./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_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/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_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/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 [2018-12-09 02:47:17,728 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 02:47:17,729 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 02:47:17,735 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 02:47:17,735 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 02:47:17,735 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 02:47:17,736 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 02:47:17,737 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 02:47:17,738 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 02:47:17,739 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 02:47:17,739 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 02:47:17,739 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 02:47:17,740 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 02:47:17,740 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 02:47:17,741 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 02:47:17,741 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 02:47:17,741 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 02:47:17,742 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 02:47:17,743 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 02:47:17,744 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 02:47:17,745 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 02:47:17,745 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 02:47:17,746 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 02:47:17,746 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 02:47:17,746 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 02:47:17,747 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 02:47:17,747 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 02:47:17,748 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 02:47:17,748 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 02:47:17,749 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 02:47:17,749 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 02:47:17,749 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 02:47:17,749 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 02:47:17,749 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 02:47:17,750 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 02:47:17,750 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 02:47:17,750 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-09 02:47:17,758 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 02:47:17,758 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 02:47:17,758 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 02:47:17,758 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 02:47:17,759 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 02:47:17,759 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 02:47:17,759 INFO L133 SettingsManager]: * Use SBE=true [2018-12-09 02:47:17,759 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 02:47:17,759 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 02:47:17,759 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 02:47:17,759 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 02:47:17,759 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 02:47:17,760 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 02:47:17,760 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 02:47:17,760 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 02:47:17,760 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 02:47:17,760 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 02:47:17,760 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 02:47:17,760 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 02:47:17,760 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 02:47:17,760 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 02:47:17,760 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 02:47:17,760 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 02:47:17,761 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 02:47:17,761 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 02:47:17,761 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 02:47:17,761 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 02:47:17,761 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-09 02:47:17,761 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 02:47:17,761 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 02:47:17,761 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_23426662-d0f6-4b32-8ad2-ef355bb48908/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 [2018-12-09 02:47:17,779 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 02:47:17,787 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 02:47:17,789 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 02:47:17,790 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 02:47:17,790 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 02:47:17,790 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.c [2018-12-09 02:47:17,827 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/data/9ea8ecb97/8fcfe529fca54d66a366a11d6820eac5/FLAG512cb185d [2018-12-09 02:47:18,268 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 02:47:18,268 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/sv-benchmarks/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.c [2018-12-09 02:47:18,271 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/data/9ea8ecb97/8fcfe529fca54d66a366a11d6820eac5/FLAG512cb185d [2018-12-09 02:47:18,279 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/data/9ea8ecb97/8fcfe529fca54d66a366a11d6820eac5 [2018-12-09 02:47:18,281 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 02:47:18,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 02:47:18,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 02:47:18,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 02:47:18,284 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 02:47:18,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:47:18" (1/1) ... [2018-12-09 02:47:18,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@870cb06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:47:18, skipping insertion in model container [2018-12-09 02:47:18,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:47:18" (1/1) ... [2018-12-09 02:47:18,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 02:47:18,298 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 02:47:18,381 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 02:47:18,383 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 02:47:18,392 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 02:47:18,399 INFO L195 MainTranslator]: Completed translation [2018-12-09 02:47:18,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:47:18 WrapperNode [2018-12-09 02:47:18,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 02:47:18,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 02:47:18,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 02:47:18,400 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 02:47:18,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:47:18" (1/1) ... [2018-12-09 02:47:18,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:47:18" (1/1) ... [2018-12-09 02:47:18,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 02:47:18,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 02:47:18,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 02:47:18,412 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 02:47:18,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:47:18" (1/1) ... [2018-12-09 02:47:18,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:47:18" (1/1) ... [2018-12-09 02:47:18,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:47:18" (1/1) ... [2018-12-09 02:47:18,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:47:18" (1/1) ... [2018-12-09 02:47:18,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:47:18" (1/1) ... [2018-12-09 02:47:18,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:47:18" (1/1) ... [2018-12-09 02:47:18,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:47:18" (1/1) ... [2018-12-09 02:47:18,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 02:47:18,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 02:47:18,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 02:47:18,422 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 02:47:18,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:47:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 02:47:18,488 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-12-09 02:47:18,488 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-12-09 02:47:18,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 02:47:18,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 02:47:18,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 02:47:18,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 02:47:18,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 02:47:18,489 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 02:47:18,572 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 02:47:18,572 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-09 02:47:18,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:47:18 BoogieIcfgContainer [2018-12-09 02:47:18,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 02:47:18,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 02:47:18,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 02:47:18,575 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 02:47:18,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:47:18" (1/3) ... [2018-12-09 02:47:18,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e17fceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:47:18, skipping insertion in model container [2018-12-09 02:47:18,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:47:18" (2/3) ... [2018-12-09 02:47:18,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e17fceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:47:18, skipping insertion in model container [2018-12-09 02:47:18,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:47:18" (3/3) ... [2018-12-09 02:47:18,577 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci01_true-unreach-call_true-no-overflow.c [2018-12-09 02:47:18,583 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 02:47:18,587 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 02:47:18,597 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 02:47:18,614 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 02:47:18,615 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 02:47:18,615 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 02:47:18,615 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 02:47:18,615 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 02:47:18,615 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 02:47:18,615 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 02:47:18,616 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 02:47:18,616 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 02:47:18,626 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-12-09 02:47:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 02:47:18,630 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:47:18,631 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 02:47:18,632 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:47:18,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:47:18,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2018-12-09 02:47:18,637 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 02:47:18,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 02:47:18,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:18,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:47:18,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:47:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:47:18,744 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 02:47:18,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-09 02:47:18,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 02:47:18,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 02:47:18,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-09 02:47:18,756 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2018-12-09 02:47:18,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:47:18,844 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-12-09 02:47:18,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 02:47:18,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-12-09 02:47:18,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:47:18,851 INFO L225 Difference]: With dead ends: 36 [2018-12-09 02:47:18,851 INFO L226 Difference]: Without dead ends: 22 [2018-12-09 02:47:18,853 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 [2018-12-09 02:47:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-09 02:47:18,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-12-09 02:47:18,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-09 02:47:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-12-09 02:47:18,877 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2018-12-09 02:47:18,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:47:18,877 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-12-09 02:47:18,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 02:47:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-12-09 02:47:18,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-09 02:47:18,879 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:47:18,879 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] [2018-12-09 02:47:18,879 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:47:18,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:47:18,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2018-12-09 02:47:18,879 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 02:47:18,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 02:47:18,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:18,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:47:18,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:47:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 02:47:18,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:47:18,933 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 02:47:18,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:47:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:47:18,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:47:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 02:47:18,995 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-09 02:47:18,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-12-09 02:47:18,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 02:47:18,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 02:47:18,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-09 02:47:18,996 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2018-12-09 02:47:19,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:47:19,045 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2018-12-09 02:47:19,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 02:47:19,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-12-09 02:47:19,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:47:19,046 INFO L225 Difference]: With dead ends: 39 [2018-12-09 02:47:19,046 INFO L226 Difference]: Without dead ends: 24 [2018-12-09 02:47:19,047 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 [2018-12-09 02:47:19,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-09 02:47:19,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-09 02:47:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-09 02:47:19,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-12-09 02:47:19,050 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2018-12-09 02:47:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:47:19,051 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-12-09 02:47:19,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 02:47:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-12-09 02:47:19,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-09 02:47:19,051 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:47:19,052 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] [2018-12-09 02:47:19,052 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:47:19,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:47:19,052 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2018-12-09 02:47:19,052 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 02:47:19,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 02:47:19,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:19,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:47:19,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:47:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-09 02:47:19,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:47:19,115 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 02:47:19,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:47:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:47:19,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:47:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-09 02:47:19,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 02:47:19,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-12-09 02:47:19,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-09 02:47:19,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-09 02:47:19,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-12-09 02:47:19,224 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 16 states. [2018-12-09 02:47:19,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:47:19,347 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2018-12-09 02:47:19,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 02:47:19,348 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2018-12-09 02:47:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:47:19,349 INFO L225 Difference]: With dead ends: 34 [2018-12-09 02:47:19,349 INFO L226 Difference]: Without dead ends: 30 [2018-12-09 02:47:19,350 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 [2018-12-09 02:47:19,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-09 02:47:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-12-09 02:47:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-09 02:47:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2018-12-09 02:47:19,356 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2018-12-09 02:47:19,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:47:19,356 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2018-12-09 02:47:19,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-09 02:47:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-12-09 02:47:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-09 02:47:19,358 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:47:19,358 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] [2018-12-09 02:47:19,358 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:47:19,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:47:19,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2018-12-09 02:47:19,358 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 02:47:19,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 02:47:19,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:19,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:47:19,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:47:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 02:47:19,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:47:19,437 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 02:47:19,443 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 02:47:19,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 02:47:19,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 02:47:19,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:47:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 02:47:19,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 02:47:19,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2018-12-09 02:47:19,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 02:47:19,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 02:47:19,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-09 02:47:19,493 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 11 states. [2018-12-09 02:47:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:47:19,576 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2018-12-09 02:47:19,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 02:47:19,576 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-09 02:47:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:47:19,577 INFO L225 Difference]: With dead ends: 54 [2018-12-09 02:47:19,577 INFO L226 Difference]: Without dead ends: 32 [2018-12-09 02:47:19,577 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-12-09 02:47:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-09 02:47:19,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2018-12-09 02:47:19,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-09 02:47:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2018-12-09 02:47:19,581 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 41 [2018-12-09 02:47:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:47:19,582 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2018-12-09 02:47:19,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 02:47:19,582 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2018-12-09 02:47:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-09 02:47:19,582 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:47:19,583 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] [2018-12-09 02:47:19,583 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:47:19,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:47:19,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 3 times [2018-12-09 02:47:19,583 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 02:47:19,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 02:47:19,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:19,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 02:47:19,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:47:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 02:47:19,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:47:19,659 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 02:47:19,665 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 02:47:19,673 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 02:47:19,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 02:47:19,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:47:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 02:47:19,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 02:47:19,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2018-12-09 02:47:19,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-09 02:47:19,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-09 02:47:19,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2018-12-09 02:47:19,782 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 20 states. [2018-12-09 02:47:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:47:19,953 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2018-12-09 02:47:19,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-09 02:47:19,953 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2018-12-09 02:47:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:47:19,954 INFO L225 Difference]: With dead ends: 42 [2018-12-09 02:47:19,954 INFO L226 Difference]: Without dead ends: 38 [2018-12-09 02:47:19,955 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2018-12-09 02:47:19,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-09 02:47:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2018-12-09 02:47:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-09 02:47:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2018-12-09 02:47:19,959 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 42 [2018-12-09 02:47:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:47:19,960 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2018-12-09 02:47:19,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-09 02:47:19,960 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2018-12-09 02:47:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-12-09 02:47:19,961 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:47:19,961 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] [2018-12-09 02:47:19,961 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:47:19,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:47:19,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1616597053, now seen corresponding path program 4 times [2018-12-09 02:47:19,961 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 02:47:19,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 02:47:19,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:19,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 02:47:19,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:47:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-12-09 02:47:20,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:47:20,014 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 02:47:20,020 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 02:47:20,029 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 02:47:20,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 02:47:20,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:47:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-12-09 02:47:20,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 02:47:20,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-09 02:47:20,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 02:47:20,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 02:47:20,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-09 02:47:20,052 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 7 states. [2018-12-09 02:47:20,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:47:20,131 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2018-12-09 02:47:20,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 02:47:20,131 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2018-12-09 02:47:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:47:20,132 INFO L225 Difference]: With dead ends: 60 [2018-12-09 02:47:20,132 INFO L226 Difference]: Without dead ends: 34 [2018-12-09 02:47:20,132 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 [2018-12-09 02:47:20,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-09 02:47:20,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2018-12-09 02:47:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-09 02:47:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2018-12-09 02:47:20,136 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 56 [2018-12-09 02:47:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:47:20,136 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2018-12-09 02:47:20,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 02:47:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2018-12-09 02:47:20,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-09 02:47:20,136 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:47:20,137 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] [2018-12-09 02:47:20,137 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:47:20,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:47:20,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1554048393, now seen corresponding path program 5 times [2018-12-09 02:47:20,137 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 02:47:20,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 02:47:20,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:20,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 02:47:20,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:47:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-12-09 02:47:20,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:47:20,208 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 02:47:20,214 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-09 02:47:20,225 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-12-09 02:47:20,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 02:47:20,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:47:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-12-09 02:47:20,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 02:47:20,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2018-12-09 02:47:20,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 02:47:20,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 02:47:20,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-12-09 02:47:20,264 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 12 states. [2018-12-09 02:47:20,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:47:20,365 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2018-12-09 02:47:20,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-09 02:47:20,365 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-12-09 02:47:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:47:20,366 INFO L225 Difference]: With dead ends: 63 [2018-12-09 02:47:20,366 INFO L226 Difference]: Without dead ends: 39 [2018-12-09 02:47:20,366 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 [2018-12-09 02:47:20,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-09 02:47:20,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-09 02:47:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-09 02:47:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2018-12-09 02:47:20,370 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 55 [2018-12-09 02:47:20,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:47:20,370 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2018-12-09 02:47:20,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 02:47:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2018-12-09 02:47:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-09 02:47:20,371 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:47:20,371 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 02:47:20,371 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:47:20,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:47:20,371 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 6 times [2018-12-09 02:47:20,371 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 02:47:20,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 02:47:20,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:20,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 02:47:20,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:47:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-12-09 02:47:20,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:47:20,457 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 02:47:20,463 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-09 02:47:20,484 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-12-09 02:47:20,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 02:47:20,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:47:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 146 proven. 67 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2018-12-09 02:47:20,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 02:47:20,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 25 [2018-12-09 02:47:20,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-09 02:47:20,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-09 02:47:20,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2018-12-09 02:47:20,664 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 25 states. [2018-12-09 02:47:20,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:47:20,949 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2018-12-09 02:47:20,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-09 02:47:20,949 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-12-09 02:47:20,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:47:20,950 INFO L225 Difference]: With dead ends: 74 [2018-12-09 02:47:20,950 INFO L226 Difference]: Without dead ends: 42 [2018-12-09 02:47:20,950 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2018-12-09 02:47:20,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-09 02:47:20,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-12-09 02:47:20,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-09 02:47:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2018-12-09 02:47:20,954 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 97 [2018-12-09 02:47:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:47:20,955 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2018-12-09 02:47:20,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-09 02:47:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2018-12-09 02:47:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-09 02:47:20,955 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:47:20,956 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] [2018-12-09 02:47:20,956 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:47:20,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:47:20,956 INFO L82 PathProgramCache]: Analyzing trace with hash -865837754, now seen corresponding path program 7 times [2018-12-09 02:47:20,956 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 02:47:20,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 02:47:20,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:20,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 02:47:20,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:47:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:47:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 13 proven. 91 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-12-09 02:47:21,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:47:21,062 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 02:47:21,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:47:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:47:21,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:47:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 25 proven. 92 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-12-09 02:47:21,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 02:47:21,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 27 [2018-12-09 02:47:21,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-09 02:47:21,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-09 02:47:21,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2018-12-09 02:47:21,267 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 27 states. [2018-12-09 02:47:21,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:47:21,598 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2018-12-09 02:47:21,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-09 02:47:21,598 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2018-12-09 02:47:21,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:47:21,599 INFO L225 Difference]: With dead ends: 49 [2018-12-09 02:47:21,599 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 02:47:21,599 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=1409, Unknown=0, NotChecked=0, Total=1640 [2018-12-09 02:47:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 02:47:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 02:47:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 02:47:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 02:47:21,600 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2018-12-09 02:47:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:47:21,600 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 02:47:21,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-09 02:47:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 02:47:21,600 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 02:47:21,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 02:47:21,708 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-12-09 02:47:21,708 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-12-09 02:47:21,708 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|)) [2018-12-09 02:47:21,708 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-12-09 02:47:21,708 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (and (let ((.cse0 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse1 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= 4 fibonacci_~n) .cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) .cse1) (and .cse0 (<= 1 |fibonacci_#t~ret0|) (<= fibonacci_~n 3) .cse1))) (< 1 |fibonacci_#in~n|)) [2018-12-09 02:47:21,708 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-12-09 02:47:21,709 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-12-09 02:47:21,709 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-12-09 02:47:21,709 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-12-09 02:47:21,709 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 02:47:21,709 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 02:47:21,709 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 02:47:21,709 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 02:47:21,709 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 02:47:21,709 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 02:47:21,709 INFO L448 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2018-12-09 02:47:21,709 INFO L451 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: true [2018-12-09 02:47:21,709 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2018-12-09 02:47:21,709 INFO L448 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2018-12-09 02:47:21,709 INFO L448 ceAbstractionStarter]: For program point L27(lines 27 29) no Hoare annotation was computed. [2018-12-09 02:47:21,709 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2018-12-09 02:47:21,709 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2018-12-09 02:47:21,709 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2018-12-09 02:47:21,709 INFO L448 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-12-09 02:47:21,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 02:47:21 BoogieIcfgContainer [2018-12-09 02:47:21,711 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 02:47:21,711 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 02:47:21,711 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 02:47:21,711 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 02:47:21,712 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:47:18" (3/4) ... [2018-12-09 02:47:21,714 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 02:47:21,718 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-12-09 02:47:21,718 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 02:47:21,719 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 02:47:21,721 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-09 02:47:21,721 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-09 02:47:21,721 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 02:47:21,747 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_23426662-d0f6-4b32-8ad2-ef355bb48908/bin-2019/uautomizer/witness.graphml [2018-12-09 02:47:21,747 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 02:47:21,747 INFO L168 Benchmark]: Toolchain (without parser) took 3466.36 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 306.2 MB). Free memory was 962.4 MB in the beginning and 1.3 GB in the end (delta: -310.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 02:47:21,748 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 02:47:21,748 INFO L168 Benchmark]: CACSL2BoogieTranslator took 117.71 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 02:47:21,748 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.71 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 02:47:21,749 INFO L168 Benchmark]: Boogie Preprocessor took 10.29 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 02:47:21,749 INFO L168 Benchmark]: RCFGBuilder took 150.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.7 MB). Free memory was 951.7 MB in the beginning and 1.1 GB in the end (delta: -152.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-09 02:47:21,749 INFO L168 Benchmark]: TraceAbstraction took 3138.20 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 182.5 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -168.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 11.5 GB. [2018-12-09 02:47:21,749 INFO L168 Benchmark]: Witness Printer took 35.51 ms. Allocated memory is still 1.3 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 02:47:21,750 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 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 117.71 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 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 11.71 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.29 ms. Allocated memory is still 1.0 GB. Free memory is still 951.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 150.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.7 MB). Free memory was 951.7 MB in the beginning and 1.1 GB in the end (delta: -152.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3138.20 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 182.5 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -168.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 11.5 GB. * Witness Printer took 35.51 ms. Allocated memory is still 1.3 GB. Free memory is still 1.3 GB. There was no memory consumed. 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, 3.1s OverallTime, 9 OverallIterations, 13 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 160 SDtfs, 167 SDslu, 876 SDs, 0 SdLazy, 1371 SolverSat, 183 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 577 GetRequests, 399 SyntacticMatches, 4 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=8, 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, 9 MinimizatonAttempts, 13 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 68 PreInvPairs, 86 NumberOfFragments, 50 HoareAnnotationTreeSize, 68 FomulaSimplifications, 53 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 321 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 844 NumberOfCodeBlocks, 795 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 827 ConstructedInterpolants, 0 QuantifiedInterpolants, 115915 SizeOfPredicates, 31 NumberOfNonLiveVariables, 829 ConjunctsInSsa, 121 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 1424/1910 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...