./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_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_50d27a28-609b-4b15-b54e-a9c2d373db9f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 d98587a14b872cd91c7aef8f28f1f51cdacaf3d4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 05:05:15,677 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 05:05:15,678 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 05:05:15,686 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 05:05:15,687 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 05:05:15,687 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 05:05:15,688 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 05:05:15,689 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 05:05:15,691 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 05:05:15,691 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 05:05:15,692 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 05:05:15,692 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 05:05:15,693 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 05:05:15,693 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 05:05:15,694 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 05:05:15,694 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 05:05:15,695 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 05:05:15,696 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 05:05:15,697 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 05:05:15,698 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 05:05:15,699 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 05:05:15,700 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 05:05:15,702 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 05:05:15,702 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 05:05:15,702 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 05:05:15,703 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 05:05:15,703 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 05:05:15,704 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 05:05:15,704 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 05:05:15,705 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 05:05:15,705 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 05:05:15,706 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 05:05:15,706 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 05:05:15,706 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 05:05:15,707 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 05:05:15,707 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 05:05:15,708 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 05:05:15,717 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 05:05:15,718 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 05:05:15,718 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 05:05:15,718 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 05:05:15,719 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 05:05:15,719 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 05:05:15,719 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 05:05:15,719 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 05:05:15,720 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 05:05:15,720 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 05:05:15,720 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 05:05:15,720 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 05:05:15,720 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 05:05:15,720 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 05:05:15,720 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 05:05:15,720 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 05:05:15,721 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 05:05:15,721 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 05:05:15,721 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 05:05:15,721 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 05:05:15,721 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 05:05:15,721 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 05:05:15,721 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 05:05:15,722 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 05:05:15,722 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 05:05:15,722 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 05:05:15,722 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 05:05:15,722 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 05:05:15,722 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 05:05:15,722 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_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 -> d98587a14b872cd91c7aef8f28f1f51cdacaf3d4 [2018-11-10 05:05:15,746 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 05:05:15,755 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 05:05:15,758 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 05:05:15,759 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 05:05:15,760 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 05:05:15,760 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_false-unreach-call_true-termination.c [2018-11-10 05:05:15,800 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/bin-2019/uautomizer/data/e499aa23e/30b0e1b654d745228ccc5f713a6241a7/FLAGfd1a7b153 [2018-11-10 05:05:16,123 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 05:05:16,124 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/sv-benchmarks/c/recursive-simple/fibo_2calls_6_false-unreach-call_true-termination.c [2018-11-10 05:05:16,129 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/bin-2019/uautomizer/data/e499aa23e/30b0e1b654d745228ccc5f713a6241a7/FLAGfd1a7b153 [2018-11-10 05:05:16,137 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/bin-2019/uautomizer/data/e499aa23e/30b0e1b654d745228ccc5f713a6241a7 [2018-11-10 05:05:16,140 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 05:05:16,141 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 05:05:16,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 05:05:16,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 05:05:16,144 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 05:05:16,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:05:16" (1/1) ... [2018-11-10 05:05:16,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32089edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:05:16, skipping insertion in model container [2018-11-10 05:05:16,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:05:16" (1/1) ... [2018-11-10 05:05:16,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 05:05:16,165 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 05:05:16,271 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:05:16,273 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 05:05:16,282 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:05:16,292 INFO L193 MainTranslator]: Completed translation [2018-11-10 05:05:16,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:05:16 WrapperNode [2018-11-10 05:05:16,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 05:05:16,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 05:05:16,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 05:05:16,293 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 05:05:16,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:05:16" (1/1) ... [2018-11-10 05:05:16,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:05:16" (1/1) ... [2018-11-10 05:05:16,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:05:16" (1/1) ... [2018-11-10 05:05:16,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:05:16" (1/1) ... [2018-11-10 05:05:16,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:05:16" (1/1) ... [2018-11-10 05:05:16,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:05:16" (1/1) ... [2018-11-10 05:05:16,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:05:16" (1/1) ... [2018-11-10 05:05:16,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 05:05:16,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 05:05:16,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 05:05:16,309 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 05:05:16,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:05:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 05:05:16,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 05:05:16,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 05:05:16,379 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-10 05:05:16,379 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-10 05:05:16,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 05:05:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-10 05:05:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 05:05:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-10 05:05:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-10 05:05:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 05:05:16,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 05:05:16,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 05:05:16,478 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 05:05:16,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:05:16 BoogieIcfgContainer [2018-11-10 05:05:16,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 05:05:16,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 05:05:16,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 05:05:16,482 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 05:05:16,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 05:05:16" (1/3) ... [2018-11-10 05:05:16,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@334e74ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:05:16, skipping insertion in model container [2018-11-10 05:05:16,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:05:16" (2/3) ... [2018-11-10 05:05:16,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@334e74ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:05:16, skipping insertion in model container [2018-11-10 05:05:16,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:05:16" (3/3) ... [2018-11-10 05:05:16,485 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6_false-unreach-call_true-termination.c [2018-11-10 05:05:16,493 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 05:05:16,497 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 05:05:16,506 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 05:05:16,523 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 05:05:16,524 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 05:05:16,524 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 05:05:16,524 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 05:05:16,524 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 05:05:16,524 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 05:05:16,524 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 05:05:16,524 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 05:05:16,525 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 05:05:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-10 05:05:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 05:05:16,540 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:16,541 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:16,543 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:16,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:16,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-10 05:05:16,549 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:16,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:16,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:16,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:16,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:16,672 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 05:05:16,673 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:05:16,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 05:05:16,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 05:05:16,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 05:05:16,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 05:05:16,685 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-10 05:05:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:16,758 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-10 05:05:16,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 05:05:16,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 05:05:16,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:16,765 INFO L225 Difference]: With dead ends: 44 [2018-11-10 05:05:16,765 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 05:05:16,767 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 05:05:16,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 05:05:16,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-10 05:05:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 05:05:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-10 05:05:16,799 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-10 05:05:16,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:16,799 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-10 05:05:16,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 05:05:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-10 05:05:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-10 05:05:16,800 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:16,800 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:16,801 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:16,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:16,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-10 05:05:16,801 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:16,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:16,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:16,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:16,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:16,837 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 05:05:16,838 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:05:16,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 05:05:16,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 05:05:16,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 05:05:16,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 05:05:16,839 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-10 05:05:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:16,905 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-10 05:05:16,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 05:05:16,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-10 05:05:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:16,906 INFO L225 Difference]: With dead ends: 36 [2018-11-10 05:05:16,906 INFO L226 Difference]: Without dead ends: 32 [2018-11-10 05:05:16,907 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 05:05:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-10 05:05:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-10 05:05:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 05:05:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-10 05:05:16,914 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-10 05:05:16,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:16,914 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-10 05:05:16,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 05:05:16,914 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-10 05:05:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-10 05:05:16,915 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:16,916 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:16,916 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:16,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:16,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-10 05:05:16,916 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:16,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:16,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:16,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:16,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 05:05:16,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:05:16,991 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 05:05:17,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:17,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:05:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 05:05:17,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:05:17,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-10 05:05:17,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 05:05:17,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 05:05:17,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-10 05:05:17,094 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-11-10 05:05:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:17,227 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-11-10 05:05:17,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 05:05:17,228 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-11-10 05:05:17,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:17,228 INFO L225 Difference]: With dead ends: 58 [2018-11-10 05:05:17,229 INFO L226 Difference]: Without dead ends: 34 [2018-11-10 05:05:17,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-10 05:05:17,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-10 05:05:17,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-10 05:05:17,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-10 05:05:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-10 05:05:17,235 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-11-10 05:05:17,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:17,235 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-10 05:05:17,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 05:05:17,235 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-10 05:05:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 05:05:17,236 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:17,237 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:17,237 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:17,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:17,237 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-10 05:05:17,237 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:17,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:17,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:17,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:17,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 05:05:17,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:05:17,290 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 05:05:17,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:17,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:05:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 05:05:17,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:05:17,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-10 05:05:17,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 05:05:17,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 05:05:17,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-10 05:05:17,343 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-11-10 05:05:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:17,438 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-11-10 05:05:17,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 05:05:17,439 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-10 05:05:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:17,440 INFO L225 Difference]: With dead ends: 43 [2018-11-10 05:05:17,440 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 05:05:17,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-10 05:05:17,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 05:05:17,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-10 05:05:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-10 05:05:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-11-10 05:05:17,445 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-11-10 05:05:17,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:17,445 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-11-10 05:05:17,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 05:05:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-11-10 05:05:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-10 05:05:17,446 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:17,446 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:17,446 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:17,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:17,447 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-10 05:05:17,447 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:17,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:17,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:17,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:17,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 05:05:17,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:05:17,508 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 05:05:17,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:17,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:05:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 05:05:17,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:05:17,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-11-10 05:05:17,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 05:05:17,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 05:05:17,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-10 05:05:17,597 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-11-10 05:05:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:17,738 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-11-10 05:05:17,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:05:17,738 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-11-10 05:05:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:17,739 INFO L225 Difference]: With dead ends: 70 [2018-11-10 05:05:17,739 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 05:05:17,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-11-10 05:05:17,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 05:05:17,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-10 05:05:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 05:05:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-11-10 05:05:17,746 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-11-10 05:05:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:17,746 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-11-10 05:05:17,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 05:05:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-11-10 05:05:17,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-10 05:05:17,747 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:17,747 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:17,747 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:17,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:17,747 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-11-10 05:05:17,747 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:17,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:17,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:17,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:17,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 05:05:17,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:05:17,789 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 05:05:17,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:17,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:05:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 05:05:17,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:05:17,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-11-10 05:05:17,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 05:05:17,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 05:05:17,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-10 05:05:17,849 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-11-10 05:05:17,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:17,937 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-11-10 05:05:17,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 05:05:17,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-11-10 05:05:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:17,939 INFO L225 Difference]: With dead ends: 61 [2018-11-10 05:05:17,940 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 05:05:17,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:05:17,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 05:05:17,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-11-10 05:05:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-10 05:05:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-11-10 05:05:17,949 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-11-10 05:05:17,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:17,949 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-11-10 05:05:17,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 05:05:17,950 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-11-10 05:05:17,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-10 05:05:17,951 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:17,951 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:17,951 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:17,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:17,952 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-11-10 05:05:17,952 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:17,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:17,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:17,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:17,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-10 05:05:18,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:05:18,012 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 05:05:18,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:18,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:05:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-10 05:05:18,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:05:18,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-11-10 05:05:18,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 05:05:18,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 05:05:18,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-10 05:05:18,107 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-11-10 05:05:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:18,198 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-11-10 05:05:18,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 05:05:18,198 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-11-10 05:05:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:18,200 INFO L225 Difference]: With dead ends: 71 [2018-11-10 05:05:18,200 INFO L226 Difference]: Without dead ends: 67 [2018-11-10 05:05:18,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:05:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-10 05:05:18,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-11-10 05:05:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-10 05:05:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-11-10 05:05:18,209 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-11-10 05:05:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:18,209 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-11-10 05:05:18,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 05:05:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-11-10 05:05:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-10 05:05:18,211 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:18,211 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:18,211 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:18,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:18,212 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-11-10 05:05:18,212 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:18,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:18,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:18,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:18,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-10 05:05:18,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:05:18,299 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 05:05:18,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:05:18,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:05:18,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:05:18,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:05:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-11-10 05:05:18,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:05:18,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2018-11-10 05:05:18,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 05:05:18,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 05:05:18,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-11-10 05:05:18,412 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 16 states. [2018-11-10 05:05:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:18,743 INFO L93 Difference]: Finished difference Result 146 states and 299 transitions. [2018-11-10 05:05:18,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 05:05:18,743 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2018-11-10 05:05:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:18,745 INFO L225 Difference]: With dead ends: 146 [2018-11-10 05:05:18,745 INFO L226 Difference]: Without dead ends: 103 [2018-11-10 05:05:18,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2018-11-10 05:05:18,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-10 05:05:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2018-11-10 05:05:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-10 05:05:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 157 transitions. [2018-11-10 05:05:18,756 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 157 transitions. Word has length 80 [2018-11-10 05:05:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:18,756 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 157 transitions. [2018-11-10 05:05:18,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 05:05:18,757 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 157 transitions. [2018-11-10 05:05:18,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-11-10 05:05:18,758 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:18,758 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:18,759 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:18,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:18,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2059253460, now seen corresponding path program 1 times [2018-11-10 05:05:18,759 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:18,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:18,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:18,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:05:18,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 66 proven. 113 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-11-10 05:05:18,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:05:18,863 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 05:05:18,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:18,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:05:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 42 proven. 134 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2018-11-10 05:05:19,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:05:19,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2018-11-10 05:05:19,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 05:05:19,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 05:05:19,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-11-10 05:05:19,023 INFO L87 Difference]: Start difference. First operand 87 states and 157 transitions. Second operand 18 states. [2018-11-10 05:05:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:19,477 INFO L93 Difference]: Finished difference Result 239 states and 535 transitions. [2018-11-10 05:05:19,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-10 05:05:19,477 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 135 [2018-11-10 05:05:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:19,479 INFO L225 Difference]: With dead ends: 239 [2018-11-10 05:05:19,479 INFO L226 Difference]: Without dead ends: 158 [2018-11-10 05:05:19,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2018-11-10 05:05:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-11-10 05:05:19,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2018-11-10 05:05:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-11-10 05:05:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 243 transitions. [2018-11-10 05:05:19,503 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 243 transitions. Word has length 135 [2018-11-10 05:05:19,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:19,503 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 243 transitions. [2018-11-10 05:05:19,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 05:05:19,504 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 243 transitions. [2018-11-10 05:05:19,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-10 05:05:19,508 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:19,508 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:19,508 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:19,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:19,509 INFO L82 PathProgramCache]: Analyzing trace with hash -789289505, now seen corresponding path program 2 times [2018-11-10 05:05:19,509 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:19,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:19,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:19,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:19,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 169 proven. 13 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2018-11-10 05:05:19,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:05:19,625 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 05:05:19,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:05:19,661 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:05:19,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:05:19,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:05:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 83 proven. 92 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2018-11-10 05:05:19,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:05:19,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2018-11-10 05:05:19,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 05:05:19,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 05:05:19,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2018-11-10 05:05:19,758 INFO L87 Difference]: Start difference. First operand 139 states and 243 transitions. Second operand 17 states. [2018-11-10 05:05:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:20,134 INFO L93 Difference]: Finished difference Result 349 states and 782 transitions. [2018-11-10 05:05:20,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-10 05:05:20,135 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 150 [2018-11-10 05:05:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:20,138 INFO L225 Difference]: With dead ends: 349 [2018-11-10 05:05:20,138 INFO L226 Difference]: Without dead ends: 201 [2018-11-10 05:05:20,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2018-11-10 05:05:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-11-10 05:05:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 174. [2018-11-10 05:05:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-11-10 05:05:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 309 transitions. [2018-11-10 05:05:20,160 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 309 transitions. Word has length 150 [2018-11-10 05:05:20,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:20,160 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 309 transitions. [2018-11-10 05:05:20,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 05:05:20,161 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 309 transitions. [2018-11-10 05:05:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-11-10 05:05:20,163 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:20,163 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 8, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:20,164 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:20,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:20,164 INFO L82 PathProgramCache]: Analyzing trace with hash -950882599, now seen corresponding path program 1 times [2018-11-10 05:05:20,164 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:20,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:20,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:20,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:05:20,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 85 proven. 85 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2018-11-10 05:05:20,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:05:20,218 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 05:05:20,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:20,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:05:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 83 proven. 137 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2018-11-10 05:05:20,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:05:20,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 13 [2018-11-10 05:05:20,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 05:05:20,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 05:05:20,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-11-10 05:05:20,372 INFO L87 Difference]: Start difference. First operand 174 states and 309 transitions. Second operand 13 states. [2018-11-10 05:05:20,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:20,644 INFO L93 Difference]: Finished difference Result 341 states and 649 transitions. [2018-11-10 05:05:20,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 05:05:20,646 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 152 [2018-11-10 05:05:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:20,647 INFO L225 Difference]: With dead ends: 341 [2018-11-10 05:05:20,648 INFO L226 Difference]: Without dead ends: 133 [2018-11-10 05:05:20,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2018-11-10 05:05:20,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-11-10 05:05:20,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 122. [2018-11-10 05:05:20,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-11-10 05:05:20,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 165 transitions. [2018-11-10 05:05:20,657 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 165 transitions. Word has length 152 [2018-11-10 05:05:20,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:20,658 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 165 transitions. [2018-11-10 05:05:20,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 05:05:20,658 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 165 transitions. [2018-11-10 05:05:20,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-10 05:05:20,659 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:20,660 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:20,660 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:20,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:20,660 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 3 times [2018-11-10 05:05:20,660 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:20,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:20,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:20,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:05:20,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2018-11-10 05:05:20,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:05:20,719 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 05:05:20,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 05:05:20,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-10 05:05:20,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:05:20,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:05:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 109 proven. 27 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2018-11-10 05:05:20,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:05:20,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-11-10 05:05:20,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 05:05:20,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 05:05:20,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-10 05:05:20,775 INFO L87 Difference]: Start difference. First operand 122 states and 165 transitions. Second operand 10 states. [2018-11-10 05:05:20,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:20,848 INFO L93 Difference]: Finished difference Result 134 states and 178 transitions. [2018-11-10 05:05:20,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 05:05:20,849 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 150 [2018-11-10 05:05:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:20,850 INFO L225 Difference]: With dead ends: 134 [2018-11-10 05:05:20,850 INFO L226 Difference]: Without dead ends: 127 [2018-11-10 05:05:20,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:05:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-10 05:05:20,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2018-11-10 05:05:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-11-10 05:05:20,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 168 transitions. [2018-11-10 05:05:20,860 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 168 transitions. Word has length 150 [2018-11-10 05:05:20,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:20,860 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 168 transitions. [2018-11-10 05:05:20,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 05:05:20,860 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 168 transitions. [2018-11-10 05:05:20,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-11-10 05:05:20,863 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:20,863 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 17, 14, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:20,864 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:20,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:20,864 INFO L82 PathProgramCache]: Analyzing trace with hash 214574526, now seen corresponding path program 4 times [2018-11-10 05:05:20,864 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:20,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:20,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:20,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:05:20,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 313 proven. 173 refuted. 0 times theorem prover too weak. 1517 trivial. 0 not checked. [2018-11-10 05:05:21,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:05:21,059 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 05:05:21,067 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 05:05:21,113 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 05:05:21,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:05:21,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:05:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 174 proven. 310 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2018-11-10 05:05:21,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:05:21,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2018-11-10 05:05:21,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 05:05:21,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 05:05:21,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:05:21,212 INFO L87 Difference]: Start difference. First operand 125 states and 168 transitions. Second operand 15 states. [2018-11-10 05:05:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:21,376 INFO L93 Difference]: Finished difference Result 147 states and 205 transitions. [2018-11-10 05:05:21,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 05:05:21,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 272 [2018-11-10 05:05:21,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:21,378 INFO L225 Difference]: With dead ends: 147 [2018-11-10 05:05:21,378 INFO L226 Difference]: Without dead ends: 125 [2018-11-10 05:05:21,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2018-11-10 05:05:21,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-11-10 05:05:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-11-10 05:05:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-11-10 05:05:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 165 transitions. [2018-11-10 05:05:21,385 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 165 transitions. Word has length 272 [2018-11-10 05:05:21,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:21,385 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 165 transitions. [2018-11-10 05:05:21,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 05:05:21,385 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 165 transitions. [2018-11-10 05:05:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-10 05:05:21,387 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:21,388 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:21,388 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:21,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:21,388 INFO L82 PathProgramCache]: Analyzing trace with hash -854759576, now seen corresponding path program 5 times [2018-11-10 05:05:21,388 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:21,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:21,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:21,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:05:21,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 267 proven. 35 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-11-10 05:05:21,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:05:21,536 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 05:05:21,543 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 05:05:21,570 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-11-10 05:05:21,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:05:21,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:05:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 171 proven. 273 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2018-11-10 05:05:21,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:05:21,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2018-11-10 05:05:21,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-10 05:05:21,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-10 05:05:21,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2018-11-10 05:05:21,711 INFO L87 Difference]: Start difference. First operand 125 states and 165 transitions. Second operand 21 states. [2018-11-10 05:05:22,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:22,230 INFO L93 Difference]: Finished difference Result 318 states and 501 transitions. [2018-11-10 05:05:22,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-10 05:05:22,230 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 191 [2018-11-10 05:05:22,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:22,232 INFO L225 Difference]: With dead ends: 318 [2018-11-10 05:05:22,232 INFO L226 Difference]: Without dead ends: 192 [2018-11-10 05:05:22,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=1661, Unknown=0, NotChecked=0, Total=1980 [2018-11-10 05:05:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-11-10 05:05:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 156. [2018-11-10 05:05:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-11-10 05:05:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 209 transitions. [2018-11-10 05:05:22,243 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 209 transitions. Word has length 191 [2018-11-10 05:05:22,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:22,244 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 209 transitions. [2018-11-10 05:05:22,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-10 05:05:22,244 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 209 transitions. [2018-11-10 05:05:22,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-11-10 05:05:22,245 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:22,245 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 14, 14, 13, 12, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:22,245 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:22,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:22,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2094292409, now seen corresponding path program 6 times [2018-11-10 05:05:22,245 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:22,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:22,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:22,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:05:22,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:05:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1420 backedges. 108 proven. 348 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2018-11-10 05:05:22,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:05:22,359 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/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 05:05:22,365 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 05:05:22,406 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-11-10 05:05:22,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:05:22,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:05:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1420 backedges. 402 proven. 31 refuted. 0 times theorem prover too weak. 987 trivial. 0 not checked. [2018-11-10 05:05:22,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:05:22,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2018-11-10 05:05:22,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-10 05:05:22,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-10 05:05:22,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2018-11-10 05:05:22,498 INFO L87 Difference]: Start difference. First operand 156 states and 209 transitions. Second operand 21 states. [2018-11-10 05:05:22,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:05:22,931 INFO L93 Difference]: Finished difference Result 330 states and 488 transitions. [2018-11-10 05:05:22,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-10 05:05:22,932 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 230 [2018-11-10 05:05:22,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:05:22,933 INFO L225 Difference]: With dead ends: 330 [2018-11-10 05:05:22,933 INFO L226 Difference]: Without dead ends: 119 [2018-11-10 05:05:22,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2018-11-10 05:05:22,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-10 05:05:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2018-11-10 05:05:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-11-10 05:05:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2018-11-10 05:05:22,942 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 230 [2018-11-10 05:05:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:05:22,943 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2018-11-10 05:05:22,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-10 05:05:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2018-11-10 05:05:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-10 05:05:22,944 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:05:22,944 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:05:22,944 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:05:22,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:05:22,944 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 7 times [2018-11-10 05:05:22,944 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:05:22,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:05:22,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:22,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:05:22,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:05:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:05:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:05:22,984 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 05:05:23,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 05:05:23 BoogieIcfgContainer [2018-11-10 05:05:23,015 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 05:05:23,015 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 05:05:23,015 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 05:05:23,016 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 05:05:23,016 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:05:16" (3/4) ... [2018-11-10 05:05:23,018 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 05:05:23,071 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_50d27a28-609b-4b15-b54e-a9c2d373db9f/bin-2019/uautomizer/witness.graphml [2018-11-10 05:05:23,071 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 05:05:23,072 INFO L168 Benchmark]: Toolchain (without parser) took 6931.99 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 379.1 MB). Free memory was 960.3 MB in the beginning and 997.3 MB in the end (delta: -37.0 MB). Peak memory consumption was 342.1 MB. Max. memory is 11.5 GB. [2018-11-10 05:05:23,073 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:05:23,073 INFO L168 Benchmark]: CACSL2BoogieTranslator took 151.06 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 948.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-10 05:05:23,074 INFO L168 Benchmark]: Boogie Preprocessor took 15.88 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:05:23,074 INFO L168 Benchmark]: RCFGBuilder took 170.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.3 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -194.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2018-11-10 05:05:23,074 INFO L168 Benchmark]: TraceAbstraction took 6535.68 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 221.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 136.0 MB). Peak memory consumption was 357.7 MB. Max. memory is 11.5 GB. [2018-11-10 05:05:23,074 INFO L168 Benchmark]: Witness Printer took 56.11 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 997.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2018-11-10 05:05:23,075 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 151.06 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 948.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.88 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 170.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.3 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -194.6 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6535.68 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 221.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 136.0 MB). Peak memory consumption was 357.7 MB. Max. memory is 11.5 GB. * Witness Printer took 56.11 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 997.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 6; VAL [x=6] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=6] [L8] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L10] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L18] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L20] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L13] EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L13] EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] RET return fibo2(n-1) + fibo2(n-2); [L23] EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L23] EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] RET return fibo1(n-1) + fibo1(n-2); [L13] EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L23] EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L23] EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] RET return fibo1(n-1) + fibo1(n-2); [L13] EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] RET return fibo2(n-1) + fibo2(n-2); [L23] EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L23] EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L23] EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] RET return fibo1(n-1) + fibo1(n-2); [L13] EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L13] EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] RET return fibo2(n-1) + fibo2(n-2); [L23] EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L23] RET return fibo1(n-1) + fibo1(n-2); [L13] EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L23] EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L23] EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] RET return fibo1(n-1) + fibo1(n-2); [L13] EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L13] EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] RET return fibo2(n-1) + fibo2(n-2); [L23] EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] RET return 1; VAL [\old(n)=1, \result=1, n=1] [L13] EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] RET return 0; VAL [\old(n)=0, \result=0, n=0] [L13] EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] RET return fibo2(n-1) + fibo2(n-2); [L23] EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] RET return fibo1(n-1) + fibo1(n-2); [L13] EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L13] RET return fibo2(n-1) + fibo2(n-2); [L37] EXPR fibo1(x) VAL [fibo1(x)=8, x=6] [L37] int result = fibo1(x); [L38] COND TRUE result == 8 VAL [result=8, x=6] [L39] __VERIFIER_error() VAL [result=8, x=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. UNSAFE Result, 6.4s OverallTime, 16 OverallIterations, 21 TraceHistogramMax, 3.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 458 SDtfs, 699 SDslu, 2883 SDs, 0 SdLazy, 4019 SolverSat, 731 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1819 GetRequests, 1528 SyntacticMatches, 3 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=10, 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, 15 MinimizatonAttempts, 153 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 3296 NumberOfCodeBlocks, 3046 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 3091 ConstructedInterpolants, 0 QuantifiedInterpolants, 742547 SizeOfPredicates, 67 NumberOfNonLiveVariables, 2875 ConjunctsInSsa, 135 ConjunctsInUnsatCore, 28 InterpolantComputations, 2 PerfectInterpolantSequences, 11364/13322 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...