./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann01_true-unreach-call_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann01_true-unreach-call_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/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 c2f1e635c5c806286d01eb0b8ff07448b8253a7a ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 13:39:58,702 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 13:39:58,704 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 13:39:58,714 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 13:39:58,714 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 13:39:58,715 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 13:39:58,716 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 13:39:58,717 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 13:39:58,718 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 13:39:58,719 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 13:39:58,720 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 13:39:58,720 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 13:39:58,721 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 13:39:58,721 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 13:39:58,722 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 13:39:58,724 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 13:39:58,724 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 13:39:58,726 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 13:39:58,727 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 13:39:58,729 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 13:39:58,729 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 13:39:58,730 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 13:39:58,732 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 13:39:58,732 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 13:39:58,733 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 13:39:58,733 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 13:39:58,734 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 13:39:58,735 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 13:39:58,736 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 13:39:58,737 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 13:39:58,737 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 13:39:58,737 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 13:39:58,737 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 13:39:58,738 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 13:39:58,738 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 13:39:58,739 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 13:39:58,739 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 13:39:58,749 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 13:39:58,749 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 13:39:58,750 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 13:39:58,750 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 13:39:58,751 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 13:39:58,751 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 13:39:58,751 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 13:39:58,751 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 13:39:58,751 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 13:39:58,751 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 13:39:58,751 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 13:39:58,752 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 13:39:58,752 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 13:39:58,752 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 13:39:58,752 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 13:39:58,752 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 13:39:58,752 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 13:39:58,752 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 13:39:58,753 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 13:39:58,753 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 13:39:58,753 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 13:39:58,753 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 13:39:58,753 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 13:39:58,753 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 13:39:58,754 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 13:39:58,754 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 13:39:58,754 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 13:39:58,754 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 13:39:58,754 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 13:39:58,754 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 13:39:58,754 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_d1f4616e-c270-4ed2-af36-5cbbbc26c653/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 -> c2f1e635c5c806286d01eb0b8ff07448b8253a7a [2018-11-23 13:39:58,780 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 13:39:58,790 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 13:39:58,793 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 13:39:58,795 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 13:39:58,795 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 13:39:58,796 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Ackermann01_true-unreach-call_true-no-overflow.c [2018-11-23 13:39:58,849 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/data/2489553d2/96bdb27c7dd44c02a0dc3c72f68cb80f/FLAG7f679dc48 [2018-11-23 13:39:59,198 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 13:39:59,198 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/sv-benchmarks/c/recursive/Ackermann01_true-unreach-call_true-no-overflow.c [2018-11-23 13:39:59,204 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/data/2489553d2/96bdb27c7dd44c02a0dc3c72f68cb80f/FLAG7f679dc48 [2018-11-23 13:39:59,215 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/data/2489553d2/96bdb27c7dd44c02a0dc3c72f68cb80f [2018-11-23 13:39:59,217 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 13:39:59,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 13:39:59,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 13:39:59,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 13:39:59,222 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 13:39:59,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:39:59" (1/1) ... [2018-11-23 13:39:59,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277df2b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:59, skipping insertion in model container [2018-11-23 13:39:59,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:39:59" (1/1) ... [2018-11-23 13:39:59,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 13:39:59,245 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 13:39:59,376 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 13:39:59,379 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 13:39:59,392 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 13:39:59,402 INFO L195 MainTranslator]: Completed translation [2018-11-23 13:39:59,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:59 WrapperNode [2018-11-23 13:39:59,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 13:39:59,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 13:39:59,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 13:39:59,403 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 13:39:59,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:59" (1/1) ... [2018-11-23 13:39:59,413 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:59" (1/1) ... [2018-11-23 13:39:59,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 13:39:59,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 13:39:59,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 13:39:59,418 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 13:39:59,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:59" (1/1) ... [2018-11-23 13:39:59,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:59" (1/1) ... [2018-11-23 13:39:59,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:59" (1/1) ... [2018-11-23 13:39:59,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:59" (1/1) ... [2018-11-23 13:39:59,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:59" (1/1) ... [2018-11-23 13:39:59,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:59" (1/1) ... [2018-11-23 13:39:59,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:59" (1/1) ... [2018-11-23 13:39:59,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 13:39:59,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 13:39:59,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 13:39:59,434 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 13:39:59,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 13:39:59,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 13:39:59,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 13:39:59,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 13:39:59,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 13:39:59,527 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2018-11-23 13:39:59,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2018-11-23 13:39:59,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 13:39:59,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 13:39:59,667 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 13:39:59,667 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 13:39:59,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:39:59 BoogieIcfgContainer [2018-11-23 13:39:59,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 13:39:59,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 13:39:59,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 13:39:59,671 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 13:39:59,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:39:59" (1/3) ... [2018-11-23 13:39:59,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648279d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:39:59, skipping insertion in model container [2018-11-23 13:39:59,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:59" (2/3) ... [2018-11-23 13:39:59,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648279d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:39:59, skipping insertion in model container [2018-11-23 13:39:59,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:39:59" (3/3) ... [2018-11-23 13:39:59,673 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann01_true-unreach-call_true-no-overflow.c [2018-11-23 13:39:59,680 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 13:39:59,686 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 13:39:59,700 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 13:39:59,731 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 13:39:59,732 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 13:39:59,732 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 13:39:59,732 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 13:39:59,732 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 13:39:59,732 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 13:39:59,733 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 13:39:59,733 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 13:39:59,733 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 13:39:59,751 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-11-23 13:39:59,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-23 13:39:59,755 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 13:39:59,756 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 13:39:59,758 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 13:39:59,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:39:59,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2018-11-23 13:39:59,764 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:39:59,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:39:59,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:39:59,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:39:59,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:39:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:39:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:39:59,955 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 13:39:59,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-23 13:39:59,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 13:39:59,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 13:39:59,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 13:39:59,970 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2018-11-23 13:40:00,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:40:00,188 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2018-11-23 13:40:00,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 13:40:00,189 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-11-23 13:40:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 13:40:00,198 INFO L225 Difference]: With dead ends: 41 [2018-11-23 13:40:00,198 INFO L226 Difference]: Without dead ends: 25 [2018-11-23 13:40:00,201 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-23 13:40:00,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-23 13:40:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-11-23 13:40:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-23 13:40:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2018-11-23 13:40:00,237 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2018-11-23 13:40:00,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 13:40:00,237 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2018-11-23 13:40:00,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 13:40:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2018-11-23 13:40:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-23 13:40:00,239 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 13:40:00,239 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] [2018-11-23 13:40:00,240 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 13:40:00,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:40:00,240 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2018-11-23 13:40:00,240 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:40:00,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:40:00,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:40:00,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:40:00,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:40:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:40:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 13:40:00,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 13:40:00,329 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 13:40:00,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:40:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:40:00,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:40:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 13:40:00,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 13:40:00,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-23 13:40:00,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 13:40:00,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 13:40:00,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-23 13:40:00,404 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 8 states. [2018-11-23 13:40:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:40:00,521 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2018-11-23 13:40:00,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 13:40:00,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-11-23 13:40:00,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 13:40:00,523 INFO L225 Difference]: With dead ends: 32 [2018-11-23 13:40:00,523 INFO L226 Difference]: Without dead ends: 28 [2018-11-23 13:40:00,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-11-23 13:40:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-23 13:40:00,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2018-11-23 13:40:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-23 13:40:00,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2018-11-23 13:40:00,530 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 22 [2018-11-23 13:40:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 13:40:00,530 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2018-11-23 13:40:00,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 13:40:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2018-11-23 13:40:00,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-23 13:40:00,532 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 13:40:00,532 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 13:40:00,532 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 13:40:00,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:40:00,533 INFO L82 PathProgramCache]: Analyzing trace with hash 408363011, now seen corresponding path program 1 times [2018-11-23 13:40:00,533 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:40:00,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:40:00,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:40:00,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:40:00,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:40:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:40:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 13:40:00,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 13:40:00,590 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 13:40:00,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:40:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:40:00,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:40:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-23 13:40:00,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 13:40:00,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2018-11-23 13:40:00,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 13:40:00,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 13:40:00,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-23 13:40:00,681 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 10 states. [2018-11-23 13:40:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:40:00,846 INFO L93 Difference]: Finished difference Result 51 states and 78 transitions. [2018-11-23 13:40:00,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 13:40:00,846 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-11-23 13:40:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 13:40:00,848 INFO L225 Difference]: With dead ends: 51 [2018-11-23 13:40:00,848 INFO L226 Difference]: Without dead ends: 33 [2018-11-23 13:40:00,849 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-11-23 13:40:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-23 13:40:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-11-23 13:40:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-23 13:40:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2018-11-23 13:40:00,856 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2018-11-23 13:40:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 13:40:00,857 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2018-11-23 13:40:00,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 13:40:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2018-11-23 13:40:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-23 13:40:00,858 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 13:40:00,859 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 13:40:00,859 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 13:40:00,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:40:00,859 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2018-11-23 13:40:00,859 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:40:00,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:40:00,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:40:00,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:40:00,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:40:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:40:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-23 13:40:00,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 13:40:00,959 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 13:40:00,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:40:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:40:00,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:40:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-23 13:40:01,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 13:40:01,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-23 13:40:01,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 13:40:01,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 13:40:01,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-11-23 13:40:01,035 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 11 states. [2018-11-23 13:40:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:40:01,241 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2018-11-23 13:40:01,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 13:40:01,241 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-11-23 13:40:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 13:40:01,242 INFO L225 Difference]: With dead ends: 42 [2018-11-23 13:40:01,243 INFO L226 Difference]: Without dead ends: 38 [2018-11-23 13:40:01,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-11-23 13:40:01,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-23 13:40:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2018-11-23 13:40:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-23 13:40:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 53 transitions. [2018-11-23 13:40:01,250 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 53 transitions. Word has length 35 [2018-11-23 13:40:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 13:40:01,251 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 53 transitions. [2018-11-23 13:40:01,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 13:40:01,251 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2018-11-23 13:40:01,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-23 13:40:01,252 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 13:40:01,252 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 13:40:01,252 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 13:40:01,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:40:01,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1711672813, now seen corresponding path program 2 times [2018-11-23 13:40:01,253 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:40:01,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:40:01,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:40:01,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:40:01,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:40:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:40:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-23 13:40:01,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 13:40:01,364 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 13:40:01,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 13:40:01,400 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 13:40:01,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 13:40:01,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:40:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-23 13:40:01,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 13:40:01,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-23 13:40:01,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 13:40:01,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 13:40:01,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-11-23 13:40:01,446 INFO L87 Difference]: Start difference. First operand 36 states and 53 transitions. Second operand 12 states. [2018-11-23 13:40:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:40:01,616 INFO L93 Difference]: Finished difference Result 49 states and 75 transitions. [2018-11-23 13:40:01,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-23 13:40:01,617 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-11-23 13:40:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 13:40:01,618 INFO L225 Difference]: With dead ends: 49 [2018-11-23 13:40:01,618 INFO L226 Difference]: Without dead ends: 45 [2018-11-23 13:40:01,619 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2018-11-23 13:40:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-23 13:40:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-11-23 13:40:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-23 13:40:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2018-11-23 13:40:01,628 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 42 [2018-11-23 13:40:01,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 13:40:01,628 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2018-11-23 13:40:01,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 13:40:01,628 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2018-11-23 13:40:01,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-23 13:40:01,629 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 13:40:01,630 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 13:40:01,630 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 13:40:01,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:40:01,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1051926487, now seen corresponding path program 3 times [2018-11-23 13:40:01,630 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:40:01,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:40:01,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:40:01,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 13:40:01,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:40:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:40:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-23 13:40:01,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 13:40:01,710 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 13:40:01,721 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 13:40:01,738 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-23 13:40:01,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 13:40:01,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:40:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-23 13:40:01,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 13:40:01,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-23 13:40:01,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 13:40:01,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 13:40:01,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-23 13:40:01,766 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand 9 states. [2018-11-23 13:40:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:40:01,841 INFO L93 Difference]: Finished difference Result 42 states and 58 transitions. [2018-11-23 13:40:01,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 13:40:01,842 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2018-11-23 13:40:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 13:40:01,843 INFO L225 Difference]: With dead ends: 42 [2018-11-23 13:40:01,843 INFO L226 Difference]: Without dead ends: 38 [2018-11-23 13:40:01,843 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-11-23 13:40:01,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-23 13:40:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-11-23 13:40:01,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-23 13:40:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 54 transitions. [2018-11-23 13:40:01,850 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 54 transitions. Word has length 42 [2018-11-23 13:40:01,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 13:40:01,850 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 54 transitions. [2018-11-23 13:40:01,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 13:40:01,850 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 54 transitions. [2018-11-23 13:40:01,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-23 13:40:01,852 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 13:40:01,852 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 13:40:01,853 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 13:40:01,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:40:01,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1758821282, now seen corresponding path program 4 times [2018-11-23 13:40:01,853 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:40:01,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:40:01,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:40:01,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 13:40:01,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:40:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:40:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-11-23 13:40:01,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 13:40:01,905 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 13:40:01,912 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 13:40:01,927 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 13:40:01,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 13:40:01,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:40:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 52 proven. 17 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-23 13:40:02,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 13:40:02,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2018-11-23 13:40:02,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 13:40:02,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 13:40:02,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-11-23 13:40:02,012 INFO L87 Difference]: Start difference. First operand 38 states and 54 transitions. Second operand 15 states. [2018-11-23 13:40:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:40:02,358 INFO L93 Difference]: Finished difference Result 96 states and 207 transitions. [2018-11-23 13:40:02,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-23 13:40:02,358 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2018-11-23 13:40:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 13:40:02,360 INFO L225 Difference]: With dead ends: 96 [2018-11-23 13:40:02,360 INFO L226 Difference]: Without dead ends: 66 [2018-11-23 13:40:02,362 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2018-11-23 13:40:02,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-23 13:40:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2018-11-23 13:40:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-23 13:40:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 111 transitions. [2018-11-23 13:40:02,377 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 111 transitions. Word has length 55 [2018-11-23 13:40:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 13:40:02,378 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 111 transitions. [2018-11-23 13:40:02,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 13:40:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 111 transitions. [2018-11-23 13:40:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-11-23 13:40:02,381 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 13:40:02,382 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 13:40:02,382 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 13:40:02,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:40:02,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1483482771, now seen corresponding path program 5 times [2018-11-23 13:40:02,382 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:40:02,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:40:02,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:40:02,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 13:40:02,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:40:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:40:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-23 13:40:02,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 13:40:02,478 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 13:40:02,489 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 13:40:02,517 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-23 13:40:02,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 13:40:02,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:40:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-11-23 13:40:02,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 13:40:02,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2018-11-23 13:40:02,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-23 13:40:02,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-23 13:40:02,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2018-11-23 13:40:02,651 INFO L87 Difference]: Start difference. First operand 63 states and 111 transitions. Second operand 20 states. [2018-11-23 13:40:03,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:40:03,063 INFO L93 Difference]: Finished difference Result 95 states and 181 transitions. [2018-11-23 13:40:03,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-23 13:40:03,063 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-11-23 13:40:03,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 13:40:03,064 INFO L225 Difference]: With dead ends: 95 [2018-11-23 13:40:03,064 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 13:40:03,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2018-11-23 13:40:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 13:40:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 13:40:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 13:40:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 13:40:03,065 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2018-11-23 13:40:03,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 13:40:03,065 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 13:40:03,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-23 13:40:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 13:40:03,066 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 13:40:03,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 13:40:03,260 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 13:40:03,260 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 13:40:03,260 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 13:40:03,261 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 13:40:03,261 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 13:40:03,261 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 13:40:03,261 INFO L448 ceAbstractionStarter]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2018-11-23 13:40:03,261 INFO L444 ceAbstractionStarter]: At program point L22(line 22) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| ackermann_~n) (or (< |ackermann_#in~m| 0) (< 0 |ackermann_#in~m|))) [2018-11-23 13:40:03,261 INFO L451 ceAbstractionStarter]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2018-11-23 13:40:03,261 INFO L448 ceAbstractionStarter]: For program point L22-1(line 22) no Hoare annotation was computed. [2018-11-23 13:40:03,261 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |ackermann_#in~n| 0) (= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| ackermann_~n) (or (< |ackermann_#in~m| 0) (< 0 |ackermann_#in~m|))) [2018-11-23 13:40:03,261 INFO L444 ceAbstractionStarter]: At program point L22-2(line 22) the Hoare annotation is: (and (< 0 |ackermann_#in~m|) (let ((.cse0 (= ackermann_~m |ackermann_#in~m|)) (.cse1 (<= |ackermann_#in~n| ackermann_~n))) (or (and (<= 3 |ackermann_#t~ret1|) .cse0 .cse1) (and .cse0 .cse1 (<= |ackermann_#in~m| 1) (<= 2 |ackermann_#t~ret1|))))) [2018-11-23 13:40:03,262 INFO L448 ceAbstractionStarter]: For program point L19(lines 19 21) no Hoare annotation was computed. [2018-11-23 13:40:03,262 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-23 13:40:03,262 INFO L448 ceAbstractionStarter]: For program point L22-3(line 22) no Hoare annotation was computed. [2018-11-23 13:40:03,262 INFO L448 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2018-11-23 13:40:03,262 INFO L448 ceAbstractionStarter]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2018-11-23 13:40:03,262 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2018-11-23 13:40:03,262 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2018-11-23 13:40:03,262 INFO L448 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-11-23 13:40:03,262 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2018-11-23 13:40:03,262 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2018-11-23 13:40:03,262 INFO L448 ceAbstractionStarter]: For program point L44(line 44) no Hoare annotation was computed. [2018-11-23 13:40:03,262 INFO L448 ceAbstractionStarter]: For program point L41(lines 41 45) no Hoare annotation was computed. [2018-11-23 13:40:03,263 INFO L444 ceAbstractionStarter]: At program point L40(line 40) the Hoare annotation is: (<= 0 main_~n~0) [2018-11-23 13:40:03,263 INFO L448 ceAbstractionStarter]: For program point L40-1(line 40) no Hoare annotation was computed. [2018-11-23 13:40:03,263 INFO L448 ceAbstractionStarter]: For program point L34(lines 34 39) no Hoare annotation was computed. [2018-11-23 13:40:03,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:40:03 BoogieIcfgContainer [2018-11-23 13:40:03,265 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 13:40:03,266 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 13:40:03,266 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 13:40:03,266 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 13:40:03,266 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:39:59" (3/4) ... [2018-11-23 13:40:03,270 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 13:40:03,276 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 13:40:03,276 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2018-11-23 13:40:03,276 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 13:40:03,281 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 13:40:03,281 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-23 13:40:03,281 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 13:40:03,319 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d1f4616e-c270-4ed2-af36-5cbbbc26c653/bin-2019/uautomizer/witness.graphml [2018-11-23 13:40:03,319 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 13:40:03,320 INFO L168 Benchmark]: Toolchain (without parser) took 4102.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.2 MB). Free memory was 959.1 MB in the beginning and 1.1 GB in the end (delta: -111.9 MB). Peak memory consumption was 55.3 MB. Max. memory is 11.5 GB. [2018-11-23 13:40:03,322 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 13:40:03,322 INFO L168 Benchmark]: CACSL2BoogieTranslator took 183.75 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 13:40:03,323 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.06 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 13:40:03,323 INFO L168 Benchmark]: Boogie Preprocessor took 15.25 ms. Allocated memory is still 1.0 GB. Free memory was 945.7 MB in the beginning and 940.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-23 13:40:03,323 INFO L168 Benchmark]: RCFGBuilder took 234.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -168.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-23 13:40:03,324 INFO L168 Benchmark]: TraceAbstraction took 3597.11 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 44.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.8 MB). Peak memory consumption was 77.3 MB. Max. memory is 11.5 GB. [2018-11-23 13:40:03,324 INFO L168 Benchmark]: Witness Printer took 53.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 11.5 GB. [2018-11-23 13:40:03,327 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 183.75 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 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 15.06 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.25 ms. Allocated memory is still 1.0 GB. Free memory was 945.7 MB in the beginning and 940.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 234.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -168.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3597.11 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 44.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.8 MB). Peak memory consumption was 77.3 MB. Max. memory is 11.5 GB. * Witness Printer took 53.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. SAFE Result, 3.5s OverallTime, 8 OverallIterations, 10 TraceHistogramMax, 1.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 165 SDtfs, 203 SDslu, 850 SDs, 0 SdLazy, 1382 SolverSat, 274 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 444 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=7, 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: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 23 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 89 PreInvPairs, 110 NumberOfFragments, 72 HoareAnnotationTreeSize, 89 FomulaSimplifications, 555 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 432 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 613 NumberOfCodeBlocks, 566 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 598 ConstructedInterpolants, 0 QuantifiedInterpolants, 53344 SizeOfPredicates, 25 NumberOfNonLiveVariables, 746 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 664/880 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...