./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_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_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/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 ffdaeeffc8c5fdb555812137dbba1199bd1a626d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-01 20:20:12,949 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 20:20:12,950 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 20:20:12,957 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 20:20:12,957 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 20:20:12,958 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 20:20:12,958 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 20:20:12,960 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 20:20:12,961 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 20:20:12,961 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 20:20:12,962 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 20:20:12,962 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 20:20:12,963 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 20:20:12,963 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 20:20:12,964 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 20:20:12,965 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 20:20:12,965 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 20:20:12,967 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 20:20:12,968 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 20:20:12,969 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 20:20:12,970 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 20:20:12,970 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 20:20:12,972 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 20:20:12,972 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 20:20:12,972 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 20:20:12,973 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 20:20:12,973 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 20:20:12,974 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 20:20:12,974 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 20:20:12,975 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 20:20:12,975 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 20:20:12,975 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 20:20:12,975 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 20:20:12,975 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 20:20:12,976 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 20:20:12,976 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 20:20:12,976 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-01 20:20:12,982 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 20:20:12,983 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 20:20:12,983 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 20:20:12,983 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 20:20:12,984 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 20:20:12,984 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 20:20:12,984 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 20:20:12,984 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 20:20:12,984 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 20:20:12,984 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 20:20:12,984 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 20:20:12,984 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 20:20:12,984 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 20:20:12,984 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 20:20:12,984 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 20:20:12,984 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 20:20:12,984 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 20:20:12,985 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 20:20:12,985 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 20:20:12,985 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 20:20:12,985 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 20:20:12,985 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 20:20:12,985 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 20:20:12,985 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 20:20:12,985 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 20:20:12,985 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 20:20:12,985 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 20:20:12,985 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 20:20:12,985 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 20:20:12,986 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 20:20:12,986 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_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/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 -> ffdaeeffc8c5fdb555812137dbba1199bd1a626d [2018-12-01 20:20:13,009 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 20:20:13,017 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 20:20:13,020 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 20:20:13,021 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 20:20:13,021 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 20:20:13,022 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4_true-unreach-call_true-termination.c [2018-12-01 20:20:13,064 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/bin-2019/uautomizer/data/667c1ad3f/b82a51dfcc6d4a09a5d352e48b3ca8a4/FLAG60a5f6cc5 [2018-12-01 20:20:13,442 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 20:20:13,443 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/sv-benchmarks/c/recursive-simple/fibo_2calls_4_true-unreach-call_true-termination.c [2018-12-01 20:20:13,446 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/bin-2019/uautomizer/data/667c1ad3f/b82a51dfcc6d4a09a5d352e48b3ca8a4/FLAG60a5f6cc5 [2018-12-01 20:20:13,454 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/bin-2019/uautomizer/data/667c1ad3f/b82a51dfcc6d4a09a5d352e48b3ca8a4 [2018-12-01 20:20:13,456 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 20:20:13,456 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 20:20:13,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 20:20:13,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 20:20:13,459 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 20:20:13,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 08:20:13" (1/1) ... [2018-12-01 20:20:13,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d01f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 08:20:13, skipping insertion in model container [2018-12-01 20:20:13,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 08:20:13" (1/1) ... [2018-12-01 20:20:13,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 20:20:13,474 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 20:20:13,557 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 20:20:13,559 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 20:20:13,568 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 20:20:13,576 INFO L195 MainTranslator]: Completed translation [2018-12-01 20:20:13,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 08:20:13 WrapperNode [2018-12-01 20:20:13,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 20:20:13,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 20:20:13,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 20:20:13,577 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 20:20:13,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 08:20:13" (1/1) ... [2018-12-01 20:20:13,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 08:20:13" (1/1) ... [2018-12-01 20:20:13,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 20:20:13,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 20:20:13,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 20:20:13,589 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 20:20:13,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 08:20:13" (1/1) ... [2018-12-01 20:20:13,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 08:20:13" (1/1) ... [2018-12-01 20:20:13,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 08:20:13" (1/1) ... [2018-12-01 20:20:13,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 08:20:13" (1/1) ... [2018-12-01 20:20:13,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 08:20:13" (1/1) ... [2018-12-01 20:20:13,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 08:20:13" (1/1) ... [2018-12-01 20:20:13,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 08:20:13" (1/1) ... [2018-12-01 20:20:13,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 20:20:13,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 20:20:13,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 20:20:13,600 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 20:20:13,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 08:20:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/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 [2018-12-01 20:20:13,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 20:20:13,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 20:20:13,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 20:20:13,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 20:20:13,661 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 20:20:13,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 20:20:13,662 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-12-01 20:20:13,662 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-12-01 20:20:13,662 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-12-01 20:20:13,662 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-12-01 20:20:13,766 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 20:20:13,766 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-01 20:20:13,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 08:20:13 BoogieIcfgContainer [2018-12-01 20:20:13,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 20:20:13,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 20:20:13,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 20:20:13,769 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 20:20:13,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 08:20:13" (1/3) ... [2018-12-01 20:20:13,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad97423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 08:20:13, skipping insertion in model container [2018-12-01 20:20:13,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 08:20:13" (2/3) ... [2018-12-01 20:20:13,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad97423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 08:20:13, skipping insertion in model container [2018-12-01 20:20:13,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 08:20:13" (3/3) ... [2018-12-01 20:20:13,772 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4_true-unreach-call_true-termination.c [2018-12-01 20:20:13,778 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 20:20:13,782 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-01 20:20:13,792 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-01 20:20:13,810 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 20:20:13,810 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 20:20:13,811 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 20:20:13,811 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 20:20:13,811 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 20:20:13,811 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 20:20:13,811 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 20:20:13,811 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 20:20:13,811 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 20:20:13,822 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-12-01 20:20:13,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-01 20:20:13,826 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 20:20:13,826 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 20:20:13,827 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 20:20:13,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 20:20:13,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-12-01 20:20:13,832 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 20:20:13,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 20:20:13,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:13,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:13,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 20:20:13,933 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 20:20:13,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 20:20:13,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 20:20:13,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 20:20:13,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 20:20:13,944 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-12-01 20:20:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 20:20:13,997 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-12-01 20:20:13,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 20:20:13,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-01 20:20:13,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 20:20:14,004 INFO L225 Difference]: With dead ends: 44 [2018-12-01 20:20:14,004 INFO L226 Difference]: Without dead ends: 30 [2018-12-01 20:20:14,006 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 [2018-12-01 20:20:14,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-01 20:20:14,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-01 20:20:14,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-01 20:20:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-01 20:20:14,031 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-12-01 20:20:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 20:20:14,031 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-01 20:20:14,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 20:20:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-01 20:20:14,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-01 20:20:14,032 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 20:20:14,032 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 20:20:14,033 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 20:20:14,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 20:20:14,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-12-01 20:20:14,033 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 20:20:14,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 20:20:14,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:14,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:14,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 20:20:14,066 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 20:20:14,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 20:20:14,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 20:20:14,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 20:20:14,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 20:20:14,067 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-12-01 20:20:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 20:20:14,099 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-12-01 20:20:14,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 20:20:14,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-01 20:20:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 20:20:14,100 INFO L225 Difference]: With dead ends: 36 [2018-12-01 20:20:14,100 INFO L226 Difference]: Without dead ends: 32 [2018-12-01 20:20:14,100 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 [2018-12-01 20:20:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-01 20:20:14,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-01 20:20:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-01 20:20:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-01 20:20:14,104 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-12-01 20:20:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 20:20:14,105 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-01 20:20:14,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 20:20:14,105 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-01 20:20:14,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-01 20:20:14,105 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 20:20:14,105 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] [2018-12-01 20:20:14,106 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 20:20:14,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 20:20:14,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-12-01 20:20:14,106 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 20:20:14,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 20:20:14,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:14,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:14,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 20:20:14,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 20:20:14,144 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/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 [2018-12-01 20:20:14,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:14,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 20:20:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 20:20:14,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 20:20:14,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-12-01 20:20:14,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 20:20:14,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 20:20:14,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-01 20:20:14,223 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-12-01 20:20:14,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 20:20:14,340 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-12-01 20:20:14,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-01 20:20:14,341 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-12-01 20:20:14,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 20:20:14,342 INFO L225 Difference]: With dead ends: 58 [2018-12-01 20:20:14,342 INFO L226 Difference]: Without dead ends: 34 [2018-12-01 20:20:14,343 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 [2018-12-01 20:20:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-01 20:20:14,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-12-01 20:20:14,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-01 20:20:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-12-01 20:20:14,349 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-12-01 20:20:14,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 20:20:14,350 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-12-01 20:20:14,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 20:20:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-12-01 20:20:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-01 20:20:14,351 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 20:20:14,351 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] [2018-12-01 20:20:14,352 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 20:20:14,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 20:20:14,352 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-12-01 20:20:14,352 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 20:20:14,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 20:20:14,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:14,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:14,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 20:20:14,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 20:20:14,405 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/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 [2018-12-01 20:20:14,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:14,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 20:20:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 20:20:14,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 20:20:14,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-01 20:20:14,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-01 20:20:14,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-01 20:20:14,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-01 20:20:14,444 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-12-01 20:20:14,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 20:20:14,497 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-12-01 20:20:14,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 20:20:14,497 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-12-01 20:20:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 20:20:14,498 INFO L225 Difference]: With dead ends: 43 [2018-12-01 20:20:14,498 INFO L226 Difference]: Without dead ends: 39 [2018-12-01 20:20:14,498 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 [2018-12-01 20:20:14,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-01 20:20:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-12-01 20:20:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-01 20:20:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-12-01 20:20:14,502 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-12-01 20:20:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 20:20:14,502 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-12-01 20:20:14,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-01 20:20:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-12-01 20:20:14,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-01 20:20:14,503 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 20:20:14,503 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] [2018-12-01 20:20:14,503 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 20:20:14,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 20:20:14,504 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-12-01 20:20:14,504 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 20:20:14,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 20:20:14,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:14,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:14,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-01 20:20:14,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 20:20:14,536 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/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 [2018-12-01 20:20:14,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:14,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 20:20:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-01 20:20:14,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 20:20:14,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-12-01 20:20:14,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-01 20:20:14,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-01 20:20:14,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-12-01 20:20:14,622 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-12-01 20:20:14,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 20:20:14,737 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-12-01 20:20:14,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-01 20:20:14,737 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-12-01 20:20:14,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 20:20:14,738 INFO L225 Difference]: With dead ends: 70 [2018-12-01 20:20:14,738 INFO L226 Difference]: Without dead ends: 39 [2018-12-01 20:20:14,739 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 [2018-12-01 20:20:14,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-01 20:20:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-01 20:20:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-01 20:20:14,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-12-01 20:20:14,743 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-12-01 20:20:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 20:20:14,744 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-12-01 20:20:14,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-01 20:20:14,744 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-12-01 20:20:14,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-01 20:20:14,745 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 20:20:14,745 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] [2018-12-01 20:20:14,745 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 20:20:14,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 20:20:14,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-12-01 20:20:14,746 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 20:20:14,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 20:20:14,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:14,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:14,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-01 20:20:14,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 20:20:14,781 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/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 [2018-12-01 20:20:14,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:14,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 20:20:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-01 20:20:14,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 20:20:14,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-12-01 20:20:14,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-01 20:20:14,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-01 20:20:14,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-01 20:20:14,851 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-12-01 20:20:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 20:20:14,936 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-12-01 20:20:14,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-01 20:20:14,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-12-01 20:20:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 20:20:14,938 INFO L225 Difference]: With dead ends: 61 [2018-12-01 20:20:14,938 INFO L226 Difference]: Without dead ends: 57 [2018-12-01 20:20:14,938 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 [2018-12-01 20:20:14,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-01 20:20:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-12-01 20:20:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-01 20:20:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-12-01 20:20:14,947 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-12-01 20:20:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 20:20:14,948 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-12-01 20:20:14,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-01 20:20:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-12-01 20:20:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-12-01 20:20:14,949 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 20:20:14,949 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] [2018-12-01 20:20:14,950 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 20:20:14,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 20:20:14,950 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-12-01 20:20:14,950 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 20:20:14,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 20:20:14,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:14,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:14,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-01 20:20:15,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 20:20:15,022 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/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 [2018-12-01 20:20:15,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:15,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 20:20:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-01 20:20:15,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 20:20:15,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2018-12-01 20:20:15,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 20:20:15,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 20:20:15,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-01 20:20:15,076 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 9 states. [2018-12-01 20:20:15,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 20:20:15,151 INFO L93 Difference]: Finished difference Result 66 states and 104 transitions. [2018-12-01 20:20:15,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 20:20:15,151 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2018-12-01 20:20:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 20:20:15,152 INFO L225 Difference]: With dead ends: 66 [2018-12-01 20:20:15,152 INFO L226 Difference]: Without dead ends: 62 [2018-12-01 20:20:15,152 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-12-01 20:20:15,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-01 20:20:15,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2018-12-01 20:20:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-01 20:20:15,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2018-12-01 20:20:15,157 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 54 [2018-12-01 20:20:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 20:20:15,158 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2018-12-01 20:20:15,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 20:20:15,158 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2018-12-01 20:20:15,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-01 20:20:15,159 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 20:20:15,159 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 20:20:15,159 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 20:20:15,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 20:20:15,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1822439602, now seen corresponding path program 1 times [2018-12-01 20:20:15,159 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 20:20:15,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 20:20:15,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:15,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:15,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-12-01 20:20:15,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 20:20:15,241 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/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 [2018-12-01 20:20:15,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:15,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 20:20:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 44 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-12-01 20:20:15,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 20:20:15,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 12 [2018-12-01 20:20:15,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-01 20:20:15,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-01 20:20:15,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-12-01 20:20:15,305 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand 12 states. [2018-12-01 20:20:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 20:20:15,390 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2018-12-01 20:20:15,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 20:20:15,390 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2018-12-01 20:20:15,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 20:20:15,391 INFO L225 Difference]: With dead ends: 59 [2018-12-01 20:20:15,391 INFO L226 Difference]: Without dead ends: 55 [2018-12-01 20:20:15,391 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-12-01 20:20:15,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-01 20:20:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2018-12-01 20:20:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-01 20:20:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2018-12-01 20:20:15,395 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 81 [2018-12-01 20:20:15,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 20:20:15,396 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2018-12-01 20:20:15,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-01 20:20:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2018-12-01 20:20:15,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-01 20:20:15,397 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 20:20:15,397 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 20:20:15,397 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 20:20:15,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 20:20:15,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 2 times [2018-12-01 20:20:15,397 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 20:20:15,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 20:20:15,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:15,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:15,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-12-01 20:20:15,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 20:20:15,561 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/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 [2018-12-01 20:20:15,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 20:20:15,578 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 20:20:15,579 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 20:20:15,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 20:20:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2018-12-01 20:20:15,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 20:20:15,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2018-12-01 20:20:15,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-01 20:20:15,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-01 20:20:15,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2018-12-01 20:20:15,695 INFO L87 Difference]: Start difference. First operand 47 states and 65 transitions. Second operand 21 states. [2018-12-01 20:20:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 20:20:15,800 INFO L93 Difference]: Finished difference Result 82 states and 140 transitions. [2018-12-01 20:20:15,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-01 20:20:15,800 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2018-12-01 20:20:15,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 20:20:15,801 INFO L225 Difference]: With dead ends: 82 [2018-12-01 20:20:15,801 INFO L226 Difference]: Without dead ends: 78 [2018-12-01 20:20:15,801 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2018-12-01 20:20:15,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-01 20:20:15,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2018-12-01 20:20:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-01 20:20:15,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 89 transitions. [2018-12-01 20:20:15,807 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 89 transitions. Word has length 68 [2018-12-01 20:20:15,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 20:20:15,808 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 89 transitions. [2018-12-01 20:20:15,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-01 20:20:15,808 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 89 transitions. [2018-12-01 20:20:15,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-01 20:20:15,809 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 20:20:15,809 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 20:20:15,809 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 20:20:15,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 20:20:15,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1711191765, now seen corresponding path program 1 times [2018-12-01 20:20:15,809 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 20:20:15,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 20:20:15,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:15,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 20:20:15,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-01 20:20:15,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 20:20:15,866 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/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 [2018-12-01 20:20:15,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:15,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 20:20:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-01 20:20:15,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 20:20:15,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-01 20:20:15,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 20:20:15,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 20:20:15,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-01 20:20:15,914 INFO L87 Difference]: Start difference. First operand 57 states and 89 transitions. Second operand 9 states. [2018-12-01 20:20:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 20:20:16,003 INFO L93 Difference]: Finished difference Result 82 states and 151 transitions. [2018-12-01 20:20:16,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 20:20:16,003 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2018-12-01 20:20:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 20:20:16,004 INFO L225 Difference]: With dead ends: 82 [2018-12-01 20:20:16,004 INFO L226 Difference]: Without dead ends: 57 [2018-12-01 20:20:16,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-12-01 20:20:16,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-01 20:20:16,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-12-01 20:20:16,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-01 20:20:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2018-12-01 20:20:16,013 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 69 [2018-12-01 20:20:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 20:20:16,013 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2018-12-01 20:20:16,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 20:20:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2018-12-01 20:20:16,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-12-01 20:20:16,014 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 20:20:16,014 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 20:20:16,014 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 20:20:16,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 20:20:16,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1066786365, now seen corresponding path program 3 times [2018-12-01 20:20:16,015 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 20:20:16,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 20:20:16,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:16,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 20:20:16,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 50 proven. 32 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-12-01 20:20:16,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 20:20:16,045 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/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 [2018-12-01 20:20:16,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 20:20:16,071 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-12-01 20:20:16,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 20:20:16,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 20:20:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 114 proven. 4 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-12-01 20:20:16,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 20:20:16,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-01 20:20:16,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-01 20:20:16,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-01 20:20:16,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-01 20:20:16,109 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand 7 states. [2018-12-01 20:20:16,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 20:20:16,180 INFO L93 Difference]: Finished difference Result 113 states and 154 transitions. [2018-12-01 20:20:16,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 20:20:16,181 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2018-12-01 20:20:16,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 20:20:16,181 INFO L225 Difference]: With dead ends: 113 [2018-12-01 20:20:16,181 INFO L226 Difference]: Without dead ends: 61 [2018-12-01 20:20:16,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-12-01 20:20:16,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-12-01 20:20:16,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-12-01 20:20:16,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-01 20:20:16,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2018-12-01 20:20:16,186 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 95 [2018-12-01 20:20:16,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 20:20:16,186 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2018-12-01 20:20:16,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-01 20:20:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2018-12-01 20:20:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-12-01 20:20:16,187 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 20:20:16,187 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 20:20:16,187 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 20:20:16,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 20:20:16,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1451477590, now seen corresponding path program 4 times [2018-12-01 20:20:16,187 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 20:20:16,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 20:20:16,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:16,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 20:20:16,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 20:20:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 20:20:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 84 proven. 37 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-12-01 20:20:16,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 20:20:16,240 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/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 [2018-12-01 20:20:16,246 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 20:20:16,259 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 20:20:16,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 20:20:16,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 20:20:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 50 proven. 44 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2018-12-01 20:20:16,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 20:20:16,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-12-01 20:20:16,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-01 20:20:16,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-01 20:20:16,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-12-01 20:20:16,328 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 14 states. [2018-12-01 20:20:16,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 20:20:16,436 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2018-12-01 20:20:16,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-01 20:20:16,436 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 108 [2018-12-01 20:20:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 20:20:16,436 INFO L225 Difference]: With dead ends: 104 [2018-12-01 20:20:16,436 INFO L226 Difference]: Without dead ends: 0 [2018-12-01 20:20:16,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2018-12-01 20:20:16,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-01 20:20:16,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-01 20:20:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-01 20:20:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-01 20:20:16,437 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2018-12-01 20:20:16,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 20:20:16,437 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 20:20:16,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-01 20:20:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-01 20:20:16,438 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-01 20:20:16,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-01 20:20:16,499 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-01 20:20:16,503 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-01 20:20:16,507 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-01 20:20:16,518 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-01 20:20:16,522 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-01 20:20:16,548 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-01 20:20:16,552 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-01 20:20:16,560 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-01 20:20:16,564 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-01 20:20:16,750 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-01 20:20:16,750 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-01 20:20:16,750 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-01 20:20:16,750 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-01 20:20:16,750 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-01 20:20:16,750 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-01 20:20:16,750 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-12-01 20:20:16,750 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-12-01 20:20:16,751 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-12-01 20:20:16,751 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-12-01 20:20:16,751 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-12-01 20:20:16,751 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-12-01 20:20:16,751 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2018-12-01 20:20:16,751 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-12-01 20:20:16,751 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-12-01 20:20:16,751 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-12-01 20:20:16,751 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= 2 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n)) [2018-12-01 20:20:16,751 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-12-01 20:20:16,751 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= 2 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n) (or (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1)) (<= 4 |fibo2_#in~n|))) [2018-12-01 20:20:16,751 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-12-01 20:20:16,751 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-12-01 20:20:16,751 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-12-01 20:20:16,751 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-12-01 20:20:16,751 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-12-01 20:20:16,751 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-12-01 20:20:16,751 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n)) [2018-12-01 20:20:16,752 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-12-01 20:20:16,752 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (or (<= 3 fibo1_~n) (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1))) (let ((.cse0 (<= |fibo1_#in~n| fibo1_~n))) (or (and .cse0 (<= 5 |fibo1_#in~n|)) (and (< 1 fibo1_~n) (<= |fibo1_#in~n| 3) .cse0) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) .cse0)))) [2018-12-01 20:20:16,752 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-12-01 20:20:16,752 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-12-01 20:20:16,752 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-12-01 20:20:16,752 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-12-01 20:20:16,752 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-12-01 20:20:16,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 08:20:16 BoogieIcfgContainer [2018-12-01 20:20:16,754 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 20:20:16,754 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 20:20:16,754 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 20:20:16,754 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 20:20:16,754 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 08:20:13" (3/4) ... [2018-12-01 20:20:16,757 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-01 20:20:16,762 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-01 20:20:16,762 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-01 20:20:16,762 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-12-01 20:20:16,762 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-12-01 20:20:16,765 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-01 20:20:16,765 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-01 20:20:16,765 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-01 20:20:16,790 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_5cab4a0e-9d8f-4234-a161-3162a1fb6c25/bin-2019/uautomizer/witness.graphml [2018-12-01 20:20:16,790 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 20:20:16,791 INFO L168 Benchmark]: Toolchain (without parser) took 3334.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 952.2 MB in the beginning and 887.8 MB in the end (delta: 64.4 MB). Peak memory consumption was 200.2 MB. Max. memory is 11.5 GB. [2018-12-01 20:20:16,792 INFO L168 Benchmark]: CDTParser took 0.15 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. [2018-12-01 20:20:16,792 INFO L168 Benchmark]: CACSL2BoogieTranslator took 119.48 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. [2018-12-01 20:20:16,792 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.69 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. [2018-12-01 20:20:16,793 INFO L168 Benchmark]: Boogie Preprocessor took 11.06 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. [2018-12-01 20:20:16,793 INFO L168 Benchmark]: RCFGBuilder took 167.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 86.0 MB). Free memory was 938.8 MB in the beginning and 1.1 GB in the end (delta: -133.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. [2018-12-01 20:20:16,793 INFO L168 Benchmark]: TraceAbstraction took 2986.46 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 49.8 MB). Free memory was 1.1 GB in the beginning and 892.6 MB in the end (delta: 179.7 MB). Peak memory consumption was 229.5 MB. Max. memory is 11.5 GB. [2018-12-01 20:20:16,793 INFO L168 Benchmark]: Witness Printer took 36.40 ms. Allocated memory is still 1.2 GB. Free memory was 892.6 MB in the beginning and 887.8 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 11.5 GB. [2018-12-01 20:20:16,795 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 119.48 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 11.69 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 11.06 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 167.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 86.0 MB). Free memory was 938.8 MB in the beginning and 1.1 GB in the end (delta: -133.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2986.46 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 49.8 MB). Free memory was 1.1 GB in the beginning and 892.6 MB in the end (delta: 179.7 MB). Peak memory consumption was 229.5 MB. Max. memory is 11.5 GB. * Witness Printer took 36.40 ms. Allocated memory is still 1.2 GB. Free memory was 892.6 MB in the beginning and 887.8 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. 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, 2.9s OverallTime, 12 OverallIterations, 8 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 337 SDtfs, 211 SDslu, 1934 SDs, 0 SdLazy, 1350 SolverSat, 95 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 753 GetRequests, 609 SyntacticMatches, 8 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=11, 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, 12 MinimizatonAttempts, 66 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 116 PreInvPairs, 238 NumberOfFragments, 98 HoareAnnotationTreeSize, 116 FomulaSimplifications, 5390 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 393 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 1241 NumberOfCodeBlocks, 1211 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 1219 ConstructedInterpolants, 0 QuantifiedInterpolants, 157027 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1281 ConjunctsInSsa, 109 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 1326/1648 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...