./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.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 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/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_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/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 0.1.23-5842f4b [2018-11-18 10:03:39,580 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 10:03:39,581 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 10:03:39,588 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 10:03:39,589 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 10:03:39,590 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 10:03:39,591 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 10:03:39,592 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 10:03:39,593 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 10:03:39,594 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 10:03:39,595 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 10:03:39,595 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 10:03:39,596 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 10:03:39,597 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 10:03:39,598 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 10:03:39,599 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 10:03:39,600 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 10:03:39,601 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 10:03:39,603 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 10:03:39,604 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 10:03:39,605 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 10:03:39,606 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 10:03:39,607 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 10:03:39,608 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 10:03:39,608 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 10:03:39,608 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 10:03:39,609 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 10:03:39,610 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 10:03:39,611 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 10:03:39,612 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 10:03:39,612 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 10:03:39,612 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 10:03:39,613 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 10:03:39,613 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 10:03:39,614 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 10:03:39,615 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 10:03:39,615 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-18 10:03:39,625 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 10:03:39,625 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 10:03:39,626 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 10:03:39,626 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 10:03:39,627 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 10:03:39,627 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 10:03:39,627 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 10:03:39,628 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 10:03:39,628 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 10:03:39,628 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 10:03:39,628 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 10:03:39,628 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 10:03:39,628 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 10:03:39,629 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 10:03:39,629 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 10:03:39,629 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 10:03:39,629 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 10:03:39,629 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 10:03:39,629 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 10:03:39,629 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 10:03:39,630 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 10:03:39,630 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 10:03:39,630 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 10:03:39,630 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:03:39,630 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 10:03:39,630 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 10:03:39,630 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 10:03:39,631 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 10:03:39,631 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 10:03:39,631 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 10:03:39,631 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_97709616-68c7-4343-bd63-d63a245debfa/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 [2018-11-18 10:03:39,660 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 10:03:39,669 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 10:03:39,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 10:03:39,672 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 10:03:39,672 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 10:03:39,673 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.c [2018-11-18 10:03:39,711 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/data/8bc3ffe5a/12b18252613b47859b631d17b8098857/FLAGa186f0f9e [2018-11-18 10:03:40,040 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 10:03:40,041 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/sv-benchmarks/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.c [2018-11-18 10:03:40,046 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/data/8bc3ffe5a/12b18252613b47859b631d17b8098857/FLAGa186f0f9e [2018-11-18 10:03:40,470 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/data/8bc3ffe5a/12b18252613b47859b631d17b8098857 [2018-11-18 10:03:40,472 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 10:03:40,472 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 10:03:40,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 10:03:40,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 10:03:40,476 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 10:03:40,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:03:40" (1/1) ... [2018-11-18 10:03:40,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f2a664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:03:40, skipping insertion in model container [2018-11-18 10:03:40,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:03:40" (1/1) ... [2018-11-18 10:03:40,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 10:03:40,495 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 10:03:40,589 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:03:40,591 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 10:03:40,602 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:03:40,610 INFO L195 MainTranslator]: Completed translation [2018-11-18 10:03:40,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:03:40 WrapperNode [2018-11-18 10:03:40,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 10:03:40,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 10:03:40,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 10:03:40,611 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 10:03:40,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:03:40" (1/1) ... [2018-11-18 10:03:40,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:03:40" (1/1) ... [2018-11-18 10:03:40,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:03:40" (1/1) ... [2018-11-18 10:03:40,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:03:40" (1/1) ... [2018-11-18 10:03:40,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:03:40" (1/1) ... [2018-11-18 10:03:40,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:03:40" (1/1) ... [2018-11-18 10:03:40,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:03:40" (1/1) ... [2018-11-18 10:03:40,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 10:03:40,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 10:03:40,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 10:03:40,626 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 10:03:40,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:03:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:03:40,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 10:03:40,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 10:03:40,691 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-18 10:03:40,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 10:03:40,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 10:03:40,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 10:03:40,691 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-18 10:03:40,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 10:03:40,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 10:03:40,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 10:03:40,790 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 10:03:40,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:03:40 BoogieIcfgContainer [2018-11-18 10:03:40,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 10:03:40,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 10:03:40,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 10:03:40,792 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 10:03:40,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 10:03:40" (1/3) ... [2018-11-18 10:03:40,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f996f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:03:40, skipping insertion in model container [2018-11-18 10:03:40,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:03:40" (2/3) ... [2018-11-18 10:03:40,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f996f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:03:40, skipping insertion in model container [2018-11-18 10:03:40,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:03:40" (3/3) ... [2018-11-18 10:03:40,794 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci01_true-unreach-call_true-no-overflow.c [2018-11-18 10:03:40,800 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 10:03:40,805 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 10:03:40,813 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 10:03:40,831 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 10:03:40,831 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 10:03:40,831 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 10:03:40,831 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 10:03:40,832 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 10:03:40,832 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 10:03:40,832 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 10:03:40,832 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 10:03:40,832 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 10:03:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-18 10:03:40,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 10:03:40,845 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:03:40,845 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:03:40,846 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:03:40,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:03:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2018-11-18 10:03:40,851 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:03:40,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:03:40,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:40,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:03:40,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:03:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:03:40,983 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:03:40,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-18 10:03:40,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 10:03:40,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 10:03:40,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-18 10:03:40,994 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2018-11-18 10:03:41,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:03:41,097 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-11-18 10:03:41,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 10:03:41,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-11-18 10:03:41,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:03:41,105 INFO L225 Difference]: With dead ends: 36 [2018-11-18 10:03:41,105 INFO L226 Difference]: Without dead ends: 22 [2018-11-18 10:03:41,107 INFO L604 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 [2018-11-18 10:03:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-18 10:03:41,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-18 10:03:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-18 10:03:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-11-18 10:03:41,135 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2018-11-18 10:03:41,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:03:41,135 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-11-18 10:03:41,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 10:03:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-11-18 10:03:41,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 10:03:41,137 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:03:41,137 INFO L375 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] [2018-11-18 10:03:41,137 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:03:41,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:03:41,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2018-11-18 10:03:41,137 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:03:41,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:03:41,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:41,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:03:41,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:03:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 10:03:41,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:03:41,213 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:03:41,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:03:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:03:41,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:03:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 10:03:41,314 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 10:03:41,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-11-18 10:03:41,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 10:03:41,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 10:03:41,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 10:03:41,316 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2018-11-18 10:03:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:03:41,371 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2018-11-18 10:03:41,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 10:03:41,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-18 10:03:41,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:03:41,372 INFO L225 Difference]: With dead ends: 39 [2018-11-18 10:03:41,373 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 10:03:41,373 INFO L604 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 [2018-11-18 10:03:41,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 10:03:41,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 10:03:41,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 10:03:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-11-18 10:03:41,378 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2018-11-18 10:03:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:03:41,379 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-11-18 10:03:41,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 10:03:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-11-18 10:03:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-18 10:03:41,380 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:03:41,380 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:03:41,380 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:03:41,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:03:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2018-11-18 10:03:41,381 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:03:41,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:03:41,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:41,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:03:41,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:03:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 10:03:41,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:03:41,501 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:03:41,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:03:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:03:41,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:03:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 10:03:41,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:03:41,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-11-18 10:03:41,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 10:03:41,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 10:03:41,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-11-18 10:03:41,655 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 16 states. [2018-11-18 10:03:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:03:41,779 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2018-11-18 10:03:41,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 10:03:41,780 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2018-11-18 10:03:41,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:03:41,781 INFO L225 Difference]: With dead ends: 34 [2018-11-18 10:03:41,781 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 10:03:41,782 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2018-11-18 10:03:41,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 10:03:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-11-18 10:03:41,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-18 10:03:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2018-11-18 10:03:41,788 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2018-11-18 10:03:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:03:41,789 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2018-11-18 10:03:41,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 10:03:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-11-18 10:03:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 10:03:41,790 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:03:41,790 INFO L375 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] [2018-11-18 10:03:41,791 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:03:41,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:03:41,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2018-11-18 10:03:41,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:03:41,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:03:41,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:41,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:03:41,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:03:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 10:03:41,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:03:41,892 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:03:41,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 10:03:41,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 10:03:41,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:03:41,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:03:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 10:03:41,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:03:41,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2018-11-18 10:03:41,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 10:03:41,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 10:03:41,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-11-18 10:03:41,976 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 11 states. [2018-11-18 10:03:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:03:42,066 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2018-11-18 10:03:42,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 10:03:42,066 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-18 10:03:42,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:03:42,068 INFO L225 Difference]: With dead ends: 54 [2018-11-18 10:03:42,068 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 10:03:42,069 INFO L604 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 [2018-11-18 10:03:42,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 10:03:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2018-11-18 10:03:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-18 10:03:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2018-11-18 10:03:42,074 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 41 [2018-11-18 10:03:42,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:03:42,075 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2018-11-18 10:03:42,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 10:03:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2018-11-18 10:03:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-18 10:03:42,076 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:03:42,076 INFO L375 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] [2018-11-18 10:03:42,077 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:03:42,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:03:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 3 times [2018-11-18 10:03:42,077 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:03:42,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:03:42,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:42,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:03:42,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:03:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 10:03:42,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:03:42,187 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:03:42,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:03:42,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 10:03:42,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:03:42,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:03:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 10:03:42,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:03:42,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2018-11-18 10:03:42,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-18 10:03:42,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 10:03:42,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2018-11-18 10:03:42,318 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 20 states. [2018-11-18 10:03:42,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:03:42,490 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2018-11-18 10:03:42,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 10:03:42,490 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2018-11-18 10:03:42,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:03:42,491 INFO L225 Difference]: With dead ends: 42 [2018-11-18 10:03:42,491 INFO L226 Difference]: Without dead ends: 38 [2018-11-18 10:03:42,492 INFO L604 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 [2018-11-18 10:03:42,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-18 10:03:42,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2018-11-18 10:03:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-18 10:03:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2018-11-18 10:03:42,497 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 42 [2018-11-18 10:03:42,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:03:42,498 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2018-11-18 10:03:42,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-18 10:03:42,498 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2018-11-18 10:03:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-18 10:03:42,499 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:03:42,499 INFO L375 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] [2018-11-18 10:03:42,500 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:03:42,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:03:42,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1616597053, now seen corresponding path program 4 times [2018-11-18 10:03:42,500 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:03:42,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:03:42,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:42,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:03:42,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:03:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-18 10:03:42,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:03:42,553 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:03:42,559 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 10:03:42,570 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 10:03:42,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:03:42,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:03:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-18 10:03:42,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:03:42,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-18 10:03:42,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 10:03:42,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 10:03:42,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 10:03:42,600 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 7 states. [2018-11-18 10:03:42,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:03:42,672 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2018-11-18 10:03:42,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 10:03:42,673 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2018-11-18 10:03:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:03:42,673 INFO L225 Difference]: With dead ends: 60 [2018-11-18 10:03:42,673 INFO L226 Difference]: Without dead ends: 34 [2018-11-18 10:03:42,674 INFO L604 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 [2018-11-18 10:03:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-18 10:03:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2018-11-18 10:03:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-18 10:03:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2018-11-18 10:03:42,677 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 56 [2018-11-18 10:03:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:03:42,677 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2018-11-18 10:03:42,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 10:03:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2018-11-18 10:03:42,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-18 10:03:42,678 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:03:42,679 INFO L375 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] [2018-11-18 10:03:42,679 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:03:42,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:03:42,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1554048393, now seen corresponding path program 5 times [2018-11-18 10:03:42,679 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:03:42,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:03:42,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:42,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:03:42,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:03:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-18 10:03:42,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:03:42,763 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:03:42,769 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-18 10:03:42,778 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-11-18 10:03:42,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:03:42,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:03:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-18 10:03:42,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:03:42,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2018-11-18 10:03:42,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 10:03:42,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 10:03:42,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-11-18 10:03:42,823 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 12 states. [2018-11-18 10:03:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:03:42,916 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2018-11-18 10:03:42,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 10:03:42,917 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-18 10:03:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:03:42,918 INFO L225 Difference]: With dead ends: 63 [2018-11-18 10:03:42,918 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 10:03:42,919 INFO L604 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 [2018-11-18 10:03:42,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 10:03:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-18 10:03:42,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 10:03:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2018-11-18 10:03:42,923 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 55 [2018-11-18 10:03:42,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:03:42,923 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2018-11-18 10:03:42,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 10:03:42,923 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2018-11-18 10:03:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-18 10:03:42,925 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:03:42,925 INFO L375 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] [2018-11-18 10:03:42,925 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:03:42,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:03:42,925 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 6 times [2018-11-18 10:03:42,925 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:03:42,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:03:42,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:42,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:03:42,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:03:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-18 10:03:43,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:03:43,032 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:03:43,038 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-18 10:03:43,059 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-11-18 10:03:43,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:03:43,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:03:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 146 proven. 67 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2018-11-18 10:03:43,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:03:43,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 25 [2018-11-18 10:03:43,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-18 10:03:43,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-18 10:03:43,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2018-11-18 10:03:43,278 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 25 states. [2018-11-18 10:03:43,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:03:43,584 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2018-11-18 10:03:43,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 10:03:43,585 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-11-18 10:03:43,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:03:43,585 INFO L225 Difference]: With dead ends: 74 [2018-11-18 10:03:43,585 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 10:03:43,586 INFO L604 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 [2018-11-18 10:03:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 10:03:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-18 10:03:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 10:03:43,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2018-11-18 10:03:43,591 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 97 [2018-11-18 10:03:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:03:43,592 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2018-11-18 10:03:43,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-18 10:03:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2018-11-18 10:03:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-11-18 10:03:43,593 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:03:43,593 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:03:43,593 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:03:43,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:03:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1611334083, now seen corresponding path program 7 times [2018-11-18 10:03:43,594 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:03:43,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:03:43,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:43,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:03:43,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:03:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 101 proven. 76 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-11-18 10:03:43,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:03:43,684 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/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 [2018-11-18 10:03:43,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:03:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:03:43,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:03:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 74 proven. 118 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-11-18 10:03:43,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:03:43,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2018-11-18 10:03:43,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 10:03:43,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 10:03:43,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-11-18 10:03:43,789 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 14 states. [2018-11-18 10:03:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:03:43,986 INFO L93 Difference]: Finished difference Result 89 states and 116 transitions. [2018-11-18 10:03:43,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 10:03:43,986 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2018-11-18 10:03:43,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:03:43,988 INFO L225 Difference]: With dead ends: 89 [2018-11-18 10:03:43,988 INFO L226 Difference]: Without dead ends: 54 [2018-11-18 10:03:43,989 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2018-11-18 10:03:43,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-18 10:03:43,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2018-11-18 10:03:43,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 10:03:43,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2018-11-18 10:03:43,994 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 83 [2018-11-18 10:03:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:03:43,994 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2018-11-18 10:03:43,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 10:03:43,995 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2018-11-18 10:03:43,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-18 10:03:43,995 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:03:43,995 INFO L375 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] [2018-11-18 10:03:43,996 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:03:43,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:03:43,996 INFO L82 PathProgramCache]: Analyzing trace with hash -865837754, now seen corresponding path program 8 times [2018-11-18 10:03:43,996 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:03:43,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:03:43,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:43,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:03:43,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:03:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:03:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 13 proven. 91 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-18 10:03:44,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:03:44,112 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:03:44,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 10:03:44,153 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 10:03:44,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:03:44,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:03:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 25 proven. 92 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-18 10:03:44,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:03:44,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 27 [2018-11-18 10:03:44,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-18 10:03:44,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-18 10:03:44,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2018-11-18 10:03:44,332 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 27 states. [2018-11-18 10:03:44,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:03:44,602 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2018-11-18 10:03:44,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 10:03:44,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2018-11-18 10:03:44,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:03:44,603 INFO L225 Difference]: With dead ends: 53 [2018-11-18 10:03:44,603 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 10:03:44,604 INFO L604 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 [2018-11-18 10:03:44,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 10:03:44,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 10:03:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 10:03:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 10:03:44,604 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2018-11-18 10:03:44,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:03:44,604 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 10:03:44,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-18 10:03:44,605 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 10:03:44,605 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 10:03:44,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 10:03:44,768 INFO L425 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-18 10:03:44,768 INFO L428 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-18 10:03:44,768 INFO L421 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|)) [2018-11-18 10:03:44,769 INFO L425 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-18 10:03:44,769 INFO L421 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (and (< 1 |fibonacci_#in~n|) (let ((.cse0 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse1 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and .cse0 (<= 1 |fibonacci_#t~ret0|) (<= fibonacci_~n 3) .cse1) (and (<= 4 fibonacci_~n) .cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) .cse1)))) [2018-11-18 10:03:44,769 INFO L425 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-18 10:03:44,769 INFO L425 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-18 10:03:44,769 INFO L425 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-18 10:03:44,769 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-18 10:03:44,769 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 10:03:44,769 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:03:44,769 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:03:44,769 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 10:03:44,769 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 10:03:44,769 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 10:03:44,769 INFO L425 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2018-11-18 10:03:44,770 INFO L428 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: true [2018-11-18 10:03:44,770 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2018-11-18 10:03:44,770 INFO L425 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2018-11-18 10:03:44,770 INFO L425 ceAbstractionStarter]: For program point L27(lines 27 29) no Hoare annotation was computed. [2018-11-18 10:03:44,770 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2018-11-18 10:03:44,770 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2018-11-18 10:03:44,770 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2018-11-18 10:03:44,770 INFO L425 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-11-18 10:03:44,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 10:03:44 BoogieIcfgContainer [2018-11-18 10:03:44,774 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 10:03:44,774 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 10:03:44,774 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 10:03:44,775 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 10:03:44,775 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:03:40" (3/4) ... [2018-11-18 10:03:44,778 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 10:03:44,785 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-18 10:03:44,785 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 10:03:44,786 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 10:03:44,789 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 10:03:44,790 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 10:03:44,790 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 10:03:44,820 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_97709616-68c7-4343-bd63-d63a245debfa/bin-2019/uautomizer/witness.graphml [2018-11-18 10:03:44,821 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 10:03:44,821 INFO L168 Benchmark]: Toolchain (without parser) took 4349.21 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 280.0 MB). Free memory was 953.8 MB in the beginning and 1.1 GB in the end (delta: -129.5 MB). Peak memory consumption was 150.5 MB. Max. memory is 11.5 GB. [2018-11-18 10:03:44,822 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:03:44,822 INFO L168 Benchmark]: CACSL2BoogieTranslator took 137.63 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:03:44,823 INFO L168 Benchmark]: Boogie Preprocessor took 14.49 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:03:44,823 INFO L168 Benchmark]: RCFGBuilder took 164.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -209.6 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. [2018-11-18 10:03:44,823 INFO L168 Benchmark]: TraceAbstraction took 3983.61 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 114.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 60.0 MB). Peak memory consumption was 174.3 MB. Max. memory is 11.5 GB. [2018-11-18 10:03:44,824 INFO L168 Benchmark]: Witness Printer took 46.36 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2018-11-18 10:03:44,825 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 137.63 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.49 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 164.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -209.6 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3983.61 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 114.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 60.0 MB). Peak memory consumption was 174.3 MB. Max. memory is 11.5 GB. * Witness Printer took 46.36 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 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, 3.9s OverallTime, 10 OverallIterations, 13 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 183 SDtfs, 235 SDslu, 990 SDs, 0 SdLazy, 1508 SolverSat, 225 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 683 GetRequests, 481 SyntacticMatches, 5 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=9, 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, 10 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 83 PreInvPairs, 98 NumberOfFragments, 50 HoareAnnotationTreeSize, 83 FomulaSimplifications, 53 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 404 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 1010 NumberOfCodeBlocks, 961 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 991 ConstructedInterpolants, 0 QuantifiedInterpolants, 142811 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1016 ConjunctsInSsa, 134 ConjunctsInUnsatCore, 19 InterpolantComputations, 2 PerfectInterpolantSequences, 1822/2502 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...