./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.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_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/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 0f8f22ce4f3bf9068fc0240f174785871ced813b ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 13:17:06,523 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 13:17:06,524 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 13:17:06,530 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 13:17:06,530 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 13:17:06,531 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 13:17:06,531 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 13:17:06,532 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 13:17:06,533 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 13:17:06,533 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 13:17:06,533 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 13:17:06,534 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 13:17:06,534 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 13:17:06,534 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 13:17:06,535 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 13:17:06,535 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 13:17:06,536 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 13:17:06,536 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 13:17:06,537 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 13:17:06,538 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 13:17:06,538 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 13:17:06,539 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 13:17:06,540 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 13:17:06,540 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 13:17:06,540 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 13:17:06,541 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 13:17:06,541 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 13:17:06,541 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 13:17:06,542 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 13:17:06,542 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 13:17:06,542 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 13:17:06,543 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 13:17:06,543 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 13:17:06,543 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 13:17:06,543 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 13:17:06,544 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 13:17:06,544 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-01 13:17:06,551 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 13:17:06,551 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 13:17:06,551 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 13:17:06,551 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 13:17:06,552 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 13:17:06,552 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 13:17:06,552 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 13:17:06,552 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 13:17:06,552 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 13:17:06,552 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 13:17:06,552 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 13:17:06,552 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 13:17:06,553 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 13:17:06,553 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 13:17:06,553 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 13:17:06,553 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 13:17:06,553 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 13:17:06,553 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 13:17:06,553 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 13:17:06,553 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 13:17:06,553 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 13:17:06,553 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 13:17:06,554 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 13:17:06,554 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 13:17:06,554 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 13:17:06,554 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 13:17:06,554 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 13:17:06,554 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 13:17:06,554 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 13:17:06,554 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 13:17:06,554 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_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/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 -> 0f8f22ce4f3bf9068fc0240f174785871ced813b [2018-12-01 13:17:06,571 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 13:17:06,578 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 13:17:06,580 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 13:17:06,580 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 13:17:06,581 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 13:17:06,581 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.c [2018-12-01 13:17:06,615 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/bin-2019/uautomizer/data/fd2f87c33/8b8ff8356b814380891de26c8ca79e04/FLAG6fe9eb1e0 [2018-12-01 13:17:06,922 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 13:17:06,923 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/sv-benchmarks/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.c [2018-12-01 13:17:06,927 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/bin-2019/uautomizer/data/fd2f87c33/8b8ff8356b814380891de26c8ca79e04/FLAG6fe9eb1e0 [2018-12-01 13:17:07,348 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/bin-2019/uautomizer/data/fd2f87c33/8b8ff8356b814380891de26c8ca79e04 [2018-12-01 13:17:07,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 13:17:07,351 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 13:17:07,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 13:17:07,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 13:17:07,355 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 13:17:07,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 01:17:07" (1/1) ... [2018-12-01 13:17:07,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c1e788d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:17:07, skipping insertion in model container [2018-12-01 13:17:07,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 01:17:07" (1/1) ... [2018-12-01 13:17:07,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 13:17:07,372 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 13:17:07,457 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 13:17:07,459 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 13:17:07,468 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 13:17:07,476 INFO L195 MainTranslator]: Completed translation [2018-12-01 13:17:07,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:17:07 WrapperNode [2018-12-01 13:17:07,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 13:17:07,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 13:17:07,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 13:17:07,477 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 13:17:07,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:17:07" (1/1) ... [2018-12-01 13:17:07,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:17:07" (1/1) ... [2018-12-01 13:17:07,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 13:17:07,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 13:17:07,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 13:17:07,489 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 13:17:07,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:17:07" (1/1) ... [2018-12-01 13:17:07,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:17:07" (1/1) ... [2018-12-01 13:17:07,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:17:07" (1/1) ... [2018-12-01 13:17:07,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:17:07" (1/1) ... [2018-12-01 13:17:07,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:17:07" (1/1) ... [2018-12-01 13:17:07,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:17:07" (1/1) ... [2018-12-01 13:17:07,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:17:07" (1/1) ... [2018-12-01 13:17:07,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 13:17:07,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 13:17:07,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 13:17:07,499 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 13:17:07,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:17:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/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 13:17:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-12-01 13:17:07,564 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-12-01 13:17:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-01 13:17:07,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-01 13:17:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 13:17:07,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 13:17:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-01 13:17:07,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-01 13:17:07,649 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 13:17:07,649 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-01 13:17:07,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:17:07 BoogieIcfgContainer [2018-12-01 13:17:07,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 13:17:07,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 13:17:07,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 13:17:07,652 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 13:17:07,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 01:17:07" (1/3) ... [2018-12-01 13:17:07,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ee0ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 01:17:07, skipping insertion in model container [2018-12-01 13:17:07,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:17:07" (2/3) ... [2018-12-01 13:17:07,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ee0ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 01:17:07, skipping insertion in model container [2018-12-01 13:17:07,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:17:07" (3/3) ... [2018-12-01 13:17:07,654 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci01_true-unreach-call_true-no-overflow.c [2018-12-01 13:17:07,660 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 13:17:07,664 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-01 13:17:07,672 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-01 13:17:07,688 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 13:17:07,689 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 13:17:07,689 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 13:17:07,689 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 13:17:07,689 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 13:17:07,689 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 13:17:07,689 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 13:17:07,689 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 13:17:07,689 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 13:17:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-12-01 13:17:07,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-01 13:17:07,702 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:17:07,703 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:17:07,704 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:17:07,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:17:07,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2018-12-01 13:17:07,708 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:17:07,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:17:07,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:07,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:17:07,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:17:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:17:07,811 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 13:17:07,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-01 13:17:07,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 13:17:07,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 13:17:07,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-01 13:17:07,822 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2018-12-01 13:17:07,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:17:07,902 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-12-01 13:17:07,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 13:17:07,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-12-01 13:17:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:17:07,909 INFO L225 Difference]: With dead ends: 36 [2018-12-01 13:17:07,909 INFO L226 Difference]: Without dead ends: 22 [2018-12-01 13:17:07,911 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-12-01 13:17:07,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-01 13:17:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-12-01 13:17:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-01 13:17:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-12-01 13:17:07,935 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2018-12-01 13:17:07,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:17:07,936 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-12-01 13:17:07,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 13:17:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-12-01 13:17:07,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-01 13:17:07,937 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:17:07,937 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:17:07,937 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:17:07,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:17:07,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2018-12-01 13:17:07,937 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:17:07,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:17:07,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:07,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:17:07,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:17:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-01 13:17:07,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:17:07,989 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/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 13:17:07,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:17:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:17:08,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:17:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-01 13:17:08,049 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-01 13:17:08,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-12-01 13:17:08,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 13:17:08,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 13:17:08,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-01 13:17:08,050 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2018-12-01 13:17:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:17:08,092 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2018-12-01 13:17:08,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 13:17:08,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-12-01 13:17:08,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:17:08,092 INFO L225 Difference]: With dead ends: 39 [2018-12-01 13:17:08,093 INFO L226 Difference]: Without dead ends: 24 [2018-12-01 13:17:08,093 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-12-01 13:17:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-01 13:17:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-01 13:17:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-01 13:17:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-12-01 13:17:08,097 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2018-12-01 13:17:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:17:08,097 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-12-01 13:17:08,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 13:17:08,097 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-12-01 13:17:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-01 13:17:08,098 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:17:08,098 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:17:08,098 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:17:08,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:17:08,099 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2018-12-01 13:17:08,099 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:17:08,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:17:08,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:08,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:17:08,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:17:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-01 13:17:08,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:17:08,177 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/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 13:17:08,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:17:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:17:08,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:17:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-01 13:17:08,299 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:17:08,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-12-01 13:17:08,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-01 13:17:08,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-01 13:17:08,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-12-01 13:17:08,300 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 16 states. [2018-12-01 13:17:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:17:08,405 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2018-12-01 13:17:08,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-01 13:17:08,406 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2018-12-01 13:17:08,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:17:08,407 INFO L225 Difference]: With dead ends: 34 [2018-12-01 13:17:08,407 INFO L226 Difference]: Without dead ends: 30 [2018-12-01 13:17:08,407 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2018-12-01 13:17:08,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-01 13:17:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-12-01 13:17:08,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-01 13:17:08,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2018-12-01 13:17:08,412 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2018-12-01 13:17:08,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:17:08,412 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2018-12-01 13:17:08,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-01 13:17:08,412 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-12-01 13:17:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-01 13:17:08,413 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:17:08,413 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:17:08,413 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:17:08,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:17:08,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2018-12-01 13:17:08,414 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:17:08,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:17:08,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:08,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:17:08,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:17:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-01 13:17:08,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:17:08,492 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/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 13:17:08,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 13:17:08,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 13:17:08,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 13:17:08,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:17:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-01 13:17:08,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:17:08,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2018-12-01 13:17:08,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-01 13:17:08,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-01 13:17:08,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-01 13:17:08,559 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 11 states. [2018-12-01 13:17:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:17:08,653 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2018-12-01 13:17:08,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 13:17:08,653 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-01 13:17:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:17:08,654 INFO L225 Difference]: With dead ends: 54 [2018-12-01 13:17:08,654 INFO L226 Difference]: Without dead ends: 32 [2018-12-01 13:17:08,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-12-01 13:17:08,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-01 13:17:08,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2018-12-01 13:17:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-01 13:17:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2018-12-01 13:17:08,658 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 41 [2018-12-01 13:17:08,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:17:08,658 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2018-12-01 13:17:08,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-01 13:17:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2018-12-01 13:17:08,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-01 13:17:08,659 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:17:08,659 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:17:08,659 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:17:08,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:17:08,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 3 times [2018-12-01 13:17:08,660 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:17:08,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:17:08,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:08,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:17:08,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:17:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-01 13:17:08,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:17:08,759 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/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 13:17:08,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 13:17:08,774 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-01 13:17:08,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 13:17:08,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:17:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-01 13:17:08,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:17:08,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2018-12-01 13:17:08,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-01 13:17:08,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-01 13:17:08,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2018-12-01 13:17:08,879 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 20 states. [2018-12-01 13:17:09,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:17:09,041 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2018-12-01 13:17:09,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-01 13:17:09,041 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2018-12-01 13:17:09,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:17:09,042 INFO L225 Difference]: With dead ends: 42 [2018-12-01 13:17:09,042 INFO L226 Difference]: Without dead ends: 38 [2018-12-01 13:17:09,043 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2018-12-01 13:17:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-01 13:17:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2018-12-01 13:17:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-01 13:17:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2018-12-01 13:17:09,049 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 42 [2018-12-01 13:17:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:17:09,050 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2018-12-01 13:17:09,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-01 13:17:09,050 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2018-12-01 13:17:09,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-01 13:17:09,051 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:17:09,051 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:17:09,051 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:17:09,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:17:09,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1616597053, now seen corresponding path program 4 times [2018-12-01 13:17:09,052 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:17:09,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:17:09,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:09,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:17:09,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:17:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-12-01 13:17:09,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:17:09,098 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/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 13:17:09,105 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 13:17:09,116 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 13:17:09,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 13:17:09,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:17:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-12-01 13:17:09,137 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:17:09,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-01 13:17:09,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-01 13:17:09,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-01 13:17:09,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-01 13:17:09,138 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 7 states. [2018-12-01 13:17:09,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:17:09,202 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2018-12-01 13:17:09,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 13:17:09,202 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2018-12-01 13:17:09,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:17:09,203 INFO L225 Difference]: With dead ends: 60 [2018-12-01 13:17:09,203 INFO L226 Difference]: Without dead ends: 34 [2018-12-01 13:17:09,204 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-01 13:17:09,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-01 13:17:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2018-12-01 13:17:09,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-01 13:17:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2018-12-01 13:17:09,208 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 56 [2018-12-01 13:17:09,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:17:09,208 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2018-12-01 13:17:09,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-01 13:17:09,209 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2018-12-01 13:17:09,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-01 13:17:09,210 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:17:09,210 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:17:09,210 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:17:09,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:17:09,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1554048393, now seen corresponding path program 5 times [2018-12-01 13:17:09,210 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:17:09,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:17:09,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:09,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:17:09,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:17:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-12-01 13:17:09,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:17:09,286 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/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 13:17:09,292 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 13:17:09,299 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-12-01 13:17:09,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 13:17:09,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:17:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-12-01 13:17:09,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:17:09,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2018-12-01 13:17:09,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-01 13:17:09,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-01 13:17:09,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-12-01 13:17:09,337 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 12 states. [2018-12-01 13:17:09,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:17:09,442 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2018-12-01 13:17:09,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-01 13:17:09,442 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-12-01 13:17:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:17:09,443 INFO L225 Difference]: With dead ends: 63 [2018-12-01 13:17:09,443 INFO L226 Difference]: Without dead ends: 39 [2018-12-01 13:17:09,443 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2018-12-01 13:17:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-01 13:17:09,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-01 13:17:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-01 13:17:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2018-12-01 13:17:09,446 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 55 [2018-12-01 13:17:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:17:09,447 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2018-12-01 13:17:09,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-01 13:17:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2018-12-01 13:17:09,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-01 13:17:09,447 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 13:17:09,447 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 13:17:09,448 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 13:17:09,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:17:09,448 INFO L82 PathProgramCache]: Analyzing trace with hash -865837754, now seen corresponding path program 6 times [2018-12-01 13:17:09,448 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:17:09,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:17:09,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:09,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:17:09,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:17:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:17:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 13 proven. 91 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-12-01 13:17:09,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:17:09,541 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/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 13:17:09,547 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 13:17:09,561 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-12-01 13:17:09,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 13:17:09,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:17:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 44 proven. 63 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-12-01 13:17:09,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:17:09,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 24 [2018-12-01 13:17:09,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-01 13:17:09,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-01 13:17:09,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2018-12-01 13:17:09,734 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 24 states. [2018-12-01 13:17:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:17:09,970 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2018-12-01 13:17:09,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-01 13:17:09,971 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2018-12-01 13:17:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 13:17:09,971 INFO L225 Difference]: With dead ends: 49 [2018-12-01 13:17:09,971 INFO L226 Difference]: Without dead ends: 0 [2018-12-01 13:17:09,972 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2018-12-01 13:17:09,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-01 13:17:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-01 13:17:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-01 13:17:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-01 13:17:09,972 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2018-12-01 13:17:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 13:17:09,972 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 13:17:09,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-01 13:17:09,972 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-01 13:17:09,972 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-01 13:17:09,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-01 13:17:10,049 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-12-01 13:17:10,049 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-12-01 13:17:10,049 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 fibonacci_~n) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-12-01 13:17:10,049 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-12-01 13:17:10,049 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= 1 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 2) (<= 2 fibonacci_~n) .cse0) (and (<= |fibonacci_#in~n| fibonacci_~n) (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) (<= 3 fibonacci_~n) .cse0))) [2018-12-01 13:17:10,050 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-12-01 13:17:10,050 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-12-01 13:17:10,050 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-12-01 13:17:10,050 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-12-01 13:17:10,050 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-01 13:17:10,050 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-01 13:17:10,050 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-01 13:17:10,050 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-01 13:17:10,050 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-01 13:17:10,050 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-01 13:17:10,050 INFO L448 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2018-12-01 13:17:10,050 INFO L451 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: true [2018-12-01 13:17:10,050 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2018-12-01 13:17:10,050 INFO L448 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2018-12-01 13:17:10,050 INFO L448 ceAbstractionStarter]: For program point L27(lines 27 29) no Hoare annotation was computed. [2018-12-01 13:17:10,050 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2018-12-01 13:17:10,050 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2018-12-01 13:17:10,050 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2018-12-01 13:17:10,050 INFO L448 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-12-01 13:17:10,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 01:17:10 BoogieIcfgContainer [2018-12-01 13:17:10,052 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 13:17:10,052 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 13:17:10,052 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 13:17:10,053 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 13:17:10,053 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:17:07" (3/4) ... [2018-12-01 13:17:10,055 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-01 13:17:10,061 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-12-01 13:17:10,061 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-01 13:17:10,061 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-01 13:17:10,064 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-01 13:17:10,064 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-01 13:17:10,064 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-01 13:17:10,092 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_9172396b-2f79-48b4-a8f3-634c5b1d5bd7/bin-2019/uautomizer/witness.graphml [2018-12-01 13:17:10,093 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 13:17:10,093 INFO L168 Benchmark]: Toolchain (without parser) took 2742.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 953.3 MB in the beginning and 1.1 GB in the end (delta: -161.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:17:10,094 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:17:10,094 INFO L168 Benchmark]: CACSL2BoogieTranslator took 124.05 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-01 13:17:10,095 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.93 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:17:10,095 INFO L168 Benchmark]: Boogie Preprocessor took 9.81 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:17:10,095 INFO L168 Benchmark]: RCFGBuilder took 151.22 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 117.4 MB). Free memory was 942.6 MB in the beginning and 1.1 GB in the end (delta: -160.2 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. [2018-12-01 13:17:10,095 INFO L168 Benchmark]: TraceAbstraction took 2402.06 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 39.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -16.5 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2018-12-01 13:17:10,096 INFO L168 Benchmark]: Witness Printer took 40.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 11.5 GB. [2018-12-01 13:17:10,098 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 124.05 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 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 11.93 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.81 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 151.22 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 117.4 MB). Free memory was 942.6 MB in the beginning and 1.1 GB in the end (delta: -160.2 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2402.06 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 39.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -16.5 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Witness Printer took 40.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 2.3s OverallTime, 8 OverallIterations, 9 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 140 SDtfs, 140 SDslu, 706 SDs, 0 SdLazy, 1032 SolverSat, 126 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 454 GetRequests, 318 SyntacticMatches, 4 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 13 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 56 PreInvPairs, 74 NumberOfFragments, 45 HoareAnnotationTreeSize, 56 FomulaSimplifications, 135 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 154 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 650 NumberOfCodeBlocks, 609 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 635 ConstructedInterpolants, 0 QuantifiedInterpolants, 71399 SizeOfPredicates, 25 NumberOfNonLiveVariables, 627 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 694/1056 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...