31,918 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 08:42:31,918 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 08:42:31,918 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 08:42:31,919 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 08:42:24" (3/4) ... [2018-11-10 08:42:31,922 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 08:42:31,927 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 08:42:31,927 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-11-10 08:42:31,927 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 08:42:31,930 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-10 08:42:31,930 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-10 08:42:31,930 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-10 08:42:31,958 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_2b1ddb85-c009-45f4-8c10-d7ab7380753c/bin-2019/uautomizer/witness.graphml [2018-11-10 08:42:31,959 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 08:42:31,959 INFO L168 Benchmark]: Toolchain (without parser) took 7380.64 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 370.7 MB). Free memory was 953.8 MB in the beginning and 1.3 GB in the end (delta: -346.5 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2018-11-10 08:42:31,960 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 08:42:31,961 INFO L168 Benchmark]: CACSL2BoogieTranslator took 131.89 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 942.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-10 08:42:31,961 INFO L168 Benchmark]: Boogie Preprocessor took 20.41 ms. Allocated memory is still 1.0 GB. Free memory is still 942.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 08:42:31,961 INFO L168 Benchmark]: RCFGBuilder took 177.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 942.9 MB in the beginning and 1.1 GB in the end (delta: -186.2 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2018-11-10 08:42:31,962 INFO L168 Benchmark]: TraceAbstraction took 7007.06 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 230.7 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -181.0 MB). Peak memory consumption was 49.7 MB. Max. memory is 11.5 GB. [2018-11-10 08:42:31,962 INFO L168 Benchmark]: Witness Printer took 40.54 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2018-11-10 08:42:31,964 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 131.89 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 942.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.41 ms. Allocated memory is still 1.0 GB. Free memory is still 942.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 177.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 942.9 MB in the beginning and 1.1 GB in the end (delta: -186.2 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7007.06 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 230.7 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -181.0 MB). Peak memory consumption was 49.7 MB. Max. memory is 11.5 GB. * Witness Printer took 40.54 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 6.9s OverallTime, 17 OverallIterations, 17 TraceHistogramMax, 2.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 249 SDtfs, 397 SDslu, 2031 SDs, 0 SdLazy, 2378 SolverSat, 148 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1565 GetRequests, 1172 SyntacticMatches, 16 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 28 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 2061 NumberOfCodeBlocks, 2061 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 2028 ConstructedInterpolants, 0 QuantifiedInterpolants, 487248 SizeOfPredicates, 171 NumberOfNonLiveVariables, 3024 ConjunctsInSsa, 437 ConjunctsInUnsatCore, 33 InterpolantComputations, 1 PerfectInterpolantSequences, 5317/9248 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...