./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/EvenOdd01_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd01_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bec5669c6fe02e51518958076fea4487ada345cf .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-03 06:43:53,447 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 06:43:53,448 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 06:43:53,454 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 06:43:53,454 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 06:43:53,454 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 06:43:53,455 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 06:43:53,456 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 06:43:53,456 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 06:43:53,457 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 06:43:53,457 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 06:43:53,457 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 06:43:53,458 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 06:43:53,458 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 06:43:53,459 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 06:43:53,459 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 06:43:53,459 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 06:43:53,460 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 06:43:53,462 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 06:43:53,462 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 06:43:53,463 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 06:43:53,463 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 06:43:53,464 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 06:43:53,465 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 06:43:53,465 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 06:43:53,465 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 06:43:53,465 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 06:43:53,466 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 06:43:53,466 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 06:43:53,467 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 06:43:53,467 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 06:43:53,468 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 06:43:53,468 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 06:43:53,468 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 06:43:53,469 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 06:43:53,469 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 06:43:53,469 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2018-12-03 06:43:53,479 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 06:43:53,479 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 06:43:53,480 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 06:43:53,480 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 06:43:53,480 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 06:43:53,481 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 06:43:53,481 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 06:43:53,481 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 06:43:53,481 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 06:43:53,481 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 06:43:53,481 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 06:43:53,481 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-03 06:43:53,482 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 06:43:53,482 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 06:43:53,482 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 06:43:53,483 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-03 06:43:53,483 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 06:43:53,483 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 06:43:53,483 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 06:43:53,483 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 06:43:53,483 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 06:43:53,483 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 06:43:53,484 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-12-03 06:43:53,484 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 06:43:53,484 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 06:43:53,484 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 06:43:53,484 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 06:43:53,484 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 06:43:53,485 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 06:43:53,485 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 06:43:53,485 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 06:43:53,485 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 06:43:53,485 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 06:43:53,485 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 06:43:53,486 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 06:43:53,486 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 06:43:53,486 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 06:43:53,486 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 06:43:53,486 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan 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 ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan 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 -> bec5669c6fe02e51518958076fea4487ada345cf [2018-12-03 06:43:53,509 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 06:43:53,516 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 06:43:53,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 06:43:53,519 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 06:43:53,520 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 06:43:53,520 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/../../sv-benchmarks/c/recursive/EvenOdd01_true-unreach-call_true-no-overflow_true-termination.c [2018-12-03 06:43:53,558 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/data/c4dfea893/dbbabfad144149b5841bdc4797321b54/FLAG676e2838a [2018-12-03 06:43:53,895 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 06:43:53,895 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/sv-benchmarks/c/recursive/EvenOdd01_true-unreach-call_true-no-overflow_true-termination.c [2018-12-03 06:43:53,899 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/data/c4dfea893/dbbabfad144149b5841bdc4797321b54/FLAG676e2838a [2018-12-03 06:43:54,294 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/data/c4dfea893/dbbabfad144149b5841bdc4797321b54 [2018-12-03 06:43:54,296 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 06:43:54,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 06:43:54,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 06:43:54,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 06:43:54,300 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 06:43:54,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 06:43:54" (1/1) ... [2018-12-03 06:43:54,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d10e54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:43:54, skipping insertion in model container [2018-12-03 06:43:54,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 06:43:54" (1/1) ... [2018-12-03 06:43:54,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 06:43:54,318 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 06:43:54,403 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 06:43:54,405 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 06:43:54,414 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 06:43:54,422 INFO L195 MainTranslator]: Completed translation [2018-12-03 06:43:54,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:43:54 WrapperNode [2018-12-03 06:43:54,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 06:43:54,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 06:43:54,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 06:43:54,423 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 06:43:54,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:43:54" (1/1) ... [2018-12-03 06:43:54,430 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:43:54" (1/1) ... [2018-12-03 06:43:54,434 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 06:43:54,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 06:43:54,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 06:43:54,434 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 06:43:54,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:43:54" (1/1) ... [2018-12-03 06:43:54,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:43:54" (1/1) ... [2018-12-03 06:43:54,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:43:54" (1/1) ... [2018-12-03 06:43:54,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:43:54" (1/1) ... [2018-12-03 06:43:54,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:43:54" (1/1) ... [2018-12-03 06:43:54,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:43:54" (1/1) ... [2018-12-03 06:43:54,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:43:54" (1/1) ... [2018-12-03 06:43:54,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 06:43:54,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 06:43:54,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 06:43:54,445 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 06:43:54,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:43:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/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 [2018-12-03 06:43:54,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 06:43:54,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 06:43:54,506 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2018-12-03 06:43:54,506 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2018-12-03 06:43:54,506 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2018-12-03 06:43:54,506 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2018-12-03 06:43:54,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 06:43:54,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 06:43:54,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 06:43:54,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 06:43:54,606 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 06:43:54,607 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 06:43:54,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:43:54 BoogieIcfgContainer [2018-12-03 06:43:54,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 06:43:54,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 06:43:54,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 06:43:54,610 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 06:43:54,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 06:43:54" (1/3) ... [2018-12-03 06:43:54,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@455e2479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:43:54, skipping insertion in model container [2018-12-03 06:43:54,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 06:43:54" (2/3) ... [2018-12-03 06:43:54,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@455e2479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 06:43:54, skipping insertion in model container [2018-12-03 06:43:54,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:43:54" (3/3) ... [2018-12-03 06:43:54,613 INFO L112 eAbstractionObserver]: Analyzing ICFG EvenOdd01_true-unreach-call_true-no-overflow_true-termination.c [2018-12-03 06:43:54,619 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 06:43:54,623 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-12-03 06:43:54,632 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-12-03 06:43:54,650 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 06:43:54,650 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 06:43:54,650 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 06:43:54,651 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 06:43:54,651 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 06:43:54,651 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 06:43:54,651 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 06:43:54,651 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 06:43:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2018-12-03 06:43:54,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-03 06:43:54,665 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:43:54,665 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:43:54,667 INFO L423 AbstractCegarLoop]: === Iteration 1 === [isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 06:43:54,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:43:54,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1145007729, now seen corresponding path program 1 times [2018-12-03 06:43:54,671 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:43:54,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:54,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:43:54,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:54,701 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:43:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:43:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:54,773 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:43:54,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:43:54,774 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:43:54,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 06:43:54,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 06:43:54,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 06:43:54,786 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 5 states. [2018-12-03 06:43:54,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:43:54,860 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2018-12-03 06:43:54,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 06:43:54,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-12-03 06:43:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:43:54,868 INFO L225 Difference]: With dead ends: 53 [2018-12-03 06:43:54,868 INFO L226 Difference]: Without dead ends: 30 [2018-12-03 06:43:54,870 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-03 06:43:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-03 06:43:54,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2018-12-03 06:43:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-03 06:43:54,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-12-03 06:43:54,896 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 11 [2018-12-03 06:43:54,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:43:54,896 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-12-03 06:43:54,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 06:43:54,896 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-12-03 06:43:54,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-03 06:43:54,896 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:43:54,896 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:43:54,897 INFO L423 AbstractCegarLoop]: === Iteration 2 === [isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 06:43:54,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:43:54,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1135501172, now seen corresponding path program 1 times [2018-12-03 06:43:54,897 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:43:54,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:54,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:43:54,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:54,898 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:43:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:43:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:54,921 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:43:54,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:43:54,922 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:43:54,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 06:43:54,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 06:43:54,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 06:43:54,923 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 5 states. [2018-12-03 06:43:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:43:54,947 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-12-03 06:43:54,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 06:43:54,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-12-03 06:43:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:43:54,948 INFO L225 Difference]: With dead ends: 30 [2018-12-03 06:43:54,948 INFO L226 Difference]: Without dead ends: 29 [2018-12-03 06:43:54,949 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-03 06:43:54,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-03 06:43:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2018-12-03 06:43:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-03 06:43:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-12-03 06:43:54,953 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 12 [2018-12-03 06:43:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:43:54,953 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-12-03 06:43:54,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 06:43:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-12-03 06:43:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-12-03 06:43:54,954 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:43:54,954 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:43:54,954 INFO L423 AbstractCegarLoop]: === Iteration 3 === [isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 06:43:54,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:43:54,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1227554316, now seen corresponding path program 1 times [2018-12-03 06:43:54,955 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:43:54,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:54,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:43:54,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:54,956 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:43:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:43:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:54,981 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:43:54,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:43:54,981 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:43:54,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 06:43:54,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 06:43:54,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 06:43:54,982 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 5 states. [2018-12-03 06:43:55,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:43:55,004 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-12-03 06:43:55,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 06:43:55,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-12-03 06:43:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:43:55,004 INFO L225 Difference]: With dead ends: 28 [2018-12-03 06:43:55,005 INFO L226 Difference]: Without dead ends: 27 [2018-12-03 06:43:55,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-03 06:43:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-03 06:43:55,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-03 06:43:55,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-03 06:43:55,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-12-03 06:43:55,007 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2018-12-03 06:43:55,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:43:55,008 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-12-03 06:43:55,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 06:43:55,008 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-12-03 06:43:55,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-03 06:43:55,008 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:43:55,008 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:43:55,008 INFO L423 AbstractCegarLoop]: === Iteration 4 === [isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 06:43:55,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:43:55,009 INFO L82 PathProgramCache]: Analyzing trace with hash -600521825, now seen corresponding path program 1 times [2018-12-03 06:43:55,009 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:43:55,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:55,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:43:55,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:55,009 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:43:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:43:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:55,042 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:43:55,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-03 06:43:55,042 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:43:55,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 06:43:55,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 06:43:55,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-03 06:43:55,042 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 7 states. [2018-12-03 06:43:55,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:43:55,091 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-12-03 06:43:55,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-03 06:43:55,091 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2018-12-03 06:43:55,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:43:55,092 INFO L225 Difference]: With dead ends: 35 [2018-12-03 06:43:55,092 INFO L226 Difference]: Without dead ends: 34 [2018-12-03 06:43:55,092 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-12-03 06:43:55,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-03 06:43:55,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-12-03 06:43:55,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-03 06:43:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-12-03 06:43:55,095 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 18 [2018-12-03 06:43:55,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:43:55,095 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-12-03 06:43:55,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 06:43:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-12-03 06:43:55,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 06:43:55,096 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:43:55,096 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:43:55,096 INFO L423 AbstractCegarLoop]: === Iteration 5 === [isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 06:43:55,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:43:55,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2031952855, now seen corresponding path program 1 times [2018-12-03 06:43:55,096 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:43:55,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:55,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:43:55,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:55,097 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:43:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:43:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:55,113 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 06:43:55,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 06:43:55,114 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 06:43:55,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 06:43:55,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 06:43:55,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 06:43:55,114 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 5 states. [2018-12-03 06:43:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:43:55,133 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-12-03 06:43:55,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 06:43:55,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-12-03 06:43:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:43:55,133 INFO L225 Difference]: With dead ends: 33 [2018-12-03 06:43:55,133 INFO L226 Difference]: Without dead ends: 32 [2018-12-03 06:43:55,134 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-03 06:43:55,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-03 06:43:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-12-03 06:43:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-03 06:43:55,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-12-03 06:43:55,136 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 23 [2018-12-03 06:43:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:43:55,137 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-12-03 06:43:55,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 06:43:55,137 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-12-03 06:43:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-03 06:43:55,137 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:43:55,137 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:43:55,137 INFO L423 AbstractCegarLoop]: === Iteration 6 === [isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 06:43:55,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:43:55,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1433970876, now seen corresponding path program 1 times [2018-12-03 06:43:55,138 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:43:55,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:55,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:43:55,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:55,138 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:43:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:43:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:55,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:43:55,201 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 06:43:55,202 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-12-03 06:43:55,203 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [9], [11], [13], [17], [21], [25], [27], [28], [29], [36], [40], [50], [52], [54], [55], [56], [58] [2018-12-03 06:43:55,222 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 06:43:55,222 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 06:43:55,300 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 06:43:55,300 INFO L272 AbstractInterpreter]: Visited 20 different actions 40 times. Never merged. Never widened. Performed 76 root evaluator evaluations with a maximum evaluation depth of 3. Performed 76 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-12-03 06:43:55,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:43:55,306 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 06:43:55,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:43:55,306 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/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 [2018-12-03 06:43:55,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:43:55,313 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 06:43:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:43:55,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:43:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:55,339 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:43:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:55,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 06:43:55,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2018-12-03 06:43:55,415 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 06:43:55,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-03 06:43:55,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-03 06:43:55,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2018-12-03 06:43:55,416 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 9 states. [2018-12-03 06:43:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:43:55,471 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-12-03 06:43:55,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 06:43:55,472 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-12-03 06:43:55,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:43:55,472 INFO L225 Difference]: With dead ends: 40 [2018-12-03 06:43:55,472 INFO L226 Difference]: Without dead ends: 39 [2018-12-03 06:43:55,472 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2018-12-03 06:43:55,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-03 06:43:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-12-03 06:43:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-03 06:43:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-12-03 06:43:55,476 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 24 [2018-12-03 06:43:55,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:43:55,476 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-12-03 06:43:55,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-03 06:43:55,476 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-12-03 06:43:55,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-12-03 06:43:55,476 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:43:55,477 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:43:55,477 INFO L423 AbstractCegarLoop]: === Iteration 7 === [isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 06:43:55,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:43:55,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1111789655, now seen corresponding path program 1 times [2018-12-03 06:43:55,477 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:43:55,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:55,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:43:55,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:55,478 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:43:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:43:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:55,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:43:55,534 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 06:43:55,534 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-12-03 06:43:55,534 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [9], [11], [12], [13], [17], [21], [25], [27], [29], [36], [40], [50], [52], [54], [55], [56], [58] [2018-12-03 06:43:55,535 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 06:43:55,535 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 06:43:55,550 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 06:43:55,550 INFO L272 AbstractInterpreter]: Visited 20 different actions 39 times. Never merged. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 3. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-12-03 06:43:55,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:43:55,551 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 06:43:55,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:43:55,552 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/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 [2018-12-03 06:43:55,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:43:55,560 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 06:43:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:43:55,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:43:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:55,573 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:43:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:55,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 06:43:55,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2018-12-03 06:43:55,691 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 06:43:55,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-03 06:43:55,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-03 06:43:55,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2018-12-03 06:43:55,692 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 11 states. [2018-12-03 06:43:55,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:43:55,791 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-12-03 06:43:55,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-03 06:43:55,792 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2018-12-03 06:43:55,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:43:55,792 INFO L225 Difference]: With dead ends: 46 [2018-12-03 06:43:55,792 INFO L226 Difference]: Without dead ends: 45 [2018-12-03 06:43:55,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2018-12-03 06:43:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-03 06:43:55,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-12-03 06:43:55,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-03 06:43:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-12-03 06:43:55,797 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 30 [2018-12-03 06:43:55,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:43:55,797 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-12-03 06:43:55,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-03 06:43:55,797 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-12-03 06:43:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-03 06:43:55,797 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:43:55,797 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:43:55,798 INFO L423 AbstractCegarLoop]: === Iteration 8 === [isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 06:43:55,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:43:55,798 INFO L82 PathProgramCache]: Analyzing trace with hash -2046248452, now seen corresponding path program 2 times [2018-12-03 06:43:55,798 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:43:55,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:55,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 06:43:55,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:55,799 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:43:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:43:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:55,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:43:55,869 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 06:43:55,869 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 06:43:55,869 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 06:43:55,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:43:55,869 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/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 [2018-12-03 06:43:55,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 06:43:55,875 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 06:43:55,883 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 06:43:55,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 06:43:55,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:43:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:55,893 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:43:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:56,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 06:43:56,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-12-03 06:43:56,016 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 06:43:56,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-03 06:43:56,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-03 06:43:56,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2018-12-03 06:43:56,017 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 13 states. [2018-12-03 06:43:56,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:43:56,103 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-12-03 06:43:56,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 06:43:56,104 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2018-12-03 06:43:56,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:43:56,104 INFO L225 Difference]: With dead ends: 52 [2018-12-03 06:43:56,104 INFO L226 Difference]: Without dead ends: 51 [2018-12-03 06:43:56,104 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2018-12-03 06:43:56,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-12-03 06:43:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-12-03 06:43:56,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-03 06:43:56,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-12-03 06:43:56,108 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 36 [2018-12-03 06:43:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:43:56,108 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-12-03 06:43:56,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-03 06:43:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-12-03 06:43:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-03 06:43:56,108 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:43:56,109 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:43:56,109 INFO L423 AbstractCegarLoop]: === Iteration 9 === [isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 06:43:56,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:43:56,109 INFO L82 PathProgramCache]: Analyzing trace with hash -517011185, now seen corresponding path program 2 times [2018-12-03 06:43:56,109 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:43:56,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:56,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 06:43:56,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:56,110 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:43:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:43:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:56,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:43:56,180 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 06:43:56,180 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 06:43:56,180 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 06:43:56,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:43:56,180 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/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 [2018-12-03 06:43:56,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 06:43:56,186 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 06:43:56,192 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 06:43:56,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 06:43:56,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:43:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:56,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:43:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:56,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 06:43:56,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2018-12-03 06:43:56,351 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 06:43:56,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-03 06:43:56,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-03 06:43:56,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2018-12-03 06:43:56,352 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 15 states. [2018-12-03 06:43:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:43:56,444 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-12-03 06:43:56,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 06:43:56,445 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2018-12-03 06:43:56,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:43:56,446 INFO L225 Difference]: With dead ends: 58 [2018-12-03 06:43:56,446 INFO L226 Difference]: Without dead ends: 57 [2018-12-03 06:43:56,446 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2018-12-03 06:43:56,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-03 06:43:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-12-03 06:43:56,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-03 06:43:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-12-03 06:43:56,452 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 42 [2018-12-03 06:43:56,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:43:56,453 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-12-03 06:43:56,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-03 06:43:56,453 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-12-03 06:43:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-03 06:43:56,454 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 06:43:56,454 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 06:43:56,454 INFO L423 AbstractCegarLoop]: === Iteration 10 === [isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-03 06:43:56,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 06:43:56,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1095513932, now seen corresponding path program 3 times [2018-12-03 06:43:56,454 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 06:43:56,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:56,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 06:43:56,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 06:43:56,455 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 06:43:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 06:43:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:56,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:43:56,556 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 06:43:56,556 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 06:43:56,556 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 06:43:56,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 06:43:56,556 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/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 [2018-12-03 06:43:56,564 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 06:43:56,564 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 06:43:56,573 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 06:43:56,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 06:43:56,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 06:43:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-12-03 06:43:56,631 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 06:43:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 06:43:56,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 06:43:56,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 16] total 35 [2018-12-03 06:43:56,858 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 06:43:56,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-03 06:43:56,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-03 06:43:56,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2018-12-03 06:43:56,859 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 21 states. [2018-12-03 06:43:56,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 06:43:56,915 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-12-03 06:43:56,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 06:43:56,915 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2018-12-03 06:43:56,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 06:43:56,916 INFO L225 Difference]: With dead ends: 56 [2018-12-03 06:43:56,916 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 06:43:56,916 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2018-12-03 06:43:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 06:43:56,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 06:43:56,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 06:43:56,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 06:43:56,917 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2018-12-03 06:43:56,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 06:43:56,917 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 06:43:56,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-03 06:43:56,917 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 06:43:56,917 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 06:43:56,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 06:43:57,021 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-03 06:43:57,021 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-03 06:43:57,021 INFO L448 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2018-12-03 06:43:57,022 INFO L448 ceAbstractionStarter]: For program point L32-1(line 32) no Hoare annotation was computed. [2018-12-03 06:43:57,022 INFO L444 ceAbstractionStarter]: At program point L32-2(line 32) the Hoare annotation is: (or (and (<= 1 isEven_~n) (<= isEven_~n 2147483647)) (< |isEven_#in~n| 1) (< 2147483647 |isEven_#in~n|)) [2018-12-03 06:43:57,022 INFO L448 ceAbstractionStarter]: For program point L29(lines 29 33) no Hoare annotation was computed. [2018-12-03 06:43:57,022 INFO L448 ceAbstractionStarter]: For program point L32-3(line 32) no Hoare annotation was computed. [2018-12-03 06:43:57,022 INFO L448 ceAbstractionStarter]: For program point L27(lines 27 33) no Hoare annotation was computed. [2018-12-03 06:43:57,022 INFO L451 ceAbstractionStarter]: At program point isEvenENTRY(lines 26 34) the Hoare annotation is: true [2018-12-03 06:43:57,022 INFO L448 ceAbstractionStarter]: For program point isEvenEXIT(lines 26 34) no Hoare annotation was computed. [2018-12-03 06:43:57,022 INFO L448 ceAbstractionStarter]: For program point isEvenFINAL(lines 26 34) no Hoare annotation was computed. [2018-12-03 06:43:57,022 INFO L448 ceAbstractionStarter]: For program point isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2018-12-03 06:43:57,022 INFO L448 ceAbstractionStarter]: For program point isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2018-12-03 06:43:57,022 INFO L448 ceAbstractionStarter]: For program point isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2018-12-03 06:43:57,022 INFO L448 ceAbstractionStarter]: For program point isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2018-12-03 06:43:57,022 INFO L448 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-12-03 06:43:57,022 INFO L448 ceAbstractionStarter]: For program point L22-1(line 22) no Hoare annotation was computed. [2018-12-03 06:43:57,022 INFO L444 ceAbstractionStarter]: At program point L22-2(line 22) the Hoare annotation is: (or (< 2147483647 |isOdd_#in~n|) (and (not (= isOdd_~n 0)) (<= isOdd_~n 2147483647) (<= 0 isOdd_~n) (not (= isOdd_~n 1))) (< |isOdd_#in~n| 0)) [2018-12-03 06:43:57,022 INFO L448 ceAbstractionStarter]: For program point L19(lines 19 23) no Hoare annotation was computed. [2018-12-03 06:43:57,022 INFO L448 ceAbstractionStarter]: For program point L22-3(line 22) no Hoare annotation was computed. [2018-12-03 06:43:57,023 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 23) no Hoare annotation was computed. [2018-12-03 06:43:57,023 INFO L448 ceAbstractionStarter]: For program point isOddFINAL(lines 16 24) no Hoare annotation was computed. [2018-12-03 06:43:57,023 INFO L451 ceAbstractionStarter]: At program point isOddENTRY(lines 16 24) the Hoare annotation is: true [2018-12-03 06:43:57,023 INFO L448 ceAbstractionStarter]: For program point isOddEXIT(lines 16 24) no Hoare annotation was computed. [2018-12-03 06:43:57,023 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-03 06:43:57,023 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-03 06:43:57,023 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-03 06:43:57,023 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-03 06:43:57,023 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 37 49) the Hoare annotation is: true [2018-12-03 06:43:57,023 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 37 49) no Hoare annotation was computed. [2018-12-03 06:43:57,023 INFO L448 ceAbstractionStarter]: For program point L47(line 47) no Hoare annotation was computed. [2018-12-03 06:43:57,023 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 37 49) no Hoare annotation was computed. [2018-12-03 06:43:57,023 INFO L448 ceAbstractionStarter]: For program point L44(lines 44 48) no Hoare annotation was computed. [2018-12-03 06:43:57,023 INFO L444 ceAbstractionStarter]: At program point L42(line 42) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 2147483647)) [2018-12-03 06:43:57,023 INFO L448 ceAbstractionStarter]: For program point L42-1(line 42) no Hoare annotation was computed. [2018-12-03 06:43:57,023 INFO L448 ceAbstractionStarter]: For program point L39(lines 39 41) no Hoare annotation was computed. [2018-12-03 06:43:57,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 06:43:57 BoogieIcfgContainer [2018-12-03 06:43:57,025 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 06:43:57,025 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 06:43:57,025 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 06:43:57,025 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 06:43:57,025 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 06:43:54" (3/4) ... [2018-12-03 06:43:57,027 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-03 06:43:57,031 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-03 06:43:57,031 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isEven [2018-12-03 06:43:57,031 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isOdd [2018-12-03 06:43:57,031 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-03 06:43:57,034 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-03 06:43:57,034 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-03 06:43:57,034 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-03 06:43:57,058 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_dad9b9c2-0a5c-4aeb-ad16-7f86fe97f4e7/bin-2019/utaipan/witness.graphml [2018-12-03 06:43:57,058 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 06:43:57,059 INFO L168 Benchmark]: Toolchain (without parser) took 2761.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 951.3 MB in the beginning and 1.1 GB in the end (delta: -136.8 MB). Peak memory consumption was 3.8 MB. Max. memory is 11.5 GB. [2018-12-03 06:43:57,059 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 06:43:57,060 INFO L168 Benchmark]: CACSL2BoogieTranslator took 124.78 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-03 06:43:57,060 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.10 ms. Allocated memory is still 1.0 GB. Free memory is still 940.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 06:43:57,060 INFO L168 Benchmark]: Boogie Preprocessor took 10.44 ms. Allocated memory is still 1.0 GB. Free memory is still 940.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 06:43:57,060 INFO L168 Benchmark]: RCFGBuilder took 162.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 935.2 MB in the beginning and 1.1 GB in the end (delta: -146.5 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. [2018-12-03 06:43:57,060 INFO L168 Benchmark]: TraceAbstraction took 2416.92 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 44.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -12.4 MB). Peak memory consumption was 31.6 MB. Max. memory is 11.5 GB. [2018-12-03 06:43:57,061 INFO L168 Benchmark]: Witness Printer took 33.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.1 MB). Peak memory consumption was 6.1 MB. Max. memory is 11.5 GB. [2018-12-03 06:43:57,062 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 124.78 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.10 ms. Allocated memory is still 1.0 GB. Free memory is still 940.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.44 ms. Allocated memory is still 1.0 GB. Free memory is still 940.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 162.53 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 935.2 MB in the beginning and 1.1 GB in the end (delta: -146.5 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2416.92 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 44.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -12.4 MB). Peak memory consumption was 31.6 MB. Max. memory is 11.5 GB. * Witness Printer took 33.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.1 MB). Peak memory consumption was 6.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 32]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 32]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 4 error locations. SAFE Result, 2.3s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 146 SDtfs, 198 SDslu, 743 SDs, 0 SdLazy, 657 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 466 GetRequests, 301 SyntacticMatches, 6 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 9 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 21 PreInvPairs, 21 NumberOfFragments, 53 HoareAnnotationTreeSize, 21 FomulaSimplifications, 355 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 386 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 441 NumberOfCodeBlocks, 441 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 601 ConstructedInterpolants, 0 QuantifiedInterpolants, 85633 SizeOfPredicates, 30 NumberOfNonLiveVariables, 325 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 46/373 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...