./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_15_true-unreach-call.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_7cbe9fda-9952-44c4-a62d-f53414206c9d/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_15_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 e276c1695adb4f8d30ce6cf27956cb3af3968bc9 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 05:07:51,544 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 05:07:51,546 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 05:07:51,555 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 05:07:51,555 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 05:07:51,556 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 05:07:51,556 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 05:07:51,558 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 05:07:51,559 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 05:07:51,559 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 05:07:51,560 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 05:07:51,560 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 05:07:51,561 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 05:07:51,561 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 05:07:51,562 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 05:07:51,563 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 05:07:51,564 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 05:07:51,565 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 05:07:51,566 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 05:07:51,568 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 05:07:51,569 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 05:07:51,570 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 05:07:51,571 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 05:07:51,571 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 05:07:51,572 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 05:07:51,572 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 05:07:51,573 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 05:07:51,573 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 05:07:51,574 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 05:07:51,575 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 05:07:51,575 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 05:07:51,576 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 05:07:51,576 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 05:07:51,576 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 05:07:51,577 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 05:07:51,577 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 05:07:51,578 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 05:07:51,587 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 05:07:51,587 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 05:07:51,588 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 05:07:51,588 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 05:07:51,589 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 05:07:51,589 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 05:07:51,589 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 05:07:51,589 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 05:07:51,589 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 05:07:51,589 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 05:07:51,590 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 05:07:51,590 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 05:07:51,590 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 05:07:51,590 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 05:07:51,590 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 05:07:51,590 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 05:07:51,590 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 05:07:51,590 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 05:07:51,591 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 05:07:51,591 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 05:07:51,591 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 05:07:51,593 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 05:07:51,593 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 05:07:51,593 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 05:07:51,593 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 05:07:51,593 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 05:07:51,593 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 05:07:51,593 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 05:07:51,594 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 05:07:51,594 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_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 -> e276c1695adb4f8d30ce6cf27956cb3af3968bc9 [2018-11-10 05:07:51,618 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 05:07:51,627 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 05:07:51,630 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 05:07:51,632 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 05:07:51,632 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 05:07:51,632 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_15_true-unreach-call.c [2018-11-10 05:07:51,679 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/bin-2019/uautomizer/data/0dff56a38/f4cf7491dd214332b64d333522c93c7f/FLAG3af502b16 [2018-11-10 05:07:52,037 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 05:07:52,037 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/sv-benchmarks/c/recursive-simple/fibo_15_true-unreach-call.c [2018-11-10 05:07:52,042 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/bin-2019/uautomizer/data/0dff56a38/f4cf7491dd214332b64d333522c93c7f/FLAG3af502b16 [2018-11-10 05:07:52,052 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/bin-2019/uautomizer/data/0dff56a38/f4cf7491dd214332b64d333522c93c7f [2018-11-10 05:07:52,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 05:07:52,055 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 05:07:52,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 05:07:52,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 05:07:52,058 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 05:07:52,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:07:52" (1/1) ... [2018-11-10 05:07:52,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c5e423d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:07:52, skipping insertion in model container [2018-11-10 05:07:52,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:07:52" (1/1) ... [2018-11-10 05:07:52,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 05:07:52,080 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 05:07:52,170 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:07:52,172 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 05:07:52,181 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:07:52,190 INFO L193 MainTranslator]: Completed translation [2018-11-10 05:07:52,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:07:52 WrapperNode [2018-11-10 05:07:52,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 05:07:52,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 05:07:52,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 05:07:52,191 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 05:07:52,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:07:52" (1/1) ... [2018-11-10 05:07:52,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:07:52" (1/1) ... [2018-11-10 05:07:52,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:07:52" (1/1) ... [2018-11-10 05:07:52,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:07:52" (1/1) ... [2018-11-10 05:07:52,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:07:52" (1/1) ... [2018-11-10 05:07:52,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:07:52" (1/1) ... [2018-11-10 05:07:52,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:07:52" (1/1) ... [2018-11-10 05:07:52,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 05:07:52,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 05:07:52,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 05:07:52,214 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 05:07:52,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:07:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 05:07:52,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 05:07:52,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 05:07:52,330 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-10 05:07:52,330 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 05:07:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-10 05:07:52,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 05:07:52,331 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-10 05:07:52,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 05:07:52,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 05:07:52,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 05:07:52,458 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 05:07:52,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:07:52 BoogieIcfgContainer [2018-11-10 05:07:52,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 05:07:52,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 05:07:52,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 05:07:52,462 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 05:07:52,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 05:07:52" (1/3) ... [2018-11-10 05:07:52,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e5282d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:07:52, skipping insertion in model container [2018-11-10 05:07:52,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:07:52" (2/3) ... [2018-11-10 05:07:52,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e5282d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:07:52, skipping insertion in model container [2018-11-10 05:07:52,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:07:52" (3/3) ... [2018-11-10 05:07:52,465 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_15_true-unreach-call.c [2018-11-10 05:07:52,473 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 05:07:52,480 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 05:07:52,489 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 05:07:52,508 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 05:07:52,508 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 05:07:52,509 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 05:07:52,509 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 05:07:52,509 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 05:07:52,509 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 05:07:52,509 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 05:07:52,509 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 05:07:52,509 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 05:07:52,522 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-10 05:07:52,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 05:07:52,526 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:07:52,526 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:07:52,527 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:07:52,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:07:52,531 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-11-10 05:07:52,532 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:07:52,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:07:52,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:52,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:07:52,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:52,648 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 05:07:52,650 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:07:52,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 05:07:52,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 05:07:52,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 05:07:52,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 05:07:52,663 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-10 05:07:52,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:07:52,733 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-10 05:07:52,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 05:07:52,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 05:07:52,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:07:52,741 INFO L225 Difference]: With dead ends: 35 [2018-11-10 05:07:52,741 INFO L226 Difference]: Without dead ends: 21 [2018-11-10 05:07:52,743 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 05:07:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-10 05:07:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-10 05:07:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 05:07:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-10 05:07:52,774 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-10 05:07:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:07:52,774 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-10 05:07:52,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 05:07:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-10 05:07:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-10 05:07:52,775 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:07:52,775 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:07:52,775 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:07:52,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:07:52,776 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-11-10 05:07:52,776 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:07:52,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:07:52,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:52,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:07:52,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:52,810 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 05:07:52,811 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:07:52,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 05:07:52,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 05:07:52,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 05:07:52,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 05:07:52,813 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-10 05:07:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:07:52,881 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-10 05:07:52,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 05:07:52,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-10 05:07:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:07:52,883 INFO L225 Difference]: With dead ends: 27 [2018-11-10 05:07:52,883 INFO L226 Difference]: Without dead ends: 23 [2018-11-10 05:07:52,883 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 05:07:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-10 05:07:52,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-10 05:07:52,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 05:07:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-10 05:07:52,889 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-10 05:07:52,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:07:52,889 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-10 05:07:52,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 05:07:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-10 05:07:52,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-10 05:07:52,890 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:07:52,890 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:07:52,890 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:07:52,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:07:52,891 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-11-10 05:07:52,891 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:07:52,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:07:52,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:52,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:07:52,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 05:07:52,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:07:52,962 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 05:07:52,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:07:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:52,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:07:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 05:07:53,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:07:53,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-10 05:07:53,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 05:07:53,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 05:07:53,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-10 05:07:53,053 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-10 05:07:53,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:07:53,160 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-10 05:07:53,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 05:07:53,161 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-10 05:07:53,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:07:53,161 INFO L225 Difference]: With dead ends: 38 [2018-11-10 05:07:53,162 INFO L226 Difference]: Without dead ends: 23 [2018-11-10 05:07:53,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:07:53,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-10 05:07:53,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-10 05:07:53,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-10 05:07:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-10 05:07:53,168 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-10 05:07:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:07:53,168 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-10 05:07:53,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 05:07:53,168 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-10 05:07:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 05:07:53,169 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:07:53,169 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:07:53,169 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:07:53,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:07:53,170 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-11-10 05:07:53,170 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:07:53,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:07:53,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:53,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:07:53,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 05:07:53,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:07:53,210 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 05:07:53,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:07:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:53,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:07:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-10 05:07:53,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:07:53,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-10 05:07:53,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 05:07:53,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 05:07:53,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-10 05:07:53,269 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-10 05:07:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:07:53,314 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-10 05:07:53,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 05:07:53,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-10 05:07:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:07:53,315 INFO L225 Difference]: With dead ends: 32 [2018-11-10 05:07:53,315 INFO L226 Difference]: Without dead ends: 28 [2018-11-10 05:07:53,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-10 05:07:53,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-10 05:07:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-10 05:07:53,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-10 05:07:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-10 05:07:53,320 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-10 05:07:53,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:07:53,320 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-10 05:07:53,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 05:07:53,320 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-10 05:07:53,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-10 05:07:53,321 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:07:53,321 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:07:53,321 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:07:53,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:07:53,321 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-11-10 05:07:53,321 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:07:53,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:07:53,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:53,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:07:53,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 05:07:53,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:07:53,374 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 05:07:53,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:07:53,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:07:53,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:07:53,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:07:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-10 05:07:53,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:07:53,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-11-10 05:07:53,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 05:07:53,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 05:07:53,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-10 05:07:53,474 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-11-10 05:07:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:07:53,545 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-11-10 05:07:53,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 05:07:53,546 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-10 05:07:53,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:07:53,547 INFO L225 Difference]: With dead ends: 40 [2018-11-10 05:07:53,548 INFO L226 Difference]: Without dead ends: 36 [2018-11-10 05:07:53,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:07:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-10 05:07:53,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-10 05:07:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 05:07:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-10 05:07:53,556 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-10 05:07:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:07:53,556 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-10 05:07:53,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 05:07:53,556 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-10 05:07:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-10 05:07:53,559 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:07:53,559 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:07:53,559 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:07:53,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:07:53,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-11-10 05:07:53,560 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:07:53,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:07:53,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:53,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:07:53,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-10 05:07:53,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:07:53,712 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 05:07:53,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 05:07:53,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-10 05:07:53,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:07:53,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:07:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-10 05:07:53,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:07:53,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-10 05:07:53,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 05:07:53,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 05:07:53,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:07:53,798 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-11-10 05:07:53,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:07:53,988 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-11-10 05:07:53,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:07:53,989 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-11-10 05:07:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:07:53,990 INFO L225 Difference]: With dead ends: 76 [2018-11-10 05:07:53,990 INFO L226 Difference]: Without dead ends: 49 [2018-11-10 05:07:53,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-10 05:07:53,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-10 05:07:53,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-11-10 05:07:53,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-10 05:07:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-11-10 05:07:53,999 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-11-10 05:07:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:07:54,000 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-11-10 05:07:54,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 05:07:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-11-10 05:07:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-10 05:07:54,002 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:07:54,002 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:07:54,002 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:07:54,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:07:54,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2018-11-10 05:07:54,003 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:07:54,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:07:54,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:54,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:07:54,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2018-11-10 05:07:54,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:07:54,089 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 05:07:54,095 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 05:07:54,110 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 05:07:54,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:07:54,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:07:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 74 proven. 118 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-11-10 05:07:54,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:07:54,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 13 [2018-11-10 05:07:54,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 05:07:54,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 05:07:54,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-11-10 05:07:54,215 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 13 states. [2018-11-10 05:07:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:07:54,460 INFO L93 Difference]: Finished difference Result 94 states and 158 transitions. [2018-11-10 05:07:54,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 05:07:54,461 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2018-11-10 05:07:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:07:54,462 INFO L225 Difference]: With dead ends: 94 [2018-11-10 05:07:54,462 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 05:07:54,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2018-11-10 05:07:54,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 05:07:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2018-11-10 05:07:54,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-10 05:07:54,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2018-11-10 05:07:54,468 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 82 [2018-11-10 05:07:54,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:07:54,468 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2018-11-10 05:07:54,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 05:07:54,469 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2018-11-10 05:07:54,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-10 05:07:54,470 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:07:54,470 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:07:54,470 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:07:54,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:07:54,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2018-11-10 05:07:54,470 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:07:54,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:07:54,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:54,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:07:54,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 174 proven. 59 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-11-10 05:07:54,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:07:54,540 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 05:07:54,547 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 05:07:54,574 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-11-10 05:07:54,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:07:54,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:07:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2018-11-10 05:07:54,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:07:54,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2018-11-10 05:07:54,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 05:07:54,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 05:07:54,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-10 05:07:54,618 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 9 states. [2018-11-10 05:07:54,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:07:54,688 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2018-11-10 05:07:54,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 05:07:54,688 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 109 [2018-11-10 05:07:54,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:07:54,690 INFO L225 Difference]: With dead ends: 63 [2018-11-10 05:07:54,690 INFO L226 Difference]: Without dead ends: 59 [2018-11-10 05:07:54,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-10 05:07:54,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-10 05:07:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-11-10 05:07:54,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-10 05:07:54,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2018-11-10 05:07:54,695 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 109 [2018-11-10 05:07:54,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:07:54,695 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2018-11-10 05:07:54,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 05:07:54,696 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2018-11-10 05:07:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-11-10 05:07:54,699 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:07:54,699 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 31, 19, 19, 19, 19, 19, 19, 19, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:07:54,699 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:07:54,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:07:54,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1347757876, now seen corresponding path program 6 times [2018-11-10 05:07:54,700 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:07:54,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:07:54,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:54,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:07:54,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 171 proven. 747 refuted. 0 times theorem prover too weak. 3195 trivial. 0 not checked. [2018-11-10 05:07:54,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:07:54,824 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 05:07:54,831 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 05:07:54,882 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-11-10 05:07:54,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:07:54,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:07:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 328 proven. 734 refuted. 0 times theorem prover too weak. 3051 trivial. 0 not checked. [2018-11-10 05:07:54,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:07:54,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2018-11-10 05:07:54,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 05:07:54,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 05:07:54,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-10 05:07:54,962 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand 12 states. [2018-11-10 05:07:55,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:07:55,084 INFO L93 Difference]: Finished difference Result 73 states and 111 transitions. [2018-11-10 05:07:55,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 05:07:55,085 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 272 [2018-11-10 05:07:55,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:07:55,087 INFO L225 Difference]: With dead ends: 73 [2018-11-10 05:07:55,088 INFO L226 Difference]: Without dead ends: 69 [2018-11-10 05:07:55,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-10 05:07:55,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-10 05:07:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-10 05:07:55,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-10 05:07:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 104 transitions. [2018-11-10 05:07:55,099 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 104 transitions. Word has length 272 [2018-11-10 05:07:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:07:55,099 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 104 transitions. [2018-11-10 05:07:55,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 05:07:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 104 transitions. [2018-11-10 05:07:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2018-11-10 05:07:55,114 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:07:55,114 INFO L375 BasicCegarLoop]: trace histogram [93, 93, 75, 46, 46, 46, 46, 46, 46, 46, 29, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:07:55,114 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:07:55,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:07:55,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1553460577, now seen corresponding path program 7 times [2018-11-10 05:07:55,115 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:07:55,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:07:55,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:55,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:07:55,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 24027 backedges. 2988 proven. 122 refuted. 0 times theorem prover too weak. 20917 trivial. 0 not checked. [2018-11-10 05:07:55,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:07:55,432 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 05:07:55,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:07:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:55,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:07:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 24027 backedges. 468 proven. 3319 refuted. 0 times theorem prover too weak. 20240 trivial. 0 not checked. [2018-11-10 05:07:55,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:07:55,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2018-11-10 05:07:55,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-10 05:07:55,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-10 05:07:55,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2018-11-10 05:07:55,846 INFO L87 Difference]: Start difference. First operand 69 states and 104 transitions. Second operand 20 states. [2018-11-10 05:07:56,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:07:56,462 INFO L93 Difference]: Finished difference Result 181 states and 368 transitions. [2018-11-10 05:07:56,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-10 05:07:56,462 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 640 [2018-11-10 05:07:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:07:56,464 INFO L225 Difference]: With dead ends: 181 [2018-11-10 05:07:56,464 INFO L226 Difference]: Without dead ends: 122 [2018-11-10 05:07:56,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 636 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=676, Invalid=2294, Unknown=0, NotChecked=0, Total=2970 [2018-11-10 05:07:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-11-10 05:07:56,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2018-11-10 05:07:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-11-10 05:07:56,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 169 transitions. [2018-11-10 05:07:56,478 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 169 transitions. Word has length 640 [2018-11-10 05:07:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:07:56,479 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 169 transitions. [2018-11-10 05:07:56,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-10 05:07:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 169 transitions. [2018-11-10 05:07:56,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2018-11-10 05:07:56,484 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:07:56,484 INFO L375 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:07:56,484 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:07:56,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:07:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash -127293739, now seen corresponding path program 8 times [2018-11-10 05:07:56,485 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:07:56,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:07:56,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:56,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:07:56,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 2731 proven. 1215 refuted. 0 times theorem prover too weak. 29150 trivial. 0 not checked. [2018-11-10 05:07:56,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:07:56,931 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 05:07:56,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:07:57,095 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:07:57,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:07:57,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:07:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 659 proven. 4380 refuted. 0 times theorem prover too weak. 28057 trivial. 0 not checked. [2018-11-10 05:07:57,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:07:57,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 13 [2018-11-10 05:07:57,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 05:07:57,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 05:07:57,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-11-10 05:07:57,351 INFO L87 Difference]: Start difference. First operand 115 states and 169 transitions. Second operand 13 states. [2018-11-10 05:07:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:07:57,476 INFO L93 Difference]: Finished difference Result 124 states and 189 transitions. [2018-11-10 05:07:57,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 05:07:57,476 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 749 [2018-11-10 05:07:57,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:07:57,479 INFO L225 Difference]: With dead ends: 124 [2018-11-10 05:07:57,479 INFO L226 Difference]: Without dead ends: 120 [2018-11-10 05:07:57,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 754 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-11-10 05:07:57,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-11-10 05:07:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-11-10 05:07:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-11-10 05:07:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 184 transitions. [2018-11-10 05:07:57,490 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 184 transitions. Word has length 749 [2018-11-10 05:07:57,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:07:57,491 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 184 transitions. [2018-11-10 05:07:57,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 05:07:57,491 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 184 transitions. [2018-11-10 05:07:57,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1390 [2018-11-10 05:07:57,505 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:07:57,505 INFO L375 BasicCegarLoop]: trace histogram [203, 203, 164, 101, 101, 101, 101, 101, 101, 101, 63, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:07:57,505 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:07:57,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:07:57,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2019342856, now seen corresponding path program 9 times [2018-11-10 05:07:57,505 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:07:57,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:07:57,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:57,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:07:57,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:07:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 115578 backedges. 6224 proven. 2453 refuted. 0 times theorem prover too weak. 106901 trivial. 0 not checked. [2018-11-10 05:07:58,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:07:58,264 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 05:07:58,271 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 05:07:58,405 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-11-10 05:07:58,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:07:58,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:07:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 115578 backedges. 1320 proven. 9520 refuted. 0 times theorem prover too weak. 104738 trivial. 0 not checked. [2018-11-10 05:07:59,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:07:59,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2018-11-10 05:07:59,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 05:07:59,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 05:07:59,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-11-10 05:07:59,055 INFO L87 Difference]: Start difference. First operand 120 states and 184 transitions. Second operand 14 states. [2018-11-10 05:07:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:07:59,221 INFO L93 Difference]: Finished difference Result 129 states and 206 transitions. [2018-11-10 05:07:59,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-10 05:07:59,222 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1389 [2018-11-10 05:07:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:07:59,225 INFO L225 Difference]: With dead ends: 129 [2018-11-10 05:07:59,225 INFO L226 Difference]: Without dead ends: 125 [2018-11-10 05:07:59,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1417 GetRequests, 1395 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-11-10 05:07:59,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-11-10 05:07:59,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-11-10 05:07:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-11-10 05:07:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 201 transitions. [2018-11-10 05:07:59,236 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 201 transitions. Word has length 1389 [2018-11-10 05:07:59,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:07:59,238 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 201 transitions. [2018-11-10 05:07:59,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 05:07:59,238 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 201 transitions. [2018-11-10 05:07:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2643 [2018-11-10 05:07:59,262 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:07:59,263 INFO L375 BasicCegarLoop]: trace histogram [387, 387, 313, 193, 193, 193, 193, 193, 193, 193, 120, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:07:59,263 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:07:59,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:07:59,263 INFO L82 PathProgramCache]: Analyzing trace with hash 662695642, now seen corresponding path program 10 times [2018-11-10 05:07:59,264 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:07:59,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:07:59,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:59,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:07:59,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:07:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:08:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 421704 backedges. 2423 proven. 18739 refuted. 0 times theorem prover too weak. 400542 trivial. 0 not checked. [2018-11-10 05:08:01,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:08:01,482 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 05:08:01,487 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 05:08:01,796 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 05:08:01,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:08:01,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:08:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 421704 backedges. 188741 proven. 6427 refuted. 0 times theorem prover too weak. 226536 trivial. 0 not checked. [2018-11-10 05:08:03,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:08:03,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 25 [2018-11-10 05:08:03,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-10 05:08:03,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-10 05:08:03,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-11-10 05:08:03,827 INFO L87 Difference]: Start difference. First operand 125 states and 201 transitions. Second operand 25 states. [2018-11-10 05:08:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:08:04,986 INFO L93 Difference]: Finished difference Result 341 states and 837 transitions. [2018-11-10 05:08:04,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-11-10 05:08:04,987 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 2642 [2018-11-10 05:08:04,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:08:04,990 INFO L225 Difference]: With dead ends: 341 [2018-11-10 05:08:04,990 INFO L226 Difference]: Without dead ends: 226 [2018-11-10 05:08:04,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2726 GetRequests, 2641 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1408, Invalid=6074, Unknown=0, NotChecked=0, Total=7482 [2018-11-10 05:08:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-11-10 05:08:05,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 198. [2018-11-10 05:08:05,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-11-10 05:08:05,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 322 transitions. [2018-11-10 05:08:05,006 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 322 transitions. Word has length 2642 [2018-11-10 05:08:05,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:08:05,007 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 322 transitions. [2018-11-10 05:08:05,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-10 05:08:05,007 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 322 transitions. [2018-11-10 05:08:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3460 [2018-11-10 05:08:05,046 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:08:05,047 INFO L375 BasicCegarLoop]: trace histogram [507, 507, 410, 253, 253, 253, 253, 253, 253, 253, 157, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:08:05,047 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:08:05,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:08:05,048 INFO L82 PathProgramCache]: Analyzing trace with hash -827558902, now seen corresponding path program 11 times [2018-11-10 05:08:05,048 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:08:05,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:08:05,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:08:05,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:08:05,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:08:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:08:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 724441 backedges. 3564 proven. 27158 refuted. 0 times theorem prover too weak. 693719 trivial. 0 not checked. [2018-11-10 05:08:08,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:08:08,456 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 05:08:08,462 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-10 05:08:12,472 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 330 check-sat command(s) [2018-11-10 05:08:12,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:08:12,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:08:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 724441 backedges. 199820 proven. 7439 refuted. 0 times theorem prover too weak. 517182 trivial. 0 not checked. [2018-11-10 05:08:15,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:08:15,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21] total 28 [2018-11-10 05:08:15,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-10 05:08:15,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-10 05:08:15,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2018-11-10 05:08:15,581 INFO L87 Difference]: Start difference. First operand 198 states and 322 transitions. Second operand 28 states. [2018-11-10 05:08:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:08:16,571 INFO L93 Difference]: Finished difference Result 453 states and 950 transitions. [2018-11-10 05:08:16,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-11-10 05:08:16,571 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 3459 [2018-11-10 05:08:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:08:16,576 INFO L225 Difference]: With dead ends: 453 [2018-11-10 05:08:16,576 INFO L226 Difference]: Without dead ends: 273 [2018-11-10 05:08:16,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3546 GetRequests, 3457 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2411 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1444, Invalid=6746, Unknown=0, NotChecked=0, Total=8190 [2018-11-10 05:08:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-11-10 05:08:16,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 224. [2018-11-10 05:08:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-11-10 05:08:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 372 transitions. [2018-11-10 05:08:16,599 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 372 transitions. Word has length 3459 [2018-11-10 05:08:16,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:08:16,599 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 372 transitions. [2018-11-10 05:08:16,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-10 05:08:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 372 transitions. [2018-11-10 05:08:16,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5135 [2018-11-10 05:08:16,694 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:08:16,695 INFO L375 BasicCegarLoop]: trace histogram [753, 753, 609, 376, 376, 376, 376, 376, 376, 376, 233, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:08:16,695 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:08:16,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:08:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1603623985, now seen corresponding path program 12 times [2018-11-10 05:08:16,695 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:08:16,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:08:16,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:08:16,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:08:16,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:08:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:08:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1599648 backedges. 30437 proven. 15510 refuted. 0 times theorem prover too weak. 1553701 trivial. 0 not checked. [2018-11-10 05:08:24,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:08:24,235 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/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 05:08:24,240 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-10 05:08:24,452 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-11-10 05:08:24,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:08:24,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:08:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1599648 backedges. 10254 proven. 39943 refuted. 0 times theorem prover too weak. 1549451 trivial. 0 not checked. [2018-11-10 05:08:30,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:08:30,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2018-11-10 05:08:30,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 05:08:30,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 05:08:30,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-11-10 05:08:30,476 INFO L87 Difference]: Start difference. First operand 224 states and 372 transitions. Second operand 17 states. [2018-11-10 05:08:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:08:30,656 INFO L93 Difference]: Finished difference Result 233 states and 401 transitions. [2018-11-10 05:08:30,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 05:08:30,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 5134 [2018-11-10 05:08:30,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:08:30,663 INFO L225 Difference]: With dead ends: 233 [2018-11-10 05:08:30,663 INFO L226 Difference]: Without dead ends: 229 [2018-11-10 05:08:30,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5171 GetRequests, 5143 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-11-10 05:08:30,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-11-10 05:08:30,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-11-10 05:08:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-11-10 05:08:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 391 transitions. [2018-11-10 05:08:30,680 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 391 transitions. Word has length 5134 [2018-11-10 05:08:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:08:30,680 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 391 transitions. [2018-11-10 05:08:30,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 05:08:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 391 transitions. [2018-11-10 05:08:30,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8771 [2018-11-10 05:08:30,935 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:08:30,936 INFO L375 BasicCegarLoop]: trace histogram [1287, 1287, 1041, 643, 643, 643, 643, 643, 643, 643, 398, 246, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:08:30,936 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:08:30,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:08:30,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1316778824, now seen corresponding path program 13 times [2018-11-10 05:08:30,937 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:08:30,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:08:30,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:08:30,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:08:30,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:08:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:08:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4677096 backedges. 58258 proven. 28093 refuted. 0 times theorem prover too weak. 4590745 trivial. 0 not checked. [2018-11-10 05:08:49,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:08:49,907 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:08:49,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:08:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:08:51,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:09:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4677096 backedges. 9828 proven. 91192 refuted. 0 times theorem prover too weak. 4576076 trivial. 0 not checked. [2018-11-10 05:09:08,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:09:08,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 18 [2018-11-10 05:09:08,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 05:09:08,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 05:09:08,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-11-10 05:09:08,506 INFO L87 Difference]: Start difference. First operand 229 states and 391 transitions. Second operand 18 states. [2018-11-10 05:09:08,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:09:08,708 INFO L93 Difference]: Finished difference Result 238 states and 422 transitions. [2018-11-10 05:09:08,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 05:09:08,709 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 8770 [2018-11-10 05:09:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:09:08,715 INFO L225 Difference]: With dead ends: 238 [2018-11-10 05:09:08,715 INFO L226 Difference]: Without dead ends: 234 [2018-11-10 05:09:08,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8810 GetRequests, 8780 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-11-10 05:09:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-11-10 05:09:08,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-11-10 05:09:08,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-11-10 05:09:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 412 transitions. [2018-11-10 05:09:08,733 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 412 transitions. Word has length 8770 [2018-11-10 05:09:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:09:08,734 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 412 transitions. [2018-11-10 05:09:08,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 05:09:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 412 transitions. [2018-11-10 05:09:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20183 [2018-11-10 05:09:09,964 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:09:09,966 INFO L375 BasicCegarLoop]: trace histogram [2963, 2963, 2397, 1481, 1481, 1481, 1481, 1481, 1481, 1481, 916, 566, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:09:09,966 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:09:09,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:09:09,967 INFO L82 PathProgramCache]: Analyzing trace with hash -440406644, now seen corresponding path program 14 times [2018-11-10 05:09:09,967 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:09:09,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:09:09,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:09:09,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:09:09,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:09:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:10:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24808178 backedges. 159217 proven. 80649 refuted. 0 times theorem prover too weak. 24568312 trivial. 0 not checked. [2018-11-10 05:10:46,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:10:46,765 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:10:46,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:10:50,222 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:10:50,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:10:50,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:12:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 24808178 backedges. 82585 proven. 157268 refuted. 0 times theorem prover too weak. 24568325 trivial. 0 not checked. [2018-11-10 05:12:19,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:12:19,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 23 [2018-11-10 05:12:19,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-10 05:12:19,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-10 05:12:19,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2018-11-10 05:12:19,661 INFO L87 Difference]: Start difference. First operand 234 states and 412 transitions. Second operand 23 states. [2018-11-10 05:12:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:12:19,900 INFO L93 Difference]: Finished difference Result 331 states and 970 transitions. [2018-11-10 05:12:19,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-10 05:12:19,901 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20182 [2018-11-10 05:12:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:12:19,911 INFO L225 Difference]: With dead ends: 331 [2018-11-10 05:12:19,911 INFO L226 Difference]: Without dead ends: 234 [2018-11-10 05:12:19,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20228 GetRequests, 20192 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=466, Invalid=866, Unknown=0, NotChecked=0, Total=1332 [2018-11-10 05:12:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-11-10 05:12:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-11-10 05:12:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-11-10 05:12:19,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 288 transitions. [2018-11-10 05:12:19,923 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 288 transitions. Word has length 20182 [2018-11-10 05:12:19,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:12:19,925 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 288 transitions. [2018-11-10 05:12:19,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-10 05:12:19,925 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 288 transitions. [2018-11-10 05:12:20,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13442 [2018-11-10 05:12:20,469 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:12:20,471 INFO L375 BasicCegarLoop]: trace histogram [1973, 1973, 1596, 986, 986, 986, 986, 986, 986, 986, 610, 377, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:12:20,471 INFO L424 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:12:20,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:12:20,472 INFO L82 PathProgramCache]: Analyzing trace with hash -982105371, now seen corresponding path program 15 times [2018-11-10 05:12:20,472 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:12:20,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:12:20,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:12:20,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:12:20,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:12:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:14:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10996742 backedges. 0 proven. 3626247 refuted. 0 times theorem prover too weak. 7370495 trivial. 0 not checked. [2018-11-10 05:14:21,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:14:21,289 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:14:21,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 05:19:45,098 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1640 check-sat command(s) [2018-11-10 05:19:45,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:19:45,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:21:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10996742 backedges. 0 proven. 3626247 refuted. 0 times theorem prover too weak. 7370495 trivial. 0 not checked. [2018-11-10 05:21:30,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:21:30,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 60 [2018-11-10 05:21:30,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-11-10 05:21:30,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-11-10 05:21:30,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2018-11-10 05:21:30,990 INFO L87 Difference]: Start difference. First operand 234 states and 288 transitions. Second operand 60 states. [2018-11-10 05:21:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:21:31,684 INFO L93 Difference]: Finished difference Result 234 states and 288 transitions. [2018-11-10 05:21:31,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-10 05:21:31,684 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 13441 [2018-11-10 05:21:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:21:31,692 INFO L225 Difference]: With dead ends: 234 [2018-11-10 05:21:31,692 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 05:21:31,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17389 GetRequests, 16344 SyntacticMatches, 987 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2018-11-10 05:21:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 05:21:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 05:21:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 05:21:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 05:21:31,694 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13441 [2018-11-10 05:21:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:21:31,695 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 05:21:31,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-11-10 05:21:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 05:21:31,695 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 05:21:31,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 05:21:33,577 WARN L179 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 254 DAG size of output: 123 [2018-11-10 05:21:33,795 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 8 [2018-11-10 05:21:33,797 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-10 05:21:33,797 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 05:21:33,797 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 05:21:33,797 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 05:21:33,797 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 05:21:33,797 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 05:21:33,797 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-11-10 05:21:33,797 INFO L425 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-11-10 05:21:33,797 INFO L425 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-11-10 05:21:33,797 INFO L421 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= 15 main_~x~0) (<= main_~x~0 15)) [2018-11-10 05:21:33,798 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-11-10 05:21:33,798 INFO L425 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-11-10 05:21:33,798 INFO L425 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-11-10 05:21:33,798 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-11-10 05:21:33,798 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-11-10 05:21:33,798 INFO L425 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-11-10 05:21:33,798 INFO L425 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-11-10 05:21:33,798 INFO L421 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2018-11-10 05:21:33,798 INFO L425 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-10 05:21:33,799 INFO L421 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse17 (<= 7 |fibo_#in~n|)) (.cse14 (<= |fibo_#in~n| 6)) (.cse15 (<= 6 |fibo_#in~n|)) (.cse12 (<= |fibo_#in~n| 5)) (.cse13 (<= 5 fibo_~n)) (.cse6 (<= fibo_~n |fibo_#in~n|)) (.cse16 (<= |fibo_#in~n| fibo_~n)) (.cse18 (<= |fibo_#in~n| 10))) (let ((.cse0 (< |fibo_#in~n| 8)) (.cse8 (<= fibo_~n 4)) (.cse2 (and (<= |fibo_#in~n| 11) (<= 11 |fibo_#in~n|))) (.cse3 (and (<= 10 |fibo_#in~n|) .cse18)) (.cse1 (and (<= 9 |fibo_#in~n|) .cse16 (<= fibo_~n 9))) (.cse9 (and .cse6 .cse16 (<= |fibo_#in~n| 12) (<= 12 |fibo_#in~n|))) (.cse4 (and .cse6 .cse16 (<= 13 |fibo_#in~n|))) (.cse11 (and .cse6 .cse12 .cse13)) (.cse5 (and (<= |fibo_#in~n| 8) (<= 8 |fibo_#in~n|) .cse6 .cse16)) (.cse7 (and .cse14 .cse6 .cse16 .cse15)) (.cse10 (and .cse17 .cse6 .cse16 (<= |fibo_#in~n| 7)))) (and (or (and (<= 89 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 89)) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (or (and (<= 233 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 233)) (<= 15 |fibo_#in~n|) (<= |fibo_#in~n| 13)) .cse6 (or .cse7 .cse8 .cse1 (and (<= 34 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 34)) .cse9 .cse2 .cse10 .cse4 .cse5 .cse11) (or .cse0 .cse1 .cse9 .cse2 .cse3 (and (<= |fibo_#t~ret0| 144) (<= 144 |fibo_#t~ret0|)) (<= 14 |fibo_#in~n|) .cse5) (or (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) .cse12 .cse13) (and (<= |fibo_#t~ret0| 5) .cse14 (<= 5 |fibo_#t~ret0|) .cse15) (and (<= 4 |fibo_#in~n|) .cse8 .cse16 (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) .cse1 .cse9 .cse2 (and .cse17 (<= |fibo_#t~ret0| 8) (<= 8 |fibo_#t~ret0|)) .cse3 .cse4 .cse5 (and .cse16 (<= |fibo_#t~ret0| 1) (<= |fibo_#in~n| 3) (<= 1 |fibo_#t~ret0|))) (or .cse7 (and (<= 10 fibo_~n) .cse18) (and (<= 55 |fibo_#t~ret0|) .cse16 (<= |fibo_#t~ret0| 55)) .cse1 .cse9 (< |fibo_#in~n| 5) .cse10 .cse4 .cse5 .cse11) (or (<= 16 |fibo_#in~n|) (<= |fibo_#in~n| 14) (and (<= 377 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 377))) (or (< |fibo_#in~n| 7) (and (<= |fibo_#t~ret0| 21) (<= 21 |fibo_#t~ret0|)) .cse10 (< 9 |fibo_#in~n|) .cse5) (< 1 fibo_~n) (or .cse7 (and (<= 13 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 13)) .cse10 (< 8 |fibo_#in~n|) (< |fibo_#in~n| 6))))) [2018-11-10 05:21:33,799 INFO L425 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-11-10 05:21:33,799 INFO L425 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-11-10 05:21:33,799 INFO L425 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-11-10 05:21:33,799 INFO L428 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-11-10 05:21:33,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 05:21:33 BoogieIcfgContainer [2018-11-10 05:21:33,801 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 05:21:33,801 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 05:21:33,801 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 05:21:33,801 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 05:21:33,802 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:07:52" (3/4) ... [2018-11-10 05:21:33,804 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 05:21:33,809 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 05:21:33,809 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 05:21:33,809 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-11-10 05:21:33,812 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-10 05:21:33,812 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-10 05:21:33,812 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-10 05:21:33,840 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7cbe9fda-9952-44c4-a62d-f53414206c9d/bin-2019/uautomizer/witness.graphml [2018-11-10 05:21:33,840 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 05:21:33,840 INFO L168 Benchmark]: Toolchain (without parser) took 821785.83 ms. Allocated memory was 1.0 GB in the beginning and 6.1 GB in the end (delta: 5.1 GB). Free memory was 956.5 MB in the beginning and 2.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 3.3 GB. Max. memory is 11.5 GB. [2018-11-10 05:21:33,841 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:21:33,841 INFO L168 Benchmark]: CACSL2BoogieTranslator took 134.71 ms. Allocated memory is still 1.0 GB. Free memory was 956.5 MB in the beginning and 945.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 05:21:33,841 INFO L168 Benchmark]: Boogie Preprocessor took 22.37 ms. Allocated memory is still 1.0 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:21:33,842 INFO L168 Benchmark]: RCFGBuilder took 245.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 169.3 MB). Free memory was 945.7 MB in the beginning and 1.2 GB in the end (delta: -206.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2018-11-10 05:21:33,842 INFO L168 Benchmark]: TraceAbstraction took 821341.81 ms. Allocated memory was 1.2 GB in the beginning and 6.1 GB in the end (delta: 4.9 GB). Free memory was 1.2 GB in the beginning and 2.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 3.3 GB. Max. memory is 11.5 GB. [2018-11-10 05:21:33,842 INFO L168 Benchmark]: Witness Printer took 38.69 ms. Allocated memory is still 6.1 GB. Free memory is still 2.8 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:21:33,843 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 134.71 ms. Allocated memory is still 1.0 GB. Free memory was 956.5 MB in the beginning and 945.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.37 ms. Allocated memory is still 1.0 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 245.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 169.3 MB). Free memory was 945.7 MB in the beginning and 1.2 GB in the end (delta: -206.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 821341.81 ms. Allocated memory was 1.2 GB in the beginning and 6.1 GB in the end (delta: 4.9 GB). Free memory was 1.2 GB in the beginning and 2.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 3.3 GB. Max. memory is 11.5 GB. * Witness Printer took 38.69 ms. Allocated memory is still 6.1 GB. Free memory is still 2.8 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 821.2s OverallTime, 18 OverallIterations, 2963 TraceHistogramMax, 5.4s AutomataDifference, 0.0s DeadEndRemovalTime, 2.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 486 SDtfs, 1085 SDslu, 4182 SDs, 0 SdLazy, 6773 SolverSat, 1532 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61517 GetRequests, 60005 SyntacticMatches, 989 SemanticMatches, 523 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6960 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=234occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 98 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 425 PreInvPairs, 1066 NumberOfFragments, 597 HoareAnnotationTreeSize, 425 FomulaSimplifications, 6757 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 13766 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 336.2s SatisfiabilityAnalysisTime, 258.4s InterpolantComputationTime, 114143 NumberOfCodeBlocks, 106981 NumberOfCodeBlocksAsserted, 2130 NumberOfCheckSat, 114109 ConstructedInterpolants, 0 QuantifiedInterpolants, 2690790803 SizeOfPredicates, 140 NumberOfNonLiveVariables, 110483 ConjunctsInSsa, 8176 ConjunctsInUnsatCore, 34 InterpolantComputations, 2 PerfectInterpolantSequences, 79063991/86811976 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...