./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0_false-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_9c4168c9-74fd-49a5-8b49-3db92396820c/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 17db2a72807ac377d533a347dbb668103ea580a0 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 06:56:40,045 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 06:56:40,047 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 06:56:40,057 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 06:56:40,058 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 06:56:40,058 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 06:56:40,060 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 06:56:40,061 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 06:56:40,063 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 06:56:40,063 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 06:56:40,064 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 06:56:40,065 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 06:56:40,065 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 06:56:40,066 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 06:56:40,067 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 06:56:40,068 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 06:56:40,069 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 06:56:40,071 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 06:56:40,072 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 06:56:40,074 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 06:56:40,075 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 06:56:40,076 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 06:56:40,078 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 06:56:40,078 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 06:56:40,078 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 06:56:40,079 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 06:56:40,080 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 06:56:40,081 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 06:56:40,082 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 06:56:40,083 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 06:56:40,083 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 06:56:40,084 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 06:56:40,084 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 06:56:40,084 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 06:56:40,085 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 06:56:40,086 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 06:56:40,086 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 06:56:40,099 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 06:56:40,099 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 06:56:40,100 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 06:56:40,100 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 06:56:40,101 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 06:56:40,101 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 06:56:40,101 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 06:56:40,102 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 06:56:40,102 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 06:56:40,102 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 06:56:40,102 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 06:56:40,102 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 06:56:40,103 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 06:56:40,103 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 06:56:40,103 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 06:56:40,103 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 06:56:40,103 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 06:56:40,104 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 06:56:40,104 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 06:56:40,104 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 06:56:40,104 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 06:56:40,105 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 06:56:40,105 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 06:56:40,105 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 06:56:40,105 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 06:56:40,105 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 06:56:40,105 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 06:56:40,106 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 06:56:40,106 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 06:56:40,106 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_9c4168c9-74fd-49a5-8b49-3db92396820c/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 -> 17db2a72807ac377d533a347dbb668103ea580a0 [2018-11-10 06:56:40,136 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 06:56:40,148 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 06:56:40,151 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 06:56:40,153 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 06:56:40,153 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 06:56:40,154 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_20x0_false-unreach-call_true-termination.c [2018-11-10 06:56:40,213 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/bin-2019/uautomizer/data/4d8328e4c/9bc8193f43cd447897a16e1b7cc9e500/FLAG868cccdac [2018-11-10 06:56:40,566 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 06:56:40,566 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/sv-benchmarks/c/recursive-simple/sum_20x0_false-unreach-call_true-termination.c [2018-11-10 06:56:40,572 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/bin-2019/uautomizer/data/4d8328e4c/9bc8193f43cd447897a16e1b7cc9e500/FLAG868cccdac [2018-11-10 06:56:40,586 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/bin-2019/uautomizer/data/4d8328e4c/9bc8193f43cd447897a16e1b7cc9e500 [2018-11-10 06:56:40,589 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 06:56:40,590 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 06:56:40,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 06:56:40,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 06:56:40,594 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 06:56:40,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:56:40" (1/1) ... [2018-11-10 06:56:40,597 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 06:56:40, skipping insertion in model container [2018-11-10 06:56:40,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:56:40" (1/1) ... [2018-11-10 06:56:40,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 06:56:40,619 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 06:56:40,745 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:56:40,748 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 06:56:40,760 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:56:40,771 INFO L193 MainTranslator]: Completed translation [2018-11-10 06:56:40,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:56:40 WrapperNode [2018-11-10 06:56:40,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 06:56:40,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 06:56:40,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 06:56:40,772 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 06:56:40,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:56:40" (1/1) ... [2018-11-10 06:56:40,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:56:40" (1/1) ... [2018-11-10 06:56:40,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:56:40" (1/1) ... [2018-11-10 06:56:40,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:56:40" (1/1) ... [2018-11-10 06:56:40,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:56:40" (1/1) ... [2018-11-10 06:56:40,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:56:40" (1/1) ... [2018-11-10 06:56:40,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:56:40" (1/1) ... [2018-11-10 06:56:40,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 06:56:40,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 06:56:40,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 06:56:40,793 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 06:56:40,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:56:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:40,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 06:56:40,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 06:56:40,878 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-10 06:56:40,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 06:56:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 06:56:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-10 06:56:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 06:56:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 06:56:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 06:56:40,990 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 06:56:40,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:56:40 BoogieIcfgContainer [2018-11-10 06:56:40,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 06:56:40,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 06:56:40,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 06:56:40,994 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 06:56:40,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:56:40" (1/3) ... [2018-11-10 06:56:40,995 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 06:56:40, skipping insertion in model container [2018-11-10 06:56:40,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:56:40" (2/3) ... [2018-11-10 06:56:40,996 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 06:56:40, skipping insertion in model container [2018-11-10 06:56:40,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:56:40" (3/3) ... [2018-11-10 06:56:40,998 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_20x0_false-unreach-call_true-termination.c [2018-11-10 06:56:41,006 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 06:56:41,012 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 06:56:41,022 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 06:56:41,044 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 06:56:41,045 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 06:56:41,045 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 06:56:41,045 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 06:56:41,045 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 06:56:41,045 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 06:56:41,045 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 06:56:41,046 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 06:56:41,046 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 06:56:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-10 06:56:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 06:56:41,063 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:41,063 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:56:41,065 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:41,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:41,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-11-10 06:56:41,071 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:41,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:41,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:41,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:56:41,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:41,207 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 06:56:41,209 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:56:41,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 06:56:41,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 06:56:41,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 06:56:41,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 06:56:41,226 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-10 06:56:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:41,326 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-10 06:56:41,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 06:56:41,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 06:56:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:41,335 INFO L225 Difference]: With dead ends: 30 [2018-11-10 06:56:41,335 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 06:56:41,338 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 06:56:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 06:56:41,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 06:56:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 06:56:41,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-10 06:56:41,372 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-10 06:56:41,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:41,372 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-10 06:56:41,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 06:56:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-10 06:56:41,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 06:56:41,374 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:41,375 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 06:56:41,375 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:41,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:41,375 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-11-10 06:56:41,376 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:41,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:41,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:41,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:56:41,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:41,462 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 06:56:41,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:41,462 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:41,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:56:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:41,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:41,527 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 06:56:41,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:41,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-10 06:56:41,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:56:41,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:56:41,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:56:41,549 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-10 06:56:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:41,618 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-10 06:56:41,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 06:56:41,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-10 06:56:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:41,619 INFO L225 Difference]: With dead ends: 25 [2018-11-10 06:56:41,620 INFO L226 Difference]: Without dead ends: 21 [2018-11-10 06:56:41,620 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 06:56:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-10 06:56:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-10 06:56:41,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 06:56:41,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-10 06:56:41,626 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-10 06:56:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:41,626 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-10 06:56:41,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:56:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-10 06:56:41,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 06:56:41,628 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:41,628 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 06:56:41,628 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:41,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:41,628 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-11-10 06:56:41,629 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:41,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:41,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:41,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:56:41,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:41,736 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 06:56:41,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:41,736 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:41,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 06:56:41,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 06:56:41,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:41,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:41,798 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 06:56:41,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:41,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-10 06:56:41,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 06:56:41,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 06:56:41,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-10 06:56:41,820 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-10 06:56:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:41,894 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-10 06:56:41,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 06:56:41,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-10 06:56:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:41,895 INFO L225 Difference]: With dead ends: 28 [2018-11-10 06:56:41,895 INFO L226 Difference]: Without dead ends: 24 [2018-11-10 06:56:41,896 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 06:56:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-10 06:56:41,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-10 06:56:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 06:56:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-10 06:56:41,903 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-10 06:56:41,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:41,903 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-10 06:56:41,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 06:56:41,903 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-10 06:56:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-10 06:56:41,904 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:41,904 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 06:56:41,905 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:41,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:41,905 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2018-11-10 06:56:41,905 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:41,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:41,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:41,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:41,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:42,002 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 06:56:42,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:42,002 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:42,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 06:56:42,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 06:56:42,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:42,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:42,059 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 06:56:42,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:42,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-10 06:56:42,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 06:56:42,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 06:56:42,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-10 06:56:42,086 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-10 06:56:42,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:42,163 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-10 06:56:42,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 06:56:42,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-10 06:56:42,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:42,164 INFO L225 Difference]: With dead ends: 31 [2018-11-10 06:56:42,164 INFO L226 Difference]: Without dead ends: 27 [2018-11-10 06:56:42,165 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 06:56:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-10 06:56:42,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-10 06:56:42,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-10 06:56:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-10 06:56:42,170 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-10 06:56:42,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:42,170 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-10 06:56:42,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 06:56:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-10 06:56:42,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-10 06:56:42,171 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:42,172 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 06:56:42,172 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:42,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:42,172 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2018-11-10 06:56:42,173 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:42,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:42,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:42,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:42,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:42,267 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 06:56:42,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:42,267 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:42,278 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 06:56:42,297 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 06:56:42,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:42,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:42,323 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 06:56:42,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:42,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-10 06:56:42,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 06:56:42,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 06:56:42,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-10 06:56:42,357 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-10 06:56:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:42,438 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-10 06:56:42,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 06:56:42,439 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-10 06:56:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:42,440 INFO L225 Difference]: With dead ends: 34 [2018-11-10 06:56:42,440 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 06:56:42,441 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 06:56:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 06:56:42,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-10 06:56:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 06:56:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-10 06:56:42,447 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-10 06:56:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:42,447 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-10 06:56:42,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 06:56:42,448 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-10 06:56:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-10 06:56:42,448 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:42,449 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 06:56:42,449 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:42,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:42,449 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2018-11-10 06:56:42,449 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:42,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:42,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:42,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:42,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:42,580 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 06:56:42,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:42,580 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:42,596 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 06:56:42,626 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-10 06:56:42,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:42,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:42,649 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 06:56:42,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:42,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-10 06:56:42,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 06:56:42,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 06:56:42,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-10 06:56:42,675 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-10 06:56:42,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:42,791 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-10 06:56:42,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 06:56:42,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-10 06:56:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:42,793 INFO L225 Difference]: With dead ends: 37 [2018-11-10 06:56:42,793 INFO L226 Difference]: Without dead ends: 33 [2018-11-10 06:56:42,793 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 06:56:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-10 06:56:42,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-10 06:56:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 06:56:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-10 06:56:42,797 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-10 06:56:42,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:42,798 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-10 06:56:42,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 06:56:42,798 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-10 06:56:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 06:56:42,799 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:42,799 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 06:56:42,799 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:42,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:42,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2018-11-10 06:56:42,800 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:42,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:42,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:42,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:42,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:42,919 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 06:56:42,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:42,920 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:42,927 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 06:56:42,955 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-10 06:56:42,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:42,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:42,979 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 06:56:43,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:43,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-10 06:56:43,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 06:56:43,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 06:56:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-10 06:56:43,002 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-10 06:56:43,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:43,096 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-10 06:56:43,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 06:56:43,096 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-10 06:56:43,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:43,097 INFO L225 Difference]: With dead ends: 40 [2018-11-10 06:56:43,097 INFO L226 Difference]: Without dead ends: 36 [2018-11-10 06:56:43,098 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 06:56:43,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-10 06:56:43,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-10 06:56:43,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-10 06:56:43,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-10 06:56:43,104 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-10 06:56:43,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:43,104 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-10 06:56:43,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 06:56:43,105 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-10 06:56:43,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-10 06:56:43,106 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:43,106 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 06:56:43,106 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:43,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:43,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2018-11-10 06:56:43,107 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:43,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:43,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:43,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:43,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:43,224 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 06:56:43,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:43,224 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:43,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:56:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:43,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:43,271 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 06:56:43,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:43,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-10 06:56:43,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 06:56:43,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 06:56:43,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-10 06:56:43,294 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-10 06:56:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:43,420 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-10 06:56:43,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 06:56:43,421 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-10 06:56:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:43,422 INFO L225 Difference]: With dead ends: 43 [2018-11-10 06:56:43,422 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 06:56:43,423 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 06:56:43,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 06:56:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-10 06:56:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 06:56:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-10 06:56:43,429 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-10 06:56:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:43,429 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-10 06:56:43,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 06:56:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-10 06:56:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 06:56:43,431 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:43,431 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 06:56:43,431 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:43,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:43,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2018-11-10 06:56:43,432 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:43,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:43,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:43,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:56:43,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:43,600 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 06:56:43,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:43,601 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:43,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 06:56:43,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 06:56:43,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:43,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:43,660 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 06:56:43,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:43,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-10 06:56:43,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 06:56:43,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 06:56:43,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-10 06:56:43,695 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-10 06:56:43,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:43,799 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-10 06:56:43,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 06:56:43,799 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-10 06:56:43,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:43,800 INFO L225 Difference]: With dead ends: 46 [2018-11-10 06:56:43,800 INFO L226 Difference]: Without dead ends: 42 [2018-11-10 06:56:43,800 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 06:56:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-10 06:56:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-10 06:56:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-10 06:56:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-10 06:56:43,804 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-10 06:56:43,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:43,805 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-10 06:56:43,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 06:56:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-10 06:56:43,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-10 06:56:43,806 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:43,806 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 06:56:43,806 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:43,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:43,807 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2018-11-10 06:56:43,807 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:43,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:43,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:43,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:43,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:43,928 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 06:56:43,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:43,928 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:43,939 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 06:56:43,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-10 06:56:43,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:43,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:43,999 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 06:56:44,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:44,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-10 06:56:44,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 06:56:44,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 06:56:44,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-10 06:56:44,022 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-10 06:56:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:44,153 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-10 06:56:44,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-10 06:56:44,154 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-10 06:56:44,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:44,154 INFO L225 Difference]: With dead ends: 49 [2018-11-10 06:56:44,155 INFO L226 Difference]: Without dead ends: 45 [2018-11-10 06:56:44,155 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 06:56:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-10 06:56:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-10 06:56:44,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 06:56:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-10 06:56:44,164 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-10 06:56:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:44,164 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-10 06:56:44,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 06:56:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-10 06:56:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 06:56:44,166 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:44,166 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 06:56:44,166 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:44,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:44,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2018-11-10 06:56:44,166 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:44,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:44,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:44,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:44,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:44,290 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 06:56:44,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:44,290 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:44,303 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 06:56:44,326 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 06:56:44,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:44,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:44,371 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 06:56:44,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:44,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-10 06:56:44,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 06:56:44,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 06:56:44,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-11-10 06:56:44,394 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-10 06:56:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:44,568 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-10 06:56:44,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 06:56:44,569 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-10 06:56:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:44,570 INFO L225 Difference]: With dead ends: 52 [2018-11-10 06:56:44,570 INFO L226 Difference]: Without dead ends: 48 [2018-11-10 06:56:44,570 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 06:56:44,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-10 06:56:44,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-10 06:56:44,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-10 06:56:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-10 06:56:44,580 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-10 06:56:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:44,580 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-10 06:56:44,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 06:56:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-10 06:56:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-10 06:56:44,583 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:44,584 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 06:56:44,584 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:44,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:44,584 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2018-11-10 06:56:44,584 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:44,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:44,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:44,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:44,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:44,773 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 06:56:44,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:44,774 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:44,783 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 06:56:44,826 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-10 06:56:44,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:44,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:44,867 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 06:56:44,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:44,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-10 06:56:44,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 06:56:44,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 06:56:44,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-10 06:56:44,909 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-10 06:56:45,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:45,091 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-10 06:56:45,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 06:56:45,092 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-10 06:56:45,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:45,092 INFO L225 Difference]: With dead ends: 55 [2018-11-10 06:56:45,092 INFO L226 Difference]: Without dead ends: 51 [2018-11-10 06:56:45,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-10 06:56:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-10 06:56:45,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-10 06:56:45,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-10 06:56:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-10 06:56:45,098 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-10 06:56:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:45,099 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-10 06:56:45,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 06:56:45,099 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-10 06:56:45,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-10 06:56:45,100 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:45,100 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 06:56:45,100 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:45,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:45,101 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2018-11-10 06:56:45,101 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:45,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:45,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:45,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:45,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:45,469 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 06:56:45,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:45,469 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:45,477 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 06:56:45,513 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-10 06:56:45,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:45,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:45,552 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 06:56:45,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:45,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-10 06:56:45,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 06:56:45,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 06:56:45,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-10 06:56:45,575 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-10 06:56:45,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:45,793 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-10 06:56:45,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 06:56:45,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-10 06:56:45,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:45,794 INFO L225 Difference]: With dead ends: 58 [2018-11-10 06:56:45,794 INFO L226 Difference]: Without dead ends: 54 [2018-11-10 06:56:45,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-10 06:56:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-10 06:56:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-10 06:56:45,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-10 06:56:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-10 06:56:45,798 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-10 06:56:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:45,799 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-10 06:56:45,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 06:56:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-10 06:56:45,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-10 06:56:45,799 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:45,800 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 06:56:45,800 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:45,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:45,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2018-11-10 06:56:45,800 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:45,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:45,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:45,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:45,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:45,925 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 06:56:45,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:45,926 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:45,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:56:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:45,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:45,983 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 06:56:46,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:46,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-10 06:56:46,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 06:56:46,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 06:56:46,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-10 06:56:46,015 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-10 06:56:46,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:46,204 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-10 06:56:46,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 06:56:46,204 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-10 06:56:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:46,205 INFO L225 Difference]: With dead ends: 61 [2018-11-10 06:56:46,205 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 06:56:46,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-10 06:56:46,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 06:56:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-10 06:56:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-10 06:56:46,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-10 06:56:46,210 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-10 06:56:46,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:46,211 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-10 06:56:46,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 06:56:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-10 06:56:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-10 06:56:46,212 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:46,212 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 06:56:46,212 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:46,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2018-11-10 06:56:46,213 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:46,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:46,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:46,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:56:46,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:46,403 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 06:56:46,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:46,404 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:46,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 06:56:46,438 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 06:56:46,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:46,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:46,468 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 06:56:46,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:46,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-10 06:56:46,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 06:56:46,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 06:56:46,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-11-10 06:56:46,500 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-10 06:56:46,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:46,689 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-10 06:56:46,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 06:56:46,689 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-10 06:56:46,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:46,690 INFO L225 Difference]: With dead ends: 64 [2018-11-10 06:56:46,690 INFO L226 Difference]: Without dead ends: 60 [2018-11-10 06:56:46,690 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 06:56:46,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-10 06:56:46,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-10 06:56:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-10 06:56:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-10 06:56:46,694 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-10 06:56:46,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:46,694 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-10 06:56:46,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 06:56:46,694 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-10 06:56:46,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-10 06:56:46,695 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:46,696 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 06:56:46,696 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:46,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:46,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2018-11-10 06:56:46,696 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:46,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:46,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:46,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:46,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-10 06:56:46,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:46,883 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:46,890 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 06:56:46,924 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-10 06:56:46,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:46,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-10 06:56:46,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:46,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-10 06:56:46,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-10 06:56:46,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-10 06:56:46,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-11-10 06:56:46,969 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2018-11-10 06:56:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:47,202 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-10 06:56:47,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-10 06:56:47,202 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2018-11-10 06:56:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:47,203 INFO L225 Difference]: With dead ends: 67 [2018-11-10 06:56:47,203 INFO L226 Difference]: Without dead ends: 63 [2018-11-10 06:56:47,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-11-10 06:56:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-10 06:56:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-10 06:56:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-10 06:56:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-10 06:56:47,208 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2018-11-10 06:56:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:47,208 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-10 06:56:47,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-10 06:56:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-10 06:56:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-10 06:56:47,209 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:47,209 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 06:56:47,210 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:47,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:47,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2018-11-10 06:56:47,210 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:47,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:47,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:47,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:47,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-10 06:56:47,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:47,405 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/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 06:56:47,411 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 06:56:47,442 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 06:56:47,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:47,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-11-10 06:56:47,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:47,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-10 06:56:47,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-10 06:56:47,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-10 06:56:47,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-11-10 06:56:47,486 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2018-11-10 06:56:47,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:47,740 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-10 06:56:47,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-10 06:56:47,740 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2018-11-10 06:56:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:47,741 INFO L225 Difference]: With dead ends: 70 [2018-11-10 06:56:47,741 INFO L226 Difference]: Without dead ends: 66 [2018-11-10 06:56:47,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-11-10 06:56:47,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-10 06:56:47,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-10 06:56:47,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-10 06:56:47,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-10 06:56:47,745 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2018-11-10 06:56:47,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:47,745 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-10 06:56:47,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-10 06:56:47,745 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-10 06:56:47,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-11-10 06:56:47,746 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:47,746 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:56:47,746 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:47,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:47,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2018-11-10 06:56:47,747 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:47,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:47,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:47,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:47,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-10 06:56:47,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:47,914 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:56:47,920 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 06:56:47,964 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-10 06:56:47,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:47,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-11-10 06:56:48,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:48,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-10 06:56:48,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-10 06:56:48,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-10 06:56:48,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-11-10 06:56:48,005 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2018-11-10 06:56:48,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:48,217 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-10 06:56:48,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-10 06:56:48,218 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2018-11-10 06:56:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:48,218 INFO L225 Difference]: With dead ends: 73 [2018-11-10 06:56:48,219 INFO L226 Difference]: Without dead ends: 69 [2018-11-10 06:56:48,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-11-10 06:56:48,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-10 06:56:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-10 06:56:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-10 06:56:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-10 06:56:48,222 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2018-11-10 06:56:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:48,223 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-10 06:56:48,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-10 06:56:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-10 06:56:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-10 06:56:48,224 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:48,224 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:56:48,225 INFO L424 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:48,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2018-11-10 06:56:48,225 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:48,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:48,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:48,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:48,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-10 06:56:48,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:48,423 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:56:48,429 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 06:56:48,470 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-10 06:56:48,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:56:48,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-11-10 06:56:48,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:48,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-10 06:56:48,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-10 06:56:48,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-10 06:56:48,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-11-10 06:56:48,515 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2018-11-10 06:56:48,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:48,769 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-10 06:56:48,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-10 06:56:48,770 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2018-11-10 06:56:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:48,770 INFO L225 Difference]: With dead ends: 76 [2018-11-10 06:56:48,771 INFO L226 Difference]: Without dead ends: 72 [2018-11-10 06:56:48,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-11-10 06:56:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-10 06:56:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-10 06:56:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-10 06:56:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-10 06:56:48,774 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2018-11-10 06:56:48,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:48,775 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-10 06:56:48,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-10 06:56:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-10 06:56:48,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-10 06:56:48,775 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:48,776 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:56:48,776 INFO L424 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:48,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:48,776 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2018-11-10 06:56:48,776 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:48,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:48,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:48,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 06:56:48,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-10 06:56:48,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:56:48,957 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:56:48,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:56:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:56:48,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:56:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-11-10 06:56:49,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:56:49,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-10 06:56:49,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-10 06:56:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-10 06:56:49,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-11-10 06:56:49,037 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2018-11-10 06:56:49,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:56:49,298 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-10 06:56:49,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-10 06:56:49,298 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2018-11-10 06:56:49,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:56:49,299 INFO L225 Difference]: With dead ends: 79 [2018-11-10 06:56:49,299 INFO L226 Difference]: Without dead ends: 75 [2018-11-10 06:56:49,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-11-10 06:56:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-10 06:56:49,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-10 06:56:49,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-10 06:56:49,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-10 06:56:49,303 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2018-11-10 06:56:49,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:56:49,304 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-10 06:56:49,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-10 06:56:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-10 06:56:49,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-10 06:56:49,310 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:56:49,310 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:56:49,311 INFO L424 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:56:49,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:56:49,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2018-11-10 06:56:49,311 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 06:56:49,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 06:56:49,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:49,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:56:49,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:56:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 06:56:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 06:56:49,363 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 06:56:49,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 06:56:49 BoogieIcfgContainer [2018-11-10 06:56:49,399 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 06:56:49,399 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 06:56:49,399 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 06:56:49,399 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 06:56:49,400 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:56:40" (3/4) ... [2018-11-10 06:56:49,403 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 06:56:49,452 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_9c4168c9-74fd-49a5-8b49-3db92396820c/bin-2019/uautomizer/witness.graphml [2018-11-10 06:56:49,452 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 06:56:49,453 INFO L168 Benchmark]: Toolchain (without parser) took 8863.57 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 355.5 MB). Free memory was 952.7 MB in the beginning and 1.1 GB in the end (delta: -111.8 MB). Peak memory consumption was 243.6 MB. Max. memory is 11.5 GB. [2018-11-10 06:56:49,455 INFO L168 Benchmark]: CDTParser took 0.19 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 06:56:49,455 INFO L168 Benchmark]: CACSL2BoogieTranslator took 180.60 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 942.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 06:56:49,456 INFO L168 Benchmark]: Boogie Preprocessor took 20.43 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:56:49,456 INFO L168 Benchmark]: RCFGBuilder took 197.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 942.0 MB in the beginning and 1.2 GB in the end (delta: -211.2 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2018-11-10 06:56:49,456 INFO L168 Benchmark]: TraceAbstraction took 8407.78 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 192.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 73.3 MB). Peak memory consumption was 265.7 MB. Max. memory is 11.5 GB. [2018-11-10 06:56:49,456 INFO L168 Benchmark]: Witness Printer took 53.48 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-11-10 06:56:49,458 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 180.60 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 942.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.43 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 197.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 942.0 MB in the beginning and 1.2 GB in the end (delta: -211.2 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8407.78 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 192.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 73.3 MB). Peak memory consumption was 265.7 MB. Max. memory is 11.5 GB. * Witness Printer took 53.48 ms. Allocated memory is still 1.4 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 20; [L13] int b = 0; VAL [a=20, b=0] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=20] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=20, m=0, n=20] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=19, m=1, n=19] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=18, m=2, n=18] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=17, m=3, n=17] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=16, m=4, n=16] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=15, m=5, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=14, m=6, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=13, m=7, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=12, m=8, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=11, m=9, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=10, m=10, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=9, m=11, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=8, m=12, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=7, m=13, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=6, m=14, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=5, m=15, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=4, m=16, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=3, m=17, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=2, m=18, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=1, m=19, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=0] [L4] COND TRUE n <= 0 [L5] RET return m + n; VAL [\old(m)=20, \old(n)=0, \result=20, m=20, n=0] [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1, m=19, n=1, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2, m=18, n=2, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3, m=17, n=3, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4, m=16, n=4, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5, m=15, n=5, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6, m=14, n=6, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7, m=13, n=7, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8, m=12, n=8, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9, m=11, n=9, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10, m=10, n=10, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11, m=9, n=11, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12, m=8, n=12, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13, m=7, n=13, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14, m=6, n=14, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15, m=5, n=15, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16, m=4, n=16, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17, m=3, n=17, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18, m=2, n=18, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19, m=1, n=19, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=20, m=0, n=20, sum(n - 1, m + 1)=20] [L7] RET return sum(n - 1, m + 1); [L14] EXPR sum(a, b) VAL [a=20, b=0, sum(a, b)=20] [L14] int result = sum(a, b); [L15] COND TRUE result == a + b VAL [a=20, b=0, result=20] [L16] __VERIFIER_error() VAL [a=20, b=0, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 8.3s OverallTime, 21 OverallIterations, 21 TraceHistogramMax, 3.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 243 SDtfs, 523 SDslu, 1855 SDs, 0 SdLazy, 1439 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2058 GetRequests, 1598 SyntacticMatches, 0 SemanticMatches, 460 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, 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: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 2920 NumberOfCodeBlocks, 2920 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2748 ConstructedInterpolants, 0 QuantifiedInterpolants, 602160 SizeOfPredicates, 228 NumberOfNonLiveVariables, 4123 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...