./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 dd317ac0ecdb37853dacea373914a521115465e0 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 17:22:08,164 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 17:22:08,165 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 17:22:08,174 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 17:22:08,174 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 17:22:08,175 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 17:22:08,176 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 17:22:08,177 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 17:22:08,178 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 17:22:08,179 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 17:22:08,180 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 17:22:08,180 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 17:22:08,180 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 17:22:08,181 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 17:22:08,182 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 17:22:08,182 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 17:22:08,183 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 17:22:08,184 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 17:22:08,186 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 17:22:08,187 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 17:22:08,187 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 17:22:08,188 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 17:22:08,190 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 17:22:08,190 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 17:22:08,190 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 17:22:08,191 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 17:22:08,191 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 17:22:08,192 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 17:22:08,193 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 17:22:08,193 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 17:22:08,193 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 17:22:08,194 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 17:22:08,194 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 17:22:08,194 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 17:22:08,195 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 17:22:08,195 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 17:22:08,196 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 17:22:08,206 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 17:22:08,206 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 17:22:08,206 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 17:22:08,206 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 17:22:08,207 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 17:22:08,207 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 17:22:08,207 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 17:22:08,207 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 17:22:08,208 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 17:22:08,208 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 17:22:08,208 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 17:22:08,208 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 17:22:08,208 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 17:22:08,208 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 17:22:08,208 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 17:22:08,208 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 17:22:08,209 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 17:22:08,209 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 17:22:08,209 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 17:22:08,209 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 17:22:08,209 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 17:22:08,209 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 17:22:08,209 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 17:22:08,210 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 17:22:08,210 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 17:22:08,210 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 17:22:08,210 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 17:22:08,210 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 17:22:08,210 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 17:22:08,210 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 17:22:08,211 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_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 -> dd317ac0ecdb37853dacea373914a521115465e0 [2018-11-18 17:22:08,236 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 17:22:08,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 17:22:08,247 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 17:22:08,248 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 17:22:08,249 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 17:22:08,249 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-11-18 17:22:08,283 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/bin-2019/uautomizer/data/5d8b14ad0/93ac7ae10a904375a02a555ba094c7ad/FLAG08ced8481 [2018-11-18 17:22:08,693 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 17:22:08,694 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-11-18 17:22:08,697 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/bin-2019/uautomizer/data/5d8b14ad0/93ac7ae10a904375a02a555ba094c7ad/FLAG08ced8481 [2018-11-18 17:22:08,705 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/bin-2019/uautomizer/data/5d8b14ad0/93ac7ae10a904375a02a555ba094c7ad [2018-11-18 17:22:08,707 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 17:22:08,708 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 17:22:08,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 17:22:08,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 17:22:08,712 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 17:22:08,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:22:08" (1/1) ... [2018-11-18 17:22:08,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f35898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:22:08, skipping insertion in model container [2018-11-18 17:22:08,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 05:22:08" (1/1) ... [2018-11-18 17:22:08,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 17:22:08,731 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 17:22:08,828 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:22:08,830 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 17:22:08,839 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 17:22:08,846 INFO L195 MainTranslator]: Completed translation [2018-11-18 17:22:08,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:22:08 WrapperNode [2018-11-18 17:22:08,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 17:22:08,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 17:22:08,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 17:22:08,847 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 17:22:08,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:22:08" (1/1) ... [2018-11-18 17:22:08,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:22:08" (1/1) ... [2018-11-18 17:22:08,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:22:08" (1/1) ... [2018-11-18 17:22:08,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:22:08" (1/1) ... [2018-11-18 17:22:08,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:22:08" (1/1) ... [2018-11-18 17:22:08,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:22:08" (1/1) ... [2018-11-18 17:22:08,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:22:08" (1/1) ... [2018-11-18 17:22:08,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 17:22:08,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 17:22:08,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 17:22:08,862 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 17:22:08,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:22:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 [2018-11-18 17:22:08,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 17:22:08,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 17:22:08,936 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-18 17:22:08,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 17:22:08,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 17:22:08,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 17:22:08,936 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-18 17:22:08,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 17:22:08,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 17:22:08,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 17:22:09,024 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 17:22:09,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:22:09 BoogieIcfgContainer [2018-11-18 17:22:09,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 17:22:09,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 17:22:09,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 17:22:09,028 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 17:22:09,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 05:22:08" (1/3) ... [2018-11-18 17:22:09,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc54b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 05:22:09, skipping insertion in model container [2018-11-18 17:22:09,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 05:22:08" (2/3) ... [2018-11-18 17:22:09,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc54b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 05:22:09, skipping insertion in model container [2018-11-18 17:22:09,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:22:09" (3/3) ... [2018-11-18 17:22:09,030 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_10_true-unreach-call_true-termination.c [2018-11-18 17:22:09,036 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 17:22:09,040 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 17:22:09,048 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 17:22:09,066 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 17:22:09,067 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 17:22:09,067 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 17:22:09,067 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 17:22:09,067 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 17:22:09,067 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 17:22:09,067 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 17:22:09,067 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 17:22:09,067 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 17:22:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-18 17:22:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 17:22:09,082 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:09,082 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:22:09,084 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:09,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:09,087 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-11-18 17:22:09,088 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:09,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:09,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:09,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:22:09,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:22:09,197 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:22:09,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 17:22:09,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 17:22:09,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 17:22:09,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 17:22:09,211 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-18 17:22:09,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:09,277 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-18 17:22:09,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 17:22:09,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 17:22:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:09,284 INFO L225 Difference]: With dead ends: 35 [2018-11-18 17:22:09,284 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 17:22:09,286 INFO L604 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 [2018-11-18 17:22:09,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 17:22:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 17:22:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 17:22:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-18 17:22:09,313 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-18 17:22:09,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:09,313 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-18 17:22:09,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 17:22:09,314 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-18 17:22:09,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 17:22:09,314 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:09,314 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:22:09,315 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:09,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:09,315 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-11-18 17:22:09,315 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:09,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:09,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:09,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:22:09,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 17:22:09,339 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 17:22:09,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 17:22:09,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 17:22:09,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 17:22:09,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 17:22:09,342 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-18 17:22:09,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:09,422 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-18 17:22:09,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 17:22:09,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-18 17:22:09,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:09,423 INFO L225 Difference]: With dead ends: 27 [2018-11-18 17:22:09,423 INFO L226 Difference]: Without dead ends: 23 [2018-11-18 17:22:09,424 INFO L604 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 [2018-11-18 17:22:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-18 17:22:09,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-18 17:22:09,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 17:22:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-18 17:22:09,429 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-18 17:22:09,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:09,430 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-18 17:22:09,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 17:22:09,430 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-18 17:22:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-18 17:22:09,431 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:09,433 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] [2018-11-18 17:22:09,433 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:09,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:09,433 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-11-18 17:22:09,433 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:09,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:09,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:09,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:22:09,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 17:22:09,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:22:09,511 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 [2018-11-18 17:22:09,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:22:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:09,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:22:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 17:22:09,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:22:09,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-18 17:22:09,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 17:22:09,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 17:22:09,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-18 17:22:09,604 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-18 17:22:09,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:09,722 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-18 17:22:09,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 17:22:09,723 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-18 17:22:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:09,724 INFO L225 Difference]: With dead ends: 38 [2018-11-18 17:22:09,724 INFO L226 Difference]: Without dead ends: 23 [2018-11-18 17:22:09,724 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-18 17:22:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-18 17:22:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-18 17:22:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 17:22:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-18 17:22:09,729 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-18 17:22:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:09,729 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-18 17:22:09,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 17:22:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-18 17:22:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 17:22:09,731 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:09,731 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] [2018-11-18 17:22:09,731 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:09,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:09,731 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-11-18 17:22:09,731 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:09,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:09,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:09,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:22:09,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 17:22:09,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:22:09,768 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 [2018-11-18 17:22:09,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:22:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:09,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:22:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 17:22:09,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:22:09,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-18 17:22:09,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 17:22:09,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 17:22:09,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 17:22:09,823 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-18 17:22:09,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:09,865 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-18 17:22:09,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 17:22:09,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-18 17:22:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:09,867 INFO L225 Difference]: With dead ends: 32 [2018-11-18 17:22:09,867 INFO L226 Difference]: Without dead ends: 28 [2018-11-18 17:22:09,868 INFO L604 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 [2018-11-18 17:22:09,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-18 17:22:09,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-18 17:22:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 17:22:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-18 17:22:09,874 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-18 17:22:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:09,874 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-18 17:22:09,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 17:22:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-18 17:22:09,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-18 17:22:09,875 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:09,875 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] [2018-11-18 17:22:09,875 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:09,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:09,876 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-11-18 17:22:09,876 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:09,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:09,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:09,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:22:09,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 17:22:09,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:22:09,943 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 [2018-11-18 17:22:09,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 17:22:09,985 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 17:22:09,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:22:09,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:22:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-18 17:22:10,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:22:10,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-11-18 17:22:10,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 17:22:10,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 17:22:10,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-18 17:22:10,040 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-11-18 17:22:10,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:10,099 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-11-18 17:22:10,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 17:22:10,100 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-18 17:22:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:10,101 INFO L225 Difference]: With dead ends: 40 [2018-11-18 17:22:10,101 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 17:22:10,101 INFO L604 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 [2018-11-18 17:22:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 17:22:10,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-18 17:22:10,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 17:22:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-18 17:22:10,106 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-18 17:22:10,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:10,107 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-18 17:22:10,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 17:22:10,107 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-18 17:22:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-18 17:22:10,109 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:10,109 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] [2018-11-18 17:22:10,110 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:10,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:10,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-11-18 17:22:10,110 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:10,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:10,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:10,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:22:10,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-18 17:22:10,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:22:10,250 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 [2018-11-18 17:22:10,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 17:22:10,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-18 17:22:10,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:22:10,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:22:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-18 17:22:10,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:22:10,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-18 17:22:10,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 17:22:10,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 17:22:10,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-18 17:22:10,325 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-11-18 17:22:10,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:10,507 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-11-18 17:22:10,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 17:22:10,507 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-11-18 17:22:10,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:10,509 INFO L225 Difference]: With dead ends: 76 [2018-11-18 17:22:10,509 INFO L226 Difference]: Without dead ends: 49 [2018-11-18 17:22:10,510 INFO L604 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 [2018-11-18 17:22:10,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-18 17:22:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-11-18 17:22:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-18 17:22:10,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-11-18 17:22:10,516 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-11-18 17:22:10,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:10,517 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-11-18 17:22:10,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 17:22:10,517 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-11-18 17:22:10,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-18 17:22:10,518 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:10,518 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:22:10,518 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:10,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:10,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 4 times [2018-11-18 17:22:10,519 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:10,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:10,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:10,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:22:10,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-18 17:22:10,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:22:10,571 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 [2018-11-18 17:22:10,585 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 17:22:10,598 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 17:22:10,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:22:10,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:22:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-18 17:22:10,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:22:10,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2018-11-18 17:22:10,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 17:22:10,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 17:22:10,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-18 17:22:10,640 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 8 states. [2018-11-18 17:22:10,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:10,717 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2018-11-18 17:22:10,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 17:22:10,718 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2018-11-18 17:22:10,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:10,719 INFO L225 Difference]: With dead ends: 52 [2018-11-18 17:22:10,719 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 17:22:10,720 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-18 17:22:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 17:22:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-18 17:22:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 17:22:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2018-11-18 17:22:10,727 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 68 [2018-11-18 17:22:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:10,728 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2018-11-18 17:22:10,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 17:22:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2018-11-18 17:22:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-18 17:22:10,730 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:10,730 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:22:10,731 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:10,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2018-11-18 17:22:10,731 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:10,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:10,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:10,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:22:10,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 76 proven. 241 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-11-18 17:22:10,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:22:10,845 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 [2018-11-18 17:22:10,852 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 17:22:10,898 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-18 17:22:10,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:22:10,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:22:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 336 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2018-11-18 17:22:11,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:22:11,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 14 [2018-11-18 17:22:11,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 17:22:11,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 17:22:11,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-11-18 17:22:11,004 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand 14 states. [2018-11-18 17:22:11,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:11,244 INFO L93 Difference]: Finished difference Result 118 states and 229 transitions. [2018-11-18 17:22:11,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 17:22:11,244 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 136 [2018-11-18 17:22:11,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:11,246 INFO L225 Difference]: With dead ends: 118 [2018-11-18 17:22:11,246 INFO L226 Difference]: Without dead ends: 72 [2018-11-18 17:22:11,248 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2018-11-18 17:22:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-18 17:22:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2018-11-18 17:22:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-11-18 17:22:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2018-11-18 17:22:11,256 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 136 [2018-11-18 17:22:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:11,256 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2018-11-18 17:22:11,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 17:22:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2018-11-18 17:22:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-11-18 17:22:11,258 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:11,259 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:22:11,259 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:11,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash -509498553, now seen corresponding path program 6 times [2018-11-18 17:22:11,259 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:11,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:11,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:11,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:22:11,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 669 proven. 122 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2018-11-18 17:22:11,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:22:11,398 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 [2018-11-18 17:22:11,405 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 17:22:11,454 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-11-18 17:22:11,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:22:11,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:22:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 236 proven. 396 refuted. 0 times theorem prover too weak. 1609 trivial. 0 not checked. [2018-11-18 17:22:11,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:22:11,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2018-11-18 17:22:11,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 17:22:11,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 17:22:11,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-11-18 17:22:11,560 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 18 states. [2018-11-18 17:22:12,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:12,050 INFO L93 Difference]: Finished difference Result 163 states and 256 transitions. [2018-11-18 17:22:12,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-18 17:22:12,051 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 204 [2018-11-18 17:22:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:12,053 INFO L225 Difference]: With dead ends: 163 [2018-11-18 17:22:12,053 INFO L226 Difference]: Without dead ends: 97 [2018-11-18 17:22:12,054 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=422, Invalid=1470, Unknown=0, NotChecked=0, Total=1892 [2018-11-18 17:22:12,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-11-18 17:22:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2018-11-18 17:22:12,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-18 17:22:12,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2018-11-18 17:22:12,064 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 204 [2018-11-18 17:22:12,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:12,065 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2018-11-18 17:22:12,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 17:22:12,065 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2018-11-18 17:22:12,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-11-18 17:22:12,070 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:12,070 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:22:12,071 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:12,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:12,071 INFO L82 PathProgramCache]: Analyzing trace with hash 223191898, now seen corresponding path program 7 times [2018-11-18 17:22:12,071 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:12,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:12,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:12,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:22:12,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 248 proven. 1232 refuted. 0 times theorem prover too weak. 5640 trivial. 0 not checked. [2018-11-18 17:22:12,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:22:12,244 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 [2018-11-18 17:22:12,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:22:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:12,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:22:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 214 proven. 1491 refuted. 0 times theorem prover too weak. 5415 trivial. 0 not checked. [2018-11-18 17:22:12,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:22:12,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2018-11-18 17:22:12,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 17:22:12,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 17:22:12,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-18 17:22:12,385 INFO L87 Difference]: Start difference. First operand 87 states and 116 transitions. Second operand 11 states. [2018-11-18 17:22:12,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:12,501 INFO L93 Difference]: Finished difference Result 99 states and 144 transitions. [2018-11-18 17:22:12,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 17:22:12,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 354 [2018-11-18 17:22:12,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:12,503 INFO L225 Difference]: With dead ends: 99 [2018-11-18 17:22:12,503 INFO L226 Difference]: Without dead ends: 95 [2018-11-18 17:22:12,503 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-18 17:22:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-18 17:22:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2018-11-18 17:22:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-18 17:22:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 129 transitions. [2018-11-18 17:22:12,512 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 129 transitions. Word has length 354 [2018-11-18 17:22:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:12,513 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 129 transitions. [2018-11-18 17:22:12,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 17:22:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 129 transitions. [2018-11-18 17:22:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-11-18 17:22:12,520 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:12,520 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 62, 38, 38, 38, 38, 38, 38, 38, 24, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:22:12,520 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:12,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:12,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1339067037, now seen corresponding path program 8 times [2018-11-18 17:22:12,521 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:12,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:12,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:12,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 17:22:12,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 425 proven. 2285 refuted. 0 times theorem prover too weak. 13697 trivial. 0 not checked. [2018-11-18 17:22:12,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:22:12,722 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 [2018-11-18 17:22:12,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 17:22:12,823 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 17:22:12,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:22:12,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:22:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 386 proven. 2689 refuted. 0 times theorem prover too weak. 13332 trivial. 0 not checked. [2018-11-18 17:22:12,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:22:12,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2018-11-18 17:22:12,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 17:22:12,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 17:22:12,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-18 17:22:12,959 INFO L87 Difference]: Start difference. First operand 92 states and 129 transitions. Second operand 12 states. [2018-11-18 17:22:13,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:13,069 INFO L93 Difference]: Finished difference Result 101 states and 150 transitions. [2018-11-18 17:22:13,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 17:22:13,070 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 531 [2018-11-18 17:22:13,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:13,071 INFO L225 Difference]: With dead ends: 101 [2018-11-18 17:22:13,071 INFO L226 Difference]: Without dead ends: 97 [2018-11-18 17:22:13,072 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-18 17:22:13,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-11-18 17:22:13,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-11-18 17:22:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-18 17:22:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 144 transitions. [2018-11-18 17:22:13,080 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 144 transitions. Word has length 531 [2018-11-18 17:22:13,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:13,081 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 144 transitions. [2018-11-18 17:22:13,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 17:22:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 144 transitions. [2018-11-18 17:22:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1063 [2018-11-18 17:22:13,088 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:13,089 INFO L375 BasicCegarLoop]: trace histogram [155, 155, 125, 77, 77, 77, 77, 77, 77, 77, 48, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:22:13,089 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:13,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:13,089 INFO L82 PathProgramCache]: Analyzing trace with hash -413582866, now seen corresponding path program 9 times [2018-11-18 17:22:13,089 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:13,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:13,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:13,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:22:13,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 853 proven. 5690 refuted. 0 times theorem prover too weak. 60651 trivial. 0 not checked. [2018-11-18 17:22:13,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:22:13,606 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 [2018-11-18 17:22:13,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 17:22:13,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2018-11-18 17:22:13,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:22:13,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:22:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 6400 proven. 296 refuted. 0 times theorem prover too weak. 60498 trivial. 0 not checked. [2018-11-18 17:22:14,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:22:14,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2018-11-18 17:22:14,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-18 17:22:14,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-18 17:22:14,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2018-11-18 17:22:14,182 INFO L87 Difference]: Start difference. First operand 97 states and 144 transitions. Second operand 19 states. [2018-11-18 17:22:14,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:14,727 INFO L93 Difference]: Finished difference Result 239 states and 448 transitions. [2018-11-18 17:22:14,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-18 17:22:14,728 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1062 [2018-11-18 17:22:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:14,730 INFO L225 Difference]: With dead ends: 239 [2018-11-18 17:22:14,730 INFO L226 Difference]: Without dead ends: 151 [2018-11-18 17:22:14,731 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=687, Invalid=2505, Unknown=0, NotChecked=0, Total=3192 [2018-11-18 17:22:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-11-18 17:22:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 135. [2018-11-18 17:22:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-11-18 17:22:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 190 transitions. [2018-11-18 17:22:14,741 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 190 transitions. Word has length 1062 [2018-11-18 17:22:14,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:14,742 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 190 transitions. [2018-11-18 17:22:14,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-18 17:22:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 190 transitions. [2018-11-18 17:22:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1567 [2018-11-18 17:22:14,751 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:14,752 INFO L375 BasicCegarLoop]: trace histogram [229, 229, 185, 114, 114, 114, 114, 114, 114, 114, 71, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:22:14,752 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:14,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:14,752 INFO L82 PathProgramCache]: Analyzing trace with hash 395085911, now seen corresponding path program 10 times [2018-11-18 17:22:14,752 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:14,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:14,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:14,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:22:14,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 147208 backedges. 6878 proven. 4630 refuted. 0 times theorem prover too weak. 135700 trivial. 0 not checked. [2018-11-18 17:22:15,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:22:15,663 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 [2018-11-18 17:22:15,669 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 17:22:15,855 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 17:22:15,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:22:15,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:22:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 147208 backedges. 6890 proven. 4610 refuted. 0 times theorem prover too weak. 135708 trivial. 0 not checked. [2018-11-18 17:22:16,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:22:16,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2018-11-18 17:22:16,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 17:22:16,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 17:22:16,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2018-11-18 17:22:16,702 INFO L87 Difference]: Start difference. First operand 135 states and 190 transitions. Second operand 17 states. [2018-11-18 17:22:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:16,857 INFO L93 Difference]: Finished difference Result 199 states and 333 transitions. [2018-11-18 17:22:16,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 17:22:16,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1566 [2018-11-18 17:22:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:16,862 INFO L225 Difference]: With dead ends: 199 [2018-11-18 17:22:16,862 INFO L226 Difference]: Without dead ends: 177 [2018-11-18 17:22:16,863 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1596 GetRequests, 1572 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2018-11-18 17:22:16,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-11-18 17:22:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-11-18 17:22:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-11-18 17:22:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 253 transitions. [2018-11-18 17:22:16,875 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 253 transitions. Word has length 1566 [2018-11-18 17:22:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:16,877 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 253 transitions. [2018-11-18 17:22:16,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 17:22:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 253 transitions. [2018-11-18 17:22:16,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1254 [2018-11-18 17:22:16,888 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:16,889 INFO L375 BasicCegarLoop]: trace histogram [183, 183, 148, 91, 91, 91, 91, 91, 91, 91, 57, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:22:16,889 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:16,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:16,889 INFO L82 PathProgramCache]: Analyzing trace with hash -987904872, now seen corresponding path program 11 times [2018-11-18 17:22:16,889 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:16,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:16,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:16,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:22:16,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 93870 backedges. 1521 proven. 8541 refuted. 0 times theorem prover too weak. 83808 trivial. 0 not checked. [2018-11-18 17:22:17,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:22:17,536 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 [2018-11-18 17:22:17,541 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 17:22:18,029 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 125 check-sat command(s) [2018-11-18 17:22:18,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:22:18,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:22:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 93870 backedges. 21320 proven. 123 refuted. 0 times theorem prover too weak. 72427 trivial. 0 not checked. [2018-11-18 17:22:18,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:22:18,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 22 [2018-11-18 17:22:18,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-18 17:22:18,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-18 17:22:18,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2018-11-18 17:22:18,632 INFO L87 Difference]: Start difference. First operand 177 states and 253 transitions. Second operand 22 states. [2018-11-18 17:22:19,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:19,002 INFO L93 Difference]: Finished difference Result 334 states and 640 transitions. [2018-11-18 17:22:19,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-18 17:22:19,003 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1253 [2018-11-18 17:22:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:19,004 INFO L225 Difference]: With dead ends: 334 [2018-11-18 17:22:19,004 INFO L226 Difference]: Without dead ends: 158 [2018-11-18 17:22:19,006 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1293 GetRequests, 1257 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 17:22:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-11-18 17:22:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 127. [2018-11-18 17:22:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-11-18 17:22:19,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2018-11-18 17:22:19,013 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 1253 [2018-11-18 17:22:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:19,013 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2018-11-18 17:22:19,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-18 17:22:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2018-11-18 17:22:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2018-11-18 17:22:19,020 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 17:22:19,020 INFO L375 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 17:22:19,021 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 17:22:19,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 17:22:19,021 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 12 times [2018-11-18 17:22:19,021 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 17:22:19,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 17:22:19,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:19,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 17:22:19,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 17:22:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 17:22:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-11-18 17:22:20,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 17:22:20,516 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/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 [2018-11-18 17:22:20,522 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 17:22:21,147 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 144 check-sat command(s) [2018-11-18 17:22:21,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 17:22:21,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 17:22:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-11-18 17:22:22,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 17:22:22,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 40 [2018-11-18 17:22:22,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-18 17:22:22,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-18 17:22:22,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-11-18 17:22:22,697 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand 40 states. [2018-11-18 17:22:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 17:22:22,981 INFO L93 Difference]: Finished difference Result 127 states and 147 transitions. [2018-11-18 17:22:22,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-18 17:22:22,982 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1212 [2018-11-18 17:22:22,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 17:22:22,983 INFO L225 Difference]: With dead ends: 127 [2018-11-18 17:22:22,983 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 17:22:22,984 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1440 SyntacticMatches, 90 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-11-18 17:22:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 17:22:22,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 17:22:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 17:22:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 17:22:22,984 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1212 [2018-11-18 17:22:22,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 17:22:22,985 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 17:22:22,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-18 17:22:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 17:22:22,985 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 17:22:22,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 17:22:23,986 WARN L180 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 70 [2018-11-18 17:22:24,169 WARN L180 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 8 [2018-11-18 17:22:24,171 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 17:22:24,171 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 17:22:24,171 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 17:22:24,171 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 17:22:24,172 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 17:22:24,172 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 17:22:24,172 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-11-18 17:22:24,172 INFO L425 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-11-18 17:22:24,172 INFO L425 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-11-18 17:22:24,172 INFO L421 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 10) (<= 10 main_~x~0)) [2018-11-18 17:22:24,172 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-11-18 17:22:24,172 INFO L425 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-11-18 17:22:24,172 INFO L425 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-11-18 17:22:24,172 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-11-18 17:22:24,172 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-11-18 17:22:24,172 INFO L425 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-11-18 17:22:24,172 INFO L425 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-11-18 17:22:24,173 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)) [2018-11-18 17:22:24,173 INFO L425 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-18 17:22:24,173 INFO L421 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse2 (<= fibo_~n |fibo_#in~n|))) (let ((.cse1 (<= 6 |fibo_#in~n|)) (.cse0 (and .cse2 (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) (<= fibo_~n 5) (<= 5 fibo_~n)))) (and (or (<= 9 |fibo_#in~n|) (< |fibo_#in~n| 8) (and (<= 13 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 13))) (or (and (<= |fibo_#t~ret0| 8) (<= 8 |fibo_#t~ret0|) (<= 7 fibo_~n)) (and (<= 4 |fibo_#in~n|) (<= |fibo_#in~n| 5) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) (and (<= |fibo_#t~ret0| 1) (<= |fibo_#in~n| 3) (<= 1 |fibo_#t~ret0|)) (<= 8 |fibo_#in~n|) .cse0 (and (<= |fibo_#t~ret0| 5) (<= |fibo_#in~n| 6) (<= 5 |fibo_#t~ret0|) .cse1)) (or (<= |fibo_#in~n| 9) (<= 11 |fibo_#in~n|) (and (<= 34 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 34))) .cse2 (let ((.cse3 (<= |fibo_#in~n| fibo_~n))) (or (and (<= |fibo_#in~n| 8) .cse3) (and (<= |fibo_#t~ret0| 21) (<= 21 |fibo_#t~ret0|) .cse3) (and (<= 10 |fibo_#in~n|) .cse3))) (< 1 fibo_~n) (or .cse1 (< |fibo_#in~n| 5) .cse0)))) [2018-11-18 17:22:24,173 INFO L425 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-11-18 17:22:24,173 INFO L425 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-11-18 17:22:24,173 INFO L425 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-11-18 17:22:24,173 INFO L428 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-11-18 17:22:24,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 05:22:24 BoogieIcfgContainer [2018-11-18 17:22:24,175 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 17:22:24,176 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 17:22:24,176 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 17:22:24,176 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 17:22:24,176 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 05:22:09" (3/4) ... [2018-11-18 17:22:24,179 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 17:22:24,185 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 17:22:24,185 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 17:22:24,185 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-11-18 17:22:24,188 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 17:22:24,188 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 17:22:24,188 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 17:22:24,223 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7fe00e8c-38c0-4311-8c01-7dc62cee696d/bin-2019/uautomizer/witness.graphml [2018-11-18 17:22:24,223 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 17:22:24,224 INFO L168 Benchmark]: Toolchain (without parser) took 15516.28 ms. Allocated memory was 1.0 GB in the beginning and 3.3 GB in the end (delta: 2.2 GB). Free memory was 958.0 MB in the beginning and 2.0 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.2 GB. Max. memory is 11.5 GB. [2018-11-18 17:22:24,225 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:22:24,225 INFO L168 Benchmark]: CACSL2BoogieTranslator took 138.15 ms. Allocated memory is still 1.0 GB. Free memory was 958.0 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 17:22:24,225 INFO L168 Benchmark]: Boogie Preprocessor took 14.90 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:22:24,225 INFO L168 Benchmark]: RCFGBuilder took 162.80 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -134.7 MB). Peak memory consumption was 16.6 MB. Max. memory is 11.5 GB. [2018-11-18 17:22:24,226 INFO L168 Benchmark]: TraceAbstraction took 15149.75 ms. Allocated memory was 1.1 GB in the beginning and 3.3 GB in the end (delta: 2.1 GB). Free memory was 1.1 GB in the beginning and 2.0 GB in the end (delta: -911.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 11.5 GB. [2018-11-18 17:22:24,226 INFO L168 Benchmark]: Witness Printer took 47.76 ms. Allocated memory is still 3.3 GB. Free memory is still 2.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 17:22:24,228 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 138.15 ms. Allocated memory is still 1.0 GB. Free memory was 958.0 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.90 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 162.80 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -134.7 MB). Peak memory consumption was 16.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15149.75 ms. Allocated memory was 1.1 GB in the beginning and 3.3 GB in the end (delta: 2.1 GB). Free memory was 1.1 GB in the beginning and 2.0 GB in the end (delta: -911.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 11.5 GB. * Witness Printer took 47.76 ms. Allocated memory is still 3.3 GB. Free memory is still 2.0 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, 15.1s OverallTime, 15 OverallIterations, 229 TraceHistogramMax, 3.0s AutomataDifference, 0.0s DeadEndRemovalTime, 1.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 391 SDtfs, 619 SDslu, 2360 SDs, 0 SdLazy, 3395 SolverSat, 787 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7240 GetRequests, 6832 SyntacticMatches, 92 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=177occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 73 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 296 PreInvPairs, 584 NumberOfFragments, 175 HoareAnnotationTreeSize, 296 FomulaSimplifications, 3579 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 6523 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 13177 NumberOfCodeBlocks, 11823 NumberOfCodeBlocksAsserted, 358 NumberOfCheckSat, 13149 ConstructedInterpolants, 0 QuantifiedInterpolants, 25578539 SizeOfPredicates, 75 NumberOfNonLiveVariables, 11423 ConjunctsInSsa, 860 ConjunctsInUnsatCore, 28 InterpolantComputations, 2 PerfectInterpolantSequences, 756128/846860 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...