./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 cd6d4490a7412402195d3193de0347508566f7c8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 12:32:37,483 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 12:32:37,484 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 12:32:37,490 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 12:32:37,490 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 12:32:37,490 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 12:32:37,491 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 12:32:37,492 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 12:32:37,492 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 12:32:37,493 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 12:32:37,493 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 12:32:37,493 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 12:32:37,494 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 12:32:37,494 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 12:32:37,495 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 12:32:37,495 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 12:32:37,495 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 12:32:37,496 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 12:32:37,497 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 12:32:37,498 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 12:32:37,498 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 12:32:37,499 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 12:32:37,500 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 12:32:37,500 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 12:32:37,500 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 12:32:37,500 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 12:32:37,501 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 12:32:37,501 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 12:32:37,502 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 12:32:37,502 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 12:32:37,502 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 12:32:37,503 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 12:32:37,503 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 12:32:37,503 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 12:32:37,503 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 12:32:37,504 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 12:32:37,504 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-09 12:32:37,511 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 12:32:37,511 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 12:32:37,511 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 12:32:37,511 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 12:32:37,512 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 12:32:37,512 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 12:32:37,512 INFO L133 SettingsManager]: * Use SBE=true [2018-12-09 12:32:37,512 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 12:32:37,512 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 12:32:37,512 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 12:32:37,512 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 12:32:37,512 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 12:32:37,512 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 12:32:37,512 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 12:32:37,512 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 12:32:37,513 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 12:32:37,513 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 12:32:37,513 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 12:32:37,513 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 12:32:37,513 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 12:32:37,513 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 12:32:37,513 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 12:32:37,513 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 12:32:37,513 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 12:32:37,513 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 12:32:37,513 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 12:32:37,514 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 12:32:37,514 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-09 12:32:37,514 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 12:32:37,514 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 12:32:37,514 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_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 -> cd6d4490a7412402195d3193de0347508566f7c8 [2018-12-09 12:32:37,531 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 12:32:37,539 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 12:32:37,541 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 12:32:37,542 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 12:32:37,542 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 12:32:37,542 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c [2018-12-09 12:32:37,578 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/data/b70d4d754/2664163ca0464def9807a9b0a515a187/FLAGe8a2920c1 [2018-12-09 12:32:37,849 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 12:32:37,849 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/sv-benchmarks/c/recursive-simple/fibo_2calls_8_true-unreach-call_true-termination.c [2018-12-09 12:32:37,853 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/data/b70d4d754/2664163ca0464def9807a9b0a515a187/FLAGe8a2920c1 [2018-12-09 12:32:37,861 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/data/b70d4d754/2664163ca0464def9807a9b0a515a187 [2018-12-09 12:32:37,863 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 12:32:37,864 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 12:32:37,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 12:32:37,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 12:32:37,866 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 12:32:37,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:32:37" (1/1) ... [2018-12-09 12:32:37,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59facd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:32:37, skipping insertion in model container [2018-12-09 12:32:37,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:32:37" (1/1) ... [2018-12-09 12:32:37,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 12:32:37,881 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 12:32:37,964 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 12:32:37,966 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 12:32:37,975 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 12:32:37,983 INFO L195 MainTranslator]: Completed translation [2018-12-09 12:32:37,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:32:37 WrapperNode [2018-12-09 12:32:37,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 12:32:37,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 12:32:37,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 12:32:37,984 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 12:32:37,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:32:37" (1/1) ... [2018-12-09 12:32:37,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:32:37" (1/1) ... [2018-12-09 12:32:37,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 12:32:37,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 12:32:37,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 12:32:37,996 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 12:32:38,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:32:37" (1/1) ... [2018-12-09 12:32:38,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:32:37" (1/1) ... [2018-12-09 12:32:38,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:32:37" (1/1) ... [2018-12-09 12:32:38,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:32:37" (1/1) ... [2018-12-09 12:32:38,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:32:37" (1/1) ... [2018-12-09 12:32:38,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:32:37" (1/1) ... [2018-12-09 12:32:38,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:32:37" (1/1) ... [2018-12-09 12:32:38,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 12:32:38,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 12:32:38,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 12:32:38,006 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 12:32:38,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:32:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 [2018-12-09 12:32:38,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 12:32:38,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 12:32:38,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 12:32:38,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 12:32:38,067 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 12:32:38,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 12:32:38,067 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-12-09 12:32:38,067 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-12-09 12:32:38,067 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-12-09 12:32:38,067 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-12-09 12:32:38,164 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 12:32:38,164 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-09 12:32:38,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:32:38 BoogieIcfgContainer [2018-12-09 12:32:38,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 12:32:38,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 12:32:38,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 12:32:38,167 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 12:32:38,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:32:37" (1/3) ... [2018-12-09 12:32:38,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c19f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:32:38, skipping insertion in model container [2018-12-09 12:32:38,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:32:37" (2/3) ... [2018-12-09 12:32:38,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c19f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:32:38, skipping insertion in model container [2018-12-09 12:32:38,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:32:38" (3/3) ... [2018-12-09 12:32:38,169 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8_true-unreach-call_true-termination.c [2018-12-09 12:32:38,175 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 12:32:38,181 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 12:32:38,193 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 12:32:38,218 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 12:32:38,219 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 12:32:38,219 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 12:32:38,219 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 12:32:38,219 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 12:32:38,219 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 12:32:38,219 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 12:32:38,220 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 12:32:38,220 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 12:32:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-12-09 12:32:38,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 12:32:38,240 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:38,240 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:38,242 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:38,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:38,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-12-09 12:32:38,247 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:38,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:38,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:38,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:38,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:32:38,341 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 12:32:38,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 12:32:38,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 12:32:38,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 12:32:38,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 12:32:38,353 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-12-09 12:32:38,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:38,403 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-12-09 12:32:38,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 12:32:38,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-09 12:32:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:38,410 INFO L225 Difference]: With dead ends: 44 [2018-12-09 12:32:38,410 INFO L226 Difference]: Without dead ends: 30 [2018-12-09 12:32:38,412 INFO L631 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 [2018-12-09 12:32:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-09 12:32:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-09 12:32:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-09 12:32:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-09 12:32:38,437 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-12-09 12:32:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:38,437 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-09 12:32:38,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 12:32:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-09 12:32:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 12:32:38,438 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:38,438 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:38,438 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:38,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:38,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-12-09 12:32:38,439 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:38,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:38,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:38,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:38,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 12:32:38,469 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 12:32:38,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 12:32:38,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 12:32:38,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 12:32:38,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 12:32:38,470 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-12-09 12:32:38,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:38,515 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-12-09 12:32:38,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 12:32:38,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-09 12:32:38,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:38,516 INFO L225 Difference]: With dead ends: 36 [2018-12-09 12:32:38,516 INFO L226 Difference]: Without dead ends: 32 [2018-12-09 12:32:38,517 INFO L631 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 [2018-12-09 12:32:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-09 12:32:38,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-09 12:32:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-09 12:32:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-09 12:32:38,521 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-12-09 12:32:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:38,522 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-09 12:32:38,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 12:32:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-09 12:32:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-09 12:32:38,523 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:38,523 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:38,523 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:38,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:38,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-12-09 12:32:38,524 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:38,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:38,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:38,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:38,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 12:32:38,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:38,571 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 [2018-12-09 12:32:38,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:38,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 12:32:38,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:38,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-12-09 12:32:38,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 12:32:38,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 12:32:38,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-09 12:32:38,667 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-12-09 12:32:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:38,771 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-12-09 12:32:38,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 12:32:38,771 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-12-09 12:32:38,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:38,772 INFO L225 Difference]: With dead ends: 58 [2018-12-09 12:32:38,772 INFO L226 Difference]: Without dead ends: 34 [2018-12-09 12:32:38,773 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-12-09 12:32:38,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-09 12:32:38,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-12-09 12:32:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-09 12:32:38,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-12-09 12:32:38,779 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-12-09 12:32:38,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:38,779 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-12-09 12:32:38,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 12:32:38,779 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-12-09 12:32:38,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-09 12:32:38,780 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:38,780 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:38,780 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:38,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:38,781 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-12-09 12:32:38,781 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:38,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:38,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:38,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:38,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 12:32:38,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:38,831 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 [2018-12-09 12:32:38,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:38,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 12:32:38,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:38,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-09 12:32:38,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 12:32:38,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 12:32:38,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-09 12:32:38,865 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-12-09 12:32:38,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:38,915 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-12-09 12:32:38,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 12:32:38,916 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-12-09 12:32:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:38,916 INFO L225 Difference]: With dead ends: 43 [2018-12-09 12:32:38,916 INFO L226 Difference]: Without dead ends: 39 [2018-12-09 12:32:38,917 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-12-09 12:32:38,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-09 12:32:38,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-12-09 12:32:38,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-09 12:32:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-12-09 12:32:38,921 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-12-09 12:32:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:38,921 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-12-09 12:32:38,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 12:32:38,921 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-12-09 12:32:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-09 12:32:38,922 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:38,922 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:38,922 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:38,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:38,923 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-12-09 12:32:38,923 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:38,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:38,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:38,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:38,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 12:32:38,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:38,964 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 [2018-12-09 12:32:38,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:38,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-09 12:32:39,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:39,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-12-09 12:32:39,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 12:32:39,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 12:32:39,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-12-09 12:32:39,028 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-12-09 12:32:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:39,142 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-12-09 12:32:39,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 12:32:39,142 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-12-09 12:32:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:39,143 INFO L225 Difference]: With dead ends: 70 [2018-12-09 12:32:39,143 INFO L226 Difference]: Without dead ends: 39 [2018-12-09 12:32:39,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-12-09 12:32:39,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-09 12:32:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-09 12:32:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-09 12:32:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-12-09 12:32:39,148 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-12-09 12:32:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:39,148 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-12-09 12:32:39,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 12:32:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-12-09 12:32:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-09 12:32:39,149 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:39,149 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:39,149 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:39,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:39,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-12-09 12:32:39,149 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:39,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:39,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:39,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:39,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 12:32:39,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:39,189 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 [2018-12-09 12:32:39,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:39,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-09 12:32:39,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:39,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-12-09 12:32:39,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 12:32:39,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 12:32:39,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-09 12:32:39,247 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-12-09 12:32:39,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:39,338 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-12-09 12:32:39,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 12:32:39,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-12-09 12:32:39,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:39,339 INFO L225 Difference]: With dead ends: 61 [2018-12-09 12:32:39,339 INFO L226 Difference]: Without dead ends: 57 [2018-12-09 12:32:39,340 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-12-09 12:32:39,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-09 12:32:39,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-12-09 12:32:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-09 12:32:39,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-12-09 12:32:39,345 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-12-09 12:32:39,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:39,346 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-12-09 12:32:39,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 12:32:39,346 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-12-09 12:32:39,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-12-09 12:32:39,347 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:39,347 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:39,347 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:39,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:39,347 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-12-09 12:32:39,347 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:39,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:39,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:39,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:39,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-09 12:32:39,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:39,387 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 [2018-12-09 12:32:39,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:39,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-12-09 12:32:39,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:39,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-12-09 12:32:39,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 12:32:39,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 12:32:39,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-09 12:32:39,451 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-12-09 12:32:39,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:39,529 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-12-09 12:32:39,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 12:32:39,529 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-12-09 12:32:39,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:39,530 INFO L225 Difference]: With dead ends: 71 [2018-12-09 12:32:39,530 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 12:32:39,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-12-09 12:32:39,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 12:32:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-12-09 12:32:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-09 12:32:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-12-09 12:32:39,540 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-12-09 12:32:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:39,540 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-12-09 12:32:39,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 12:32:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-12-09 12:32:39,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-12-09 12:32:39,542 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:39,542 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:39,542 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:39,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:39,543 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-12-09 12:32:39,543 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:39,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:39,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:39,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:39,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-12-09 12:32:39,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:39,615 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 [2018-12-09 12:32:39,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 12:32:39,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 12:32:39,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:32:39,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-12-09 12:32:39,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:39,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2018-12-09 12:32:39,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-09 12:32:39,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-09 12:32:39,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-12-09 12:32:39,715 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 16 states. [2018-12-09 12:32:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:40,029 INFO L93 Difference]: Finished difference Result 146 states and 299 transitions. [2018-12-09 12:32:40,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-09 12:32:40,029 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2018-12-09 12:32:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:40,031 INFO L225 Difference]: With dead ends: 146 [2018-12-09 12:32:40,031 INFO L226 Difference]: Without dead ends: 103 [2018-12-09 12:32:40,032 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2018-12-09 12:32:40,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-09 12:32:40,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2018-12-09 12:32:40,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-12-09 12:32:40,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 157 transitions. [2018-12-09 12:32:40,046 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 157 transitions. Word has length 80 [2018-12-09 12:32:40,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:40,047 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 157 transitions. [2018-12-09 12:32:40,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-09 12:32:40,047 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 157 transitions. [2018-12-09 12:32:40,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-12-09 12:32:40,050 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:40,050 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:40,050 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:40,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:40,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2012686571, now seen corresponding path program 2 times [2018-12-09 12:32:40,050 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:40,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:40,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:40,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:32:40,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 78 proven. 181 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2018-12-09 12:32:40,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:40,166 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 [2018-12-09 12:32:40,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 12:32:40,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 12:32:40,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:32:40,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 41 proven. 262 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2018-12-09 12:32:40,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:40,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2018-12-09 12:32:40,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-09 12:32:40,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-09 12:32:40,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-12-09 12:32:40,310 INFO L87 Difference]: Start difference. First operand 87 states and 157 transitions. Second operand 18 states. [2018-12-09 12:32:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:40,749 INFO L93 Difference]: Finished difference Result 232 states and 520 transitions. [2018-12-09 12:32:40,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-09 12:32:40,749 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 175 [2018-12-09 12:32:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:40,751 INFO L225 Difference]: With dead ends: 232 [2018-12-09 12:32:40,751 INFO L226 Difference]: Without dead ends: 129 [2018-12-09 12:32:40,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2018-12-09 12:32:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-12-09 12:32:40,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 118. [2018-12-09 12:32:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-12-09 12:32:40,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 184 transitions. [2018-12-09 12:32:40,763 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 184 transitions. Word has length 175 [2018-12-09 12:32:40,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:40,764 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 184 transitions. [2018-12-09 12:32:40,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-09 12:32:40,764 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 184 transitions. [2018-12-09 12:32:40,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-12-09 12:32:40,767 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:40,767 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 16, 16, 16, 14, 12, 12, 12, 12, 12, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:40,767 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:40,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:40,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1802867089, now seen corresponding path program 1 times [2018-12-09 12:32:40,767 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:40,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:40,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:40,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:32:40,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 134 proven. 374 refuted. 0 times theorem prover too weak. 1759 trivial. 0 not checked. [2018-12-09 12:32:40,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:40,871 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 [2018-12-09 12:32:40,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:40,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 88 proven. 564 refuted. 0 times theorem prover too weak. 1615 trivial. 0 not checked. [2018-12-09 12:32:41,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:41,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 18 [2018-12-09 12:32:41,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-09 12:32:41,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-09 12:32:41,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-12-09 12:32:41,096 INFO L87 Difference]: Start difference. First operand 118 states and 184 transitions. Second operand 18 states. [2018-12-09 12:32:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:41,509 INFO L93 Difference]: Finished difference Result 290 states and 587 transitions. [2018-12-09 12:32:41,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-09 12:32:41,509 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 283 [2018-12-09 12:32:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:41,510 INFO L225 Difference]: With dead ends: 290 [2018-12-09 12:32:41,511 INFO L226 Difference]: Without dead ends: 179 [2018-12-09 12:32:41,512 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2018-12-09 12:32:41,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-12-09 12:32:41,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 154. [2018-12-09 12:32:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-12-09 12:32:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 252 transitions. [2018-12-09 12:32:41,521 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 252 transitions. Word has length 283 [2018-12-09 12:32:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:41,522 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 252 transitions. [2018-12-09 12:32:41,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-09 12:32:41,522 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 252 transitions. [2018-12-09 12:32:41,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2018-12-09 12:32:41,530 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:41,530 INFO L402 BasicCegarLoop]: trace histogram [53, 53, 42, 42, 41, 38, 26, 26, 26, 26, 26, 26, 26, 21, 21, 21, 21, 21, 21, 21, 20, 12, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:41,530 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:41,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:41,531 INFO L82 PathProgramCache]: Analyzing trace with hash -785737282, now seen corresponding path program 1 times [2018-12-09 12:32:41,531 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:41,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:41,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:41,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:41,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12619 backedges. 377 proven. 917 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2018-12-09 12:32:41,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:41,790 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 [2018-12-09 12:32:41,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:41,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12619 backedges. 272 proven. 1180 refuted. 0 times theorem prover too weak. 11167 trivial. 0 not checked. [2018-12-09 12:32:42,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:42,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-12-09 12:32:42,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-09 12:32:42,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-09 12:32:42,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2018-12-09 12:32:42,082 INFO L87 Difference]: Start difference. First operand 154 states and 252 transitions. Second operand 19 states. [2018-12-09 12:32:42,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:42,560 INFO L93 Difference]: Finished difference Result 415 states and 873 transitions. [2018-12-09 12:32:42,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-12-09 12:32:42,560 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 656 [2018-12-09 12:32:42,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:42,564 INFO L225 Difference]: With dead ends: 415 [2018-12-09 12:32:42,564 INFO L226 Difference]: Without dead ends: 260 [2018-12-09 12:32:42,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2018-12-09 12:32:42,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-12-09 12:32:42,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 201. [2018-12-09 12:32:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-12-09 12:32:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 378 transitions. [2018-12-09 12:32:42,589 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 378 transitions. Word has length 656 [2018-12-09 12:32:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:42,590 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 378 transitions. [2018-12-09 12:32:42,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-09 12:32:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 378 transitions. [2018-12-09 12:32:42,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 871 [2018-12-09 12:32:42,600 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:42,600 INFO L402 BasicCegarLoop]: trace histogram [69, 69, 58, 58, 51, 50, 34, 34, 34, 34, 34, 34, 34, 29, 29, 29, 29, 29, 29, 29, 22, 18, 16, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:42,601 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:42,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:42,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1261881714, now seen corresponding path program 2 times [2018-12-09 12:32:42,601 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:42,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:42,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:42,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:42,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22364 backedges. 1448 proven. 982 refuted. 0 times theorem prover too weak. 19934 trivial. 0 not checked. [2018-12-09 12:32:42,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:42,991 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 [2018-12-09 12:32:42,997 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 12:32:43,122 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 12:32:43,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:32:43,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 22364 backedges. 529 proven. 1898 refuted. 0 times theorem prover too weak. 19937 trivial. 0 not checked. [2018-12-09 12:32:43,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:43,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2018-12-09 12:32:43,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-09 12:32:43,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-09 12:32:43,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2018-12-09 12:32:43,403 INFO L87 Difference]: Start difference. First operand 201 states and 378 transitions. Second operand 18 states. [2018-12-09 12:32:43,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:43,617 INFO L93 Difference]: Finished difference Result 294 states and 627 transitions. [2018-12-09 12:32:43,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 12:32:43,617 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 870 [2018-12-09 12:32:43,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:43,621 INFO L225 Difference]: With dead ends: 294 [2018-12-09 12:32:43,621 INFO L226 Difference]: Without dead ends: 168 [2018-12-09 12:32:43,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 871 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2018-12-09 12:32:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-12-09 12:32:43,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-12-09 12:32:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-12-09 12:32:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 262 transitions. [2018-12-09 12:32:43,637 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 262 transitions. Word has length 870 [2018-12-09 12:32:43,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:43,637 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 262 transitions. [2018-12-09 12:32:43,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-09 12:32:43,637 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 262 transitions. [2018-12-09 12:32:43,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-12-09 12:32:43,640 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:43,640 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 24, 24, 22, 21, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 10, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:43,640 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:43,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:43,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1979610045, now seen corresponding path program 3 times [2018-12-09 12:32:43,640 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:43,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:43,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:43,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:32:43,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 620 proven. 190 refuted. 0 times theorem prover too weak. 2987 trivial. 0 not checked. [2018-12-09 12:32:43,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:43,793 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 [2018-12-09 12:32:43,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 12:32:43,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-09 12:32:43,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:32:43,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 1544 proven. 31 refuted. 0 times theorem prover too weak. 2222 trivial. 0 not checked. [2018-12-09 12:32:43,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:43,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2018-12-09 12:32:43,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-09 12:32:43,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-09 12:32:43,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2018-12-09 12:32:43,944 INFO L87 Difference]: Start difference. First operand 168 states and 262 transitions. Second operand 20 states. [2018-12-09 12:32:44,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:44,291 INFO L93 Difference]: Finished difference Result 398 states and 716 transitions. [2018-12-09 12:32:44,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-09 12:32:44,291 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 368 [2018-12-09 12:32:44,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:44,294 INFO L225 Difference]: With dead ends: 398 [2018-12-09 12:32:44,294 INFO L226 Difference]: Without dead ends: 235 [2018-12-09 12:32:44,295 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2018-12-09 12:32:44,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-12-09 12:32:44,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 219. [2018-12-09 12:32:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-12-09 12:32:44,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 350 transitions. [2018-12-09 12:32:44,307 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 350 transitions. Word has length 368 [2018-12-09 12:32:44,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:44,307 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 350 transitions. [2018-12-09 12:32:44,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-09 12:32:44,307 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 350 transitions. [2018-12-09 12:32:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-12-09 12:32:44,309 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:44,309 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 22, 22, 20, 18, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 9, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:44,310 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:44,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:44,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1086306760, now seen corresponding path program 4 times [2018-12-09 12:32:44,310 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:44,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:44,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:44,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:32:44,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2951 backedges. 426 proven. 141 refuted. 0 times theorem prover too weak. 2384 trivial. 0 not checked. [2018-12-09 12:32:44,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:44,434 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 [2018-12-09 12:32:44,440 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 12:32:44,472 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 12:32:44,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:32:44,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2951 backedges. 241 proven. 424 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2018-12-09 12:32:44,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:44,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 14 [2018-12-09 12:32:44,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-09 12:32:44,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-09 12:32:44,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-12-09 12:32:44,579 INFO L87 Difference]: Start difference. First operand 219 states and 350 transitions. Second operand 14 states. [2018-12-09 12:32:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:44,709 INFO L93 Difference]: Finished difference Result 246 states and 395 transitions. [2018-12-09 12:32:44,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-09 12:32:44,710 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 327 [2018-12-09 12:32:44,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:44,711 INFO L225 Difference]: With dead ends: 246 [2018-12-09 12:32:44,711 INFO L226 Difference]: Without dead ends: 229 [2018-12-09 12:32:44,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2018-12-09 12:32:44,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-12-09 12:32:44,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 219. [2018-12-09 12:32:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-12-09 12:32:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 335 transitions. [2018-12-09 12:32:44,722 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 335 transitions. Word has length 327 [2018-12-09 12:32:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:44,722 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 335 transitions. [2018-12-09 12:32:44,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-09 12:32:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 335 transitions. [2018-12-09 12:32:44,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2018-12-09 12:32:44,725 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:44,725 INFO L402 BasicCegarLoop]: trace histogram [41, 41, 34, 34, 31, 30, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 13, 11, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:44,725 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:44,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:44,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1694691762, now seen corresponding path program 5 times [2018-12-09 12:32:44,725 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:44,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:44,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:44,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:32:44,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 360 proven. 420 refuted. 0 times theorem prover too weak. 6948 trivial. 0 not checked. [2018-12-09 12:32:44,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:44,882 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/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 [2018-12-09 12:32:44,888 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-09 12:32:44,914 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-12-09 12:32:44,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:32:44,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 2944 proven. 18 refuted. 0 times theorem prover too weak. 4766 trivial. 0 not checked. [2018-12-09 12:32:45,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:45,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 13 [2018-12-09 12:32:45,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 12:32:45,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 12:32:45,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-12-09 12:32:45,043 INFO L87 Difference]: Start difference. First operand 219 states and 335 transitions. Second operand 13 states. [2018-12-09 12:32:45,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:45,191 INFO L93 Difference]: Finished difference Result 368 states and 581 transitions. [2018-12-09 12:32:45,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-09 12:32:45,191 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 518 [2018-12-09 12:32:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:45,192 INFO L225 Difference]: With dead ends: 368 [2018-12-09 12:32:45,192 INFO L226 Difference]: Without dead ends: 158 [2018-12-09 12:32:45,193 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2018-12-09 12:32:45,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-12-09 12:32:45,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2018-12-09 12:32:45,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-12-09 12:32:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2018-12-09 12:32:45,199 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 518 [2018-12-09 12:32:45,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:45,199 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2018-12-09 12:32:45,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 12:32:45,199 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2018-12-09 12:32:45,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-12-09 12:32:45,200 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:45,201 INFO L402 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 25, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:45,201 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:45,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:45,201 INFO L82 PathProgramCache]: Analyzing trace with hash 933744578, now seen corresponding path program 6 times [2018-12-09 12:32:45,201 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:45,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:45,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:45,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:32:45,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 591 proven. 444 refuted. 0 times theorem prover too weak. 4317 trivial. 0 not checked. [2018-12-09 12:32:45,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:45,335 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:32:45,341 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-09 12:32:45,399 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-12-09 12:32:45,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:32:45,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 2106 proven. 33 refuted. 0 times theorem prover too weak. 3213 trivial. 0 not checked. [2018-12-09 12:32:45,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:45,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2018-12-09 12:32:45,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 12:32:45,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 12:32:45,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-12-09 12:32:45,494 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand 17 states. [2018-12-09 12:32:45,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:45,752 INFO L93 Difference]: Finished difference Result 330 states and 456 transitions. [2018-12-09 12:32:45,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-09 12:32:45,752 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 435 [2018-12-09 12:32:45,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:45,754 INFO L225 Difference]: With dead ends: 330 [2018-12-09 12:32:45,754 INFO L226 Difference]: Without dead ends: 180 [2018-12-09 12:32:45,755 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2018-12-09 12:32:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-12-09 12:32:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 162. [2018-12-09 12:32:45,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-12-09 12:32:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 207 transitions. [2018-12-09 12:32:45,768 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 207 transitions. Word has length 435 [2018-12-09 12:32:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:45,768 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 207 transitions. [2018-12-09 12:32:45,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 12:32:45,768 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 207 transitions. [2018-12-09 12:32:45,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2018-12-09 12:32:45,772 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:45,772 INFO L402 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:45,772 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:45,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:45,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 7 times [2018-12-09 12:32:45,773 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:45,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:45,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:45,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:32:45,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2018-12-09 12:32:46,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:46,577 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:32:46,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:46,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2018-12-09 12:32:47,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:47,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 52 [2018-12-09 12:32:47,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-12-09 12:32:47,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-12-09 12:32:47,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2018-12-09 12:32:47,305 INFO L87 Difference]: Start difference. First operand 162 states and 207 transitions. Second operand 52 states. [2018-12-09 12:32:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:47,795 INFO L93 Difference]: Finished difference Result 183 states and 231 transitions. [2018-12-09 12:32:47,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-12-09 12:32:47,795 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 463 [2018-12-09 12:32:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:47,796 INFO L225 Difference]: With dead ends: 183 [2018-12-09 12:32:47,797 INFO L226 Difference]: Without dead ends: 176 [2018-12-09 12:32:47,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 514 SyntacticMatches, 35 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2018-12-09 12:32:47,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-12-09 12:32:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2018-12-09 12:32:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-12-09 12:32:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 223 transitions. [2018-12-09 12:32:47,804 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 223 transitions. Word has length 463 [2018-12-09 12:32:47,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:47,805 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 223 transitions. [2018-12-09 12:32:47,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-12-09 12:32:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 223 transitions. [2018-12-09 12:32:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-12-09 12:32:47,806 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:47,806 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:47,807 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:47,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:47,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1740376526, now seen corresponding path program 8 times [2018-12-09 12:32:47,807 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:47,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:47,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:47,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 12:32:47,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 1090 proven. 156 refuted. 0 times theorem prover too weak. 4123 trivial. 0 not checked. [2018-12-09 12:32:47,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:47,963 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:32:47,970 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 12:32:48,020 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 12:32:48,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:32:48,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 663 proven. 113 refuted. 0 times theorem prover too weak. 4593 trivial. 0 not checked. [2018-12-09 12:32:48,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:48,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 20 [2018-12-09 12:32:48,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-09 12:32:48,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-09 12:32:48,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-12-09 12:32:48,110 INFO L87 Difference]: Start difference. First operand 175 states and 223 transitions. Second operand 20 states. [2018-12-09 12:32:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:48,568 INFO L93 Difference]: Finished difference Result 372 states and 505 transitions. [2018-12-09 12:32:48,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-12-09 12:32:48,568 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 436 [2018-12-09 12:32:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:48,569 INFO L225 Difference]: With dead ends: 372 [2018-12-09 12:32:48,569 INFO L226 Difference]: Without dead ends: 205 [2018-12-09 12:32:48,570 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2018-12-09 12:32:48,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-12-09 12:32:48,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 183. [2018-12-09 12:32:48,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-12-09 12:32:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 231 transitions. [2018-12-09 12:32:48,577 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 231 transitions. Word has length 436 [2018-12-09 12:32:48,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:48,578 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 231 transitions. [2018-12-09 12:32:48,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-09 12:32:48,578 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 231 transitions. [2018-12-09 12:32:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-12-09 12:32:48,579 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:48,579 INFO L402 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 30, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:48,580 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:48,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:48,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1638954211, now seen corresponding path program 9 times [2018-12-09 12:32:48,580 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:48,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:48,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:48,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:32:48,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1313 proven. 334 refuted. 0 times theorem prover too weak. 5614 trivial. 0 not checked. [2018-12-09 12:32:48,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:48,829 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:32:48,836 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 12:32:48,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-12-09 12:32:48,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:32:48,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1201 proven. 210 refuted. 0 times theorem prover too weak. 5850 trivial. 0 not checked. [2018-12-09 12:32:49,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:49,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 22 [2018-12-09 12:32:49,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-09 12:32:49,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-09 12:32:49,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2018-12-09 12:32:49,026 INFO L87 Difference]: Start difference. First operand 183 states and 231 transitions. Second operand 22 states. [2018-12-09 12:32:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:49,543 INFO L93 Difference]: Finished difference Result 364 states and 476 transitions. [2018-12-09 12:32:49,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-09 12:32:49,543 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 504 [2018-12-09 12:32:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:49,544 INFO L225 Difference]: With dead ends: 364 [2018-12-09 12:32:49,544 INFO L226 Difference]: Without dead ends: 169 [2018-12-09 12:32:49,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=401, Invalid=2251, Unknown=0, NotChecked=0, Total=2652 [2018-12-09 12:32:49,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-12-09 12:32:49,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 158. [2018-12-09 12:32:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-12-09 12:32:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 184 transitions. [2018-12-09 12:32:49,552 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 184 transitions. Word has length 504 [2018-12-09 12:32:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:49,552 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 184 transitions. [2018-12-09 12:32:49,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-09 12:32:49,552 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 184 transitions. [2018-12-09 12:32:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-12-09 12:32:49,553 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 12:32:49,553 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 37, 37, 31, 31, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 13, 11, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 12:32:49,554 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 12:32:49,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 12:32:49,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1112347357, now seen corresponding path program 10 times [2018-12-09 12:32:49,554 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 12:32:49,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 12:32:49,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:49,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 12:32:49,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 12:32:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 12:32:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8086 backedges. 314 proven. 1279 refuted. 0 times theorem prover too weak. 6493 trivial. 0 not checked. [2018-12-09 12:32:49,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 12:32:49,736 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 12:32:49,741 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 12:32:49,798 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 12:32:49,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 12:32:49,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 12:32:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8086 backedges. 320 proven. 1270 refuted. 0 times theorem prover too weak. 6496 trivial. 0 not checked. [2018-12-09 12:32:49,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 12:32:49,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2018-12-09 12:32:49,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 12:32:49,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 12:32:49,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2018-12-09 12:32:49,951 INFO L87 Difference]: Start difference. First operand 158 states and 184 transitions. Second operand 17 states. [2018-12-09 12:32:50,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 12:32:50,099 INFO L93 Difference]: Finished difference Result 158 states and 184 transitions. [2018-12-09 12:32:50,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-09 12:32:50,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 531 [2018-12-09 12:32:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 12:32:50,100 INFO L225 Difference]: With dead ends: 158 [2018-12-09 12:32:50,100 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 12:32:50,100 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 535 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2018-12-09 12:32:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 12:32:50,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 12:32:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 12:32:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 12:32:50,101 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 531 [2018-12-09 12:32:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 12:32:50,101 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 12:32:50,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 12:32:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 12:32:50,101 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 12:32:50,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 12:32:50,149 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,168 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,254 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,278 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,336 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,415 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,483 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,499 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,501 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,511 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,511 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,512 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,513 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,514 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,514 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,516 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,516 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,517 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,517 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,518 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,518 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,520 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,521 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,522 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,522 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,527 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,528 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,528 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,530 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,535 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,535 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,536 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,544 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,544 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,546 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,551 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,553 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,553 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,556 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,556 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,560 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,561 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,564 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,570 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,570 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,573 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,577 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,577 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,578 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,579 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,580 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,592 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,596 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,596 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,597 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,598 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,603 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,604 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,604 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,605 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,607 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,607 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,608 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,608 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,613 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,614 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,614 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,615 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,616 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,617 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,618 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,618 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,623 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,623 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,624 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,629 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,629 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,630 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,631 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,633 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,634 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,634 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,635 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,640 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,640 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,641 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,641 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,641 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,644 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,645 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,646 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,651 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,651 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,652 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,652 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,655 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,655 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,656 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,668 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,669 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,670 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,671 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,673 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,679 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,681 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,685 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,690 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,690 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,691 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,692 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,700 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,700 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,701 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,702 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,706 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,707 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,708 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,710 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,710 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,713 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,714 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,716 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,727 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,728 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,728 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,730 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,731 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,731 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,733 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,734 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,735 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,735 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,738 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,739 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,741 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,746 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,746 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,747 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-09 12:32:50,916 WARN L180 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 9 [2018-12-09 12:32:51,338 WARN L180 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 41 [2018-12-09 12:32:51,467 WARN L180 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 13 [2018-12-09 12:32:51,890 WARN L180 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 48 [2018-12-09 12:32:51,892 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 12:32:51,892 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 12:32:51,892 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 12:32:51,892 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 12:32:51,892 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 12:32:51,893 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 12:32:51,893 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-12-09 12:32:51,893 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-12-09 12:32:51,893 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-12-09 12:32:51,893 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-12-09 12:32:51,893 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-12-09 12:32:51,893 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-12-09 12:32:51,893 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 8 main_~x~0) (<= main_~x~0 8)) [2018-12-09 12:32:51,893 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-12-09 12:32:51,893 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-12-09 12:32:51,893 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-12-09 12:32:51,893 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (< 2 |fibo2_#in~n|) (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n)) [2018-12-09 12:32:51,893 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-12-09 12:32:51,894 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse1 (<= |fibo2_#in~n| 3)) (.cse0 (<= fibo2_~n |fibo2_#in~n|)) (.cse2 (<= |fibo2_#in~n| fibo2_~n))) (and (or (< 4 |fibo2_#in~n|) (and .cse0 .cse1 .cse2)) (or (<= |fibo2_#in~n| 6) (and (<= 8 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 8)) (<= 8 |fibo2_#in~n|)) (or (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1) .cse1 (<= 3 |fibo2_#in~n|)) (and .cse0 (<= 7 |fibo2_#in~n|) .cse2) (and (<= |fibo2_#t~ret2| 3) .cse2 .cse0 (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 5) (<= 4 fibo2_~n)) (and .cse2 (<= 5 |fibo2_#t~ret2|) (<= fibo2_~n 6) (<= |fibo2_#t~ret2| 5) (<= 6 |fibo2_#in~n|))))) [2018-12-09 12:32:51,894 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-12-09 12:32:51,894 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-12-09 12:32:51,894 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-12-09 12:32:51,894 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-12-09 12:32:51,894 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-12-09 12:32:51,894 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-12-09 12:32:51,894 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (or (<= |fibo1_#in~n| 2) (< 3 |fibo1_#in~n|)) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n)) [2018-12-09 12:32:51,894 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-12-09 12:32:51,894 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse3 (<= |fibo1_#in~n| fibo1_~n))) (let ((.cse0 (and (<= 3 |fibo1_#t~ret0|) (<= |fibo1_#in~n| 5) (<= |fibo1_#t~ret0| 3) (<= 5 fibo1_~n))) (.cse2 (and (<= 2 |fibo1_#in~n|) (<= 1 |fibo1_#t~ret0|) (<= fibo1_~n 2) (<= |fibo1_#t~ret0| 1) .cse3)) (.cse1 (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) (<= |fibo1_#in~n| 4)))) (and (or .cse0 (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|)) (< |fibo1_#in~n| 3) (<= 7 |fibo1_#in~n|) .cse1) (<= fibo1_~n |fibo1_#in~n|) (or .cse2 (< 3 |fibo1_#in~n|)) (or .cse0 .cse2 (<= 6 |fibo1_#in~n|) .cse1) .cse3 (or (<= 9 |fibo1_#in~n|) (<= |fibo1_#in~n| 7) (and (<= |fibo1_#t~ret0| 13) (<= 13 |fibo1_#t~ret0|)))))) [2018-12-09 12:32:51,894 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-12-09 12:32:51,894 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-12-09 12:32:51,894 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-12-09 12:32:51,894 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-12-09 12:32:51,894 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-12-09 12:32:51,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:32:51 BoogieIcfgContainer [2018-12-09 12:32:51,897 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 12:32:51,897 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 12:32:51,897 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 12:32:51,897 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 12:32:51,897 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:32:38" (3/4) ... [2018-12-09 12:32:51,900 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 12:32:51,905 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 12:32:51,906 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 12:32:51,906 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-12-09 12:32:51,906 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-12-09 12:32:51,909 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-09 12:32:51,909 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-09 12:32:51,910 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 12:32:51,936 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_4c3349fe-39c1-42f7-aa58-04e4b6759fa2/bin-2019/uautomizer/witness.graphml [2018-12-09 12:32:51,936 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 12:32:51,937 INFO L168 Benchmark]: Toolchain (without parser) took 14073.88 ms. Allocated memory was 1.0 GB in the beginning and 2.1 GB in the end (delta: 1.1 GB). Free memory was 952.2 MB in the beginning and 934.5 MB in the end (delta: 17.7 MB). Peak memory consumption was 1.1 GB. Max. memory is 11.5 GB. [2018-12-09 12:32:51,937 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:32:51,937 INFO L168 Benchmark]: CACSL2BoogieTranslator took 119.59 ms. Allocated memory is still 1.0 GB. Free memory was 952.2 MB in the beginning and 941.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 12:32:51,938 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.48 ms. Allocated memory is still 1.0 GB. Free memory is still 941.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:32:51,938 INFO L168 Benchmark]: Boogie Preprocessor took 10.38 ms. Allocated memory is still 1.0 GB. Free memory is still 941.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:32:51,938 INFO L168 Benchmark]: RCFGBuilder took 158.46 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 938.8 MB in the beginning and 1.1 GB in the end (delta: -152.3 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2018-12-09 12:32:51,938 INFO L168 Benchmark]: TraceAbstraction took 13731.64 ms. Allocated memory was 1.1 GB in the beginning and 2.1 GB in the end (delta: 978.8 MB). Free memory was 1.1 GB in the beginning and 934.5 MB in the end (delta: 156.5 MB). Peak memory consumption was 1.1 GB. Max. memory is 11.5 GB. [2018-12-09 12:32:51,938 INFO L168 Benchmark]: Witness Printer took 39.60 ms. Allocated memory is still 2.1 GB. Free memory is still 934.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 12:32:51,940 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 119.59 ms. Allocated memory is still 1.0 GB. Free memory was 952.2 MB in the beginning and 941.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.48 ms. Allocated memory is still 1.0 GB. Free memory is still 941.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.38 ms. Allocated memory is still 1.0 GB. Free memory is still 941.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 158.46 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 938.8 MB in the beginning and 1.1 GB in the end (delta: -152.3 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 13731.64 ms. Allocated memory was 1.1 GB in the beginning and 2.1 GB in the end (delta: 978.8 MB). Free memory was 1.1 GB in the beginning and 934.5 MB in the end (delta: 156.5 MB). Peak memory consumption was 1.1 GB. Max. memory is 11.5 GB. * Witness Printer took 39.60 ms. Allocated memory is still 2.1 GB. Free memory is still 934.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. SAFE Result, 13.6s OverallTime, 20 OverallIterations, 69 TraceHistogramMax, 4.9s AutomataDifference, 0.0s DeadEndRemovalTime, 1.7s HoareAnnotationTime, HoareTripleCheckerStatistics: 682 SDtfs, 1044 SDslu, 6969 SDs, 0 SdLazy, 7475 SolverSat, 1100 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6395 GetRequests, 5866 SyntacticMatches, 39 SemanticMatches, 490 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2608 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=219occurred 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, 20 MinimizatonAttempts, 227 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 944 PreInvPairs, 2152 NumberOfFragments, 256 HoareAnnotationTreeSize, 944 FomulaSimplifications, 60871 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 11 FomulaSimplificationsInter, 31852 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 11691 NumberOfCodeBlocks, 10536 NumberOfCodeBlocksAsserted, 83 NumberOfCheckSat, 11653 ConstructedInterpolants, 0 QuantifiedInterpolants, 8345309 SizeOfPredicates, 101 NumberOfNonLiveVariables, 10309 ConjunctsInSsa, 474 ConjunctsInUnsatCore, 38 InterpolantComputations, 2 PerfectInterpolantSequences, 154116/169756 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...